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KAYNAK KOD ELDE ETME

Uygulamamın kodunu kaybettim.Uygulamayı android studio ile telefonumda çalıştırmıştım.Uygulama hala telefonun anasayfasında duruyor.Apkden kod çekeN showjava uygulamasını denedim ama bu uygulama gözükmüyor.Kodları çekmenin bir yolu var mı ?

Görsel kaldırıldı.

.

 

 

picture-127687-1496065350.jpg
7 yıl 1 ay önce yanıtladın

Operatör Gösterme

Operatörleri resimdeki gibi sayıların yanına yazdırmak istiyorum.Nasıl yapabilirim? Şimdiden teşekkürler :)

Görsel kaldırıldı.

MainActivity.java

package com.example.tckcakar.myapplication;


import android.content.Context;

import android.content.SharedPreferences;
import android.provider.SyncStateContract;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.EditText;
import android.widget.GridView;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    GridView gridView;
    float ilkdeger = 0;
    public double sonuc = 0;
    public String islem;
   EditText edit;
String displaystr;
    String[] dizi = {
            "7", "8", "9", "C", "4", "5", "6", "/", "1", "2", "3", "*", "0", "=", "+", "-"
    };

    public MainActivity() {
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edit= (EditText) findViewById(R.id.edit);
        gridView = (GridView) findViewById(R.id.gridView1);
        ArrayAdapter<String> adapter = new MyAdapter(this);
        adapter.addAll(dizi);//diziyi adaptöre gönderdik.
        gridView.setAdapter(adapter);//gridview ve adaptörü bağladık.
        adapter.notifyDataSetChanged();
        edit.setEnabled(false);
    }

    @Override
    public void onClick(View view) {
        int id = view.getId();

        switch (id) {
            case R.id.button:

                TextView textView = (TextView) view;
                String btnStr = textView.getText().toString();

             kay(btnStr);
                break;
        }

    }


 public  void kay (String btnStr) {
     if (btnStr.equals("1")) {
         edit.setText(edit.getText() +"1");
     } else if (btnStr.equals("2")) {
         edit.setText(edit.getText() +"2");
     } else if (btnStr.equals("3")) {
         edit.setText(edit.getText() +"3");
     } else if (btnStr.equals("4")) {
         edit.setText(edit.getText() +"4");
     } else if (btnStr.equals("5")) {
         edit.setText(edit.getText() +"5");
     } else if (btnStr.equals("6")) {
         edit.setText(edit.getText() +"6");
     } else if (btnStr.equals("7")) {
         edit.setText(edit.getText() +"7");
     } else if (btnStr.equals("8")) {
         edit.setText(edit.getText() +"8");
     } else if (btnStr.equals("9")) {
         edit.setText(edit.getText() +"9");
     } else if (btnStr.equals("C")) {
         try {
             ilkdeger = 0;
             sonuc = 0;
             edit.setText("");
         } catch (Exception C) {

         }

     } else if (btnStr.equals("+")) {
         try {


             if (!edit.getText().toString().isEmpty()) {
                 ilkdeger = Float.parseFloat(edit.getText().toString());
                 edit.setText("");
                 islem = "Toplama";

                 displaystr += "+";
             }
         } catch (Exception C) {
         }
     } else if (btnStr.equals("-")) {
         try {
             if (!edit.getText().toString().isEmpty()) {
                 ilkdeger = Float.parseFloat(edit.getText().toString());
                 edit.setText("");
                 islem = "Çıkarma";
             }


         } catch (Exception C) {

         }
     } else if (btnStr.equals("/")) {
         try {
             if (!edit.getText().toString().isEmpty()) {
                 ilkdeger = Float.parseFloat(edit.getText().toString());
                 edit.setText("");
                 islem = "Bölme";
             }


         } catch (Exception C) {

         }
     } else if (btnStr.equals("*")) {
         try {
             if (!edit.getText().toString().isEmpty()) {
                 ilkdeger = Float.parseFloat(edit.getText().toString());
                 edit.setText("");
                 islem = "Çarpma";
             }


         } catch (Exception C) {

         }
     } else if (btnStr.equals("="))
         if (!edit.getText().toString().isEmpty() && !String.valueOf(ilkdeger).equals("0")) {
             if (islem.equals("Toplama")) {
                 sonuc = ilkdeger + Float.parseFloat(edit.getText().toString());
             } else if (islem.equals("Çıkarma")) {
                 sonuc = ilkdeger - Float.parseFloat(edit.getText().toString());
             } else if (islem.equals("Çarpma")) {
                 sonuc = ilkdeger * Float.parseFloat(edit.getText().toString());
             } else if (islem.equals("Bölme")) {
                 sonuc = ilkdeger / Float.parseFloat(edit.getText().toString());


             }

             edit.setText(String.valueOf(sonuc));
             ilkdeger = 0;
             sonuc = 0;


         } else {
             edit.setText("Değer giriniz");

         }

     if (R.id.button == gridView.getId()
             ) {
         ilkdeger = 0;
         sonuc = 0;
         edit.setText("");
     }
 }



    private class MyAdapter extends ArrayAdapter<String> {//adaptörü sınıf olarak oluşturduk.

        MyAdapter(@NonNull Context context) {
            super(context, android.R.layout.simple_list_item_1);
        }

        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {// pozisyonunu alır ve çizer
            if (convertView == null) {
                convertView = getLayoutInflater().inflate(R.layout.calc_button, parent, false);//VİEWVİ GÖRSEL HALE GETİRRİ INFLATER
            }
            TextView button = convertView.findViewById(R.id.button);
            button.setText(getItem(position));//pozisyonu alır.

            button.setOnClickListener(MainActivity.this);

            return convertView;

        }

    }}



 

Uygulama sürekli duruyor

Uygulama birkaç kez çalıştı daha sonra sürekli durmaya başladı  ve aşağıdaki hatayı aldım.Clean ve rebulti denedim ama düzelmedi.

Logcat

08-08 10:18:14.484 30997-30997/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: com.example.tckcakar.myapplication, PID: 30997
                                                   java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.TextView
                                                       at com.example.tckcakar.myapplication.MainActivity$MyAdapter.getView(MainActivity.java:72)
                                                       at android.widget.AbsListView.obtainView(AbsListView.java:3238)
                                                       at android.widget.GridView.onMeasure(GridView.java:1096)
                                                       at android.view.View.measure(View.java:21051)
                                                       at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
                                                       at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
                                                       at android.view.View.measure(View.java:21051)
                                                       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459)
                                                       at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
                                                       at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
                                                       at android.view.View.measure(View.java:21051)
                                                       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459)
                                                       at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:391)
                                                       at android.view.View.measure(View.java:21051)
                                                       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459)
                                                       at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
                                                       at android.view.View.measure(View.java:21051)
                                                       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459)
                                                       at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)
                                                       at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)
                                                       at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)
                                                       at android.view.View.measure(View.java:21051)
                                                       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6459)
                                                       at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
                                                       at com.android.internal.policy.DecorView.onMeasure(DecorView.java:853)
                                                       at android.view.View.measure(View.java:21051)
                                                       at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2583)
                                                       at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1642)
                                                       at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1893)
                                                       at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1522)
                                                       at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7098)
                                                       at android.view.Choreographer$CallbackRecord.run(Choreographer.java:927)
                                                       at android.view.Choreographer.doCallbacks(Choreographer.java:702)
                                                       at android.view.Choreographer.doFrame(Choreographer.java:638)
                                                       at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:913)
                                                       at android.os.Handler.handleCallback(Handler.java:751)
                                                       at android.os.Handler.dispatchMessage(Handler.java:95)
                                                       at android.os.Looper.loop(Looper.java:154)
                                                       at android.app.ActivityThread.main(ActivityThread.java:6682)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

MainActivity.java

package com.example.tckcakar.myapplication;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.support.annotation.LayoutRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    GridView gridView;
    float ilkdeger = 0;
    public double sonuc = 0;
    public String islem;


    String[] dizi = {
            "7", "8", "9", "C", "4", "5", "6", "/", "1", "2", "3", "*", "0", "=", "+", "-"
    };

    public MainActivity() {
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView = (GridView) findViewById(R.id.gridView1);

        ArrayAdapter<String> adapter = new MyAdapter(this);
        adapter.addAll(dizi);//diziyi adaptöre gönderdik.
        gridView.setAdapter(adapter);//gridview ve adaptörü bağladık.
        adapter.notifyDataSetChanged();

     Intent intent=new Intent(this,click.class);
    startActivity(intent);

    }

    public void onAttachFragment(Activity activity) {
    }

    @Override
    public void onClick(View view) {

    }

    private class MyAdapter extends ArrayAdapter<String> {//adaptörü sınıf olarak oluşturduk.

        MyAdapter(@NonNull Context context) {
            super(context, android.R.layout.simple_list_item_1);
        }

        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {// pozisyonunu alır ve çizer
            if (convertView == null) {
                convertView = getLayoutInflater().inflate(R.layout.calc_button, parent, false);//VİEWVİ GÖRSEL HALE GETİRRİ INFLATER
            }

            TextView button = (TextView) convertView;
           button.setText(getItem(position));//pozisyonu alır.

            return button;

        }

    }



}

click.class

package com.example.tckcakar.myapplication;

import android.support.annotation.Nullable;
import android.view.View;
import android.widget.TextView;

/**
 * Created by TCKCAKAR on 7.8.2017.
 */

public class click extends MainActivity implements View.OnClickListener {
    TextView btn0 = (TextView) findViewById(R.id.textView0);
    TextView btn1 = (TextView) findViewById(R.id.textbir);
    TextView btn2 = (TextView) findViewById(R.id.textViewiki);
    TextView btn3 = (TextView) findViewById(R.id.textViewüç);
    TextView btn4 = (TextView) findViewById(R.id.textView4);
    TextView btn5 = (TextView) findViewById(R.id.textView5);
    TextView btn6 = (TextView) findViewById(R.id.textView6);
    TextView btn7 = (TextView) findViewById(R.id.textView2);
    TextView btn8 = (TextView) findViewById(R.id.textView1);
    TextView btn9 = (TextView) findViewById(R.id.textView3);
    TextView btnc = (TextView) findViewById(R.id.textViewC);
    TextView topla = (TextView) findViewById(R.id.topla);
    TextView cıkar = (TextView) findViewById(R.id.cıkar);
    TextView carp = (TextView) findViewById(R.id.textViewyıldız);
    TextView böl = (TextView) findViewById(R.id.bölme);
    TextView sonuç = (TextView) findViewById(R.id.textVieweşit);
    TextView edit = (TextView) findViewById(R.id.edit);

    {
        btn0.setOnClickListener(this);
        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);
        btn3.setOnClickListener(this);
        btn4.setOnClickListener(this);
        btn5.setOnClickListener(this);
        btn6.setOnClickListener(this);
        btn7.setOnClickListener(this);
        btn8.setOnClickListener(this);
        btn9.setOnClickListener(this);
        btnc.setOnClickListener(this);
        topla.setOnClickListener(this);
        cıkar.setOnClickListener(this);
        carp.setOnClickListener(this);
        böl.setOnClickListener(this);
        sonuç.setOnClickListener(this);
    }

    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.textbir:

                edit.setText(edit.getText() + "1");

            case R.id.textViewiki:
                edit.setText(edit.getText() + "2");

            case R.id.textViewüç:
                edit.setText(edit.getText() + "3");

            case R.id.textView4:
                edit.setText(edit.getText() + "4");

            case R.id.textView5:
                edit.setText(edit.getText() + "5");

            case R.id.textView6:

                edit.setText(edit.getText() + "6");

            case R.id.textView7:
                edit.setText(edit.getText() + "7");

            case R.id.textView8:
                edit.setText(edit.getText() + "8");

            case R.id.textView3:
                edit.setText(edit.getText() + "9");

            case R.id.textViewC:
                try {

                    ilkdeger = 0;
                    sonuc = 0;
                    edit.setText("");
                } catch (Exception btnC) {

                }

            case R.id.topla:

                try {
                    if (!edit.getText().toString().isEmpty()) {
                        ilkdeger = Float.parseFloat(edit.getText().toString());
                        edit.setText("");
                        islem = "Toplama";
                    }


                } catch (Exception C) {

                }


            case R.id.cıkar:
                try {
                    if (!edit.getText().toString().isEmpty()) {
                        ilkdeger = Float.parseFloat(edit.getText().toString());
                        edit.setText("");
                        islem = "Çıkarma";
                    }

                } catch (Exception C) {

                }

            case R.id.textViewyıldız:

                try {
                    if (!edit.getText().toString().isEmpty()) {
                        ilkdeger = Float.parseFloat(edit.getText().toString());
                        edit.setText("");
                        islem = "Çarpma";
                    }

                } catch (Exception C) {

                }


            case R.id.bölme:
                try {

                    if (!edit.getText().toString().isEmpty()) {
                        ilkdeger = Float.parseFloat(edit.getText().toString());
                        edit.setText("");
                        islem = "Bölme";
                    }

                } catch (Exception C) {

                }

            case R.id.textVieweşit:
                if (!edit.getText().toString().isEmpty() && !String.valueOf(ilkdeger).equals("0")) {
                    if (islem.equals("Toplama")) {
                        sonuc = ilkdeger + Float.parseFloat(edit.getText().toString());
                    } else if (islem.equals("Çıkarma")) {
                        sonuc = ilkdeger - Float.parseFloat(edit.getText().toString());
                    } else if (islem.equals("Çarpma")) {
                        sonuc = ilkdeger * Float.parseFloat(edit.getText().toString());
                    } else if (islem.equals("Bölme")) {
                        sonuc = ilkdeger / Float.parseFloat(edit.getText().toString());


                    }

                    edit.setText(String.valueOf(sonuc));
                    ilkdeger = 0;
                    sonuc = 0;


                } else {
                    edit.setText("Değer giriniz");

                }

                if (R.id.textViewC == v.getId()
                        ) {
                    ilkdeger = 0;
                    sonuc = 0;
                    edit.setText("");
                }
        }

    }
}

activy_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.tckcakar.myapplication.MainActivity">
<TextView
    android:layout_width="0dp"
    android:layout_height="495dp"
    tools:layout_editor_absoluteY="-265dp"
    tools:layout_editor_absoluteX="98dp"
    android:id="@+id/edit"/>

    <GridView
        android:id="@+id/gridView1"
        android:layout_width="82dp"
        android:layout_height="495dp"
        android:columnWidth="50dp"
        android:gravity="center"
        android:numColumns="4"
        tools:layout_editor_absoluteX="122dp"
        tools:layout_editor_absoluteY="60dp">

    </GridView>

</RelativeLayout>

calc_button.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="300dp"
    android:layout_height="300dp"
    android:weightSum="1">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_weight="0.05"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="7"
        android:textAlignment="center"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/textView7"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="8"
        android:textAlignment="center"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/textView2"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textView3"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="9"
        android:textAlignment="center"
        android:layout_toEndOf="@+id/textView1"
        android:layout_above="@+id/textView5"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textViewC"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="C"
        android:textAlignment="center"
        android:layout_below="@+id/textView8"
        android:layout_toEndOf="@+id/textView3"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textView4"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="4"
        android:textAlignment="center"
        android:layout_below="@+id/textView2"
        android:layout_toEndOf="@+id/textView7"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textView5"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="5"
        android:textAlignment="center"
        android:clickable = "true"
        android:layout_below="@+id/textView1"
        android:layout_toEndOf="@+id/textView2" />
    <TextView
        android:id="@+id/textView6"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="6"
        android:textAlignment="center"
        android:layout_above="@+id/textViewiki"
        android:layout_alignEnd="@+id/textViewüç"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/bölme"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="/"
        android:textAlignment="center"
        android:layout_above="@+id/textViewüç"
        android:layout_alignEnd="@+id/textViewC"
        android:clickable = "true"/>




    <TextView
        android:id="@+id/textbir"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="1"
        android:textAlignment="center"
        android:layout_alignBottom="@+id/textViewiki"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textViewiki"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="2"
        android:textAlignment="center"
        android:layout_below="@+id/textView5"
        android:layout_toEndOf="@+id/textbir"
        android:clickable = "true"/>
    <TextView
        android:id="@+id/textViewüç"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="3"
        android:textAlignment="center"
        android:layout_below="@+id/textView6"
        android:layout_toEndOf="@+id/textView5"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textViewyıldız"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="*"
        android:textAlignment="center"
        android:layout_below="@+id/bölme"
        android:layout_toEndOf="@+id/textView6"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textView0"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="0"
        android:textAlignment="center"
        android:layout_below="@+id/textbir"
        android:layout_toEndOf="@+id/textView7"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/textVieweşit"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="="
        android:textAlignment="center"
        android:layout_toEndOf="@+id/textView0"
        android:layout_alignBottom="@+id/textView0"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/cıkar"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="-"
        android:textAlignment="center"
        android:layout_toEndOf="@+id/textView3"
        android:layout_alignBottom="@+id/textView0"
        android:clickable = "true"/>

    <TextView
        android:id="@+id/topla"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="+"
        android:textAlignment="center"
        android:layout_alignBottom="@+id/textVieweşit"
        android:layout_toStartOf="@+id/cıkar"
        android:clickable = "true"/>


</RelativeLayout>

 

Implemantasyon

Bu koddaki OnClickListenerları daha kısa  bir şekilde implement etmek istiyorum yani kodun kısalmasını isitiyorum.Bunu interface ile nasıl yapabilirim?

MainActivity.class

package com.example.tckcakar.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements OnClickListener {
private float ilkdeger=0;
    private  double sonuc=0;
    private  String islem;
    public MainActivity() {

    }



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
final TextView txt= (TextView) findViewById(R.id.txt);
        Button c= (Button) findViewById(R.id.sil);
        Button btn0= (Button) findViewById(R.id.buton0);
        Button btn1= (Button) findViewById(R.id.buton1);
        Button btn2= (Button) findViewById(R.id.buton2);
        Button btn3= (Button) findViewById(R.id.buton3);
        Button btn4= (Button) findViewById(R.id.buton4);
        Button btn5= (Button) findViewById(R.id.buton5);
        Button btn6= (Button) findViewById(R.id.buton6);
        Button btn7= (Button) findViewById(R.id.buton7);
        Button btn8= (Button) findViewById(R.id.buton8);
        Button btn9= (Button) findViewById(R.id.buton9);
        final Button topla= (Button) findViewById(R.id.topla);
        Button çıkar= (Button) findViewById(R.id.çıkar);
        Button çarp= (Button) findViewById(R.id.çarpma);
        Button böl= (Button) findViewById(R.id.bölme);
        final Button sonuç= (Button) findViewById(R.id.Sonuç);

btn1.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View view) {
        txt.setText(txt.getText()+ "1");
    }
});

        btn2.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText().toString()+ "2");
            }
        });

        btn3.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "3");
            }
        });

        btn4.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "4");
            }
        });

        btn5.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "1");
            }
        });

        btn6.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "6");
            }
        });

        btn7.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "7");
            }
        });

        btn8.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "8");
            }
        });

        btn9.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "9");
            }
        });
        btn0.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                txt.setText(txt.getText()+ "0");

            }
        });

        try {c.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                ilkdeger=0;
                        sonuc=0;
                txt.setText("");
            }
        });

        }
catch (Exception C){

    }

    try {topla.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View view) {
           if(!txt.getText().toString().isEmpty()){
               ilkdeger= Float.parseFloat(txt.getText().toString());
               txt.setText("");
               islem="Toplama";
           }

        }
    });

    }
catch (Exception C){

    }


        try {çıkar.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if(!txt.getText().toString().isEmpty()){
                    ilkdeger= Float.parseFloat(txt.getText().toString());
                    txt.setText("");
                    islem="Çıkarma";
                }

            }
        });

        }
        catch (Exception C){

        }

        try {çarp.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if(!txt.getText().toString().isEmpty()){
                    ilkdeger= Float.parseFloat(txt.getText().toString());
                    txt.setText("");
                    islem="Çarpma";
                }

            }
        });

        }
        catch (Exception C){

        }


        try {böl.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if(!txt.getText().toString().isEmpty()){
                    ilkdeger= Float.parseFloat(txt.getText().toString());
                    txt.setText("");
                    islem="Bölme";
                }

            }
        });

        }
        catch (Exception C){

        }

        sonuç.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                if(!txt.getText().toString().isEmpty() && !String.valueOf(ilkdeger).equals("0")){
                    if(islem.equals("Toplama")){
                        sonuc= ilkdeger + Float.parseFloat(txt.getText().toString());
            }
                    else if(islem.equals("Çıkarma")) {
                        sonuc = ilkdeger - Float.parseFloat(txt.getText().toString());
                    }

                        else if(islem.equals("Çarpma")){
                            sonuc= ilkdeger * Float.parseFloat(txt.getText().toString());
        }
                    else if(islem.equals("Bölme")) {
                        sonuc = ilkdeger / Float.parseFloat(txt.getText().toString());


                    }

                    txt.setText(String.valueOf(sonuc));
                    ilkdeger=0;
                            sonuc=0;


                }

            else{
            txt.setText("Değer giriniz");

                }

                if (R.id.sil == view.getId()
                        ) {
                    ilkdeger=0;
                    sonuc=0;
                    txt.setText("");
                }
                }

          });}

    @Override
    public void onClick(View view) {

    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.tckcakar.myapplication.MainActivity">

    <TextView
        android:id="@+id/txt"
        android:layout_width="167dp"
        android:layout_height="44dp"
        android:layout_alignParentTop="true"
        android:layout_alignStart="@+id/linear1"
        android:layout_marginTop="53dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.073"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.034" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:id="@+id/linear1"
        android:layout_below="@+id/txt"
        android:layout_alignParentEnd="true"
        android:layout_marginTop="11dp">

        <Button
            android:id="@+id/buton1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="1" />

        <Button
            android:id="@+id/buton2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="2"
             />

        <Button
            android:id="@+id/buton3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="3" />

        <Button
            android:id="@+id/sil"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="C" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:id="@+id/linear2"
        android:layout_alignTop="@+id/linear1"
        android:layout_alignParentStart="true"
        android:layout_marginTop="53dp">

        <Button
            android:id="@+id/buton4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="4"
            />

        <Button
            android:id="@+id/buton5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="5"
            />

        <Button
            android:id="@+id/buton6"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="6"
            />

        <Button
            android:id="@+id/topla"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="+" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:id="@+id/linear3"
        android:layout_alignTop="@+id/linear2"
        android:layout_alignParentStart="true"
        android:layout_marginTop="53dp">

        <Button
            android:id="@+id/buton7"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="7"
            />

        <Button
            android:id="@+id/buton8"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="8"
            />

        <Button
            android:id="@+id/buton9"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="9"
            />

        <Button
            android:id="@+id/çıkar"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="-" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:id="@+id/linear4"
        android:layout_alignTop="@+id/linear3"

        android:layout_marginTop="53dp">

        <Button
            android:id="@+id/buton0"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="0"
            />

        <Button
            android:id="@+id/bölme"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="/" />

        <Button
            android:id="@+id/çarpma"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="*" />

        <Button
            android:id="@+id/Sonuç"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="=" />

    </LinearLayout>


</RelativeLayout>

 

TextView Sorunu

İkinci sıraya neden textView ekleyemiyorum?

Main Activity'im

​

    GridView gridView;

    String[] dizi = {
            "7", "8", "9", "C", "4", "5", "6", "/", "1", "2", "3", "*", "0", "=", "+", "-"
    };

    @Override
    protected void onCreate(javascript:void(0)Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView = (GridView) findViewById(R.id.gridView1);

        ArrayAdapter<String> adapter = new MyAdapter(this);
        adapter.addAll(dizi);//diziyi adaptöre gönderdik.
        gridView.setAdapter(adapter);//gridview ve adaptörü bağladık.
        adapter.notifyDataSetChanged();
    }

    private class MyAdapter extends ArrayAdapter<String> {//adaptörü sınıf olarak oluşturduk.

        MyAdapter(@NonNull Context context) {
            super(context, android.R.layout.simple_list_item_1);
        }

        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {// pozisyonunu alır ve çizer
            if (convertView == null) {
                convertView = getLayoutInflater().inflate(R.layout.calc_button, parent, false);//VİEWVİ GÖRSEL HALE GETİRRİ INFLATER
            }

            TextView button = (TextView) convertView;
            button.setText(getItem(position));//pozisyonu alır.

            return button;
        }
    }
}

Click and drag to move
​

calc_button.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:weightSum="1">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="7"
        android:textAlignment="center"
        android:layout_weight="0.05"></TextView>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="8"
        android:textAlignment="center"></TextView>

    <TextView
        android:id="@+id/textView3"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="9"
        android:textAlignment="center"></TextView>

    <TextView
        android:id="@+id/textView"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:text="C"
        android:textAlignment="center"></TextView>



</LinearLayout>

Görsel kaldırıldı.

picture-127687-1496065350.jpg
7 yıl 3 ay önce yanıtladın