Android计算器应用程序：不幸的是应用程序已停止

我是新的adnroid和triying开发计算器应用程序。Android计算器应用程序：不幸的是应用程序已停止

我的应用程序没有错误，但它不起作用。当我运行应用程序时，它说HesapMakinası已停止。

这是我的代码。变量是土耳其语。

package com.example.hesapmakinesi; 


import android.app.Activity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 

public class MainActivity extends Activity { 
    /** Called when the activity is first created. */ 
    double sayi1=0; 
    double sayi2=0; 
    String islem; 
    double sonuc=0; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     Button no0 = (Button)findViewById(R.id.button1); 
     Button no1 = (Button)findViewById(R.id.button2); 
     Button no2 = (Button)findViewById(R.id.button3); 
     Button no3 = (Button)findViewById(R.id.button4); 
     Button no4 = (Button)findViewById(R.id.button5); 
     Button no5 = (Button)findViewById(R.id.button6); 
     Button no6 = (Button)findViewById(R.id.button7); 
     Button no7 = (Button)findViewById(R.id.button8); 
     Button no8 = (Button)findViewById(R.id.button9); 
     Button no9 = (Button)findViewById(R.id.button10); 
     Button arti = (Button)findViewById(R.id.button11); 
     Button eksi = (Button)findViewById(R.id.button12); 
     Button carpi = (Button)findViewById(R.id.button14); 
     Button bolu = (Button)findViewById(R.id.button13); 
     Button esittir = (Button)findViewById(R.id.button15); 
     Button sifirla = (Button)findViewById(R.id.button16); 
     Button teksil = (Button)findViewById(R.id.button17); 



     final EditText islemekran = (EditText)findViewById(R.id.islemekran); 

     // Her Button ve Edittext için bir nesne tanımlandı ve 
     // findViewById fonksiyonuyla nesnelere bileşenler atandı.  
     //0-9 arası sayılar için tıklama olayları ve gerekli kodlar. 

     no0.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 

       islemekran.setText(islemekran.getText()+"0");    
      } 
     }); 

     no1.setOnClickListener(new View.OnClickListener() {   
      @Override 
      public void onClick(View v) { 

       islemekran.setText(islemekran.getText()+"1"); 
      } 
     }); 

     no2.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"2"); 
     } 
     }); 

     no3.setOnClickListener(new View.OnClickListener() {  
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"3"); 
     } 
     }); 

     no4.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"4"); 
     } 
     }); 

     no5.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"5"); 
     } 
     }); 

     no6.setOnClickListener(new View.OnClickListener() {  
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"6"); 
     } 
     }); 

     no7.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"7"); 
     } 
     }); 

     no8.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"8"); 
     } 
     }); 

     no9.setOnClickListener(new View.OnClickListener() {  
     @Override 
     public void onClick(View v) { 

      islemekran.setText(islemekran.getText()+"9"); 
     } 
     }); 
     // İşlemler için tıklama olayları ve gerekli kodlar 

     arti.setOnClickListener(new View.OnClickListener() {   
     @Override 
     public void onClick(View v) { 

      try {   
       sayi1=Double.parseDouble(islemekran.getText().toString()); 
       islemekran.setText(""); 
       islem = "+"; 
      } catch (Exception e) { 

      }  
     } 
     }); 

     eksi.setOnClickListener(new View.OnClickListener() {  
     @Override 
     public void onClick(View v) { 

      if(!(islemekran.getText().toString().equals(""))) 
      { 
       sayi1=Double.parseDouble(islemekran.getText().toString()); 
       islemekran.setText(""); 
       islem = "-"; 
      }  
     } 
     }); 

     carpi.setOnClickListener(new View.OnClickListener() {  
     @Override 
     public void onClick(View v) { 

      if(!(islemekran.getText().toString().equals(""))) 
      { 
       sayi1=Double.parseDouble(islemekran.getText().toString()); 
       islemekran.setText(""); 
       islem = "x"; 
      }  
     } 
     }); 

     bolu.setOnClickListener(new View.OnClickListener() {   
     @Override 
     public void onClick(View v) { 

      if(!(islemekran.getText().toString().equals(""))) 
      { 
       sayi1=Double.parseDouble(islemekran.getText().toString()); 
       islemekran.setText(""); 
       islem = "/"; 
      } 
     } 
     }); 

     esittir.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      try { 
       sayi2=Double.parseDouble((islemekran.getText().toString())); 

       if(islem.equals("+")) 
       {    
        sonuc = sayi1+sayi2; 
        sayi1=0; 
        sayi2=0; 
       }else if(islem.equals("-")) 
       { 
        sonuc = sayi1-sayi2; 
        sayi1=0; 
        sayi2=0; 
       }else if(islem.equals("x")) 
       { 
        sonuc = sayi1*sayi2; 
        sayi1=0; 
        sayi2=0; 
       } 
       else if(islem.equals("/")) 
       { 
        sonuc = sayi1/sayi2; 
        sayi1=0; 
        sayi2=0; 
       } 
      islemekran.setText(Double.toString(sonuc)); 
      } catch (Exception e) {   

      } 
     } 
     }); 

     sifirla.setOnClickListener(new View.OnClickListener() {  
      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       try { 
        islemekran.setText(""); 
        islem=""; 
        sayi1=0; 
        sayi2=0; 
       } catch (Exception e) { 

       }    
      } 
     }); 

     teksil.setOnClickListener(new View.OnClickListener() {  
      @Override 
      public void onClick(View v) { 

       try { 
        if(!(islemekran.getText().toString().equals(""))) 
        { 
         String kopyaekran = islemekran.getText().toString(); 
         kopyaekran=kopyaekran.substring(0, kopyaekran.length()-1); 
         islemekran.setText(kopyaekran); 
        }else 
        { 
         islem=""; 
        }     
       } catch (Exception e) { 

       }     
      } 
     }); 
    } 



    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 
}

布局

</EditText> 

    <Button 
     android:id="@+id/button2" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBaseline="@+id/button1" 
     android:layout_alignBottom="@+id/button1" 
     android:layout_centerHorizontal="true" 
     android:text="@string/no2" /> 

    <Button 
     android:id="@+id/button3" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBaseline="@+id/button2" 
     android:layout_alignBottom="@+id/button2" 
     android:layout_alignParentRight="true" 
     android:layout_marginRight="18dp" 
     android:text="@string/no3" /> 

    <Button 
     android:id="@+id/button6" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button3" 
     android:layout_alignTop="@+id/button5" 
     android:text="@string/no6" /> 

    <Button 
     android:id="@+id/button8" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignTop="@+id/button7" 
     android:layout_centerHorizontal="true" 
     android:text="@string/no8" /> 

    <Button 
     android:id="@+id/button9" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button6" 
     android:layout_alignTop="@+id/button8" 
     android:text="@string/no9" /> 

    <Button 
     android:id="@+id/button12" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button9" 
     android:layout_alignTop="@+id/button11" 
     android:text="@string/eksi" /> 

    <Button 
     android:id="@+id/button14" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBaseline="@+id/button13" 
     android:layout_alignBottom="@+id/button13" 
     android:layout_alignLeft="@+id/button11" 
     android:text="@string/arti" /> 

    <Button 
     android:id="@+id/button15" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button12" 
     android:layout_alignTop="@+id/button14" 
     android:text="@string/carpi" /> 

    <Button 
     android:id="@+id/button1" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentLeft="true" 
     android:layout_below="@+id/editText1" 
     android:layout_marginLeft="14dp" 
     android:text="@string/no1" /> 

    <Button 
     android:id="@+id/button17" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBaseline="@+id/button16" 
     android:layout_alignBottom="@+id/button16" 
     android:layout_alignLeft="@+id/button15" 
     android:text="@string/esittir" /> 

    <Button 
     android:id="@+id/button11" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBaseline="@+id/button10" 
     android:layout_alignBottom="@+id/button10" 
     android:layout_alignLeft="@+id/button8" 
     android:text="@string/arti" /> 

    <Button 
     android:id="@+id/button7" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button4" 
     android:layout_below="@+id/button4" 
     android:text="@string/no7" /> 

    <Button 
     android:id="@+id/button10" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button7" 
     android:layout_below="@+id/button7" 
     android:text="@string/no0" /> 

    <Button 
     android:id="@+id/button13" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button10" 
     android:layout_below="@+id/button10" 
     android:text="@string/bolu" /> 

    <Button 
     android:id="@+id/button16" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button13" 
     android:layout_alignRight="@+id/button14" 
     android:layout_below="@+id/button14" 
     android:layout_marginTop="32dp" 
     android:textColor="#00FF00" 
     android:text="@string/sil" /> 

    <Button 
     android:id="@+id/button4" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/button1" 
     android:layout_below="@+id/button1" 
     android:text="@string/no4"/> 

    <Button 
     android:id="@+id/button5" 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_above="@+id/button8" 
     android:layout_alignLeft="@+id/button8" 
     android:text="@string/no5" /> 

</RelativeLayout>

logcat的更新

05-27 16:46:18.641: E/Trace(802): error opening trace file: No such file or directory (2) 
05-27 16:46:19.451: D/AndroidRuntime(802): Shutting down VM 
05-27 16:46:19.471: W/dalvikvm(802): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 
05-27 16:46:19.511: E/AndroidRuntime(802): FATAL EXCEPTION: main 
05-27 16:46:19.511: E/AndroidRuntime(802): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.hesapmakinesi/com.example.hesapmakinesi.MainActivity}: java.lang.NullPointerException 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.os.Handler.dispatchMessage(Handler.java:99) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.os.Looper.loop(Looper.java:137) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.ActivityThread.main(ActivityThread.java:5041) 
05-27 16:46:19.511: E/AndroidRuntime(802): at java.lang.reflect.Method.invokeNative(Native Method) 
05-27 16:46:19.511: E/AndroidRuntime(802): at java.lang.reflect.Method.invoke(Method.java:511) 
05-27 16:46:19.511: E/AndroidRuntime(802): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
05-27 16:46:19.511: E/AndroidRuntime(802): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
05-27 16:46:19.511: E/AndroidRuntime(802): at dalvik.system.NativeStart.main(Native Method) 
05-27 16:46:19.511: E/AndroidRuntime(802): Caused by: java.lang.NullPointerException 
05-27 16:46:19.511: E/AndroidRuntime(802): at com.example.hesapmakinesi.MainActivity.onCreate(MainActivity.java:46) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.Activity.performCreate(Activity.java:5104) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
05-27 16:46:19.511: E/AndroidRuntime(802): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
05-27 16:46:19.511: E/AndroidRuntime(802): ... 11 more 
05-27 16:47:00.441: I/Process(802): Sending signal. PID: 802 SIG: 9

来源

2013-05-26 ezgi

请添加logcat –

没有人会浏览所有代码，并在不知道LogCat的情况下查找可能的错误。 – Ahmad

我加了它。谢谢 – ezgi

您的活动无法找到ID为的NO0，NO1什么等等，因为在你的XML文件，他们有id的button2,button3等等。因此，当您尝试将OnClickListener设置为按钮时，NullPointerException。

因此，不是这样的：

Button no2 = (Button)findViewById(R.id.no2);

你需要这样的：

Button no2 = (Button)findViewById(R.id.button2);

而这样的。

来源

2013-05-26 20:16:44 zbr

我试过这个，但仍然没有工作！ – ezgi

你能否更新问题以反映你现在拥有的？ – zbr

我在路上添加了新的logcat.thank太多了 – ezgi

Android计算器应用程序：不幸的是应用程序已停止

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