設置兩個onClickListeners時應用程序強制關閉

Question

下面的所有代碼都按照需要工作。也就是說，直到我嘗試添加第二個onClickListener到另一個圖像。我試圖添加的代碼以及我嘗試添加的代碼在下面的代碼中列出爲註釋。有人看到我在這裏失蹤的任何東西嗎？我感覺好像這個額外的實現應該沒有任何問題。

公共類MainActivity延伸活動{

ImageView mImage; 
//ImageView journal; 

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

    mImage = (ImageView)MainActivity.this.findViewById(R.id.Floaterimg); 
    //journal = (ImageView)MainActivity.this.findViewById(R.id.journbtn); 

    //journal.setOnClickListener(new View.OnClickListener() { 

     //@Override 
     //public void onClick (View v) { 
      //Intent i = new Intent(MainActivity.this, 
          //SecondActivity.class); 
      //startActivity(i); 
     //} 
    //}); 

    final Handler randomizer = new Handler(); 
    final Runnable rrandomizer = new Runnable() { 
     public void run() { 

      RelativeLayout.LayoutParams params = new 
           LayoutParams(LayoutParams.WRAP_CONTENT, 
           LayoutParams.WRAP_CONTENT); 
      params.topMargin = (int)(Math.random()*2000 + 1); 
      params.leftMargin = (int)(Math.random()*3000 + 1); 

      mImage.setLayoutParams(params); 

      randomizer.postDelayed(this, 5000); 
     } 
    }; 
    rrandomizer.run(); 

    mImage.setOnClickListener(new View.OnClickListener() { 
     int numClicks = 0; 

     @Override 
     public void onClick(View arg0) { 
      numClicks++; 
      if(numClicks > 5) { 

       Bitmap bitmap = 
            BitmapFactory.decodeResource(getResources(), 
            R.drawable.ic_launcher);  
       ByteArrayOutputStream baos = new 
                ByteArrayOutputStream(); 
       bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); 
       byte[] b = baos.toByteArray(); 

       Intent intent = new Intent(MainActivity.this, 
                  SecondActivity.class); 
       intent.putExtra("picture", b); 

       } 
      } 

     }); 
} 

};

編輯：從logcat的

錯誤按下按鈕後：

10-18 14:17:32.529: E/InputDispatcher(17677): Event_report_payload: Failed to write keypress event to kernel, error = 5 
10-18 14:17:32.529: E/dhcpcd(7483): open_udp_socket: No such device 
10-18 14:17:32.549: E/dhcpcd(7483): open_socket: No such file or directory 
10-18 14:17:32.549: E/dhcpcd(7483): send_raw_packet: No such file or directory 
10-18 14:17:32.609: E/InputDispatcher(17677): Event_report_payload: Failed to write keypress event to kernel, error = 5 
10-18 14:17:32.759: E/AndroidRuntime(26780): Uncaught handler: thread main exiting due to uncaught exception 
10-18 14:17:32.759: E/Monkey(26780): exception :java.io.FileNotFoundException: /dev/kmsg (Permission denied) 
10-18 14:17:32.809: E/AndroidRuntime(26780): exception :java.io.FileNotFoundException: /dev/kmsg (Permission denied) 
10-18 14:17:32.809: E/AndroidRuntime(26780): FATAL EXCEPTION: main 
10-18 14:17:32.809: E/AndroidRuntime(26780): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.SecondActivity}: java.lang.NullPointerException 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1664) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1680) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:945) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.os.Handler.dispatchMessage(Handler.java:99) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.os.Looper.loop(Looper.java:130) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.app.ActivityThread.main(ActivityThread.java:3719) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at java.lang.reflect.Method.invokeNative(Native Method) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at java.lang.reflect.Method.invoke(Method.java:507) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:653) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at dalvik.system.NativeStart.main(Native Method) 
10-18 14:17:32.809: E/AndroidRuntime(26780): Caused by: java.lang.NullPointerException 
10-18 14:17:32.809: E/AndroidRuntime(26780): at com.example.inkuesttest.SecondActivity.onCreate(SecondActivity.java:18) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
10-18 14:17:32.809: E/AndroidRuntime(26780): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1628) 
10-18 14:17:32.809: E/AndroidRuntime(26780): ... 11 more 
10-18 14:17:32.829: E/AndroidRuntime(26780): exception :java.io.FileNotFoundException: /dev/kmsg (Permission denied) 
10-18 14:17:32.869: E/ActivityManager(17677): set systemprop back to original value~ 

編輯：

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_second); 

    Bundle extras = getIntent().getExtras(); 
//line18 
    byte[] b = extras.getByteArray("picture"); 
//end line18 

    Bitmap bmp = BitmapFactory.decodeByteArray(b, 0, b.length); 
    ImageView image = (ImageView) findViewById(R.id.imageView1); 

    image.setImageBitmap(bmp); 
} 
} 

Answer 1

你的問題是，你正在試圖訪問extras在Intent但你沒有通過任何。你在下面Intent這就是爲什麼一個工程

intent.putExtra("picture", b); 

但你不要在你的其他onClick()做到這一點。你要麼請確保您發送extras或者是安全做null檢查你的SecondActivity有類似

Bundle extras = getIntent().getExtras(); 
    //line18 
    if (getIntent().getExtras() != null) 
    { 
     byte[] b = extras.getByteArray("picture"); 
    } 

然後，當然，你將需要處理下面的線，如果它是null。

編輯

如果兩個Button旨意一般做同樣的事情，那麼你可以See this answer使用兩個相同的方法。然後你只需要switch, View使用不同的代碼取決於被點擊的代碼。像

@Override 
    public void onClick(View v) { // arg0 is an ugly name for a param so I changed it to v 
     switch (v.getId()) 
     { 
      case (R.id.Floaterimg): 
       // do stuff if this image is clicked; 
       break; 
      case (R.id.journbtn): 
       // do stuff if this image is clicked; 
       break; 
     } 
} 

東西然後把通用代碼，如您Intent外switch聲明。