设置两个onClickListeners时应用程序强制关闭

Question

下面的所有代码都按照需要工作。也就是说，直到我尝试添加第二个onClickListener到另一个图像。我试图添加的代码以及我尝试添加的代码在下面的代码中列出为注释。有人看到我在这里失踪的任何东西吗？我感觉好像这个额外的实现应该没有任何问题。

公共类MainActivity延伸活动{

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); 

       } 
      } 

     }); 
} 

};

编辑：从logcat的

错误按下按钮后：

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~ 

编辑：

@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

你的问题是，你正在试图访问extras在Intent但你没有通过任何。你在下面Intent这就是为什么一个工程

intent.putExtra("picture", b); 

但你不要在你的其他onClick()做到这一点。你要么请确保您发送extras或者是安全做null检查你的SecondActivity有类似

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

然后，当然，你将需要处理下面的线，如果它是null。

编辑

如果两个Button旨意一般做同样的事情，那么你可以See this answer使用两个相同的方法。然后你只需要switch, View使用不同的代码取决于被点击的代码。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; 
     } 
} 

东西然后把通用代码，如您Intent外switch声明。