更改圖片來源編程

當我嘗試使用來改變圖像的來源：更改圖片來源編程

img.setBackgroundResource(R.drawable.anfex2011);

或

img.setImageResource(R.drawable.anfex2011);

我得到的錯誤：

03-15 13:56:56.215: E/AndroidRuntime(30733): FATAL EXCEPTION: main 
03-15 13:56:56.215: E/AndroidRuntime(30733): java.lang.IllegalStateException: Could not execute method of the    activity 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.view.View$1.onClick(View.java:3691) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.view.View.performClick(View.java:4211) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.widget.CompoundButton.performClick(CompoundButton.java:105) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.view.View$PerformClick.run(View.java:17267) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.os.Handler.handleCallback(Handler.java:615) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.os.Handler.dispatchMessage(Handler.java:92) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.os.Looper.loop(Looper.java:137) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.app.ActivityThread.main(ActivityThread.java:4898) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at java.lang.reflect.Method.invokeNative(Native Method) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at java.lang.reflect.Method.invoke(Method.java:511) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at dalvik.system.NativeStart.main(Native Method) 
03-15 13:56:56.215: E/AndroidRuntime(30733): Caused by: java.lang.reflect.InvocationTargetException 
03-15 13:56:56.215: E/AndroidRuntime(30733): at java.lang.reflect.Method.invokeNative(Native Method) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at java.lang.reflect.Method.invoke(Method.java:511) 
03-15 13:56:56.215: E/AndroidRuntime(30733): at android.view.View$1.onClick(View.java:3686) 
03-15 13:56:56.215: E/AndroidRuntime(30733): ... 12 more 
03-15 13:56:56.215: E/AndroidRuntime(30733): Caused by: java.lang.NullPointerException 
03-15 13:56:56.215: E/AndroidRuntime(30733): at com.TLC.aelminingsolutions.MainActivity.onClickLists(MainActivity.java:675) 
03-15 13:56:56.215: E/AndroidRuntime(30733): ... 15 more

究竟是什麼時我做錯了？

編輯： 下面是一些代碼：

 @SuppressWarnings("deprecation") 
     public void onClickLists(View v) 
    {  
     switch (v.getId()) 
     { 
    case R.id.radCoalMiningShallow : 
    { 
     ImageView img = (ImageView) findViewById(R.id.img); 
     img.setBackgroundDrawable(R.drawable.anfex2011); 
     //img.setImageDrawable(R.drawable.anfex2011); 
     break; 
    }

在此先感謝。帕特里克

來源

2013-03-15 Patrick Doyle

img初始化？ – KunalK 2013-03-15 12:07:13

你是如何初始化img的？ – Nirali 2013-03-15 12:07:50

*無法執行活動的方法*意味着你試圖以錯誤的方式改變圖像PLZ分享更多的代碼並解釋你在做什麼 – 2013-03-15 12:08:10

試試這個，形象OnTouchListener()

img.setOnTouchListener(new OnTouchListener() { 

     @Override 
     public boolean onTouch(View arg0, MotionEvent arg1) { 


      switch (arg1.getAction()) { 
       case MotionEvent.ACTION_DOWN: { 
        imgTicket.setImageResource(R.drawable.hticket); 
        break; 
       } 
       case MotionEvent.ACTION_UP: { 
        imgTicket.setImageResource(R.drawable.ticket); 
        break; 
       } 
       case MotionEvent.ACTION_CANCEL:{ 
        imgTicket.setImageResource(R.drawable.ticket); 
        break; 
       } 
       } 
       return true; 
      // TODO Auto-generated method stub 

     } 
    });

來源

2013-03-15 12:06:17

檢查編輯，讓我知道你還需要從我...謝謝:) – 2013-03-15 12:38:09

你有你的初始化ImageView的？

ImageView img = (ImageView) findViewById(R.id.ImageView1); 
img.setImageResource(R.drawable.anfex2011);

這是你的imagename - anfex2011？

來源

2013-03-15 12:12:34 Nirali

更改圖片來源編程

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