Android：Alertbuilder在運行時改變顏色

Question

我得到了一個帶有EditText和Seekbar的Alretdialog。通過使用Seekbar，我想更改我的edittext的背景顏色。
更改seekbar顏色有效，但不能更改edittext背景顏色。

EditText newSubjectEdit; 
    SeekBar colorSeeker; 
    Builder subjectAlert; 
    LinearLayout lg; 
private Builder getNewSubjectAlert() { 
      subjectAlert = new AlertDialog.Builder(this); 

      lg = new LinearLayout(getApplicationContext()); 
      ... 

      newSubjectEdit = new EditText(getApplicationContext()); 
      ... 
      lg.addView(newSubjectEdit); 

      colorSeeker = new SeekBar(getApplicationContext()); 
colorSeeker.setOnSeekBarChangeListener(seekBarChangeListener); 
      ... 
      lg.addView(colorSeeker); 

      subjectAlert.setView(lg);   
      // set ok and cancel ... 

聽衆：

 SeekBar.OnSeekBarChangeListener seekBarChangeListener = new OnSeekBarChangeListener() { 

      @Override 
      public void onStopTrackingTouch(SeekBar seekBar) { 
       // TODO Auto-generated method stub 

      } 

      @Override 
      public void onStartTrackingTouch(SeekBar seekBar) { 
       // TODO Auto-generated method stub 

      } 

      @Override 
      public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
       seekBar.setBackgroundColor(color); // works !! 
       newSubjectEdit.setBackgroundColor(color); // doesn't work 
      } 
     }; 

希望你明白我的意思是......

Answer 1

ifound prob.as你必須添加一個名爲視圖dynamicalle.newSubjectEdit超過once.so它被覆蓋。和seekbar seekbar.OnSeekBarChangeListener爲您提供seekbar作爲arg。這是參考。所以它給出了正確的對象