使用單個圖像按下時更改按鈕的顏色

Question

我有一個九按鈕圖像的按鈕。我不想爲「按下」狀態提供另一個圖像（這是StateListDrawable要求的）。我只是想讓它在被按下時變得更「黑暗」（就像iOS按鈕一樣）。我怎樣才能做到這一點？

Answer 1

使用這樣的事情：

public class MyStateDrawable extends LayerDrawable { 

    public MyStateDrawable(Drawable[] layers) { 
     super(layers); 
    } 

    @Override 
    protected boolean onStateChange(int[] states) { 
     for (int state : states) { 
      if (state == R.attr.state_activated || state == android.R.attr.state_pressed) { 
       super.setColorFilter(0x7f000000, Mode.SRC_ATOP); 
       return true; 
      } else if(state == -android.R.attr.state_activated || state == -android.R.attr.state_pressed){ 
       super.setColorFilter(0x00000000, Mode.SRC_ATOP); 
       return true; 
      }else { 
       super.setColorFilter(null); 
      } 
     } 
     return super.onStateChange(states); 
    } 

    @Override 
    public boolean isStateful() { 
     return true; 
    } 
} 

然後

StateDrawable state = new MyStateDrawable(new Drawable[]{mDefaultDrawable}); 
view.setImageDrawable(state); 

希望這將幫助你:)