点击后颜色可以变暗的imageview
import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff.Mode;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;
/**
* @Description: 实现图像根据按下抬起动作变化颜色
*/
public class ColorFilterImageView extends ImageView implements OnTouchListener {
public ColorFilterImageView(Context context) {
this(context, null, 0);
}
public ColorFilterImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ColorFilterImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
setOnTouchListener(this);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: // 按下时图像变灰
setColorFilter(Color.GRAY, Mode.MULTIPLY);
break;
case MotionEvent.ACTION_UP: // 手指离开或取消操作时恢复原色
case MotionEvent.ACTION_CANCEL:
setColorFilter(Color.TRANSPARENT);
break;
default:
break;
}
return false;
}
}
