学步园

public class MyImageView extends ImageView {

	
	    public MyImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MyImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

    public MyImageView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

	

	private StateListDrawable newSelector() {
		StateListDrawable bg = new StateListDrawable();
		Drawable normal = getDrawable();
		Drawable pressed = changeBrightnessBitmap(((BitmapDrawable) getDrawable())
				.getBitmap());
		// View.PRESSED_ENABLED_STATE_SET
		bg.addState(new int[] { android.R.attr.state_pressed,
				android.R.attr.state_enabled }, pressed);
		// View.ENABLED_STATE_SET
		bg.addState(new int[] { android.R.attr.state_enabled }, normal);
		// View.EMPTY_STATE_SET
		bg.addState(new int[] {}, normal);
		return bg;

	}

	/**
	 * 传入改变亮度前的bitmap，返回改变亮度后的bitmap
	 * 
	 * @param srcBitmap
	 * @return
	 */
	private Drawable changeBrightnessBitmap(Bitmap srcBitmap) {
		Bitmap bmp = Bitmap.createBitmap(srcBitmap.getWidth(),
				srcBitmap.getHeight(), Config.ARGB_8888);
		int brightness = 60 - 127;
		ColorMatrix cMatrix = new ColorMatrix();
		cMatrix.set(new float[] { 1, 0, 0, 0, brightness, 0, 1, 0, 0,
				brightness,// 改变亮度
				0, 0, 1, 0, brightness, 0, 0, 0, 1, 0 });
		Paint paint = new Paint();
		paint.setColorFilter(new ColorMatrixColorFilter(cMatrix));
		Canvas canvas = new Canvas(bmp);
		// 在Canvas上绘制一个Bitmap
		canvas.drawBitmap(srcBitmap, 0, 0, paint);
		return new BitmapDrawable(bmp);
	}

}

获取src资料为 getdrawable