Android随笔

学习api设计

接下来我们随便把墙上某个地方的颜色用颜色取色器取下，然后写一个简单的View!

PS:需要在AndroidManifest.xml中的appliction节点添加关闭硬件加速： android:hardwareAccelerated="false"

/**
 * Created by Jay on 2015/10/22 0022.
 */
public class AvoidXfermodeView1 extends View {

    private Paint mPaint;
    private Bitmap mBitmap;
    private AvoidXfermode avoidXfermode;

    public AvoidXfermodeView1(Context context) {
        super(context);
        init();
    }

    public AvoidXfermodeView1(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public AvoidXfermodeView1(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);  //抗锯齿
        avoidXfermode = new AvoidXfermode(0XFFCCD1D4, 0, AvoidXfermode.Mode.TARGET);
        mBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.iv_meizi);

    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawBitmap(mBitmap, 50, 50, mPaint);
        mPaint.setARGB(255, 222, 83, 71);
        mPaint.setXfermode(avoidXfermode);
        canvas.drawRect(50, 50, 690, 1010, mPaint);
    }
}