Android 图片的平移和镜面和倒影效果

// 新建一个bitmap
Bitmap alterBitmap = Bitmap.createBitmap(bitmap1.getWidth() * 2,
                bitmap1.getHeight() * 2, bitmap1.getConfig());

matrix.setScale(-1, 1);
matrix.postTranslate(bitmap1.getWidth(), 0);

//倒影效果
matrix.setScale(1, -1);
matrix.postTranslate(0, bitmap1.getHeight());
        

package com.wuyudong.resize;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.view.Menu;
import android.widget.ImageView;

public class MainActivity extends Activity {

    private ImageView iv1;
    private ImageView iv2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        iv1 = (ImageView) findViewById(R.id.iv_1);
        iv2 = (ImageView) findViewById(R.id.iv_2);

        // 设置第一个bitmap的图标
        Bitmap bitmap1 = BitmapFactory.decodeResource(getResources(),
                R.drawable.unlock);

        iv1.setImageBitmap(bitmap1);

        // 新建一个bitmap
        Bitmap alterBitmap = Bitmap.createBitmap(bitmap1.getWidth() * 2,
                bitmap1.getHeight() * 2, bitmap1.getConfig());

        // 以alterBitmap为模板新建画布
        Canvas canvas = new Canvas(alterBitmap);
        // 新建画笔并设置属性
        Paint paint = new Paint();
        paint.setColor(Color.BLACK);

        // 新建矩阵并设置缩放值
        Matrix matrix = new Matrix();
        
        //镜面效果
        //matrix.setScale(-1, 1);
        //matrix.postTranslate(bitmap1.getWidth(), 0);
        
        //倒影效果
        matrix.setScale(1, -1);
        matrix.postTranslate(0, bitmap1.getHeight());
        
        //平移效果
        // matrix.setTranslate(10, 10);

        // 设置画布
        canvas.drawBitmap(bitmap1, matrix, paint);
        iv2.setImageBitmap(alterBitmap);
    }

}