1 Matrix matrix=new Matrix();
2 matrix.setValues(new float[]{
3         2,0,0,
4         0,1,0,
5         0,0,1    
6 });
7 x=2x+0y+0z;
8 y=0x+1y+0z;
9 z=0x+0y+1z; //z越大離用戶越遠

1 //matrix.setScale(sx, sy);

1 1 //matrix.setRotate(30);//旋轉30度　　　　　　　　　　　　　

1                 Paint paint = new Paint();
2                 paint.setAntiAlias(true);//在算法上 取消鋸齒

1 //設置旋轉 的橫坐標以及縱坐標
2             //    matrix.setRotate(30, bitmap.getWidth()/2, bitmap.getHeight()/2);

1   //設置透明度
2   //    matrix.setTranslate(30, 0);

1 　　　　　　　　//更改了y軸的值 這是左右 y軸的話 就改y的
2                 matrix.setValues(new float[] {
3                         -1, 0, 0,
4                         0, 1, 0,
5                         0, 0, 1
6                     });
7                 //向下移動一個圖片的高度
8                 matrix.postTranslate(bitmap.getWidth(), 0);

 1 package cn.itcast.bitmapcopy;
 2 
 3 import java.io.FileNotFoundException;
 4 
 5 import android.app.Activity;
 6 import android.content.Intent;
 7 import android.graphics.Bitmap;
 8 import android.graphics.BitmapFactory;
 9 import android.graphics.Canvas;
10 import android.graphics.Matrix;
11 import android.graphics.Paint;
12 import android.net.Uri;
13 import android.os.Bundle;
14 import android.view.View;
15 import android.widget.ImageView;
16 
17 public class DemoActivity extends Activity {
18     private ImageView iv,iv_copy;
19 
20     @Override
21     public void onCreate(Bundle savedInstanceState) {
22         super.onCreate(savedInstanceState);
23         setContentView(R.layout.main);
24         iv = (ImageView) findViewById(R.id.iv);
25         iv_copy = (ImageView) findViewById(R.id.iv_copy);
26         
27     }
28     
29     
30     public void selectImage(View view){
31         Intent intent = new Intent();
32         intent.setAction("android.intent.action.PICK");
33         intent.addCategory("android.intent.category.DEFAULT");
34         intent.setType("image/*");
35         startActivityForResult(intent, 0);
36     }
37     
38     
39     @Override
40     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
41         try {
42             if (data != null) {
43                 // 得到點擊圖片的uri
44                 Uri uri = data.getData();
45                 //原圖
46                 Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));
47                 iv.setImageBitmap(bitmap);
48                 //原圖的拷貝
49                 Bitmap alterBitmap  = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight()-30, bitmap.getConfig());
50                 //以拷貝圖片的為模板創建一個畫布
51                 Canvas canvas = new Canvas(alterBitmap);
52                 Matrix matrix = new Matrix();
53 /*                matrix.setValues(new float[] {
54                     2, 0, 0,
55                     0, 2, 0,
56                     0, 0, 1
57                 });*/
58                 //matrix.setScale(sx, sy);
59                 
60                 //matrix.setRotate(30);//旋轉30度
61 
62                 //設置旋轉 的橫坐標以及縱坐標
63             //    matrix.setRotate(30, bitmap.getWidth()/2, bitmap.getHeight()/2);
64                 //設置透明度
65             //    matrix.setTranslate(30, 0);
66                 
67                 //更改了y軸的值 
68                 matrix.setValues(new float[] {
69                         -1, 0, 0,
70                         0, 1, 0,
71                         0, 0, 1
72                     });
73                 //向下移動一個圖片的高度
74                 matrix.postTranslate(bitmap.getWidth(), 0);
75                 
76                 
77                 Paint paint = new Paint();
78                 paint.setAntiAlias(true);//在算法上 取消鋸齒
79                 canvas.drawBitmap(bitmap, matrix, paint);
80                 iv_copy.setImageBitmap(alterBitmap);
81             }
82         } catch (FileNotFoundException e) {
83             e.printStackTrace();
84         }
85         super.onActivityResult(requestCode, resultCode, data);
86     }
87 }