android截取屏幕圖片

package com.iceman.printscreen; 
 
import java.io.File; 
import java.io.FileOutputStream; 
 
import android.app.Activity; 
import android.graphics.Bitmap; 
import android.graphics.Bitmap.Config; 
import android.os.Bundle; 
import android.os.Environment; 
import android.view.Display; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.WindowManager; 
import android.widget.Button; 
import android.widget.LinearLayout; 
import android.widget.Toast; 
 
public class PrintScreenDemoActivity extends Activity { 
    private Button mButton; 
    private LinearLayout mLayout; 
    private int mPrintNum; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        LayoutInflater inf = this.getLayoutInflater(); 
        mLayout = (LinearLayout)inf.inflate(R.layout.main, null); 
        setContentView(mLayout); 
        mButton = (Button)findViewById(R.id.print_btn); 
        mButton.setOnClickListener(new OnClickListener() { 
            public void onClick(View v) { 
                GetandSaveCurrentImage(); 
                mPrintNum++; 
                mButton.setText("截屏次數:"+mPrintNum); 
            } 
        }); 
    } 
    private void GetandSaveCurrentImage()    
    {    
        //1.構建Bitmap    
        WindowManager windowManager = getWindowManager();    
        Display display = windowManager.getDefaultDisplay();    
        int w = display.getWidth();    
        int h = display.getHeight();    
            
        Bitmap Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 );        
            
        //2.獲取屏幕    
        View decorview = this.getWindow().getDecorView();   
        decorview.setDrawingCacheEnabled(true);     
        Bmp = decorview.getDrawingCache();     
        String SavePath = getSDCardPath()+"/PrintScreenDemo/ScreenImage";  
        
        //3.保存Bitmap     
        try {    
            File path = new File(SavePath);    
            //文件    
            String filepath = SavePath + "/Screen_"+mPrintNum+".png";    
            File file = new File(filepath);    
            if(!path.exists()){    
                path.mkdirs();    
            }    
            if (!file.exists()) {    
                file.createNewFile();    
            }    
                
            FileOutputStream fos = null;    
            fos = new FileOutputStream(file);    
            if (null != fos) {    
                Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos);    
                fos.flush();    
                fos.close();      
                    
                Toast.makeText(this, "截屏文件已保存至SDCard/PrintScreenDemo/ScreenImage/下", Toast.LENGTH_LONG).show();    
            }    
        
        } catch (Exception e) {    
            e.printStackTrace();    
        }    
    }    
      
       /**  
        * 獲取SDCard的目錄路徑功能  
        * @return  
        */  
    private String getSDCardPath(){  
        File sdcardDir = null;  
        //判斷SDCard是否存在  
        boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);  
        if(sdcardExist){  
            sdcardDir = Environment.getExternalStorageDirectory();  
        }  
         
        return sdcardDir.toString();  
    }  
} 

 代碼如下:

1. package com.iceman.printscreen;  
2.   
3. import java.io.File;  
4. import java.io.FileOutputStream;  
5.   
6. import android.app.Activity;  
7. import android.graphics.Bitmap;  
8. import android.graphics.Bitmap.Config;  
9. import android.os.Bundle;  
10. import android.os.Environment;  
11. import android.view.Display;  
12. import android.view.LayoutInflater;  
13. import android.view.View;  
14. import android.view.View.OnClickListener;  
15. import android.view.WindowManager;  
16. import android.widget.Button;  
17. import android.widget.LinearLayout;  
18. import android.widget.Toast;  
19.   
20. public class PrintScreenDemoActivity extends Activity {  
21.     private Button mButton;  
22.     private LinearLayout mLayout;  
23.     private int mPrintNum;  
24.     /** Called when the activity is first created. */  
25.     @Override  
26.     public void onCreate(Bundle savedInstanceState) {  
27.         super.onCreate(savedInstanceState);  
28.         LayoutInflater inf = this.getLayoutInflater();  
29.         mLayout = (LinearLayout)inf.inflate(R.layout.main, null);  
30.         setContentView(mLayout);  
31.         mButton = (Button)findViewById(R.id.print_btn);  
32.         mButton.setOnClickListener(new OnClickListener() {  
33.             public void onClick(View v) {  
34.                 GetandSaveCurrentImage();  
35.                 mPrintNum++;  
36.                 mButton.setText("截屏次數:"+mPrintNum);  
37.             }  
38.         });  
39.     }  
40.     private void GetandSaveCurrentImage()     
41.     {     
42.         //1.構建Bitmap     
43.         WindowManager windowManager = getWindowManager();     
44.         Display display = windowManager.getDefaultDisplay();     
45.         int w = display.getWidth();     
46.         int h = display.getHeight();     
47.              
48.         Bitmap Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 );         
49.              
50.         //2.獲取屏幕     
51.         View decorview = this.getWindow().getDecorView();    
52.         decorview.setDrawingCacheEnabled(true);      
53.         Bmp = decorview.getDrawingCache();      
54.         String SavePath = getSDCardPath()+"/PrintScreenDemo/ScreenImage";   
55.          
56.         //3.保存Bitmap      
57.         try {     
58.             File path = new File(SavePath);     
59.             //文件     
60.             String filepath = SavePath + "/Screen_"+mPrintNum+".png";     
61.             File file = new File(filepath);     
62.             if(!path.exists()){     
63.                 path.mkdirs();     
64.             }     
65.             if (!file.exists()) {     
66.                 file.createNewFile();     
67.             }     
68.                  
69.             FileOutputStream fos = null;     
70.             fos = new FileOutputStream(file);     
71.             if (null != fos) {     
72.                 Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos);     
73.                 fos.flush();     
74.                 fos.close();       
75.                      
76.                 Toast.makeText(this, "截屏文件已保存至SDCard/PrintScreenDemo/ScreenImage/下", Toast.LENGTH_LONG).show();     
77.             }     
78.          
79.         } catch (Exception e) {     
80.             e.printStackTrace();     
81.         }     
82.     }     
83.        
84.        /**  
85.         * 獲取SDCard的目錄路徑功能  
86.         * @return  
87.         */   
88.     private String getSDCardPath(){   
89.         File sdcardDir = null;   
90.         //判斷SDCard是否存在   
91.         boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);   
92.         if(sdcardExist){   
93.             sdcardDir = Environment.getExternalStorageDirectory();   
94.         }   
95.           
96.         return sdcardDir.toString();   
97.     }   
98. }  

 布局文件:

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" > 
 
    <Button 
        android:id="@+id/print_btn" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="截屏" /> 
 
</LinearLayout> 

由於是把截屏的圖片存放到sd卡裡,所以要在manifest.xml文件中增加對sd卡的寫入權限.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>