【Android】Android实现截取当前屏幕图片并保存至SDCard .

功能

1. 实现截取当前屏幕的功能。

2. 把截取的图片保存到SDCard中的某个目录文件夹下面。

 

Java代码

 

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1. package com.app.test01;  
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.View;  
13. import android.view.View.OnClickListener;  
14. import android.view.WindowManager;  
15. import android.widget.Button;  
16. import android.widget.Toast;  
17.   
18. public class JieTu extends Activity {  
19.     private Button btnButton;  
20.   
21.     @Override  
22.     protected void onCreate(Bundle savedInstanceState) {  
23.         // TODO Auto-generated method stub   
24.         super.onCreate(savedInstanceState);  
25.         setContentView(R.layout.jietu);  
26.         btnButton = (Button) findViewById(R.id.button1);  
27.         btnButton.setOnClickListener(new OnClickListener() {  
28.             @Override  
29.             public void onClick(View v) {  
30.                 // TODO Auto-generated method stub   
31.                 GetandSaveCurrentImage();  
32.             }  
33.         });  
34.     }  
35.   
36.     /** 
37.      * 获取和保存当前屏幕的截图 
38.      */  
39.     private void GetandSaveCurrentImage() {  
40.         // 1.构建Bitmap   
41.         WindowManager windowManager = getWindowManager();  
42.         Display display = windowManager.getDefaultDisplay();  
43.         int w = display.getWidth();  
44.         int h = display.getHeight();  
45.         Bitmap Bmp = Bitmap.createBitmap(w, h, Config.ARGB_8888);  
46.         // 2.获取屏幕   
47.         View decorview = this.getWindow().getDecorView();  
48.         decorview.setDrawingCacheEnabled(true);  
49.         Bmp = decorview.getDrawingCache();  
50.         String SavePath = getSDCardPath() + "/AndyDemo/ScreenImage";  
51.         // 3.保存Bitmap   
52.         try {  
53.             File path = new File(SavePath);  
54.             // 文件   
55.             String filepath = SavePath + "/Screen_1.png";  
56.             File file = new File(filepath);  
57.             if (!path.exists()) {  
58.                 path.mkdirs();  
59.             }  
60.             if (!file.exists()) {  
61.                 file.createNewFile();  
62.             }  
63.             FileOutputStream fos = null;  
64.             fos = new FileOutputStream(file);  
65.             if (null != fos) {  
66.                 Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos);  
67.                 fos.flush();  
68.                 fos.close();  
69.                 Toast.makeText(this, "截屏文件已保存至SDCard/AndyDemo/ScreenImage/下",  
70.                         Toast.LENGTH_LONG).show();  
71.             }  
72.   
73.         } catch (Exception e) {  
74.             e.printStackTrace();  
75.         }  
76.     }  
77.   
78.     /** 
79.      * 获取SDCard的目录路径功能 
80.      */  
81.     private String getSDCardPath() {  
82.         File sdcardDir = null;  
83.         // 判断SDCard是否存在   
84.         boolean sdcardExist = Environment.getExternalStorageState().equals(  
85.                 android.os.Environment.MEDIA_MOUNTED);  
86.         if (sdcardExist) {  
87.             sdcardDir = Environment.getExternalStorageDirectory();  
88.         }  
89.         return sdcardDir.toString();  
90.     }  
91. }  

package com.app.test01;

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.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;

public class JieTu extends Activity {
	private Button btnButton;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.jietu);
		btnButton = (Button) findViewById(R.id.button1);
		btnButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				GetandSaveCurrentImage();
			}
		});
	}

	/**
	 * 获取和保存当前屏幕的截图
	 */
	private void GetandSaveCurrentImage() {
		// 1.构建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.获取屏幕
		View decorview = this.getWindow().getDecorView();
		decorview.setDrawingCacheEnabled(true);
		Bmp = decorview.getDrawingCache();
		String SavePath = getSDCardPath() + "/AndyDemo/ScreenImage";
		// 3.保存Bitmap
		try {
			File path = new File(SavePath);
			// 文件
			String filepath = SavePath + "/Screen_1.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/AndyDemo/ScreenImage/下",
						Toast.LENGTH_LONG).show();
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 获取SDCard的目录路径功能
	 */
	private String getSDCardPath() {
		File sdcardDir = null;
		// 判断SDCard是否存在
		boolean sdcardExist = Environment.getExternalStorageState().equals(
				android.os.Environment.MEDIA_MOUNTED);
		if (sdcardExist) {
			sdcardDir = Environment.getExternalStorageDirectory();
		}
		return sdcardDir.toString();
	}
}

 

添加读写权限

由于要对SDCard进行操作，所以别忘记了在manifest.xml文件中赋以对SDCard的读写权限：

 

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

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