Android實現截取當前屏幕圖片并保存至SDCard

功能

1. 實現截取當前屏幕的功能。

2. 把截取的圖片保存到SDCard中的某個目錄文件夾下面。

Java代碼

    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();  
            }  
        });  
    }  

    /** 
     * 獲取和保存當前屏幕的截圖 
     */  
    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() + "/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();  
        }  
    }  

    /** 
     * 獲取SDCard的目錄路徑功能 
     */  
    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();  
    }  
}  </pre></span></h3>

添加讀寫權限


由于要對SDCard進行操作，所以別忘記了在manifest.xml文件中賦以對SDCard的讀寫權限：
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>