取得当前屏幕的截图

取得当前屏幕的截图主要使用了Bitmap 类里的方法，首相取得一个bitmap 然后用取得的bitmap 去绘制一张图片然后进行保存。

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.os.Environment;
import android.util.Log;
import android.view.View;
public class ShotScreen {
    
    private static final String TAG="shotscreen";
    @SuppressWarnings("unused")
    private static Bitmap takeScreenShot(Activity activity){
        View view =activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bitmap = view.getDrawingCache();
        Rect rect = new Rect();
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
        int statusBarHeight = rect.top;
        System.out.println(statusBarHeight);
        
        int width =activity.getWindowManager().getDefaultDisplay().getWidth();
        int height =activity.getWindowManager().getDefaultDisplay().getHeight();
        
        Bitmap bitmap2 = Bitmap.createBitmap(bitmap,0,statusBarHeight, width, height - statusBarHeight);
        view.destroyDrawingCache();
        return bitmap2;
    }
    
    @SuppressWarnings("unused")
    private static void savePic(Bitmap bitmap,String filename){
        FileOutputStream fileOutputStream = null;
        try {
            fileOutputStream = new FileOutputStream(filename);
            if (fileOutputStream != null) {
                bitmap.compress(Bitmap.CompressFormat.PNG, 90, fileOutputStream);
                fileOutputStream.flush();
                fileOutputStream.close();
            }
        } catch (FileNotFoundException e) {
            Log.d(TAG, "Exception:FileNotFoundException");
            e.printStackTrace();
        } catch (IOException e) {
            Log.d(TAG, "IOException:IOException");
            e.printStackTrace();
        }
    }
    
    
    /**
     * 
     * @param a
     */
    public static void shoot(Activity a){
        if (android.os.Environment.MEDIA_MOUNTED != "mounted") {
            ShotScreen.savePic(ShotScreen.takeScreenShot(a), "/sdcard/抽样.png");   
        }else{
            ShotScreen.savePic(ShotScreen.takeScreenShot(a), "/data/data/"+a.getPackageName()+"/抽样.png");
        }
    }