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。

废话不多说直接上代码：

1.

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");
		}
    }   

2.在main.xml 中加入一个button

	<Button
  android:id="@+id/button"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="adfasdfasdfasdfas"
  />

测试一下。