android截取屏幕图片

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("截屏次数:"+mPrintNum);
            }
        });
    }
    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()+"/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();
        }
    }

       /**
        * 获取SDCard的目录路径功能
        * @return
        */
    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();
    }
}
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
&n

补充：移动开发 , Android ,