截取手机屏幕成图片保存到sdcard卡当中

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
android:id="@+id/print_btn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="截屏" />

</LinearLayout>
由于是把截屏的图片存放到sd卡里,所以要在manifest.xml文件中增加对sd卡的写入权限.

 

转自：http://my.oschina.net/u/246578/blog/77263