In Android the screen capture implementation method of the current Activity is obtained by view

This method USES view to get screen shots of the current activity, not framebuffer, so it has a certain limitation. But this approach is relatively simple and easy to understand.

First get the screen capture in Bitmap format with the following function:

public Bitmap myShot(Activity activity) {

//  To obtain windows At the top of the pyramid view

View view = activity.getWindow().getDecorView();

view.buildDrawingCache();

//  Gets the status bar height 

Rect rect = new Rect();

view.getWindowVisibleDisplayFrame(rect);

int statusBarHeights = rect.top;

Display display = activity.getWindowManager().getDefaultDisplay();

//  Gets the screen width and height 

int widths = display.getWidth();

int heights = display.getHeight();

//  Allows the current window to hold cache information 

view.setDrawingCacheEnabled(true);

//  Remove the status bar 

Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache(), 0,

statusBarHeights, widths, heights  �  statusBarHeights);

//  Destroy cache information 

view.destroyDrawingCache();

return bmp;

}

Once you have an image in bitmap format, you can either save it to an sd card or display it directly to ImageView as follows:

//  will bitmap Converted to drawable

BitmapDrawable bd=new BitmapDrawable(myShot());

imageView.setBackgroundDrawable(bd);

imageView.setImageBitmap(myShot());

If you want to write to sd to save, you can use the following method:

private void saveToSD(Bitmap bmp, String dirName,String fileName) throws IOException {

//  judge sd Whether the card exists 

if (Environment.getExternalStorageState().equals(

Environment.MEDIA_MOUNTED)) {

File dir = new File(dirName);

//  Determines whether a folder exists or not 

if(!dir.exists()){

dir.mkdir();

}

File file = new File(dirName + fileName);

//  Determines whether the file exists or not, or creates it 

if (!file.exists()) {

file.createNewFile();

}

FileOutputStream fos = null;

try {

fos = new FileOutputStream(file);

if (fos != null) {

//  The first 1 The parameter is the image format, number 2 One is picture quality, no 3 One is the output stream 

bmp.compress(Bitmap.CompressFormat.PNG, 100, fos);

//  Use up close 

fos.flush();

fos.close();

}

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

dirName as output folder name, filaName is the output file name, both of the path of the output, such as "/ mnt/sdcard/pictures/shot png". Also note that register write permissions with AndroidManifest:

<uses-permission android:name= " android.permission.WRITE_EXTERNAL_STORAGE "  />