android activity screenshot how?

Question

Hello Friends i'm making a app with webview i want to take screenshot of my activity Currnetly i'm using this code for capture image

public Bitmap takeScreenshot() {
   View rootView = findViewById(android.R.id.content).getRootView();
   rootView.setDrawingCacheEnabled(true);
   return rootView.getDrawingCache();
}

And This for Save

public void saveBitmap(Bitmap bitmap) {
    File imagePath = new File(Environment.getExternalStorageDirectory() + "/screenshot.png");
    FileOutputStream fos;
    try {
        fos = new FileOutputStream(imagePath);
        bitmap.compress(CompressFormat.JPEG, 100, fos);
        fos.flush();
        fos.close();
    } catch (FileNotFoundException e) {
        Log.e("GREC", e.getMessage(), e);
    } catch (IOException e) {
        Log.e("GREC", e.getMessage(), e);
    }
}

It sometime Works and sometime not, i mean ,sometime i can see in gallery screenshot and sometime not i want to if there is any option to show captured screenshot Like whhen we press Vol+power button

Main problem is how can i show image when its taken or know if its taken or not Thanks in advance

Answer 1

This is a sample approach: save your image -> display result with dialog. And to make it available in Android Gallery, the file path should also be changed:

public void saveBitmap(Bitmap bitmap) {
File path = Environment.getExternalStoragePublicDirectory(
        Environment.DIRECTORY_PICTURES);
File imagePath = new File(path, "screenshot.png");//now gallery can see it
FileOutputStream fos;
 try {
     fos = new FileOutputStream(imagePath);
     bitmap.compress(CompressFormat.JPEG, 100, fos);
     fos.flush();
     fos.close();

     displayResult(imagePath.getAbsolutePath())// here you display your result after saving
 } catch (FileNotFoundException e) {
     Log.e("GREC", e.getMessage(), e);
 } catch (IOException e) {
     Log.e("GREC", e.getMessage(), e);
 }
}

Create another method call displayResult to see the result:

public void displayResult(String imagePath){

    //LinearLayOut Setup
    LinearLayout linearLayout= new LinearLayout(this);
    linearLayout.setOrientation(LinearLayout.VERTICAL);

    linearLayout.setLayoutParams(new LayoutParams(
            LayoutParams.MATCH_PARENT,
            LayoutParams.MATCH_PARENT));

    //ImageView Setup
    ImageView imageView = new ImageView(this);//you need control the context of Imageview

    //Diaglog setup
    final Dialog dialog = new Dialog(this);//you need control the context of this dialog
    dialog.setContentView(imageView);

   imageView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });

   //Display result
   imageView.setImageBitmap(BitmapFactory.decodeFile(imagePath));
   dialog.show();

}