I'm following this example :
package com.mtsahakis.mediaprojectiondemo; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.graphics.PixelFormat; import android.graphics.Point; import android.hardware.display.DisplayManager; import android.hardware.display.VirtualDisplay; import android.media.Image; import android.media.ImageReader; import android.media.projection.MediaProjection; import android.media.projection.MediaProjectionManager; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import android.util.DisplayMetrics; import android.util.Log; import android.view.Display; import android.view.OrientationEventListener; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.nio.ByteBuffer; public class ScreenCaptureImageActivity extends Activity { private static final String TAG = ScreenCaptureImageActivity.class.getName(); private static final int REQUEST_CODE = 100; private static String STORE_DIRECTORY; private static int IMAGES_PRODUCED; private static final String SCREENCAP_NAME = "screencap"; private static final int VIRTUAL_DISPLAY_FLAGS = DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY | DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC; private static MediaProjection sMediaProjection; private MediaProjectionManager mProjectionManager; private ImageReader mImageReader; private Handler mHandler; private Display mDisplay; private VirtualDisplay mVirtualDisplay; private int mDensity; private int mWidth; private int mHeight; private int mRotation; private OrientationChangeCallback mOrientationChangeCallback; private class ImageAvailableListener implements ImageReader.OnImageAvailableListener { @Override public void onImageAvailable(ImageReader reader) { Image image = null; FileOutputStream fos = null; Bitmap bitmap = null; try { image = mImageReader.acquireLatestImage(); if (image != null) { Image.Plane[] planes = image.getPlanes(); ByteBuffer buffer = planes[0].getBuffer(); int pixelStride = planes[0].getPixelStride(); int rowStride = planes[0].getRowStride(); int rowPadding = rowStride - pixelStride * mWidth; // create bitmap bitmap = Bitmap.createBitmap(mWidth + rowPadding / pixelStride, mHeight, Bitmap.Config.ARGB_8888); bitmap.copyPixelsFromBuffer(buffer); // write bitmap to a file fos = new FileOutputStream(STORE_DIRECTORY + "/myscreen_" + IMAGES_PRODUCED + ".png"); bitmap.compress(CompressFormat.JPEG, 100, fos); IMAGES_PRODUCED++; Log.e(TAG, "captured image: " + IMAGES_PRODUCED); } } catch (Exception e) { e.printStackTrace(); } finally { if (fos!=null) { try { fos.close(); } catch (IOException ioe) { ioe.printStackTrace(); } } if (bitmap!=null) { bitmap.recycle(); } if (image!=null) { image.close(); } } } } private class OrientationChangeCallback extends OrientationEventListener { public OrientationChangeCallback(Context context) { super(context); } @Override public void onOrientationChanged(int orientation) { synchronized (this) { final int rotation = mDisplay.getRotation(); if (rotation != mRotation) { mRotation = rotation; try { // clean up if(mVirtualDisplay != null) mVirtualDisplay.release(); if(mImageReader != null) mImageReader.setOnImageAvailableListener(null, null); // re-create virtual display depending on device width / height createVirtualDisplay(); } catch (Exception e) { e.printStackTrace(); } } } } } private class MediaProjectionStopCallback extends MediaProjection.Callback { @Override public void onStop() { Log.e("ScreenCapture", "stopping projection."); mHandler.post(new Runnable() { @Override public void run() { if(mVirtualDisplay != null) mVirtualDisplay.release(); if(mImageReader != null) mImageReader.setOnImageAvailableListener(null, null); if(mOrientationChangeCallback != null) mOrientationChangeCallback.disable(); sMediaProjection.unregisterCallback(MediaProjectionStopCallback.this); } }); } } /****************************************** Activity Lifecycle methods ************************/ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // call for the projection manager mProjectionManager = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE); // start projection Button startButton = (Button)findViewById(R.id.startButton); startButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { startProjection(); } }); // stop projection Button stopButton = (Button)findViewById(R.id.stopButton); stopButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { stopProjection(); } }); // start capture handling thread new Thread() { @Override public void run() { Looper.prepare(); mHandler = new Handler(); Looper.loop(); } }.start(); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_CODE) { sMediaProjection = mProjectionManager.getMediaProjection(resultCode, data); if (sMediaProjection != null) { File externalFilesDir = getExternalFilesDir(null); if (externalFilesDir != null) { STORE_DIRECTORY = externalFilesDir.getAbsolutePath() + "/screenshots/"; File storeDirectory = new File(STORE_DIRECTORY); if (!storeDirectory.exists()) { boolean success = storeDirectory.mkdirs(); if (!success) { Log.e(TAG, "failed to create file storage directory."); return; } } } else { Log.e(TAG, "failed to create file storage directory, getExternalFilesDir is null."); return; } // display metrics DisplayMetrics metrics = getResources().getDisplayMetrics(); mDensity = metrics.densityDpi; mDisplay = getWindowManager().getDefaultDisplay(); // create virtual display depending on device width / height createVirtualDisplay(); // register orientation change callback mOrientationChangeCallback = new OrientationChangeCallback(this); if (mOrientationChangeCallback.canDetectOrientation()) { mOrientationChangeCallback.enable(); } // register media projection stop callback sMediaProjection.registerCallback(new MediaProjectionStopCallback(), mHandler); } } } /****************************************** UI Widget Callbacks *******************************/ private void startProjection() { startActivityForResult(mProjectionManager.createScreenCaptureIntent(), REQUEST_CODE); } private void stopProjection() { mHandler.post(new Runnable() { @Override public void run() { if (sMediaProjection != null) { sMediaProjection.stop(); } } }); } /****************************************** Factoring Virtual Display creation ****************/ private void createVirtualDisplay() { // get width and height Point size = new Point(); mDisplay.getSize(size); mWidth = size.x; mHeight = size.y; // start capture reader mImageReader = ImageReader.newInstance(mWidth, mHeight, PixelFormat.RGBA_8888, 2); mVirtualDisplay = sMediaProjection.createVirtualDisplay(SCREENCAP_NAME, mWidth, mHeight, mDensity, VIRTUAL_DISPLAY_FLAGS, mImageReader.getSurface(), null, mHandler); mImageReader.setOnImageAvailableListener(new ImageAvailableListener(), mHandler); } } to take a screenshot on Android ver >=21.
The problem with that example is that once I take the screenshot , there are black edges on the top , right & bottom of the Image.
I can't see where is the problem since the given Width and Height to both the VirtualDisplay and the Bitmap are correct, what I'm missing here?