I can not find any package to stream what the user is doing out of the application with react native.
I am creating my own plugin
The goal is to send a stream from java to javascript to then send it an external socket server via socket.io
This is my java class to ask authorization and stream
import android.hardware.display.DisplayManager;
import android.util.DisplayMetrics;
import android.app.Activity;
import android.content.Intent;
import android.media.projection.MediaProjectionManager;
import android.media.projection.MediaProjection;
import android.media.MediaRecorder;
import android.util.Log;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ActivityEventListener;
import com.facebook.react.bridge.BaseActivityEventListener;
import static android.content.Context.MEDIA_PROJECTION_SERVICE;
public class ScreenMirroringModule extends ReactContextBaseJavaModule {
private static final int SCREEN_SHARE_REQUEST = 4242;
private static final String S_MIRROR_CANCELLED = "S_MIRROR_CANCELLED";
private Promise sMirrorPromise;
private MediaProjectionManager mMediaProjectionManager;
private MediaStreamer mMediaStreamer = new MediaStreamer();
private final ActivityEventListener mActivityEventListener = new BaseActivityEventListener() {
@Override
public void onActivityResult(Activity activity, int requestCode, int resultCode, Intent intent) {
if (requestCode == SCREEN_SHARE_REQUEST) {
if (sMirrorPromise != null) {
if (resultCode == Activity.RESULT_CANCELED) {
sMirrorPromise.reject(S_MIRROR_CANCELLED, "Screen mirroring was cancelled");
} else if (resultCode == Activity.RESULT_OK) {
DisplayMetrics dm = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
mMediaStreamer.reset();
mMediaStreamer.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mMediaStreamer.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mMediaStreamer.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
mMediaStreamer.setVideoSize(dm.widthPixels, dm.heightPixels);
mMediaStreamer.setVideoFrameRate(30);
StreamTask st = new StreamTask();
st.execute(mMediaStreamer);
try {
st.get();
} catch (Exception e) {
sMirrorPromise.reject(e);
}
MediaProjection mMediaProjection = mMediaProjectionManager.getMediaProjection(resultCode, intent);
try {
mMediaProjection.createVirtualDisplay("MainActivity",
dm.widthPixels, dm.heightPixels, dm.densityDpi,
DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
mMediaStreamer.getSurface(), null /*Callbacks*/, null/*Handler*/);
mMediaStreamer.start();
} catch (Exception e) {
//Log.v("ReactNative", Log.getStackTraceString(e));
sMirrorPromise.reject(e);
}
sMirrorPromise.resolve("Test");
}
}
sMirrorPromise = null;
}
}
};
public ScreenMirroringModule(ReactApplicationContext reactContext) {
super(reactContext);
// Add the listener for `onActivityResult`
reactContext.addActivityEventListener(mActivityEventListener);
}
@Override
public String getName() {
return "ScreenMirroring";
}
@ReactMethod
public void stream(String ip, int port, Promise promise) {
final Activity activity = getCurrentActivity();
// Store the promise to resolve/reject when picker returns data
sMirrorPromise = promise;
mMediaProjectionManager = (MediaProjectionManager) activity.getSystemService(MEDIA_PROJECTION_SERVICE);
Intent intent = mMediaProjectionManager.createScreenCaptureIntent();
activity.startActivityForResult(intent, SCREEN_SHARE_REQUEST);
}
}
This is my class which is transforming the recording into a stream
package com.ijkoareactapp;
import android.media.MediaRecorder;
import android.net.LocalServerSocket;
import android.net.LocalSocket;
import android.net.LocalSocketAddress;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
public class MediaStreamer extends MediaRecorder {
private LocalServerSocket localServerSocket = null;
private LocalSocket receiver, sender = null;
public void prepare() throws IllegalStateException, IOException {
receiver = new LocalSocket();
try {
localServerSocket = new LocalServerSocket("screen_mirror_socket");
receiver.connect(new LocalSocketAddress("screen_mirror_socket"));
receiver.setReceiveBufferSize(4096);
receiver.setSendBufferSize(4096);
sender = localServerSocket.accept();
sender.setReceiveBufferSize(4096);
sender.setSendBufferSize(4096);
} catch (Exception e) {
throw new IOException("Can't create local socket !");
}
setOutputFile(sender.getFileDescriptor());
try {
super.prepare();
} catch (Exception e) {
Log.v("ReactNative", Log.getStackTraceString(e));
closeSockets();
throw e;
}
}
public InputStream getInputStream() {
InputStream out = null;
try {
out = receiver.getInputStream();
} catch (IOException e) {
}
return out;
}
public void stop() {
closeSockets();
super.stop();
}
private void closeSockets() {
if (localServerSocket != null) {
try {
localServerSocket.close();
sender.close();
receiver.close();
} catch (IOException e) {
}
localServerSocket = null;
sender = null;
receiver = null;
}
}
}
And this is the class which is running the task in background because I can not start a local socket in main process
package com.ijkoareactapp;
import android.os.AsyncTask;
import android.util.Log;
public class StreamTask extends AsyncTask <MediaStreamer, Integer, Long>{
protected Long doInBackground(MediaStreamer... mediaStreamers) {
Log.v("ReactNative", "Start");
for(int i = 0; i < mediaStreamers.length; i++) {
try {
mediaStreamers[i].prepare();
Log.v("ReactNative", "Prepared");
} catch (Exception e) {
Log.v("ReactNative", "Error");
Log.v("ReactNative", Log.getStackTraceString(e));
}
}
return null;
}
}
The error I have is
08-05 15:28:49.465 555 571 V ReactNative: java.lang.IllegalStateException
08-05 15:28:49.465 555 571 V ReactNative: at android.media.MediaRecorder._prepare(Native Method)
08-05 15:28:49.465 555 571 V ReactNative: at android.media.MediaRecorder.prepare(MediaRecorder.java:827)
08-05 15:28:49.465 555 571 V ReactNative: at com.ijkoareactapp.MediaStreamer.prepare(MediaStreamer.java:37)
08-05 15:28:49.465 555 571 V ReactNative: at com.ijkoareactapp.StreamTask.doInBackground(StreamTask.java:14)
08-05 15:28:49.465 555 571 V ReactNative: at com.ijkoareactapp.StreamTask.doInBackground(StreamTask.java:6)
08-05 15:28:49.465 555 571 V ReactNative: at android.os.AsyncTask$2.call(AsyncTask.java:304)
08-05 15:28:49.465 555 571 V ReactNative: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
08-05 15:28:49.465 555 571 V ReactNative: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:243)
08-05 15:28:49.465 555 571 V ReactNative: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
08-05 15:28:49.465 555 571 V ReactNative: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
08-05 15:28:49.465 555 571 V ReactNative: at java.lang.Thread.run(Thread.java:761)
Reading some documentation it seems that prepare is called before start or after setOutputFormat but this is not the case.
I think that my internal socket connection is not well initialized but can not find the food way to do it.
As well not sure where should I put the mMediaProjection.createVirtualDisplay, at the moment I have the follwing error should be because the prepare does not works
08-05 15:43:36.077 1575 1575 V ReactNative: java.lang.IllegalStateException: failed to get surface
08-05 15:43:36.077 1575 1575 V ReactNative: at android.media.MediaRecorder.getSurface(Native Method)
08-05 15:43:36.077 1575 1575 V ReactNative: at com.ijkoareactapp.ScreenMirroringModule$1.onActivityResult(ScreenMirroringModule.java:65)
08-05 15:43:36.077 1575 1575 V ReactNative: at com.facebook.react.bridge.ReactContext.onActivityResult(ReactContext.java:262)
08-05 15:43:36.077 1575 1575 V ReactNative: at com.facebook.react.ReactInstanceManager.onActivityResult(ReactInstanceManager.java:703)
08-05 15:43:36.077 1575 1575 V ReactNative: at com.facebook.react.ReactActivityDelegate.onActivityResult(ReactActivityDelegate.java:124)
08-05 15:43:36.077 1575 1575 V ReactNative: at com.facebook.react.ReactActivity.onActivityResult(ReactActivity.java:75)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.app.Activity.dispatchActivityResult(Activity.java:6915)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.app.ActivityThread.deliverResults(ActivityThread.java:4049)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.app.ActivityThread.handleSendResult(ActivityThread.java:4096)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.app.ActivityThread.-wrap20(ActivityThread.java)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1516)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.os.Handler.dispatchMessage(Handler.java:102)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.os.Looper.loop(Looper.java:154)
08-05 15:43:36.077 1575 1575 V ReactNative: at android.app.ActivityThread.main(ActivityThread.java:6077)
08-05 15:43:36.077 1575 1575 V ReactNative: at java.lang.reflect.Method.invoke(Native Method)
08-05 15:43:36.077 1575 1575 V ReactNative: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
08-05 15:43:36.077 1575 1575 V ReactNative: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
from Stream screen react native using MediaRecorder
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