Error in Execute

[yagoliveira92]

I'm trying to use the plugin in my project. I put 2 files: MainApplication.java and edited AndroidManifest.xml, exatly to the written in Tutorial, but I got this error:

Built build/app/outputs/apk/debug/app-debug.apk.
Syncing files to device Android SDK built for x86...
W/info.radiobasi( 5384): Accessing hidden field Landroid/service/media/MediaBrowserService$Result;->mFlags:I (light greylist, reflection)
D/AndroidRuntime( 5384): Shutting down VM
E/AndroidRuntime( 5384): FATAL EXCEPTION: main
E/AndroidRuntime( 5384): Process: br.com.tecnocampinfo.radiobasic, PID: 5384
E/AndroidRuntime( 5384): java.lang.IllegalStateException: No pluginRegistrantCallback has been set. Make sure you call AudioServicePlugin.setPluginRegistrantCallback(this) from your application's onCreate.
E/AndroidRuntime( 5384): 	at com.ryanheise.audioservice.AudioServicePlugin$ClientHandler$3.onPlay(AudioServicePlugin.java:224)
E/AndroidRuntime( 5384): 	at com.ryanheise.audioservice.AudioService$MediaSessionCallback$1.run(AudioService.java:446)
E/AndroidRuntime( 5384): 	at com.ryanheise.audioservice.AudioService$MediaSessionCallback.play(AudioService.java:461)
E/AndroidRuntime( 5384): 	at com.ryanheise.audioservice.AudioService$MediaSessionCallback.onPlay(AudioService.java:444)
E/AndroidRuntime( 5384): 	at android.support.v4.media.session.MediaSessionCompat$Callback$StubApi21.onPlay(MediaSessionCompat.java:1259)
E/AndroidRuntime( 5384): 	at android.support.v4.media.session.MediaSessionCompatApi21$CallbackProxy.onPlay(MediaSessionCompatApi21.java:194)
E/AndroidRuntime( 5384): 	at android.media.session.MediaSession$CallbackMessageHandler.handleMessage(MediaSession.java:1486)
E/AndroidRuntime( 5384): 	at android.os.Handler.dispatchMessage(Handler.java:106)
E/AndroidRuntime( 5384): 	at android.os.Looper.loop(Looper.java:193)
E/AndroidRuntime( 5384): 	at android.app.ActivityThread.main(ActivityThread.java:6669)
E/AndroidRuntime( 5384): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 5384): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
E/AndroidRuntime( 5384): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
I/Process ( 5384): Sending signal. PID: 5384 SIG: 9
Lost connection to device.

I use the Simulator, Android 9. Who can help me? Please? =D

[ryanheise]

It sounds like you're doing everything correctly, but since you got that error message, it means there may have been a mistake somewhere. It is possible the manifest is incorrect or the MainApplication class is incorrect. Can you copy and paste both here?

[yagoliveira92]

Of course:

AndroidManifest.xml:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="br.com.tecnocampinfo.radiobasic">

    <!-- The INTERNET permission is required for development. Specifically,
         flutter needs it to communicate with the running application
         to allow setting breakpoints, to provide hot reload, etc.
    -->
    <uses-permission android:name="android.permission.WAKE_LOCK"/>

    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
         calls FlutterMain.startInitialization(this); in its onCreate method.
         In most cases you can leave this as-is, but you if you want to provide
         additional functionality it is fine to subclass or reimplement
         FlutterApplication and put your custom class here. -->
    <application
        android:name="io.flutter.app.FlutterApplication"
        android:label="radio_basic"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <!-- This keeps the window background of the activity showing
                 until Flutter renders its first frame. It can be removed if
                 there is no splash screen (such as the default splash screen
                 defined in @style/LaunchTheme). -->
            <meta-data
                android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
                android:value="true" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

        <service android:name="com.ryanheise.audioservice.AudioService">
            <intent-filter>
                <action android:name="android.media.browse.MediaBrowserService" />
            </intent-filter>
        </service>

        <receiver android:name="android.support.v4.media.session.MediaButtonReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.MEDIA_BUTTON" />
            </intent-filter>
        </receiver>

    </application>
</manifest>

MainApplication.java:

package br.com.tecnocampinfo.radiobasic;

import io.flutter.plugin.common.PluginRegistry;
import io.flutter.app.FlutterApplication;

import io.flutter.plugins.GeneratedPluginRegistrant;
import com.ryanheise.audioservice.AudioServicePlugin;

public class MainApplication extends FlutterApplication implements PluginRegistry.PluginRegistrantCallback {
  @Override
  public void onCreate() {
    super.onCreate();
    AudioServicePlugin.setPluginRegistrantCallback(this);
  }

  @Override
  public void registerWith(PluginRegistry registry) {
    GeneratedPluginRegistrant.registerWith(registry);
  }
}

[ryanheise]

Your manifest does not reference your MainApplication class.

[yagoliveira92]

Where can I reference that? Because in the Exemple have a other archive, MainActivity.

[ryanheise]

If you go to the README page and use your browser's CTRL+F hotkey to search for the keyword MainApplication, you will see on the 4th occurrence on that page.

[yagoliveira92]

Thanks my friend! But now I have a new problem:

Launching lib/main.dart on Android SDK built for x86 in debug mode...
Initializing gradle...
Resolving dependencies...
Gradle task 'assembleDebug'...
Built build/app/outputs/apk/debug/app-debug.apk.
Installing build/app/outputs/apk/app.apk...
I/flutter ( 4586): Observatory server failed to start after 1 tries
I/flutter ( 4586): Observatory server failed to start after 2 tries
E/flutter ( 4586): [ERROR:flutter/shell/common/shell.cc(184)] Dart Error: Unhandled exception:
E/flutter ( 4586): Invalid Datasource
E/flutter ( 4586): #0      _rootHandleUncaughtError.<anonymous closure> (dart:async/zone.dart:1112:29)
E/flutter ( 4586): #1      _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
E/flutter ( 4586): #2      _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
I/flutter ( 4586): Observatory server failed to start after 3 tries
I/flutter ( 4586): Observatory server failed to start after 4 tries
I/flutter ( 4586): Observatory server failed to start after 5 tries
I/flutter ( 4586): Observatory server failed to start after 6 tries
I/flutter ( 4586): Observatory server failed to start after 7 tries
I/flutter ( 4586): Observatory server failed to start after 8 tries
I/flutter ( 4586): Observatory server failed to start after 9 tries
I/flutter ( 4586): Observatory server failed to start after 10 tries
I/flutter ( 4586): Observatory server failed to start after 11 tries
I/flutter ( 4586): Could not start Observatory HTTP server:
I/flutter ( 4586): SocketException: Failed to create server socket (OS Error: Permission denied, errno = 13), address = 127.0.0.1, port = 0
I/flutter ( 4586): #0      _NativeSocket.bind (dart:io/runtime/binsocket_patch.dart:573:7)
I/flutter ( 4586): <asynchronous suspension>
I/flutter ( 4586): #1      _RawServerSocket.bind (dart:io/runtime/binsocket_patch.dart:1166:26)
I/flutter ( 4586): #2      _ServerSocket.bind (dart:io/runtime/binsocket_patch.dart:1422:29)
I/flutter ( 4586): #3      ServerSocket.bind (dart:io/runtime/binsocket_patch.dart:1413:26)
I/flutter ( 4586): #4      _HttpServer.bind (dart:_http/http_impl.dart:2524:25)
I/flutter ( 4586): #5      HttpServer.bind (dart:_http:364:19)
I/flutter ( 4586): #6      Server.startup.poll (dart:vmservice_io/server.dart:352:36)
I/flutter ( 4586): <asynchronous suspension>
I/flutter ( 4586): #7      Server.startup (dart:vmservice_io/server.dart:364:23)
I/flutter ( 4586): <asynchronous suspension>
I/flutter ( 4586): #8      main (dart:vmservice_io:253:12)
I/flutter ( 4586): 
Application finished.

Apparently the audioplayer can't connect, and try connect in my localhost. My audio server test is on. Can you help me one more time? =D

[ryanheise]

No problem. Although this latest error isn't within the audio_service plugin itself, so I'd suggest asking on https://gitter.im/flutter/flutter or https://stackoverflow.com/questions/tagged/flutter .

[MrVipinVijayan]

I am getting below error while running in Android

E/MethodChannel#ryanheise.com/audioService(10371): Failed to handle method call
E/MethodChannel#ryanheise.com/audioService(10371): java.lang.NullPointerException: Attempt to invoke virtual method 'void io.flutter.plugin.common.MethodChannel.invokeMethod(java.lang.String, java.lang.Object, io.flutter.plugin.common.MethodChannel$Result)' on a null object reference
E/MethodChannel#ryanheise.com/audioService(10371): at com.ryanheise.audioservice.AudioServicePlugin$ClientHandler.onMethodCall(AudioServicePlugin.java:530)
E/MethodChannel#ryanheise.com/audioService(10371): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:226)
E/MethodChannel#ryanheise.com/audioService(10371): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/MethodChannel#ryanheise.com/audioService(10371): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:631)
E/MethodChannel#ryanheise.com/audioService(10371): at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#ryanheise.com/audioService(10371): at android.os.MessageQueue.next(MessageQueue.java:336)
E/MethodChannel#ryanheise.com/audioService(10371): at android.os.Looper.loop(Looper.java:174)
E/MethodChannel#ryanheise.com/audioService(10371): at android.app.ActivityThread.main(ActivityThread.java:7356)
E/MethodChannel#ryanheise.com/audioService(10371): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#ryanheise.com/audioService(10371): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
E/MethodChannel#ryanheise.com/audioService(10371): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
E/flutter (10371): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(error, Attempt to invoke virtual method 'void io.flutter.plugin.common.MethodChannel.invokeMethod(java.lang.String, java.lang.Object, io.flutter.plugin.common.MethodChannel$Result)' on a null object reference, null)
E/flutter (10371): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:569:7)
E/flutter (10371): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:156:18)
E/flutter (10371):
E/flutter (10371): #2 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12)
E/flutter (10371): #3 AudioService.customAction (package:audio_service/audio_service.dart:887:27)
E/flutter (10371): #4 _AyahListScreenState._startAudioService. (package:masjid_flutter/screens/ayah_list_screen.dart:228:20)
E/flutter (10371):
E/flutter (10371): #5 _AyahListScreenState._startAudioService. (package:masjid_flutter/screens/ayah_list_screen.dart)
E/flutter (10371): #6 new Future.delayed. (dart:async/future.dart:318:39)
E/flutter (10371): #7 _rootRun (dart:async/zone.dart:1180:38)
E/flutter (10371): #8 _CustomZone.run (dart:async/zone.dart:1077:19)
E/flutter (10371): #9 _CustomZone.runGuarded (dart:async/zone.dart:979:7)
E/flutter (10371): #10 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1019:23)
E/flutter (10371): #11 _rootRun (dart:async/zone.dart:1184:13)
E/flutter (10371): #12 _CustomZone.run (dart:async/zone.dart:1077:19)
E/flutter (10371): #13 _CustomZone.bindCallback. (dart:async/zone.dart:1003:23)
E/flutter (10371): #14 Timer._createTimer. (dart:async-patch/timer_patch.dart:23:15)
E/flutter (10371): #15 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
E/flutter (10371): #16 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
E/flutter (10371): #17 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)
E/flutter (10371):

`package com.madinaapps.masjidapp;

import com.ryanheise.audioservice.AudioServicePlugin;

import io.flutter.app.FlutterApplication;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.flutter.plugins.GeneratedPluginRegistrant;
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService;

public class Application extends FlutterApplication implements PluginRegistrantCallback {
@OverRide
public void onCreate() {
super.onCreate();
AudioServicePlugin.setPluginRegistrantCallback(this);
FlutterFirebaseMessagingService.setPluginRegistrant(this);
}

@Override
public void registerWith(PluginRegistry registry) {
    GeneratedPluginRegistrant.registerWith(registry);
}

}`

and in Manifest
Added this
<receiver android:name="com.ryanheise.audioservice.MediaButtonReceiver" > <intent-filter> <action android:name="android.intent.action.MEDIA_BUTTON" /> </intent-filter> </receiver>

And referred like this

<application android:name="com.myapp.Application" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:usesCleartextTraffic="true">