Android - EXCEPTION FATALE: principal, Impossible de démarrer l'activité, setAudioSource

Question

J'essaie simplement de faire une activité d'enregistrement et de lecture audio de base, mais je reçois toujours cette erreur.

Voici le code:

package com.example.wesle.noisemachine; 

import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.media.MediaPlayer; 
import android.media.MediaRecorder; 
import android.os.Environment; 
import android.widget.Toast; 
import java.io.IOException; 

public class ReceiveScreen extends AppCompatActivity { 

private Button buttonStart, buttonStop, buttonPlay; 
private MediaRecorder mediaRecorder = new MediaRecorder(); 
private String outputFile; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_receive_screen); 

      buttonStart = (Button) findViewById(R.id.buttonStart); 
      buttonStop = (Button) findViewById(R.id.buttonStop); 
      buttonPlay = (Button) findViewById(R.id.buttonPlay); 
      buttonStop.setEnabled(false); 
      buttonPlay.setEnabled(false); 
      outputFile = Environment.getExternalStorageDirectory().getAbsolutePath() + "/recording.3gp"; 
      mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
      mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
      mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
      mediaRecorder.setOutputFile(outputFile); 

      buttonStart.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 
         try { 
          mediaRecorder.prepare(); 
          mediaRecorder.start(); 
         } catch (IllegalStateException ise) { 
         System.out.println("ISE Catch"); 
        } catch (IOException ioe) { 
          System.out.println("ISE Catch"); 

         } 
         buttonStart.setEnabled(false); 
         buttonStop.setEnabled(true); 


         Toast.makeText(getApplicationContext(), "Recording started", Toast.LENGTH_LONG).show(); 


       } 
      }); 

      buttonStop.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 

         mediaRecorder.stop(); 
         mediaRecorder.release(); 

         buttonStop.setEnabled(false); 
         buttonPlay.setEnabled(true); 
         buttonStart.setEnabled(true); 

         Toast.makeText(getApplicationContext(), "Recording Completed", Toast.LENGTH_LONG).show(); 
       } 
      }); 

      buttonPlay.setOnClickListener(new View.OnClickListener() { 
         @Override 
         public void onClick(View view) { 
          MediaPlayer mediaPlayer = new MediaPlayer(); 

          try { 
           mediaPlayer.setDataSource(outputFile); 
           mediaPlayer.prepare(); 
           mediaPlayer.start(); 
          } catch (Exception e) { 
           System.out.println("E Catch"); 
          } 
          Toast.makeText(getApplicationContext(), "Recording Playing", Toast.LENGTH_LONG).show(); 
         } 
      }); 

    //Code for the back button 
    Button backbuttonR = (Button) findViewById(R.id.backbuttonR); 
    backbuttonR.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      startActivity(new Intent(ReceiveScreen.this, MainActivity.class)); 
     } 
    }); 
} 
} 

Voici l'erreur:

FATAL EXCEPTION: main Process: com.example.wesle.mathsucks, PID: 4255 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.wesle.mathsucks/com.example.wesle.noisemachine.ReceiveScreen}: java.lang.RuntimeException: setAudioSource failed. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) Caused by: java.lang.RuntimeException: setAudioSource failed. at android.media.MediaRecorder.setAudioSource(Native Method) at com.example.wesle.noisemachine.ReceiveScreen.onCreate(ReceiveScreen.java:35) at android.app.Activity.performCreate(Activity.java:6662) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)  at android.app.ActivityThread.-wrap12(ActivityThread.java)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:154)  at android.app.ActivityThread.main(ActivityThread.java:6077)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Et le manifeste:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.wesle.noisemachine"> 

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

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:roundIcon="@mipmap/ic_launcher_round" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <activity 
      android:name="com.example.wesle.noisemachine.MainActivity" 
      android:label="@string/app_name" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity android:name="com.example.wesle.noisemachine.TransmitScreen" /> 
     <activity android:name="com.example.wesle.noisemachine.ReceiveScreen"></activity> 
    </application> 

</manifest> 

Answer 1

mediaPlayer.setDataSource(String); 

échoue, refer to this pour plus d'informations.

vous pouvez donc utiliser à la place FileDescriptor

Créer une méthode

private FileDescriptor openFile(String path) 
    throws FileNotFoundException, IOException { 
File file = new File(path); 
FileOutputStream fos = new FileOutputStream(file); 
return fos.getFD(); 
} 

puis appelez

try { 
     mediaPlayer.setDataSource(openFile(outputFile)); 
    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    }