Android Visualizer - 3 오류

Question

나는 도처에서 문제를 찾고 있었지만 아무 도움이되지 않았습니다. 모든 것을 확인했지만 시각화가 작동하지 않습니다.

활동

package com.example.daber.testapplication; 

import android.media.AudioManager; 
import android.media.MediaPlayer; 
import android.media.audiofx.Visualizer; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 

public class MainActivity extends AppCompatActivity { 
private MediaPlayer mMediaPlayer; 

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

    private void initAudio() { 
     System.out.println("Im initializing !"); 
     setVolumeControlStream(AudioManager.STREAM_MUSIC); 
     mMediaPlayer = MediaPlayer.create(this, R.raw.test); 
     mMediaPlayer.setLooping(true); 
     mMediaPlayer.start(); 
     new Visualizer(mMediaPlayer.getAudioSessionId()); 
    } 
} 

매니페스트

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

<uses-permission android:name="android.permission.RECORD_AUDIO" /> 
<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <activity android:name=".MainActivity"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application> 

</manifest> 

File Schema

오류 코드

09-03 08:28:58.341 13452-13452/com.example.daber.testapplication   
E/AudioEffect: set(): AudioFlinger could not create effect, status: -1 
09-03 08:28:58.341 13452-13452/com.example.daber.testapplication  
E/visualizers-JNI: Visualizer initCheck failed -3 
09-03 08:28:58.341 13452-13452/com.example.daber.testapplication 
E/Visualizer-JAVA: Error code -3 when initializing Visualizer. 
09-03 08:28:58.341 13452-13452/com.example.daber.testapplication 
E/AndroidRuntime: FATAL EXCEPTION: main 

Process: com.example.daber.testapplication, PID: 13452 

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.daber.testapplication/com.example.daber.testapplication.MainActivity}: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -3 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -3 
at android.media.audiofx.Visualizer.<init>(Visualizer.java:218) 
at com.example.daber.testapplication.MainActivity.initAudio(MainActivity.java:25) 
at com.example.daber.testapplication.MainActivity.onCreate(MainActivity.java:16) 
at android.app.Activity.performCreate(Activity.java:6237) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)  
at android.app.ActivityThread.-wrap11(ActivityThread.java)  
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)  
at android.os.Handler.dispatchMessage(Handler.java:102)  
at android.os.Looper.loop(Looper.java:148)  
at android.app.ActivityThread.main(ActivityThread.java:5417)  
at java.lang.reflect.Method.invoke(Native Method)  
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  

"new Visualizer (0)"도 시도하지만 같은 오류가 발생합니다. 도움이 될 것입니다.

Answer 1

당신은에 권한을 물어 있는지 기억하게 안드로이드 6+

List<String> permissions = new ArrayList<String>(); 

private boolean askPermission() { 


    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 

     int RECORD_AUDIO = checkSelfPermission(Manifest.permission.RECORD_AUDIO); 

     if (RECORD_AUDIO != PackageManager.PERMISSION_GRANTED) { 
      permissions.add(Manifest.permission.RECORD_AUDIO); 
     } 


     if (!permissions.isEmpty()) { 
      requestPermissions(permissions.toArray(new String[permissions.size()]), 1); 
     } else 
      return false; 
    } else 
     return false; 
    return true; 

} 

@Override 
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { 
    if (requestCode == 1) { 

     boolean result = true; 
     for (int i = 0; i < permissions.length; i++) { 
      result = result && grantResults[i] == PackageManager.PERMISSION_GRANTED; 
     } 
     if (!result) { 

      Toast.makeText(this, "..", Toast.LENGTH_LONG).show(); 
      // askPermission(); 
     } else { 
     } 
    } 
    super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
}