android - 如何在 Android 中设置音频均衡器

Question

我正在制作一个媒体播放器，其中需要使用“seek bar”设置均衡器效果为“Bass”、“terrible”、“Rock”、“Pop”、“Medium”。我得到了一个链接，其中使用了一些 NDK 库。是否有任何 Java 库可以做到这一点，请解释一下这样做的逻辑是什么。

 @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.equalizertab);


      f
   }
  } else {
   try {
    ((GlobalState) getApplicationContext())
      .resetEQ();
   } catch (RemoteException re) {
    // TODO:
   }
  }
 }
});

在下面注销猫:

05-25 11:52:16.630: E/AndroidRuntime(19088): FATAL EXCEPTION: main
05-25 11:52:16.630: E/AndroidRuntime(19088): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.apis.media/com.example.android.apis.media.AudioFxDemoActivity}: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -1
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1818)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1834)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.app.ActivityThread.access$500(ActivityThread.java:122)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1027)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.os.Looper.loop(Looper.java:132)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.app.ActivityThread.main(ActivityThread.java:4126)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at java.lang.reflect.Method.invokeNative(Native Method)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at java.lang.reflect.Method.invoke(Method.java:491)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at dalvik.system.NativeStart.main(Native Method)
05-25 11:52:16.630: E/AndroidRuntime(19088): Caused by: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -1
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.media.audiofx.Visualizer.<init>(Visualizer.java:182)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at com.example.android.apis.media.AudioFxDemoActivity.setupVisualizerFxAndUI(AudioFxDemoActivity.java:151)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at com.example.android.apis.media.AudioFxDemoActivity.onCreate(AudioFxDemoActivity.java:53)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1050)
05-25 11:52:16.630: E/AndroidRuntime(19088):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1782)

Answer 1

您可以在 AudioFxDemo 类中找到均衡器。

这是您可以找到锻炼权限的链接:

Android Visualizer implementation crash