是否有一个AudioManager.MODE_IN_COMMUNICATION蓝牙权限互动？ [英] Is there a AudioManager.MODE_IN_COMMUNICATION Bluetooth permission interaction?

问题描述

我有一个非常简单的code线：

I have a very simple line of code:

audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);

不过，近日在4.0以上版本的设备，我看到一个崩溃是由于该行称它需要蓝牙权限。

However, recently on 4.0+ devices, I am seeing a crash due to this line saying it requires the bluetooth permission.

要更precise，我看到的错误说：

To be more precise, the error I'm seeing says:

java.lang.SecurityException: Need BLUETOOTH permission

在我setMode线。

at the line of my setMode.

我有许可权许可，但是我不认为这是如何与蓝牙互动，所以我找与否我真正需要的蓝牙权限确认对于MODE_IN_COMMUNICATION

I have the MODIFY_AUDIO_SETTINGS permission, however I do not see how this interacts with bluetooth, so I am looking for a confirmation of whether or not I truly need the BLUETOOTH permission for MODE_IN_COMMUNICATION

推荐答案

从逻辑上来看，是没有办法的 AudioManager 将使用蓝牙，因此需要 android.permission.BLUETOOTH 。

From a logical point of view, there is no way that AudioManager would use Bluetooth and thus need android.permission.BLUETOOTH.

从一个源$ C ​​$ C点， setMode（）只需要 android.permission.MODIFY_AUDIO_SETTINGS

From a source code point of view, setMode() needs only android.permission.MODIFY_AUDIO_SETTINGS:

• <一个href=\"https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/media/java/android/media/AudioManager.java\"相对=nofollow> AudioManager：1425

public void setMode(int mode) {
    IAudioService service = getService();
    try {
        service.setMode(mode, mICallBack);
    } catch (RemoteException e) {
        Log.e(TAG, "Dead object in setMode", e);
    }
}

<一个href=\"http://grep$c$c.com/file/repository.grep$c$c.com/java/ext/com.google.android/android/2.2_r1.1/android/media/AudioService.java#AudioService.setMode%28int,android.os.IBinder%29\"相对=nofollow> AudioService：703

public void setMode(int mode, IBinder cb) {
    if (!checkAudioSettingsPermission("setMode()")) {
        return;
    }

<一个href=\"http://grep$c$c.com/file/repository.grep$c$c.com/java/ext/com.google.android/android/2.2_r1.1/android/media/AudioService.java#AudioService.checkAudioSettingsPermission%28java.lang.String%29\"相对=nofollow> AudioService：1250

boolean checkAudioSettingsPermission(String method) {
    if (mContext.checkCallingOrSelfPermission("android.permission.MODIFY_AUDIO_SETTINGS")
        == PackageManager.PERMISSION_GRANTED) {
    return true;
    }
String msg = "Audio Settings Permission Denial: " + method + " from pid="
    + Binder.getCallingPid()
    + ", uid=" + Binder.getCallingUid();
    Log.w(TAG, msg);
    return false;
}

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