如何向android shell用户授予android.permission.RECORD_AUDIO权限？

Question

我用android NDK构建了一些命令行工具,并在/ data/local/tmp中执行它.现在它提示我"需要android.permission.RECORD_AUDIO".它通常在AndroidManifest.xml中用于java应用程序,但如何将其授予android shell用户？

源代码如:

sp<AudioRecord> rec = new AudioRecord(AUDIO_SOURCE_MIC, 44100, AUDIO_FORMAT_PCM_16_BIT, AUDIO_CHANNEL_IN_MONO);

logcat的:

I/AudioFlinger( 3772): AudioFlinger's thread 0xf0e838c0 ready to run
W/ServiceManager( 3772): Permission failure:android.permission.RECORD_AUDIO from uid=2000 pid=-1
E/        ( 3772): Request requires android.permission.RECORD_AUDIO
E/AudioFlinger( 3772): openRecord() permission denied: recording not allowed
E/AudioRecord(14132): AudioFlinger could not create record track, status: -1
--------- beginning of crash
...

Answer 1

在Lollipop之后,Android平台正在使用实时权限.如果您的应用在Marshmallow和版本之后运行,则应在Activity中授予您的权限.

请求权限之前:

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) ==
                PackageManager.PERMISSION_GRANTED) {
            // put your code for Version>=Marshmallow
        } else {
            if (shouldShowRequestPermissionRationale(Manifest.permission.RECORD_AUDIO)) {
                Toast.makeText(this,
                        "App required access to audio", Toast.LENGTH_SHORT).show();
            }
            requestPermissions(new String[]{Manifest.permission.RECORD_AUDIO
            }, REQUEST_CAMERA_PERMISSION_RESULT);
        }

    } else {
        // put your code for Version < Marshmallow
    }

在此之后,请覆盖此方法并输入您的代码:

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

  if (requestCode == REQUEST_AUDIO_PERMISSION_RESULT) {
        if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(getApplicationContext(),
                    "Application will not have audio on record", Toast.LENGTH_SHORT).show();
        }
    }
}