Android-如何在没有用户交互的情况下授予运行时权限？

Question

我制作了一个应用程序，用于在没有用户交互的情况下测试各种手机功能，但它在某些设备上无法运行，即使它之前运行良好。我的理论是它需要运行时权限，我是对的。当我将运行时权限放在活动中时，它运行良好。问题是它请求用户的权限，而我无法进行用户交互。有没有办法在没有用户交互的情况下授予活动权限？

我将包括一个让记录器活动起作用的活动，但取决于授予权限的用户。请帮忙！！

    public static final int RECORD_AUDIO_PERMISSION_REQUEST = 3;



    @RequiresApi(api = Build.VERSION_CODES.M)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
                /*
         * API's to launch the application when the tablet is locked or
         * display is turned off
         */
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LOCKED);
        setContentView(R.layout.activity_recorder);

        //Check to see if the device has a microphone
        PackageManager pm = getPackageManager();
        boolean micPresent = pm.hasSystemFeature(PackageManager.FEATURE_MICROPHONE);
        if (!micPresent) {
            Log.i(log_tag, "There is no microphone present in this device.");
            exit_function();
        } else {
            createTempFile(status_tag, "INPROGRESS");

            //Create the file to write the recording
            try {
                FileOutputStream fOut = openFileOutput("audio_test.3gp", MODE_WORLD_READABLE);
            } catch (IOException e) {
                e.printStackTrace();
                Log.e(log_tag, "FAILED TO CREATE THE FILE OUTPUT STREAM");
                exit_function();
            }

//            if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, RECORD_AUDIO_PERMISSION_REQUEST);

            //start_recording();
        }
    }




    //Start the Recording
    private void start_recording() {
        if (recorder != null) {
            recorder.stop();
            recorder.reset();
            recorder.release();
            recorder = null;
        }
        //Setting for the Recorder
        try {
            Log.i(log_tag, "Setting the recorder");
            //This is the path that the file will be saved
            path = getFilesDir().getAbsolutePath() + "/audio_test.3gp";
            recorder = new MediaRecorder();
            recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
            recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
            recorder.setOutputFile(path);

        } catch (Exception e) {
            Log.e(log_tag, "Recording Settings Failed");
            exit_function();
        }
        //Prepare the Recorder
        try {
            Log.i(log_tag, "Preparing the Recorder");
            recorder.prepare();
        } catch (Exception e) {
            e.printStackTrace();
            Log.e(log_tag, "Recording failed");
            exit_function();
        }

        //Start the Recorder
        try {
            Log.i(log_tag, "Starting the recorder");
            title_text = ((TextView) findViewById(R.id.textView));
            title_text.setTextColor(Color.RED);
            title_text.setText("RECORDING");
            recorder.start();

            //The recording lasts as long as he timer and then stops
            mHandler.postDelayed(new Runnable() {
                public void run() {
                    if (recorder != null) {
                        recorder.stop();
                        recorder.reset();
                        recorder.release();
                        recorder = null;
                    }
                    Log.e(log_tag, "First Delay");
                    exit_function();
                }
            }, timer);
            createTempFile(status_tag, "Complete");


        } catch (Exception e) {
            e.printStackTrace();
            Log.e(log_tag, "Recorder start failed");
            exit_function();
        }
    }
        @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case  RECORD_AUDIO_PERMISSION_REQUEST:
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    start_recording();
                } else {
                    onDestroy();
                }
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

Answer 1

正如评论中所指出的，出于明显的安全原因，普通的 Android 应用程序无法做到这一点。

通常，对于“测试各种手机功能”，我们​​不是编写应用程序，而是使用仪器测试的测试套件。在那里，您可以使用 UiAutomator 自动点击权限对话框。但是，这只会作为测试套件的一部分从 Android SDK 安装中运行。

或者，在您的情况下，将您的设置设置为targetSdkVersion23 以下，您将不需要处理运行时权限。最终，某些事情会迫使您的手牌高于targetSdkVersion此值，但您可能能够“将罐子推倒”并在未来应对该挑战。