mMDT5_GreenWatch/app/src/main/java/com/example/greenwatch/Permission.java

package com.example.greenwatch;

import static android.Manifest.permission.CAMERA;
import static android.Manifest.permission.RECORD_AUDIO;
import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
import static android.Manifest.permission.READ_EXTERNAL_STORAGE;

import static androidx.core.app.ActivityCompat.requestPermissions;
import static androidx.core.content.ContextCompat.checkSelfPermission;

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;



public class Permission {
    private static final int PERMISSION_REQUEST_MICRO = 1;
    private static final int PERMISSION_REQUEST_CAMERA = 2;
    private static final int PERMISSION_REQUEST_ALARM = 1234;
    private static final int PERMISSION_REQUEST_START = 1235;

    public void startRechtePruefen(Context context, Activity activity){
        boolean rechtKamera = checkSelfPermission(context, CAMERA) == PackageManager.PERMISSION_GRANTED;
        boolean rechtAudio = checkSelfPermission(context, RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
        boolean rechtSchreiben = checkSelfPermission(context, WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
        boolean rechtLesen = checkSelfPermission(context, READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;

        Log.d("Kamera Rechte", String.valueOf(rechtKamera));
        Log.d("Audio Rechte", String.valueOf(rechtAudio));
        Log.d("Schreib Rechte", String.valueOf(rechtSchreiben));
        Log.d("Lese Rechte", String.valueOf(rechtLesen));

        if(rechtKamera && rechtAudio && rechtSchreiben && rechtLesen){
            Log.d("Rechte", "erteilt");
        } else {
            startRechteAnfordern(activity);
        }
    }

    public boolean kameraRechtePruefen(Context context, Activity activity){
        boolean rechtKamera = checkSelfPermission(context, CAMERA) == PackageManager.PERMISSION_GRANTED;
        Log.d("Kamera Rechte", String.valueOf(rechtKamera));

        if(rechtKamera){
            Log.d("Kamerarechte", "erteilt");
            return true;
        } else {
            kameraRechteAnfordern(activity);
            if(checkSelfPermission(context, CAMERA) == PackageManager.PERMISSION_GRANTED){
                return true;
            } else {
                return false;
            }
        }
    }

    public boolean microRechtePruefen(Context context, Activity activity){
        boolean rechtAudio = checkSelfPermission(context, RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
        Log.d("Audio Rechte", String.valueOf(rechtAudio));

        if(rechtAudio){
            Log.d("Rechte", "erteilt");
            return true;
        } else {
            microRechteAnfordern(activity);
            if(checkSelfPermission(context, RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED){
                return true;
            } else {
                return false;
            }
        }
    }

    public boolean alarmRechtePruefen(Context context, Activity activity){
        boolean rechtKamera = checkSelfPermission(context, CAMERA) == PackageManager.PERMISSION_GRANTED;
        boolean rechtAudio = checkSelfPermission(context, RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED;
        boolean rechtSchreiben = checkSelfPermission(context, WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
        boolean rechtLesen = checkSelfPermission(context, READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;

        Log.d("Kamera Rechte", String.valueOf(rechtKamera));
        Log.d("Audio Rechte", String.valueOf(rechtAudio));
        Log.d("Schreib Rechte", String.valueOf(rechtSchreiben));
        Log.d("Lese Rechte", String.valueOf(rechtLesen));

        if(rechtKamera && rechtAudio && rechtSchreiben && rechtLesen){
            Log.d("Rechte", "erteilt");
            return true;
        } else {
            alarmRechteAnfordern(activity);
            if(checkSelfPermission(context, CAMERA) == PackageManager.PERMISSION_GRANTED
                    && checkSelfPermission(context, RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED
                    && checkSelfPermission(context, WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
                    && checkSelfPermission(context, READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED){
                return true;
            } else {
                return false;
            }
        }
    }

    public void startRechteAnfordern(Activity activity){
        ActivityCompat.requestPermissions(activity, new String[]{CAMERA, RECORD_AUDIO, WRITE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE}, PERMISSION_REQUEST_START);
    }

    public void kameraRechteAnfordern(Activity activity){
        ActivityCompat.requestPermissions(activity, new String[]{CAMERA}, PERMISSION_REQUEST_CAMERA);
    }

    public void microRechteAnfordern(Activity activity){
        ActivityCompat.requestPermissions(activity, new String[]{RECORD_AUDIO}, PERMISSION_REQUEST_MICRO);
    }

    public void alarmRechteAnfordern(Activity activity){
        ActivityCompat.requestPermissions(activity, new String[]{CAMERA, RECORD_AUDIO, WRITE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE}, PERMISSION_REQUEST_ALARM);
    }

}