کد هایی که نوشتم کجاش مشکل داره ؟ میشه کمکم کنین؟

public class MainActivity extends BaseScannerActivity
        implements NavigationView.OnNavigationItemSelectedListener, MessageDialogFragment.MessageDialogListener,
        ZXingScannerView.ResultHandler, FormatSelectorDialogFragment.FormatSelectorDialogListener,
        CameraSelectorDialogFragment.CameraSelectorDialogListener {
    public static String ok_scan = "", rej_scanner = "";
    EditText edt_Price;


    private static final int ZXING_CAMERA_PERMISSION = 1;
    private Class<?> mClss;
    String BarCode = "0";
    private static final String FLASH_STATE = "FLASH_STATE";
    private static final String AUTO_FOCUS_STATE = "AUTO_FOCUS_STATE";
    private static final String SELECTED_FORMATS = "SELECTED_FORMATS";
    private static final String CAMERA_ID = "CAMERA_ID";
    private ZXingScannerView mScannerView;
    private boolean mFlash;
    private boolean mAutoFocus;
    private ArrayList<Integer> mSelectedIndices;
    private int mCameraId = -1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (savedInstanceState != null) {
            mFlash = savedInstanceState.getBoolean(FLASH_STATE, false);
            mAutoFocus = savedInstanceState.getBoolean(AUTO_FOCUS_STATE, true);
            mSelectedIndices = savedInstanceState.getIntegerArrayList(SELECTED_FORMATS);
            mCameraId = savedInstanceState.getInt(CAMERA_ID, -1);
        } else {
            mFlash = false;
            mAutoFocus = true;
            mSelectedIndices = null;
            mCameraId = -1;
        }


        edt_Price = (EditText) findViewById(R.id.input_Price);
        setContentView(R.layout.activity_main);
        setupToolbar();

        ViewGroup contentFrame = (ViewGroup) findViewById(R.id.content_frame);
        try {
            mScannerView = new ZXingScannerView(this);
        }
        catch (Exception e){Toast.makeText(MainActivity.this, "Exeption Called !!!", Toast.LENGTH_SHORT).show();}

        setupFormats();
        try {
            contentFrame.addView(mScannerView);

    }
        catch (Exception e){Toast.makeText(MainActivity.this, "Exeption Called !!!", Toast.LENGTH_SHORT).show();}
        EditText ok_scanner = (EditText) findViewById(R.id.ok_scanner);

        ok_scan = ok_scanner.getText().toString();

        EditText reject_scanner = (EditText) findViewById(R.id.reject_scanner);

        rej_scanner = reject_scanner.getText().toString();

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);


        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);



        findViewById(R.id.BtnPay).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Toast.makeText(MainActivity.this,R.string.redirect_pay_page, Toast.LENGTH_SHORT).show();
            }
        });


        findViewById(R.id.reject_pay).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,R.string.reject_Barcode, Toast.LENGTH_SHORT).show();
                try {

                    //   Toast.makeText(MainActivity.this,R.string.ErrorInReadBarCode, Toast.LENGTH_SHORT).show();

                    mScannerView.resumeCameraPreview(MainActivity.this);

                    EditText edts=(EditText) findViewById(R.id.input_BarCode);

                    edts.setText("".toString());

                    EditText edtp=(EditText) findViewById(R.id.input_Price);

                    edtp.setText("".toString());
                }

                catch (Exception e) {
                    Toast.makeText(MainActivity.this, "Exeption Called !!!", Toast.LENGTH_SHORT).show();
                    Intent intent=new Intent(MainActivity.this,ReLoad.class);
                    MainActivity.this.startActivity(intent);
                }
            }
        });

        CamerPerision();



    }
public  void CamerPerision()
{
    try {
        ActivityCompat.requestPermissions(MainActivity.this,
                new String[]{Manifest.permission.CAMERA},
                1);
    }
    catch (Exception e)
    {
        Toast.makeText(this,R.string.cameraSetting, Toast.LENGTH_LONG).show();
    }
}
    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case 1: {

                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    // permission was granted, yay! Do the
                    // contacts-related task you need to do.
                } else {

                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                    Toast.makeText(MainActivity.this,R.string.cameraError, Toast.LENGTH_SHORT).show();
                }
                return;
            }

            // other 'case' lines to check for other
            // permissions this app might request
        }
    }
    @Override
    public void onResume() {
        super.onResume();
    mScannerView.setResultHandler(this);
    mScannerView.startCamera(mCameraId);
   // mScannerView.setFlash(mFlash);
   // mScannerView.setAutoFocus(mAutoFocus);


    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putBoolean(FLASH_STATE, mFlash);
        outState.putBoolean(AUTO_FOCUS_STATE, mAutoFocus);
        outState.putIntegerArrayList(SELECTED_FORMATS, mSelectedIndices);
        outState.putInt(CAMERA_ID, mCameraId);
    }


    public void launchActivity(Class<?> clss) {
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
                != PackageManager.PERMISSION_GRANTED) {
            mClss = clss;
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.CAMERA}, ZXING_CAMERA_PERMISSION);
        } else {
            Intent intent = new Intent(this, clss);
            startActivity(intent);
        }
    }

    public void launchFullActivity(View v) {
        launchActivity(FullScannerActivity.class);
    }


    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.+

        MenuItem menuItem;

        if (mFlash) {
            menuItem = menu.add(Menu.NONE, R.id.menu_flash, 0, R.string.flash_on);
        } else {
            menuItem = menu.add(Menu.NONE, R.id.menu_flash, 0, R.string.flash_off);
        }
        MenuItemCompat.setShowAsAction(menuItem, MenuItem.SHOW_AS_ACTION_NEVER);


        if (mAutoFocus) {
            menuItem = menu.add(Menu.NONE, R.id.menu_auto_focus, 0, R.string.auto_focus_on);
        } else {
            menuItem = menu.add(Menu.NONE, R.id.menu_auto_focus, 0, R.string.auto_focus_off);
        }
        MenuItemCompat.setShowAsAction(menuItem, MenuItem.SHOW_AS_ACTION_NEVER);

        menuItem = menu.add(Menu.NONE, R.id.menu_formats, 0, R.string.formats);
        MenuItemCompat.setShowAsAction(menuItem, MenuItem.SHOW_AS_ACTION_NEVER);

        menuItem = menu.add(Menu.NONE, R.id.menu_camera_selector, 0, R.string.select_camera);
        MenuItemCompat.setShowAsAction(menuItem, MenuItem.SHOW_AS_ACTION_NEVER);

        return super.onCreateOptionsMenu(menu);


       /*getMenuInflater().inflate(R.menu.main, menu);
        return true;*/
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {
            case R.id.menu_flash:
                mFlash = !mFlash;
                if (mFlash) {
                    item.setTitle(R.string.flash_on);
                } else {
                    item.setTitle(R.string.flash_off);
                }
                mScannerView.setFlash(mFlash);
                return true;
            case R.id.menu_auto_focus:
                mAutoFocus = !mAutoFocus;
                if (mAutoFocus) {
                    item.setTitle(R.string.auto_focus_on);
                } else {
                    item.setTitle(R.string.auto_focus_off);
                }
                mScannerView.setAutoFocus(mAutoFocus);
                return true;
            case R.id.menu_formats:
                DialogFragment fragment = FormatSelectorDialogFragment.newInstance(this, mSelectedIndices);
                fragment.show(getSupportFragmentManager(), "format_selector");
                return true;
            case R.id.menu_camera_selector:
                mScannerView.stopCamera();
                DialogFragment cFragment = CameraSelectorDialogFragment.newInstance(this, mCameraId);
                cFragment.show(getSupportFragmentManager(), "camera_selector");
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }

    }

    @Override
    public void handleResult(Result rawResult) {
        try {
            Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), notification);
            r.play();
        } catch (Exception e) {
            Toast.makeText(MainActivity.this, "Exeption Called !!!", Toast.LENGTH_SHORT).show();

        }

        try {
            BarCode = rawResult.getText();

            EditText edt = (EditText) findViewById(R.id.input_BarCode);
            edt.setText(BarCode);
        } catch (Exception e) {
            //Show Error CanNot Enter Bar Code To Edit Text
            Toast.makeText(this,R.string.ErrorInReadBarCode, Toast.LENGTH_SHORT).show();
            mScannerView.resumeCameraPreview(this);
        }

    }

    public void showMessageDialog(String message) {
        DialogFragment fragment = MessageDialogFragment.newInstance("Scan Results", message, this);
        fragment.show(getSupportFragmentManager(), "scan_results");
    }

    public void closeMessageDialog() {
        closeDialog("scan_results");
    }

    public void closeFormatsDialog() {
        closeDialog("format_selector");
    }

    public void closeDialog(String dialogName) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        DialogFragment fragment = (DialogFragment) fragmentManager.findFragmentByTag(dialogName);
        if (fragment != null) {
            fragment.dismiss();
        }
    }

    @Override
    public void onDialogPositiveClick(DialogFragment dialog) {
        // Resume the camera
        mScannerView.resumeCameraPreview(this);
    }

    @Override
    public void onDialogNegativeClick(DialogFragment dialog) {
        // Cancle Payment
        mScannerView.resumeCameraPreview(this);
    }

    @Override
    public void onFormatsSaved(ArrayList<Integer> selectedIndices) {
        mSelectedIndices = selectedIndices;
        setupFormats();
    }

    @Override
    public void onCameraSelected(int cameraId) {

            mCameraId = cameraId;
            mScannerView.startCamera(mCameraId);
            mScannerView.setFlash(mFlash);
            mScannerView.setAutoFocus(mAutoFocus);

    }

    public void setupFormats() {
        List<BarcodeFormat> formats = new ArrayList<BarcodeFormat>();
        if (mSelectedIndices == null || mSelectedIndices.isEmpty()) {
            mSelectedIndices = new ArrayList<Integer>();
            for (int i = 0; i < ZXingScannerView.ALL_FORMATS.size(); i++) {
                mSelectedIndices.add(i);
            }
        }

        for (int index : mSelectedIndices) {
            formats.add(ZXingScannerView.ALL_FORMATS.get(index));
        }
        if (mScannerView != null) {
            mScannerView.setFormats(formats);
        }
    }

    @Override
    public void onPause() {

        super.onPause();
        mScannerView.stopCamera();
        closeMessageDialog();
        closeFormatsDialog();

    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_profile) {
            // Handle the camera action

        } else if (id == R.id.nav_money) {

        } else if (id == R.id.nav_info) {
            Intent intent=new Intent(MainActivity.this,User_Information.class);
            MainActivity.this.startActivity(intent);

        } else if (id == R.id.nav_messages) {

        } else if (id == R.id.nav_add_account) {
            Intent intent=new Intent(MainActivity.this,User_Add_Account.class);
            MainActivity.this.startActivity(intent);
        } else if (id == R.id.nav_charge_account) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }



}