ランドスケープに変更するとAndroidアプリがクラッシュする

Question

アプリを開発していて、ユーザーが携帯電話を横方向または縦方向に使用できるようにしたいと思っていますが、肖像画から始めて風景に切り替えるとアプリがクラッシュします。私が風景を開始し、ポートレートに切り替えると、クラッシュすることもあります。

は、ここで私はすでにこのthisを試してみました

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
<uses-permission android:name="android.permission.CAMERA" /> 


<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme.NoActionBar" 
    android:screenOrientation="sensor"> 
    <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/> 
    <activity 
     android:name=".MainActivity" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme.NoActionBar" 
     android:configChanges="screenSize|keyboardHidden"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity android:name="net.sourceforge.zbar.android.CameraTest.CameraTestActivity" /> 
    <activity android:name="com.facebook.FacebookActivity" 
     android:configChanges= 
      "keyboard|keyboardHidden|screenLayout|screenSize|orientation" 
     android:theme="@android:style/Theme.Translucent.NoTitleBar" 
     android:label="@string/app_name" /> 
</application> 

<?xml version="1.0" encoding="utf-8"?> 

私のAndroidManifest.xml

ですが、 hereを説明した後、アプリが景観に行くことができません。ここで

は、それが（MainActivity）に墜落した活動です：

public class MainActivity extends AppCompatActivity 
    implements NavigationView.OnNavigationItemSelectedListener, LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, UserDelegate { 

private static final int SCAN_COUPONS = 1; 
public GoogleApiClient googleApiClient; 
private Location lastLocation; 
EditText zip; 
public static User user; 
public SharedPreferences sharedPreferences; 
public static SQLiteDatabase database; 

@Override 
protected void onStart() { 
    googleApiClient.connect(); 
    super.onStart(); 
} 

@Override 
protected void onStop() { 
    googleApiClient.disconnect(); 
    super.onStop(); 
} 

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

    /* 
    ActionBar actionBar = getSupportActionBar(); 
    if (actionBar != null) { 
     actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM); 
     actionBar.setCustomView(R.layout.actionbar); 
    } 
    */ 
    sharedPreferences = this.getPreferences(Context.MODE_PRIVATE); 
    database = openOrCreateDatabase("CouponWallet", MODE_PRIVATE, null); 

    /*Typeface iconFont = FontManager.getTypeface(getApplicationContext(), FontManager.FONTAWESOME); 
    FontManager.markAsIconContainer(findViewById(R.id.content_main), iconFont); 
    FontManager.markAsIconContainer(findViewById(R.id.drawer_layout), iconFont); 
    //FontManager.markAsIconContainer(findViewById(R.id.nav_drawer), iconFont); 
    FontManager.markAsIconContainer(findViewById(R.id.top_toolbar), iconFont); 
    FontManager.markAsIconContainer(findViewById(R.id.bottom_toolbar), iconFont);*/ 

    FontIconTypefaceHolder.init(getAssets(), "fonts/FontAwesome.ttf"); //allows for icons 

    // set up toolbar 
    Toolbar toolbar = (Toolbar) findViewById(R.id.top_toolbar); 
    setSupportActionBar(toolbar); 
    toolbar.setTitle("Coupon Wallet"); 
    toolbar.hideOverflowMenu(); 
    FontManager.setFont(findViewById(R.id.top_toolbar), FontManager.getTypeface(this, FontManager.CANDY)); 

    googleApiClient = new GoogleApiClient.Builder(this).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(LocationServices.API).build(); 
    Log.v("onCreate", "api client created"); 

    //set up drawer 
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    new Thread(new Runnable() { 
     @Override 
     public void run() { // does ouside of ui thread 
      setIcons(); 
     } 
    }).start(); 
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
    drawer.addDrawerListener(toggle); 
    toggle.syncState(); 

    /*if(sharedPreferences.getInt("user_id", 0) == 0){ 
     FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); 
     ft.replace(R.id.content_frame, new LoginFragment()); 
     ft.addToBackStack(null); 
     ft.commit(); 
     getSupportActionBar().setTitle("Login"); 
    }*/ 

    //user = new User(sharedPreferences.getInt("user_id", 1), database); 

    //if (Functions.isOnline()) { 
    Log.v("onCreate", "creating user " + sharedPreferences.getInt("user_id", 1)); 
    this.user = new User(1, this); 
    //} 

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

@Override 
public void onBackPressed() { 
    FragmentManager fm = getFragmentManager(); 
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    if (drawer.isDrawerOpen(GravityCompat.START)) { 
     drawer.closeDrawer(GravityCompat.START); 
    } else { 
     if (fm.getBackStackEntryCount() > 0) { 
      fm.popBackStack(); 
     } else { 
      super.onBackPressed(); 
     } 
    } 

} 

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

    LayerDrawable layerDrawable = (LayerDrawable) menu.findItem(R.id.action_barcode).getIcon(); 
    layerDrawable.setDrawableByLayerId(R.id.main_icon, Functions.getFAIcons(this).get("barcode")); 
    Functions.setBadgeCount(this, layerDrawable, 2, R.id.num_circle); 

    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    if (id == R.id.action_barcode) { 
     final AlertDialog dialog = new AlertDialog.Builder(this).setView(R.layout.redeem_code_layout).create(); 
     dialog.show(); 
     Toolbar toolbar = (Toolbar) dialog.findViewById(R.id.redeem_toolbar); 
     toolbar.inflateMenu(R.menu.redeem_menu); 
     toolbar.setTitle("Redeem Codes"); 
     toolbar.setNavigationIcon(Functions.getFAIcons(this).get("times")); 
     toolbar.setNavigationOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       dialog.dismiss(); 
      } 
     }); 
     toolbar.inflateMenu(R.menu.redeem_menu); 
     toolbar.hideOverflowMenu(); 
     toolbar.setTitleTextColor(getResources().getColor(R.color.colorBlack)); 
     FontManager.setFont(toolbar, FontManager.getTypeface(this, FontManager.CHAMPAGNE)); 
     MenuItem help = toolbar.getMenu().add("Help"); 
     help.setIcon(Functions.getFAIcons(this).get("question")); 
     help.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 
      @Override 
      public boolean onMenuItemClick(MenuItem menuItem) { 
       Toast.makeText(getApplicationContext(), "Help Clicked", Toast.LENGTH_LONG).show(); 
       return false; 
      } 
     }); 
     final ImageView code = (ImageView) dialog.findViewById(R.id.redeem_code); 
     code.setImageDrawable(user.barcode); 
     Spinner spinner = (Spinner) dialog.findViewById(R.id.redeem_scan_type); 
     ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.spinner_item, new String[]{"Barcode", "QR Code", "PDF417", "Aztec"}); 
     spinner.setAdapter(adapter); 
     spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
      @Override 
      public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
       switch (i) { 
        case 0: 
         code.setImageDrawable(user.barcode); 
         break; 
        case 1: 
         code.setImageDrawable(user.qr_code); 
         break; 
        case 2: 
         code.setImageDrawable(user.pdf417); 
         break; 
        case 3: 
         code.setImageDrawable(user.aztec); 
         break; 
       } 

       /*for(int j = 0; j < 4; j++){ 
        if (i != j) { 
         TextView item = ((TextView) adapterView.getChildAt(j)); 
         item.setBackgroundColor(getResources().getColor(R.color.colorWhite)); 
         item.setTextColor(getResources().getColor(R.color.colorGray)); 
        } else { 
         TextView item = ((TextView) adapterView.getChildAt(j)); 
         item.setBackgroundColor(getResources().getColor(R.color.colorPrimary)); 
         item.setTextColor(getResources().getColor(R.color.colorWhite)); 
        } 
       }*/ 
      } 

      @Override 
      public void onNothingSelected(AdapterView<?> adapterView) { 
       code.setImageDrawable(user.barcode); 
      } 
     }); 
     TextView textView = (TextView) dialog.findViewById(R.id.redeem_num); 
     long uid = user.id; 
     textView.setText(String.format(Locale.US, "%s%011d", "891", uid)); 
    } 

    return super.onOptionsItemSelected(item); 
} 

/** 
* @param item item selected in nav menu 
* @return if view switch was successful 
*/ 
//@SuppressWarnings("StatementWithEmptyBody") 
@Override 
public boolean onNavigationItemSelected(MenuItem item) { 
    int id = item.getItemId(); 
    Fragment fragment = null; 
    String title = ""; 
    Toolbar toolbar = (Toolbar) findViewById(R.id.bottom_toolbar); 
    toolbar.getMenu().clear(); 
    switch (id) { //based on which section was selected 
     case R.id.nav_search: 
      title = "Search"; 
      fragment = new SearchFragment(); 
      toolbar.setVisibility(View.VISIBLE); 
      toolbar.setNavigationIcon(Functions.getFAIcons(getApplicationContext()).get("gear")); 
      toolbar.setNavigationOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 
        Log.v("bottom_toolbar", "horizontal clicked"); 
       } 
      }); 
      toolbar.inflateMenu(R.menu.my_wallet); 
      MenuItem map1 = toolbar.getMenu().getItem(0); //only item in the menu 
      map1.setIcon(Functions.getFAIcons(getApplicationContext()).get("map")); 
      map1.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 
       @Override 
       public boolean onMenuItemClick(MenuItem menuItem) { 
        Log.v("bottom_toolbar", "map clicked"); 
        return true; 
       } 
      }); 
      break; 
     case R.id.nav_profile: 
      title = "Profile"; 
      break; 
     case R.id.nav_notifications: 
      title = "Notifications"; 
      break; 
     case R.id.nav_categories: 
      try { 
       lastLocation = getLastKnownLocation(); 
       if (lastLocation != null) { 
        Log.v("categories", "Location accessed"); 
        Bundle bundle2 = new Bundle(); 
        bundle2.putDouble("lat", lastLocation.getLatitude()); 
        bundle2.putDouble("lon", lastLocation.getLongitude()); 
        bundle2.putString("type", "loc"); 
        fragment = new CategoriesFragment(); 
        fragment.setArguments(bundle2); 
        title = "Categories"; 
        toolbar.setVisibility(View.VISIBLE); 
        toolbar.setNavigationIcon(Functions.getFAIcons(getApplicationContext()).get("gear")); 
        toolbar.setNavigationOnClickListener(new View.OnClickListener() { 
         @Override 
         public void onClick(View view) { 
          Log.v("bottom_toolbar", "horizontal clicked"); 
         } 
        }); 
        toolbar.inflateMenu(R.menu.categories); 
        break; 
       } 
      } catch (SecurityException e) { // if can't get location go straight to search 
      } 
      Log.v("categories", "Location not accessable"); 
      Toast.makeText(this, "Turn on location services get faster results", Toast.LENGTH_LONG).show(); 
      AlertDialog dialog2 = new AlertDialog.Builder(this).setView(R.layout.get_zip_dialog).setPositiveButton("Set", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialogInterface, int i) { 
        dialogInterface.dismiss(); 
       } 
      }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialogInterface, int i) { 
        dialogInterface.cancel(); 
       } 
      }).create(); 
      dialog2.setOnCancelListener(new DialogInterface.OnCancelListener() { 
       @Override 
       public void onCancel(DialogInterface dialogInterface) { 
        dialogInterface.dismiss(); 
        Toast.makeText(getApplicationContext(), "Cannot get local categories without location", Toast.LENGTH_LONG).show(); 
       } 
      }); 
      zip = (EditText) findViewById(R.id.zip_code); 
      dialog2.show(); 
      break; 
     case R.id.nav_wallet: 
      fragment = new MyWalletFragment(); //sets up view 
      // setting up toolbars 
      title = "My Wallet"; 
      toolbar.setVisibility(View.VISIBLE); 
      toolbar.setNavigationIcon(Functions.getFAIcons(getApplicationContext()).get("columns")); 
      toolbar.setNavigationOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 
        Log.v("bottom_toolbar", "horizontal clicked"); 
       } 
      }); 
      toolbar.inflateMenu(R.menu.my_wallet); 
      MenuItem map = toolbar.getMenu().getItem(0); //only item in the menu 
      map.setIcon(Functions.getFAIcons(getApplicationContext()).get("map")); 
      map.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 
       @Override 
       public boolean onMenuItemClick(MenuItem menuItem) { 
        Log.v("bottom_toolbar", "map clicked"); 
        return true; 
       } 
      }); 

      //toolbar.setLogo(R.id.horizontal); 
      break; 
     case R.id.nav_scan: 
      title = "Scan Coupons"; 
      Intent intent = new Intent(this, CameraTestActivity.class); 
      startActivityForResult(intent, SCAN_COUPONS); 
      break; 
     case R.id.nav_map: 
      title = "Map"; 
      break; 
     case R.id.nav_settings: 
      fragment = new SettingFragment(); //sets up view 
      title = "Settings"; 
      break; 
     case R.id.nav_help: 
      title = "Help"; 
      // Assuming the Help in the nav bar is the same as the settings menu 
      fragment = new HelpSettingsFragment(); 
      break; 
    } 

    if (fragment != null) { 
     FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); 
     ft.replace(R.id.content_frame, fragment); 
     ft.addToBackStack(null); 
     ft.commit(); 
    } 

    FontManager.setFont(findViewById(R.id.content_frame), FontManager.getTypeface(this, FontManager.CHAMPAGNE)); 

    //noinspection ConstantConditions 
    getSupportActionBar().setTitle(title); 

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

@Override 
public void onLocationChanged(Location location) { 
    Log.v("onLocationChanged", "Location changed"); 
    lastLocation = location; 
} 

@Override 
public void onConnected(@Nullable Bundle bundle) { 
    Log.v("onConnected", "connected"); 
    try { 
     lastLocation = LocationServices.FusedLocationApi.getLastLocation(googleApiClient); 
    } catch (SecurityException e) { 
     e.printStackTrace(); 
    } 
} 

@Override 
public void onConnectionSuspended(int i) { 

} 

@Override 
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 

} 

/** 
* Process a coupon scan 
* 
* @param requestCode Type of activity 
* @param resultCode if result ok 
* @param data  the returned data 
*/ 
@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (resultCode == RESULT_CANCELED) { 
     Log.e("onActivityResult", "result canceled"); 
    } else if (resultCode == RESULT_OK) { 
     if (requestCode == SCAN_COUPONS) { 
      String result = data.getStringExtra("result"); 
      Toast.makeText(this, result, Toast.LENGTH_LONG).show(); 
      Log.v("onActivityResult", result); 
     } 
    } 
} 

/** 
* Set the icons in the drawer 
*/ 
private void setIcons() { 
    Map<String, Drawable> map = Functions.getFAIcons(getApplicationContext()); 
    int[] sections = {R.id.nav_search, R.id.nav_profile, R.id.nav_notifications, R.id.nav_categories, R.id.nav_wallet, 
      R.id.nav_scan, R.id.nav_map, R.id.nav_settings, R.id.nav_help}; 
    Drawable[] icons = {map.get("search"), map.get("user"), map.get("bookmark"), map.get("list"), map.get("barcode"), 
      map.get("camera"), map.get("map_o"), map.get("gear"), map.get("question")}; 
    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
    Menu m = navigationView.getMenu(); 
    for (int i = 0; i < sections.length; i++) { 
     MenuItem item = m.findItem(sections[i]); 
     item.setIcon(icons[i]); 
    } 
} 

/** 
* Gets the last known Location 
* 
* @return The last known location 
* @throws SecurityException if proper permissions not given 
*/ 
private Location getLastKnownLocation() throws SecurityException { 
    LocationManager mLocationManager = (LocationManager) getApplicationContext().getSystemService(LOCATION_SERVICE); 
    List<String> providers = mLocationManager.getProviders(true); 
    Location bestLocation = null; 
    Log.v("getLastKnownLocation", "looping through providers"); 
    for (String provider : providers) { 
     Log.v("getLastKnownLocation", provider); 
     Location l = mLocationManager.getLastKnownLocation(provider); 
     if (l == null) { 
      continue; 
     } 
     if (bestLocation == null || l.getAccuracy() < bestLocation.getAccuracy()) { 
      // Found best last known location: %s", l); 
      bestLocation = l; 
     } 
    } 
    return bestLocation; 
} 

public void settingOnClick(View v) { 

    /* 
    NotificationCompat.Builder mBuilder = 
      new NotificationCompat.Builder(this) 
        .setSmallIcon(R.drawable.logo_shortcut) 
        .setContentTitle("My notification") 
        .setContentText("Hello World!"); 

    Intent resultIntent = new Intent(this, MainActivity.class); 

    // Because clicking the notification opens a new ("special") activity, there's 
    // no need to create an artificial back stack. 
    PendingIntent resultPendingIntent = 
      PendingIntent.getActivity(
        this, 
        0, 
        resultIntent, 
        PendingIntent.FLAG_UPDATE_CURRENT 
      ); 
    mBuilder.setContentIntent(resultPendingIntent); 

    // Sets an ID for the notification 
    int mNotificationId = 001; 
    // Gets an instance of the NotificationManager service 
    NotificationManager mNotifyMgr = 
      (NotificationManager) getSystemService(NOTIFICATION_SERVICE); 
    // Builds the notification and issues it. 
    mBuilder.setAutoCancel(true); 
    mNotifyMgr.notify(mNotificationId, mBuilder.build()); 
    */ 


    Fragment fragment = null; 
    switch (v.getId()) { 
     case R.id.setting_account: 
     case R.id.setting_userIcon: 
      fragment = new AccountSettingsFragment(); 
      break; 
     case R.id.setting_location: 
     case R.id.setting_locationArrow: 
      fragment = new LocationSettingsFragment(); 
      break; 
     case R.id.setting_notifications: 
     case R.id.setting_notificationIcon: 
      fragment = new NotificationSettingsFragment(); 
      break; 
     case R.id.setting_help: 
     case R.id.setting_helpIcon: 
      fragment = new HelpSettingsFragment(); 
      break; 
     case R.id.setting_contact: 
     case R.id.setting_contactIcon: 
      fragment = new ContactUsSettingsFragment(); 
      break; 
     case R.id.setting_privacy: 
     case R.id.setting_privacyIcon: 
      fragment = new PrivacyPolicySettingsFragment(); 
      break; 
     case R.id.setting_about: 
     case R.id.setting_aboutIcon: 
      fragment = new AboutSettingsFragment(); 
      break; 
     case R.id.tutorial_loc_enterAnotherLocation: 
      fragment = new EnterAnotherLocation(); 
      break; 
     case R.id.tutorial_1_saving: 
     case R.id.tutorial_2_saving: 
     case R.id.tutorial_3_saving: 
      fragment = new FirstTimeLocation(); 
      break; 
    } 
    if (fragment != null) { 
     FragmentTransaction ft = getSupportFragmentManager().beginTransaction().setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); 
     ft.replace(R.id.content_frame, fragment); 
     ft.addToBackStack(null); 
     ft.commit(); 
    } 
} 


@Override 
public void userFinished(User user) { 
    this.user = user; 
    Log.v("UserFinished", user.toString()); 
} 
} 

と私は取得エラーがhereです。これは、文字制限を超える質問をするため、.txtファイルへのリンクです。

Answer 1

斐伊川風景やポートレートモードでの作業のために、あなたが保存されたインスタンスを使用し、保存されたインスタンスを復元するために持っているか、他のアプリケーションが googleApiClient、lastLocation、ジップ値、ユーザーの値がnull値を持つことができ、この問題に

@Override 
public void onSaveInstanceState(Bundle savedInstanceState) { 
    super.onSaveInstanceState(savedInstanceState); 
    // Save UI state changes to the savedInstanceState. 
    // This bundle will be passed to onCreate if the process is 
    // killed and restarted. 
    savedInstanceState.putBoolean("MyBoolean", true); 
    savedInstanceState.putDouble("myDouble", 1.9); 
    savedInstanceState.putInt("MyInt", 1); 
    savedInstanceState.putString("MyString", "Welcome back to Android"); 
    savedInstanceState.putParcelable("parcelable", ""); 
    savedInstanceState.putSerializable("serializable", ""); 
} 

を引き起こし

バンドルは本質的にNVP（名前 - 値ペア）マップを格納する方法であり、onCreate（）とonRestoreInstanceState（）のように値を抽出する場所に渡されます。

@Override 
public void onRestoreInstanceState(Bundle savedInstanceState) { 
    super.onRestoreInstanceState(savedInstanceState); 
    // Restore UI state from the savedInstanceState. 
    // This bundle has also been passed to onCreate. 
    boolean myBoolean = savedInstanceState.getBoolean("MyBoolean"); 
    double myDouble = savedInstanceState.getDouble("myDouble"); 
    int myInt = savedInstanceState.getInt("MyInt"); 
    String myString = savedInstanceState.getString("MyString"); 
}