Android App weißer Bildschirm blockiert ohne Fehler

Question

Ich habe meine Android-App mit einer Schublade Navigationsmenü eingerichtet und nach all dem Einrichten meiner App zeigt nur einen weißen leeren Bildschirm ohne meine LAUNCHER Aktivität und ohne nichts zu tun.

Ich weiß, ist ziemlich veraltet, aber ich kann nicht herausfinden, was schief läuft, auch weil ich keine Log-Fehler habe .. ich denke, ist ein Problem des Themings, ich werde einige Code unten posten.

Danke für die Hilfe.

Dies ist, was die App zeigt:

Theme.xml

<style name="AppTheme.Base" parent="Theme.AppCompat.Light.NoActionBar"> 
    <item name="drawerArrowStyle">@style/DrawerArrowStyle</item> 
</style> 

<style name="AppTheme.CAFTracker" parent="AppTheme.Base"> 
    <!-- Customize your theme here. --> 
    <item name="colorPrimary">@color/colorPrimary</item> 
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item> 
    <item name="android:windowBackground" >@color/white</item> 

    <item name="colorAccent">@color/colorAccent</item> 
    <item name="android:textColorPrimary">@color/colorPrimary</item> 
    <item name="android:textColor">@color/colorPrimary</item> 

    <item name="windowActionBar">false</item> 
    <item name="windowNoTitle">true</item> 


    <item name="elevation">0dp</item> 
</style> 

<style name="ActionBarText" parent="ThemeOverlay.AppCompat.ActionBar"> 
    <item name="android:textSize">20dp</item> 
    <item name="android:textColorPrimary">@android:color/white</item> 
</style> 

<style name="DrawerArrowStyle" parent="Widget.AppCompat.DrawerArrowToggle"> 
    <item name="spinBars">true</item> 
    <item name="color">@android:color/white</item> 
</style> 

AndroidManifest.xml

<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme.CAFTracker"> 

    <activity 
     android:name=".gui.activity.HomeActivity" 
     android:label="@string/app_name"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application> 

ActivityDefault.xml

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:id="@+id/screen_default_drawer_layout" 
android:layout_width="match_parent" 
android:layout_height="match_parent"> 

<LinearLayout 
    android:id="@+id/screen_default_content_main" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical"> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"> 

     <android.support.v7.widget.Toolbar 
      android:id="@+id/screenToolbar" 
      style="@style/toolbar" 
      tools:context=".ToolBar" /> 

    </RelativeLayout> 

    <FrameLayout 
     android:id="@+id/screen_default_container" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     tools:context=".FrameLayout" /> 

</LinearLayout> 

<android.support.design.widget.NavigationView 
    android:id="@+id/navigationMenu" 
    android:layout_width="wrap_content" 
    android:layout_height="match_parent" 
    android:layout_gravity="start" 
    android:fitsSystemWindows="true" 
    app:headerLayout="@layout/nav_header_main" 
    app:menu="@menu/activity_main_drawer" /> 

Hause Aktivität

public class HomeActivity extends Base { 


public static Intent getHomeActivity(Context context){ 
    return new Intent(context, HomeActivity.class); 
} 

@Override 
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) { 
    super.onCreate(savedInstanceState, persistentState); 

    if (savedInstanceState == null) { 
     getSupportFragmentManager() 
       .beginTransaction() 
       .add(R.id.screen_default_container, HomeFragment.newInstance(), AppConfig.FRAGMENT_HOME) 
       .commit(); 
    } 
} 

@Override 
protected int getContentView() { 
    return R.layout.activity_default; 
} 

@Override 
protected int getTitleToolBar() { 
    return R.string.homeSectionName; 
} 

}

BaseActivity

public abstract class Base extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { 

@Bind(R.id.navigationMenu) 
NavigationView mNavigationView; 

@Bind(R.id.screen_default_drawer_layout) 
DrawerLayout mDrawerLayout; 

@Bind(R.id.screenToolbar) 
protected Toolbar mToolBar; 

@Override 
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) { 
    super.onCreate(savedInstanceState, persistentState); 

    setContentView(getContentView()); 

    ButterKnife.bind(this); 

    CAFTrackerApplication.get(getApplicationContext()).inject(this); 
} 

@Override 
protected void onStart() { 
    super.onStart(); 

    if (mNavigationView != null) { 
     mNavigationView.setNavigationItemSelectedListener(this); 

     for (int menuItemPos = 0; menuItemPos < mNavigationView.getMenu().size(); menuItemPos++) { 
      if (mNavigationView.getMenu().getItem(menuItemPos).getItemId() 
        == Prefs.getIntPreference(getApplicationContext(), R.string.pref_ui_menu_selected)) { 

       mNavigationView.getMenu().getItem(menuItemPos).setChecked(true); 
       break; 
      } 
     } 
    } 

    loadInfoToolbar(); 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    switch (item.getItemId()) { 
     case android.R.id.home: 
      if (mDrawerLayout != null) { 
       mDrawerLayout.openDrawer(GravityCompat.START); 
      } 
      return true; 
    } 
    return super.onOptionsItemSelected(item); 
} 

public void loadInfoToolbar() { 
    setSupportActionBar(mToolBar); 

    try { 
     if (getSupportActionBar() != null) { 
      getSupportActionBar().setDisplayShowTitleEnabled(true); 
      getSupportActionBar().setHomeButtonEnabled(true); 
      getSupportActionBar().setShowHideAnimationEnabled(true); 
      getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
//    getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_menu_white_24dp); 
      getSupportActionBar().setTitle(getTitleToolBar()); 

     } 
    } catch (NullPointerException e) { 
     Logger.e("Support action bar is null"); 
    } 
} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    ButterKnife.unbind(this); 
} 

@Override 
public boolean onNavigationItemSelected(MenuItem menuItem) { 

    Logger.i("Position clicked [ " + menuItem.getItemId() + " ]"); 

    Prefs.savePreference(getApplicationContext(), R.string.pref_ui_menu_selected, menuItem.getItemId()); 

    //Closing drawer on item click 
    if (mDrawerLayout != null) { 
     mDrawerLayout.closeDrawers(); 
    } 

    switch (menuItem.getItemId()) { 
     // Sub Sections 
     case R.id.nav_home: 
      startActivity(HomeActivity.getHomeActivity(getApplicationContext())); 
      return true; 
    } 

    return false; 
} 


protected abstract int getContentView(); 

protected abstract int getTitleToolBar(); 
} 

Answer 1

Änderung

@Override 
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) { 
    super.onCreate(savedInstanceState, persistentState); 

    if (savedInstanceState == null) { 
     getSupportFragmentManager() 
       .beginTransaction() 
       .add(R.id.screen_default_container, HomeFragment.newInstance(), AppConfig.FRAGMENT_HOME) 
       .commit(); 
    } 
} 

zu

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

    if (savedInstanceState == null) { 
     getSupportFragmentManager() 
       .beginTransaction() 
       .add(R.id.screen_default_container, HomeFragment.newInstance(), AppConfig.FRAGMENT_HOME) 
       .commit(); 
    } 
}