Elternaktivität immer beim Start der Kinderaktivität zerstört

Question

Ich habe ein Problem, das mich wirklich verrückt macht. Die Elternaktivität in der Entwicklung, die ich entwickle, wird immer zerstört, sobald eines der Kinder gestartet wird. Dadurch wird die Zurück-Schaltfläche verwendet, da die Anwendung verzögert wird, da die übergeordnete Aktivität erneut erstellt werden muss. Heres Android manifest.xml:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.dev.dita.daystarmemo"> 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.CAMERA" /> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" /> 
    <uses-permission android:name="android.permission.WAKE_LOCK" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 

    <permission 
     android:name="com.dev.dita.daystarmemo.permission.C2D_MESSAGE" 
     android:protectionLevel="signature" /> 

    <uses-permission android:name="com.dev.dita.daystarmemo.permission.C2D_MESSAGE" /> 

    <application 
     android:name=".MemoApp" 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_memo_launcher" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="com.google.android.gms.version" 
      android:value="@integer/google_play_services_version" /> 

     <meta-data 
      android:name="io.fabric.ApiKey" 
      android:value="e76f495714db69684d45e3cb181116b8c21b649e" /> 

     <activity 
      android:name=".ui.welcome.WelcomeActivity" 
      android:label="@string/title_activity_welcome" 
      android:theme="@style/AppTheme.NoActionBar" /> 
     <activity 
      android:name=".ui.main.MainActivity" 
      android:label="@string/title_activity_main" 
      android:launchMode="singleTask" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <intent-filter android:label="@string/app_name"> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity 
      android:name=".ui.profile.ProfileActivity" 
      android:label="@string/title_activity_profile" 
      android:parentActivityName=".ui.main.MainActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.main.MainActivity" /> 
     </activity> 
     <activity 
      android:name=".ui.memos.MemosChatActivity" 
      android:label="@string/title_activity_memos_chat" 
      android:parentActivityName=".ui.memos.MemoGroupActivity" 
      android:theme="@style/AppTheme.NoActionBar" 
      android:windowSoftInputMode="stateHidden|adjustResize"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.memos.MemoGroupActivity" /> 
     </activity> 
     <activity 
      android:name=".ui.memos.NewMemoActivity" 
      android:label="@string/title_activity_new_memo" 
      android:theme="@style/AppTheme.NoActionBar" 
      android:windowSoftInputMode="stateAlwaysVisible|adjustResize" /> 
     <activity 
      android:name=".ui.connections.ConnectionsActivity" 
      android:label="@string/title_activity_connections" 
      android:launchMode="singleTop" 
      android:parentActivityName=".ui.main.MainActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.main.MainActivity" /> 
     </activity> 
     <activity 
      android:name=".ui.connections.NewConnectionActivity" 
      android:label="@string/title_activity_new_connection" 
      android:parentActivityName=".ui.connections.ConnectionsActivity" 
      android:theme="@style/AppTheme.NoActionBar" 
      android:windowSoftInputMode="stateHidden|adjustResize"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.connections.ConnectionsActivity" /> 
     </activity> 
     <activity 
      android:name=".ui.connections.ConnectionDetailsActivity" 
      android:label="@string/title_activity_connection_details" 
      android:parentActivityName=".ui.connections.ConnectionsActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.connections.ConnectionsActivity" /> 
     </activity> 
     <activity 
      android:name=".ui.settings.SettingsActivity" 
      android:label="@string/title_activity_settings" 
      android:parentActivityName=".ui.main.MainActivity"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.main.MainActivity" /> 
     </activity> 

     <receiver 
      android:name=".receivers.NotificationRemovedReceiver" 
      android:enabled="true" 
      android:exported="true"> 
      <intent-filter> 
       <action android:name="com.dev.dita.daystarmemo.BROADCAST_NOTIFICATION_REMOVED" /> 
      </intent-filter> 
     </receiver> 
     <receiver 
      android:name=".receivers.PushReceiver" 
      android:enabled="true" 
      android:exported="true"> 
      <intent-filter android:priority="0"> 
       <action android:name="com.dev.dita.daystarmemo.BROADCAST_NOTIFICATION" /> 
      </intent-filter> 
     </receiver> 
     <receiver 
      android:name="com.google.android.gms.gcm.GcmReceiver" 
      android:exported="true" 
      android:permission="com.google.android.c2dm.permission.SEND"> 
      <intent-filter> 
       <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 

       <category android:name="com.dev.dita.daystarmemo" /> 
      </intent-filter> 
     </receiver> 

     <service 
      android:name=".services.GcmService" 
      android:enabled="true" 
      android:exported="false"> 
      <intent-filter> 
       <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
      </intent-filter> 
     </service> 
     <service 
      android:name=".services.MemoService" 
      android:exported="false" /> 
     <service 
      android:name=".services.PushReceiverIntentService" 
      android:exported="false" /> 
     <service 
      android:name=".services.PushIntentService" 
      android:exported="false" /> 
     <service 
      android:name=".services.MemoPendingDownloadService" 
      android:exported="false" /> 
     <service 
      android:name=".services.ConnectionService" 
      android:enabled="true" 
      android:exported="false" /> 
     <service 
      android:name=".services.RegistrationService" 
      android:exported="false" /> 

     <activity 
      android:name=".ui.documents.DocumentsActivity" 
      android:label="@string/title_activity_documents" 
      android:parentActivityName=".ui.main.MainActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.main.MainActivity" /> 
     </activity> 

     <service 
      android:name=".services.TransfersService" 
      android:enabled="true" 
      android:exported="false" /> 

     <activity 
      android:name=".ui.memos.MemoGroupActivity" 
      android:label="@string/title_activity_memo_group" 
      android:parentActivityName=".ui.main.MainActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.main.MainActivity" /> 
     </activity> 
     <activity android:name=".ui.SearchableActivity"> 
      <intent-filter> 
       <action android:name="android.intent.action.SEARCH" /> 
      </intent-filter> 

      <meta-data 
       android:name="android.app.searchable" 
       android:resource="@xml/searchable" /> 
     </activity> 
     <activity 
      android:name=".ui.schedule.ScheduleActivity" 
      android:label="@string/title_activity_schedule" 
      android:parentActivityName=".ui.main.MainActivity" 
      android:theme="@style/AppTheme.NoActionBar"> 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value="com.dev.dita.daystarmemo.ui.main.MainActivity" /> 
     </activity> 

     <service 
      android:name=".services.ScheduleService" 
      android:enabled="true" 
      android:exported="false"></service> 
    </application> 

</manifest> 

Meine Implementierung zurück Knopf ist ähnlich der des Google IO 2015 App. Ich benutze keine Flaggen, wenn ich irgendeine Aktivität starte, also denke ich nicht, dass das das Problem ist. Diese

ist, wie ich die Aktivitäten starten:

private void goToNavDrawerItem(int item) { 
     Intent intent; 
     switch (item) { 
      case NAVDRAWER_ITEM_HOME: 
       startActivity(new Intent(this, MainActivity.class)); 
       break; 
      case NAVDRAWER_ITEM_MEMOS: 
       intent = new Intent(this, MemoGroupActivity.class); 
       intent.putExtra("section", MemoGroupActivity.MEMO); 
       createBackStack(intent); 
       break; 
      case NAVDRAWER_ITEM_GROUPS: 
       intent = new Intent(this, MemoGroupActivity.class); 
       intent.putExtra("section", MemoGroupActivity.GROUP); 
       createBackStack(intent); 
       break; 
      case NAVDRAWER_ITEM_CONNECTIONS: 
       createBackStack(new Intent(this, ConnectionsActivity.class)); 
       break; 
      case NAVDRAWER_ITEM_SCHEDULE: 
       createBackStack(new Intent(this, ScheduleActivity.class)); 
       break; 
      case NAVDRAWER_ITEM_DOCUMENTS: 
       createBackStack(new Intent(this, DocumentsActivity.class)); 
       break; 
      case NAVDRAWER_ITEM_SETTINGS: 
       createBackStack(new Intent(this, SettingsActivity.class)); 
       break; 
      case NAVDRAWER_ITEM_LOGOUT: 
       showLogoutDialog(); 
       break; 
     } 
    } 

Heres das schaffen zurück Stapel Methode

private void createBackStack(Intent intent) { 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { 
      TaskStackBuilder builder = TaskStackBuilder.create(this); 
      builder.addNextIntentWithParentStack(intent); 
      builder.startActivities(); 
     } else { 
      startActivity(intent); 
      finish(); 
     } 
    } 

Answer 1

Bitte überprüfen Sie, ob Sie die „Bewahren Sie keine Aktivitäten“ aktiviert haben Option unter Einstellungen> Entwickleroptionen. Wenn es aktiviert ist, werden alle Aktivitäten zerstört, wenn neue gestartet werden.