Change settings transitions.

res/anim-ldrtl/slide_from_end.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="-100%"
+        android:toXDelta="0%" />
+</set>

res/anim-ldrtl/slide_from_start.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="100%"
+        android:toXDelta="0%" />
+</set>

res/anim-ldrtl/slide_to_end.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="0%"
+        android:toXDelta="-100%" />
+</set>

res/anim-ldrtl/slide_to_start.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="0%"
+        android:toXDelta="100%" />
+</set>

res/anim/slide_from_end.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="100%"
+        android:toXDelta="0%" />
+</set>

res/anim/slide_from_start.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="-100%"
+        android:toXDelta="0%" />
+</set>

res/anim/slide_to_end.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="0%"
+        android:toXDelta="100%" />
+</set>

res/anim/slide_to_start.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:anim/decelerate_interpolator">
+    <translate
+        android:duration="250"
+        android:fromXDelta="0%"
+        android:toXDelta="-100%" />
+</set>

src/org/thoughtcrime/securesms/ApplicationPreferencesActivity.java

@@ -26,12 +26,13 @@ import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Build.VERSION;
 import android.os.Bundle;
+
 import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
+import androidx.core.graphics.drawable.DrawableCompat;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentTransaction;
-import androidx.core.content.ContextCompat;
-import androidx.core.graphics.drawable.DrawableCompat;
 import androidx.preference.Preference;
 
 import org.thoughtcrime.securesms.preferences.AdvancedPreferenceFragment;
@@ -272,6 +273,9 @@ public class ApplicationPreferencesActivity extends PassphraseRequiredActionBarA
 
           FragmentManager     fragmentManager     = getActivity().getSupportFragmentManager();
           FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
+
+          fragmentTransaction.setCustomAnimations(R.anim.slide_from_end, R.anim.slide_to_start, R.anim.slide_from_start, R.anim.slide_to_end);
+
           fragmentTransaction.replace(android.R.id.content, fragment);
           fragmentTransaction.addToBackStack(null);
           fragmentTransaction.commit();

src/org/thoughtcrime/securesms/DeviceActivity.java

@@ -8,18 +8,18 @@ import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Vibrator;
-import androidx.annotation.NonNull;
 import android.text.TextUtils;
 import android.transition.TransitionInflater;
-
-import org.thoughtcrime.securesms.logging.Log;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.Button;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+
 import org.thoughtcrime.securesms.crypto.IdentityKeyUtil;
 import org.thoughtcrime.securesms.crypto.ProfileKeyUtil;
+import org.thoughtcrime.securesms.logging.Log;
 import org.thoughtcrime.securesms.permissions.Permissions;
 import org.thoughtcrime.securesms.push.AccountManagerFactory;
 import org.thoughtcrime.securesms.qr.ScanListener;
@@ -75,6 +75,16 @@ public class DeviceActivity extends PassphraseRequiredActionBarActivity
     } else {
       initFragment(android.R.id.content, deviceListFragment, dynamicLanguage.getCurrentLocale());
     }
+
+    overridePendingTransition(R.anim.slide_from_end, R.anim.slide_to_start);
+  }
+
+  @Override
+  protected void onPause() {
+    if (isFinishing()) {
+      overridePendingTransition(R.anim.slide_from_start, R.anim.slide_to_end);
+    }
+    super.onPause();
   }
 
   @Override