Sliding animation for activity transitions

app/src/main/java/com/keylesspalace/tusky/BaseActivity.java

@@ -15,6 +15,7 @@
 
 package com.keylesspalace.tusky;
 
+import android.content.Intent;
 import android.graphics.Color;
 import android.graphics.PorterDuff;
 import android.graphics.drawable.Drawable;
@@ -38,6 +39,26 @@ public class BaseActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public void finish() {
+        super.finish();
+        overridePendingTransitionExit();
+    }
+
+    @Override
+    public void startActivity(Intent intent) {
+        super.startActivity(intent);
+        overridePendingTransitionEnter();
+    }
+
+    private void overridePendingTransitionEnter() {
+        overridePendingTransition(R.anim.slide_from_right, R.anim.slide_to_left);
+    }
+
+    private void overridePendingTransitionExit() {
+        overridePendingTransition(R.anim.slide_from_left, R.anim.slide_to_right);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         TypedValue value = new TypedValue();

app/src/main/java/com/keylesspalace/tusky/MainActivity.java

@@ -21,13 +21,17 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.os.SystemClock;
 import android.preference.PreferenceManager;
+import android.support.annotation.RequiresApi;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.TabLayout;
 import android.support.v4.view.ViewPager;
 import android.os.Bundle;
 import android.support.v7.widget.Toolbar;
+import android.transition.Slide;
+import android.transition.TransitionInflater;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;

app/src/main/java/com/keylesspalace/tusky/SFragment.java

@@ -280,6 +280,12 @@ public class SFragment extends Fragment {
         startActivity(intent);
     }
 
+    @Override
+    public void startActivity(Intent intent) {
+        super.startActivity(intent);
+        getActivity().overridePendingTransition(R.anim.slide_from_right, R.anim.slide_to_left);
+    }
+
     protected void openReportPage(String accountId, String accountUsername, String statusId,
                                   Spanned statusContent) {
         Intent intent = new Intent(getContext(), ReportActivity.class);

app/src/main/java/com/keylesspalace/tusky/ViewThreadActivity.java

@@ -35,7 +35,9 @@ public class ViewThreadActivity extends BaseActivity {
         setSupportActionBar(toolbar);
         ActionBar bar = getSupportActionBar();
         if (bar != null) {
-            bar.setTitle(R.string.title_thread);
+            bar.setTitle(null);
+            bar.setDisplayHomeAsUpEnabled(true);
+            bar.setDisplayShowHomeEnabled(true);
         }
 
         String id = getIntent().getStringExtra("id");
@@ -54,10 +56,8 @@ public class ViewThreadActivity extends BaseActivity {
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
-            case R.id.action_back: {
-                Intent intent = new Intent(this, MainActivity.class);
-                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
-                startActivity(intent);
+            case android.R.id.home: {
+                onBackPressed();
                 return true;
             }
         }

app/src/main/res/anim/slide_from_left.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="-100%p" android:toXDelta="0"
+        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
+        android:duration="300"/>
+</set>

app/src/main/res/anim/slide_from_right.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="100%p" android:toXDelta="0"
+        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
+        android:duration="300"/>
+</set>

app/src/main/res/anim/slide_to_left.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="0" android:toXDelta="-100%p"
+        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
+        android:duration="300"/>
+</set>

app/src/main/res/anim/slide_to_right.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="0" android:toXDelta="100%p"
+        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
+        android:duration="300"/>
+</set>

app/src/main/res/menu/view_thread_toolbar.xml

@@ -3,9 +3,4 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
-    <item android:id="@+id/action_back"
-        android:title="@string/action_back"
-        android:icon="@drawable/ic_back"
-        app:showAsAction="always" />
-
 </menu>

app/src/main/res/transition/activity_slide.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<slide xmlns:android="http://schemas.android.com/apk/res/"
+    android:duration="1000"/>