Fixed crash on pre-Lollipop devices (API levels 20 and prior) due to trying to load attributes in drawables.

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

@@ -107,7 +107,7 @@ public class AccountActivity extends BaseActivity {
         int pageMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8,
                 getResources().getDisplayMetrics());
         viewPager.setPageMargin(pageMargin);
-        viewPager.setPageMarginDrawable(R.drawable.tab_page_margin);
+        viewPager.setPageMarginDrawable(R.drawable.tab_page_margin_dark);
         viewPager.setAdapter(adapter);
         tabLayout = (TabLayout) findViewById(R.id.tab_layout);
         tabLayout.setupWithViewPager(viewPager);

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

@@ -99,7 +99,7 @@ public class AccountFragment extends Fragment implements AccountActionListener,
         recyclerView.setLayoutManager(layoutManager);
         DividerItemDecoration divider = new DividerItemDecoration(
                 context, layoutManager.getOrientation());
-        Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider);
+        Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider_dark);
         divider.setDrawable(drawable);
         recyclerView.addItemDecoration(divider);
         scrollListener = new EndlessOnScrollListener(layoutManager) {

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

@@ -242,15 +242,6 @@ public class ComposeActivity extends BaseActivity {
         }
     }
 
-    private static int getThemeColor(Context context, int attribute) {
-        TypedValue value = new TypedValue();
-        if (context.getTheme().resolveAttribute(attribute, value, true)) {
-            return value.data;
-        } else {
-            return android.R.color.black;
-        }
-    }
-
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -270,7 +261,7 @@ public class ComposeActivity extends BaseActivity {
 
         textEditor = (EditText) findViewById(R.id.field_status);
         final TextView charactersLeft = (TextView) findViewById(R.id.characters_left);
-        final int mentionColour = getThemeColor(this, R.attr.compose_mention_color);
+        final int mentionColour = ThemeUtils.getColor(this, R.attr.compose_mention_color);
         TextWatcher textEditorWatcher = new TextWatcher() {
             @Override
             public void onTextChanged(CharSequence s, int start, int before, int count) {

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

@@ -205,10 +205,12 @@ public class LoginActivity extends BaseActivity {
         editor.putString("domain", domain);
         editor.putString("clientId", clientId);
         editor.putString("clientSecret", clientSecret);
-        editor.commit();
+        editor.apply();
     }
 
     private void onLoginSuccess(String accessToken) {
+        preferences = getSharedPreferences(
+                getString(R.string.preferences_file_key), Context.MODE_PRIVATE);
         SharedPreferences.Editor editor = preferences.edit();
         editor.putString("accessToken", accessToken);
         editor.apply();
@@ -233,6 +235,8 @@ public class LoginActivity extends BaseActivity {
                 /* During the redirect roundtrip this Activity usually dies, which wipes out the
                  * instance variables, so they have to be recovered from where they were saved in
                  * SharedPreferences. */
+                preferences = getSharedPreferences(
+                        getString(R.string.preferences_file_key), Context.MODE_PRIVATE);
                 domain = preferences.getString("domain", null);
                 clientId = preferences.getString("clientId", null);
                 clientSecret = preferences.getString("clientSecret", null);
@@ -247,6 +251,7 @@ public class LoginActivity extends BaseActivity {
                     parameters.put("grant_type", "authorization_code");
                 } catch (JSONException e) {
                     errorText.setText("Heck.");
+                    return;
                     //TODO: I don't even know how to handle this error state.
                 }
                 String endpoint = getString(R.string.endpoint_token);
@@ -256,11 +261,12 @@ public class LoginActivity extends BaseActivity {
                     new Response.Listener<JSONObject>() {
                         @Override
                         public void onResponse(JSONObject response) {
-                            String accessToken = "";
+                            String accessToken;
                             try {
                                 accessToken = response.getString("access_token");
                             } catch(JSONException e) {
                                 errorText.setText("Heck.");
+                                return;
                                 //TODO: I don't even know how to handle this error state.
                             }
                             onLoginSuccess(accessToken);

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

@@ -20,6 +20,7 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.graphics.drawable.Drawable;
 import android.os.SystemClock;
 import android.preference.PreferenceManager;
 import android.support.design.widget.TabLayout;
@@ -72,7 +73,9 @@ public class MainActivity extends BaseActivity {
         ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
         int pageMargin = getResources().getDimensionPixelSize(R.dimen.tab_page_margin);
         viewPager.setPageMargin(pageMargin);
-        viewPager.setPageMarginDrawable(R.drawable.tab_page_margin);
+        Drawable pageMarginDrawable = ThemeUtils.getDrawable(this, R.attr.tab_page_margin_drawable,
+                R.drawable.tab_page_margin_dark);
+            viewPager.setPageMarginDrawable(pageMarginDrawable);
         viewPager.setAdapter(adapter);
         TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
         tabLayout.setupWithViewPager(viewPager);

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

@@ -77,7 +77,7 @@ public class NotificationsFragment extends SFragment implements
         recyclerView.setLayoutManager(layoutManager);
         DividerItemDecoration divider = new DividerItemDecoration(
                 context, layoutManager.getOrientation());
-        Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider);
+        Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider_dark);
         divider.setDrawable(drawable);
         recyclerView.addItemDecoration(divider);
         scrollListener = new EndlessOnScrollListener(layoutManager) {

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

@@ -154,6 +154,7 @@ public class PullNotificationService extends IntentService {
     }
 
     private void loadAvatar(final List<MentionResult> mentions, String url) {
+        if (url != null) {
             ImageRequest request = new ImageRequest(url, new Response.Listener<Bitmap>() {
                 @Override
                 public void onResponse(Bitmap response) {
@@ -166,6 +167,9 @@ public class PullNotificationService extends IntentService {
                 }
             });
             VolleySingleton.getInstance(this).addToRequestQueue(request);
+        } else {
+            updateNotification(mentions, null);
+        }
     }
 
     private void updateNotification(List<MentionResult> mentions, @Nullable Bitmap icon) {

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

@@ -80,10 +80,12 @@ public class StatusViewHolder extends RecyclerView.ViewHolder {
         mediaPreview1 = (NetworkImageView) itemView.findViewById(R.id.status_media_preview_1);
         mediaPreview2 = (NetworkImageView) itemView.findViewById(R.id.status_media_preview_2);
         mediaPreview3 = (NetworkImageView) itemView.findViewById(R.id.status_media_preview_3);
-        mediaPreview0.setDefaultImageResId(R.drawable.media_preview_unloaded);
+        int mediaPreviewUnloadedId = ThemeUtils.getDrawableId(itemView.getContext(),
-        mediaPreview1.setDefaultImageResId(R.drawable.media_preview_unloaded);
+                R.attr.media_preview_unloaded_drawable, android.R.color.black);
-        mediaPreview2.setDefaultImageResId(R.drawable.media_preview_unloaded);
+        mediaPreview0.setDefaultImageResId(mediaPreviewUnloadedId);
-        mediaPreview3.setDefaultImageResId(R.drawable.media_preview_unloaded);
+        mediaPreview1.setDefaultImageResId(mediaPreviewUnloadedId);
+        mediaPreview2.setDefaultImageResId(mediaPreviewUnloadedId);
+        mediaPreview3.setDefaultImageResId(mediaPreviewUnloadedId);
         sensitiveMediaWarning = itemView.findViewById(R.id.status_sensitive_media_warning);
         contentWarningBar = itemView.findViewById(R.id.status_content_warning_bar);
         contentWarningDescription =

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

@@ -0,0 +1,52 @@
+/* Copyright 2017 Andrew Dawson
+ *
+ * This file is part of Tusky.
+ *
+ * Tusky is free software: you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License as published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky. If not, see
+ * <http://www.gnu.org/licenses/>. */
+
+package com.keylesspalace.tusky;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.support.v4.content.ContextCompat;
+import android.util.TypedValue;
+
+public class ThemeUtils {
+    public static Drawable getDrawable(Context context, int attribute, int fallbackDrawable) {
+        TypedValue value = new TypedValue();
+        int resourceId;
+        if (context.getTheme().resolveAttribute(attribute, value, true)) {
+            resourceId = value.resourceId;
+        } else {
+            resourceId = fallbackDrawable;
+        }
+        return ContextCompat.getDrawable(context, resourceId);
+    }
+
+    public static int getDrawableId(Context context, int attribute, int fallbackDrawableId) {
+        TypedValue value = new TypedValue();
+        if (context.getTheme().resolveAttribute(attribute, value, true)) {
+            return value.resourceId;
+        } else {
+            return fallbackDrawableId;
+        }
+    }
+
+    public static int getColor(Context context, int attribute) {
+        TypedValue value = new TypedValue();
+        if (context.getTheme().resolveAttribute(attribute, value, true)) {
+            return value.data;
+        } else {
+            return android.R.color.black;
+        }
+    }
+}

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

@@ -102,7 +102,8 @@ public class TimelineFragment extends SFragment implements
         recyclerView.setLayoutManager(layoutManager);
         DividerItemDecoration divider = new DividerItemDecoration(
                 context, layoutManager.getOrientation());
-        Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider);
+        Drawable drawable = ThemeUtils.getDrawable(context, R.attr.status_divider_drawable,
+                R.drawable.status_divider_dark);
         divider.setDrawable(drawable);
         recyclerView.addItemDecoration(divider);
         scrollListener = new EndlessOnScrollListener(layoutManager) {

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

@@ -60,7 +60,7 @@ public class ViewThreadFragment extends SFragment implements StatusActionListene
         recyclerView.setLayoutManager(layoutManager);
         DividerItemDecoration divider = new DividerItemDecoration(
                 context, layoutManager.getOrientation());
-        Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider);
+        Drawable drawable = ContextCompat.getDrawable(context, R.drawable.status_divider_dark);
         divider.setDrawable(drawable);
         recyclerView.addItemDecoration(divider);
         adapter = new ThreadAdapter(this);

app/src/main/res/drawable/media_preview_unloaded_dark.xml

@@ -3,7 +3,7 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
 
-    <solid android:color="?attr/media_preview_unloaded_background_color" />
+    <solid android:color="@color/media_preview_unloaded_background_dark" />
 
     <stroke
         android:dashWidth="4dp"

app/src/main/res/drawable/media_preview_unloaded_light.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <solid android:color="@color/media_preview_unloaded_background_light" />
+
+    <stroke
+        android:dashWidth="4dp"
+        android:dashGap="4dp"
+        android:width="2dp"
+        android:color="#AFAFAF" />
+
+</shape>

app/src/main/res/drawable/status_divider_dark.xml

@@ -2,5 +2,5 @@
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
     <size android:height="1dp" />
-    <solid android:color="?attr/status_divider_color" />
+    <solid android:color="@color/status_divider_dark" />
 </shape>

app/src/main/res/drawable/status_divider_light.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <size android:height="1dp" />
+    <solid android:color="@color/status_divider_light" />
+</shape>

app/src/main/res/drawable/tab_page_margin_dark.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
-    <solid android:color="?attr/tab_page_margin_color" />
+    <solid android:color="@color/tab_page_margin_dark" />
 </shape>

app/src/main/res/drawable/tab_page_margin_light.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/tab_page_margin_light" />
+</shape>

app/src/main/res/values/attrs.xml

@@ -18,10 +18,10 @@
     <attr name="status_reblog_button_style" format="reference" />
     <attr name="content_warning_button" format="reference" />
     <attr name="sensitive_media_warning_background_color" format="reference|color" />
-    <attr name="media_preview_unloaded_background_color" format="reference|color" />
     <attr name="status_text_color_secondary" format="reference|color" />
-    <attr name="status_divider_color" format="reference|color" />
+    <attr name="media_preview_unloaded_drawable" format="reference" />
-    <attr name="tab_page_margin_color" format="reference|color" />
+    <attr name="status_divider_drawable" format="reference" />
+    <attr name="tab_page_margin_drawable" format="reference" />
     <attr name="notification_content" format="reference" />
     <attr name="notification_icon_tint" format="reference|color" />
     <attr name="account_header_background_color" format="reference|color" />

app/src/main/res/values/styles.xml

@@ -31,10 +31,10 @@
         <item name="status_favourite_button_style">@style/AppTheme.FavouriteButton.Dark</item>
         <item name="content_warning_button">@drawable/toggle_small</item>
         <item name="sensitive_media_warning_background_color">@color/sensitive_media_warning_background_dark</item>
-        <item name="media_preview_unloaded_background_color">@color/media_preview_unloaded_background_dark</item>
         <item name="status_text_color_secondary">@color/status_text_secondary_dark</item>
-        <item name="status_divider_color">@color/status_divider_dark</item>
+        <item name="media_preview_unloaded_drawable">@drawable/media_preview_unloaded_dark</item>
-        <item name="tab_page_margin_color">@color/tab_page_margin_dark</item>
+        <item name="status_divider_drawable">@drawable/status_divider_dark</item>
+        <item name="tab_page_margin_drawable">@drawable/tab_page_margin_dark</item>
         <item name="account_header_background_color">@color/account_header_background_dark</item>
         <item name="compose_media_button_tint">@color/media_button_dark</item>
         <item name="compose_mention_color">@color/compose_mention_dark</item>
@@ -86,10 +86,10 @@
         <item name="status_favourite_button_style">@style/AppTheme.FavouriteButton.Light</item>
         <item name="content_warning_button">@drawable/toggle_small_light</item>
         <item name="sensitive_media_warning_background_color">@color/sensitive_media_warning_background_light</item>
-        <item name="media_preview_unloaded_background_color">@color/media_preview_unloaded_background_light</item>
         <item name="status_text_color_secondary">@color/status_text_secondary_light</item>
-        <item name="status_divider_color">@color/status_divider_light</item>
+        <item name="media_preview_unloaded_drawable">@drawable/media_preview_unloaded_light</item>
-        <item name="tab_page_margin_color">@color/tab_page_margin_light</item>
+        <item name="status_divider_drawable">@drawable/status_divider_light</item>
+        <item name="tab_page_margin_drawable">@drawable/tab_page_margin_light</item>
         <item name="account_header_background_color">@color/account_header_background_light</item>
         <item name="compose_media_button_tint">@color/media_button_light</item>
         <item name="compose_mention_color">@color/compose_mention_light</item>