Code analysis - address @NotNull/@Nullable issues.

src/org/thoughtcrime/securesms/components/CustomDefaultPreference.java

@@ -140,7 +140,7 @@ public class CustomDefaultPreference extends DialogPreference {
 
 
     @Override
-    public Dialog onCreateDialog(Bundle instanceState) {
+    public @NonNull Dialog onCreateDialog(Bundle instanceState) {
       Dialog dialog = super.onCreateDialog(instanceState);
 
       CustomDefaultPreference preference = (CustomDefaultPreference)getPreference();

src/org/thoughtcrime/securesms/components/RecentPhotoViewRail.java

@@ -64,17 +64,17 @@ public class RecentPhotoViewRail extends FrameLayout implements LoaderManager.Lo
   }
 
   @Override
-  public Loader<Cursor> onCreateLoader(int id, Bundle args) {
+  public @NonNull Loader<Cursor> onCreateLoader(int id, Bundle args) {
     return new RecentPhotosLoader(getContext());
   }
 
   @Override
-  public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
+  public void onLoadFinished(@NonNull Loader<Cursor> loader, Cursor data) {
     this.recyclerView.setAdapter(new RecentPhotoAdapter(getContext(), data, RecentPhotosLoader.BASE_URL, listener));
   }
 
   @Override
-  public void onLoaderReset(Loader<Cursor> loader) {
+  public void onLoaderReset(@NonNull Loader<Cursor> loader) {
     ((CursorRecyclerViewAdapter)this.recyclerView.getAdapter()).changeCursor(null);
   }
 

src/org/thoughtcrime/securesms/components/RecyclerViewFastScroller.java

@@ -52,7 +52,7 @@ public class RecyclerViewFastScroller extends LinearLayout {
 
   private final RecyclerView.OnScrollListener onScrollListener = new RecyclerView.OnScrollListener() {
     @Override
-    public void onScrolled(final RecyclerView recyclerView, final int dx, final int dy) {
+    public void onScrolled(@NonNull final RecyclerView recyclerView, final int dx, final int dy) {
       if (handle.isSelected()) return;
       final int   offset      = recyclerView.computeVerticalScrollOffset();
       final int   range       = recyclerView.computeVerticalScrollRange();

src/org/thoughtcrime/securesms/components/emoji/EmojiDrawer.java

@@ -165,19 +165,19 @@ public class EmojiDrawer extends LinearLayout implements InputView, EmojiSelecti
     }
 
     @Override
-    public void destroyItem(ViewGroup container, int position, Object object) {
+    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
       container.removeView((View)object);
     }
 
     @Override
-    public void setPrimaryItem(ViewGroup container, int position, Object object) {
+    public void setPrimaryItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
       EmojiPageView current = (EmojiPageView) object;
       current.onSelected();
       super.setPrimaryItem(container, position, object);
     }
 
     @Override
-    public boolean isViewFromObject(View view, Object object) {
+    public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
       return view == object;
     }
 

src/org/thoughtcrime/securesms/components/emoji/EmojiSpan.java

@@ -25,7 +25,7 @@ public class EmojiSpan extends AnimatingImageSpan {
   }
 
   @Override
-  public int getSize(Paint paint, CharSequence text, int start, int end, FontMetricsInt fm) {
+  public int getSize(@NonNull Paint paint, CharSequence text, int start, int end, FontMetricsInt fm) {
     if (fm != null && this.fm != null) {
       fm.ascent  = this.fm.ascent;
       fm.descent = this.fm.descent;
@@ -39,7 +39,7 @@ public class EmojiSpan extends AnimatingImageSpan {
   }
 
   @Override
-  public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
+  public void draw(@NonNull Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, @NonNull Paint paint) {
     int height          = bottom - top;
     int centeringMargin = (height - size) / 2;
     int adjustedMargin  = (int) (centeringMargin * SHIFT_FACTOR);

src/org/thoughtcrime/securesms/components/emoji/parsing/EmojiDrawInfo.java

@@ -22,7 +22,7 @@ public class EmojiDrawInfo {
   }
 
   @Override
-  public String toString() {
+  public @NonNull String toString() {
     return "DrawInfo{" +
         "page=" + page +
         ", index=" + index +

src/org/thoughtcrime/securesms/components/emoji/parsing/EmojiPageBitmap.java

@@ -104,7 +104,7 @@ public class EmojiPageBitmap {
   }
 
   @Override
-  public String toString() {
+  public @NonNull String toString() {
     return model.getSprite();
   }
 }

src/org/thoughtcrime/securesms/components/emoji/parsing/EmojiParser.java

@@ -124,7 +124,7 @@ public class EmojiParser {
     }
 
     @Override
-    public Iterator<Candidate> iterator() {
+    public @NonNull Iterator<Candidate> iterator() {
       return list.iterator();
     }
   }