Fix errors in preference layout preview.

Author: kizitonwose

CHANGELOG.md

@@ -82,7 +82,7 @@ public Dialog onCreateDialog(Bundle savedInstanceState) {
         LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
         View rootView = layoutInflater.inflate(R.layout.dialog_colors, null);
 
-        colorGrid = (GridLayout) rootView.findViewById(R.id.color_grid);
+        colorGrid = rootView.findViewById(R.id.color_grid);
         colorGrid.setColumnCount(numColumns);
         repopulateItems();
 

core/src/main/java/com/kizitonwose/colorpreference/ColorDialog.java

@@ -36,7 +36,7 @@ private void initAttrs(AttributeSet attrs, int defStyle) {
         TypedArray a = getContext().getTheme().obtainStyledAttributes(
                 attrs, R.styleable.ColorPreference, defStyle, defStyle);
 
-        PreviewSize previewSize = PreviewSize.NORMAL;
+        PreviewSize previewSize;
         try {
             numColumns = a.getInteger(R.styleable.ColorPreference_numColumns, numColumns);
             colorShape = ColorShape.getShape(a.getInteger(R.styleable.ColorPreference_colorShape, 1));
@@ -56,8 +56,10 @@ private void initAttrs(AttributeSet attrs, int defStyle) {
     @Override
     protected void onBindView(View view) {
         super.onBindView(view);
-        ImageView previewView = (ImageView) view.findViewById(R.id.color_view);
-        ColorUtils.setColorViewValue(previewView, value, false, colorShape);
+        ImageView colorView = view.findViewById(R.id.color_view);
+        if (colorView != null) {
+            ColorUtils.setColorViewValue(colorView, value, false, colorShape);
+        }
     }
 
     public void setValue(int value) {

core/src/main/java/com/kizitonwose/colorpreference/ColorPreference.java

@@ -86,18 +86,22 @@ public static void showDialog(Context context, ColorDialog.OnColorSelectedListen
         fragment.setOnColorSelectedListener(listener);
 
         Activity activity = Utils.resolveContext(context);
-        activity.getFragmentManager().beginTransaction()
-                .add(fragment, tag)
-                .commit();
+        if (activity != null) {
+            activity.getFragmentManager()
+                    .beginTransaction()
+                    .add(fragment, tag)
+                    .commit();
+        }
     }
 
     public static void attach(Context context, ColorDialog.OnColorSelectedListener listener, String tag) {
         Activity activity = Utils.resolveContext(context);
-        ColorDialog fragment = (ColorDialog) activity
-                .getFragmentManager().findFragmentByTag(tag);
-        if (fragment != null) {
-            // re-bind preference to fragment
-            fragment.setOnColorSelectedListener(listener);
+        if (activity != null) {
+            ColorDialog fragment = (ColorDialog) activity.getFragmentManager().findFragmentByTag(tag);
+            if (fragment != null) {
+                // re-bind preference to fragment
+                fragment.setOnColorSelectedListener(listener);
+            }
         }
     }
 

core/src/main/java/com/kizitonwose/colorpreference/ColorUtils.java

@@ -9,9 +9,9 @@
  * @author Kizito Nwose
  */
 
-public class Utils {
+class Utils {
     @Nullable
-    public static Activity resolveContext(Context context) {
+    static Activity resolveContext(Context context) {
         if (context instanceof Activity) {
             return (Activity) context;
         } else if (context instanceof ContextWrapper) {

core/src/main/java/com/kizitonwose/colorpreference/Utils.java

@@ -43,7 +43,7 @@ private void initAttrs(AttributeSet attrs, int defStyle) {
         TypedArray a = getContext().getTheme().obtainStyledAttributes(
                 attrs, R.styleable.ColorPreferenceCompat, defStyle, defStyle);
 
-        PreviewSize previewSize = PreviewSize.NORMAL;
+        PreviewSize previewSize;
         try {
             numColumns = a.getInteger(R.styleable.ColorPreferenceCompat_numColumns, numColumns);
             colorShape = ColorShape.getShape(a.getInteger(R.styleable.ColorPreferenceCompat_colorShape, 1));
@@ -63,8 +63,10 @@ private void initAttrs(AttributeSet attrs, int defStyle) {
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);
-        ImageView previewView = (ImageView) holder.findViewById(R.id.color_view);
-        ColorUtils.setColorViewValue(previewView, value, false, colorShape);
+        ImageView colorView = (ImageView) holder.findViewById(R.id.color_view);
+        if (colorView != null) {
+            ColorUtils.setColorViewValue(colorView, value, false, colorShape);
+        }
     }
 
     public void setValue(int value) {