Added setTitle(int) and setContent(int) to MaterialDialog. Added use of many more new annotations from 22.2, e.g. to indicate null values can be used, to enforce color integers to be used where they should, and to warn you if a method should be called on the UI thread when it's not.

library/src/main/java/com/afollestad/materialdialogs/AlertDialogWrapper.java

@@ -10,6 +10,7 @@ import android.support.annotation.DrawableRes;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.annotation.StringRes;
+import android.support.annotation.UiThread;
 import android.view.View;
 import android.widget.ListAdapter;
 
@@ -160,12 +161,14 @@ public class AlertDialogWrapper {
             return this;
         }
 
+        @UiThread
         public Dialog create() {
             addButtonsCallback();
             addListCallbacks();
             return builder.build();
         }
 
+        @UiThread
         public Dialog show() {
             Dialog dialog = create();
             dialog.show();

library/src/main/java/com/afollestad/materialdialogs/MaterialDialog.java

@@ -8,9 +8,9 @@ import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Handler;
-import android.os.Looper;
 import android.support.annotation.ArrayRes;
 import android.support.annotation.AttrRes;
+import android.support.annotation.ColorInt;
 import android.support.annotation.ColorRes;
 import android.support.annotation.DimenRes;
 import android.support.annotation.DrawableRes;
@@ -18,6 +18,7 @@ import android.support.annotation.LayoutRes;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.annotation.StringRes;
+import android.support.annotation.UiThread;
 import android.support.v4.content.res.ResourcesCompat;
 import android.text.Editable;
 import android.text.TextUtils;
@@ -541,7 +542,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder titleColor(int color) {
+        public Builder titleColor(@ColorInt int color) {
             this.titleColor = color;
             this.titleColorSet = true;
             return this;
@@ -565,7 +566,7 @@ public class MaterialDialog extends DialogBase implements
          * @param regular The font used everywhere else, like on the content and list items. Null uses device default.
          * @return The Builder instance so you can chain calls to it.
          */
-        public Builder typeface(Typeface medium, Typeface regular) {
+        public Builder typeface(@Nullable Typeface medium, @Nullable Typeface regular) {
             this.mediumFont = medium;
             this.regularFont = regular;
             return this;
@@ -579,7 +580,7 @@ public class MaterialDialog extends DialogBase implements
          * @param regular The name of font in assets/fonts used everywhere else, like content and list items (null uses device default). E.g. [your-project]/app/main/assets/fonts/[regular]
          * @return The Builder instance so you can chain calls to it.
          */
-        public Builder typeface(String medium, String regular) {
+        public Builder typeface(@Nullable String medium, @Nullable String regular) {
             if (medium != null) {
                 this.mediumFont = TypefaceHelper.get(this.context, medium);
                 if (this.mediumFont == null)
@@ -625,7 +626,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder contentColor(int color) {
+        public Builder contentColor(@ColorInt int color) {
             this.contentColor = color;
             this.contentColorSet = true;
             return this;
@@ -670,7 +671,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder itemColor(int color) {
+        public Builder itemColor(@ColorInt int color) {
             this.itemColor = color;
             this.itemColorSet = true;
             return this;
@@ -730,7 +731,7 @@ public class MaterialDialog extends DialogBase implements
          * @param callback        The callback that will be called when the presses the positive button.
          * @return The Builder instance so you can chain calls to it.
          */
-        public Builder itemsCallbackMultiChoice(Integer[] selectedIndices, @NonNull ListCallbackMultiChoice callback) {
+        public Builder itemsCallbackMultiChoice(@Nullable Integer[] selectedIndices, @NonNull ListCallbackMultiChoice callback) {
             this.selectedIndices = selectedIndices;
             this.listCallback = null;
             this.listCallbackSingleChoice = null;
@@ -760,7 +761,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder positiveColor(int color) {
+        public Builder positiveColor(@ColorInt int color) {
             this.positiveColor = color;
             return this;
         }
@@ -782,7 +783,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder negativeColor(int color) {
+        public Builder negativeColor(@ColorInt int color) {
             this.negativeColor = color;
             return this;
         }
@@ -804,7 +805,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder neutralColor(int color) {
+        public Builder neutralColor(@ColorInt int color) {
             this.neutralColor = color;
             return this;
         }
@@ -913,7 +914,7 @@ public class MaterialDialog extends DialogBase implements
             return progress(indeterminate, max);
         }
 
-        public Builder widgetColor(int color) {
+        public Builder widgetColor(@ColorInt int color) {
             this.widgetColor = color;
             return this;
         }
@@ -926,7 +927,7 @@ public class MaterialDialog extends DialogBase implements
             return widgetColorRes(DialogUtils.resolveColor(this.context, colorAttr));
         }
 
-        public Builder dividerColor(int color) {
+        public Builder dividerColor(@ColorInt int color) {
             this.dividerColor = color;
             return this;
         }
@@ -939,7 +940,7 @@ public class MaterialDialog extends DialogBase implements
             return dividerColor(DialogUtils.resolveColor(this.context, colorAttr));
         }
 
-        public Builder backgroundColor(int color) {
+        public Builder backgroundColor(@ColorInt int color) {
             this.backgroundColor = color;
             return this;
         }
@@ -987,7 +988,7 @@ public class MaterialDialog extends DialogBase implements
          * @param callback The callback invoked when an item in the list is selected.
          * @return This Builder object to allow for chaining of calls to set methods
          */
-        public Builder adapter(@NonNull ListAdapter adapter, ListCallback callback) {
+        public Builder adapter(@NonNull ListAdapter adapter, @Nullable ListCallback callback) {
             if (this.customView != null)
                 throw new IllegalStateException("You cannot set adapter() when you're using a custom view.");
             this.adapter = adapter;
@@ -1037,7 +1038,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder input(CharSequence hint, CharSequence prefill, boolean allowEmptyInput, @NonNull InputCallback callback) {
+        public Builder input(@Nullable CharSequence hint, @Nullable CharSequence prefill, boolean allowEmptyInput, @NonNull InputCallback callback) {
             if (this.customView != null)
                 throw new IllegalStateException("You cannot set content() when you're using a custom view.");
             this.inputCallback = callback;
@@ -1047,7 +1048,7 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
-        public Builder input(CharSequence hint, CharSequence prefill, @NonNull InputCallback callback) {
+        public Builder input(@Nullable CharSequence hint, @Nullable CharSequence prefill, @NonNull InputCallback callback) {
             return input(hint, prefill, true, callback);
         }
 
@@ -1095,10 +1096,12 @@ public class MaterialDialog extends DialogBase implements
             return this;
         }
 
+        @UiThread
         public MaterialDialog build() {
             return new MaterialDialog(this);
         }
 
+        @UiThread
         public MaterialDialog show() {
             MaterialDialog dialog = build();
             dialog.show();
@@ -1107,9 +1110,8 @@ public class MaterialDialog extends DialogBase implements
     }
 
     @Override
+    @UiThread
     public void show() {
-        if (Looper.myLooper() != Looper.getMainLooper())
-            throw new IllegalStateException("Dialogs can only be shown from the UI thread.");
         try {
             super.show();
             mHandler = new Handler();
@@ -1188,6 +1190,7 @@ public class MaterialDialog extends DialogBase implements
      * @param which The action button to update.
      * @param title The new title of the action button.
      */
+    @UiThread
     public final void setActionButton(@NonNull final DialogAction which, final CharSequence title) {
         switch (which) {
             default:
@@ -1243,30 +1246,55 @@ public class MaterialDialog extends DialogBase implements
         return number;
     }
 
-    public final void setTitle(@NonNull final CharSequence newTitle) {
+    @UiThread
+    public final void setTitle(@NonNull CharSequence newTitle) {
         title.setText(newTitle);
     }
 
+    @UiThread
+    public final void setTitle(@StringRes int newTitleRes) {
+        setTitle(mBuilder.context.getString(newTitleRes));
+    }
+
+    @UiThread
+    public final void setTitle(@StringRes int newTitleRes, @Nullable Object... formatArgs) {
+        setTitle(mBuilder.context.getString(newTitleRes, formatArgs));
+    }
+
+    @UiThread
     public void setIcon(@DrawableRes final int resId) {
         icon.setImageResource(resId);
         icon.setVisibility(resId != 0 ? View.VISIBLE : View.GONE);
     }
 
+    @UiThread
     public void setIcon(final Drawable d) {
         icon.setImageDrawable(d);
         icon.setVisibility(d != null ? View.VISIBLE : View.GONE);
     }
 
+    @UiThread
     public void setIconAttribute(@AttrRes int attrId) {
         Drawable d = DialogUtils.resolveDrawable(mBuilder.context, attrId);
         setIcon(d);
     }
 
-    public final void setContent(final CharSequence newContent) {
+    @UiThread
+    public final void setContent(CharSequence newContent) {
         content.setText(newContent);
         content.setVisibility(TextUtils.isEmpty(newContent) ? View.GONE : View.VISIBLE);
     }
 
+    @UiThread
+    public final void setContent(@StringRes int newContentRes) {
+        setContent(mBuilder.context.getString(newContentRes));
+    }
+
+    @UiThread
+    public final void setContent(@StringRes int newContentRes, @Nullable Object... formatArgs) {
+        setContent(mBuilder.context.getString(newContentRes, formatArgs));
+    }
+
     /**
      * @deprecated Use setContent() instead.
      */
@@ -1275,6 +1303,7 @@ public class MaterialDialog extends DialogBase implements
         setContent(message);
     }
 
+    @UiThread
     public final void setItems(CharSequence[] items) {
         if (mBuilder.adapter == null)
             throw new IllegalStateException("This MaterialDialog instance does not yet have an adapter set to it. You cannot use setItems().");
@@ -1367,6 +1396,7 @@ public class MaterialDialog extends DialogBase implements
      *
      * @param index The index of the list item to check.
      */
+    @UiThread
     public void setSelectedIndex(int index) {
         mBuilder.selectedIndex = index;
         if (mBuilder.adapter != null && mBuilder.adapter instanceof MaterialDialogAdapter) {
@@ -1383,6 +1413,7 @@ public class MaterialDialog extends DialogBase implements
      *
      * @param indices The indices of the list items to check.
      */
+    @UiThread
     public void setSelectedIndices(@NonNull Integer[] indices) {
         mBuilder.selectedIndices = indices;
         selectedIndicesList = new ArrayList<>(Arrays.asList(indices));

library/src/main/java/com/afollestad/materialdialogs/ThemeSingleton.java

@@ -1,6 +1,7 @@
 package com.afollestad.materialdialogs;
 
 import android.graphics.drawable.Drawable;
+import android.support.annotation.ColorInt;
 import android.support.annotation.DrawableRes;
 
 /**
@@ -21,15 +22,24 @@ public class ThemeSingleton {
     }
 
     public boolean darkTheme = false;
+    @ColorInt
     public int titleColor = 0;
+    @ColorInt
     public int contentColor = 0;
+    @ColorInt
     public int positiveColor = 0;
+    @ColorInt
     public int neutralColor = 0;
+    @ColorInt
     public int negativeColor = 0;
+    @ColorInt
     public int widgetColor = 0;
+    @ColorInt
     public int itemColor = 0;
     public Drawable icon = null;
+    @ColorInt
     public int backgroundColor = 0;
+    @ColorInt
     public int dividerColor = 0;
 
     @DrawableRes