Added the possibility to use theme attributes in order to style dialogs.

Author: michael-rapp

library/src/main/java/de/mrapp/android/dialog/MaterialDialog.java

@@ -258,6 +258,127 @@ public static class Builder {
          */
         private View customTitleView;
 
+        /**
+         * Obtains all relevant attributes from the current theme.
+         */
+        private void obtainStyledAttributes() {
+            int themeId = themeResourceId != -1 ? themeResourceId : 0;
+            obtainBackground(themeId);
+            obtainButtonTextColor(themeId);
+            obtainItemColor(themeId);
+            obtainItemControlColor(themeId);
+            obtainMessageColor(themeId);
+            obtainTitleColor(themeId);
+        }
+
+        /**
+         * Obtains the background from a specific theme.
+         *
+         * @param themeId
+         *         The id of the theme, the background should be obtained from, as an {@link
+         *         Integer} value
+         */
+        private void obtainBackground(@StyleRes final int themeId) {
+            TypedArray typedArray = getContext().getTheme()
+                    .obtainStyledAttributes(themeId, new int[]{R.attr.materialDialogBackground});
+            int color = typedArray.getColor(0, -1);
+
+            if (color != -1) {
+                setBackgroundColor(color);
+            } else {
+                int resourceId = typedArray.getResourceId(0, 0);
+
+                if (resourceId != 0) {
+                    setBackground(resourceId);
+                }
+            }
+        }
+
+        /**
+         * Obtains the button text color from a specific theme.
+         *
+         * @param themeId
+         *         The id of the theme, the button text color should be obtained from, as an {@link
+         *         Integer} value
+         */
+        private void obtainButtonTextColor(@StyleRes final int themeId) {
+            TypedArray typedArray = getContext().getTheme().obtainStyledAttributes(themeId,
+                    new int[]{R.attr.materialDialogButtonTextColor});
+            int color = typedArray.getColor(0, -1);
+
+            if (color != -1) {
+                setButtonTextColor(color);
+            }
+        }
+
+        /**
+         * Obtains the item color from a specific theme.
+         *
+         * @param themeId
+         *         The id of the theme, the item color should be obtained from, as an {@link
+         *         Integer} value
+         */
+        private void obtainItemColor(@StyleRes final int themeId) {
+            TypedArray typedArray = getContext().getTheme()
+                    .obtainStyledAttributes(themeId, new int[]{R.attr.materialDialogItemColor});
+            int color = typedArray.getColor(0, -1);
+
+            if (color != -1) {
+                setItemColor(color);
+            }
+        }
+
+        /**
+         * Obtains the item control color from a specific theme.
+         *
+         * @param themeId
+         *         The id of the theme, the item control color should be obtained from, as an {@link
+         *         Integer} value
+         */
+        private void obtainItemControlColor(@StyleRes final int themeId) {
+            TypedArray typedArray = getContext().getTheme().obtainStyledAttributes(themeId,
+                    new int[]{R.attr.materialDialogItemControlColor});
+            int color = typedArray.getColor(0, -1);
+
+            if (color != -1) {
+                setItemControlColor(color);
+            }
+        }
+
+        /**
+         * Obtains the message color from a specific theme.
+         *
+         * @param themeId
+         *         The id of the theme, the message color should be obtained from, as an {@link
+         *         Integer} value
+         */
+        private void obtainMessageColor(@StyleRes final int themeId) {
+            TypedArray typedArray = getContext().getTheme()
+                    .obtainStyledAttributes(themeId, new int[]{R.attr.materialDialogMessageColor});
+            int color = typedArray.getColor(0, -1);
+
+            if (color != -1) {
+                setMessageColor(color);
+            }
+        }
+
+        /**
+         * Obtains the title color from a specific theme.
+         *
+         * @param themeId
+         *         The id of the theme, the title color should be obtained from, as an {@link
+         *         Integer} value
+         */
+        private void obtainTitleColor(@StyleRes final int themeId) {
+            TypedArray typedArray = getContext().getTheme()
+                    .obtainStyledAttributes(themeId, new int[]{R.attr.materialDialogTitleColor});
+            int color = typedArray.getColor(0, -1);
+
+            if (color != -1) {
+                setTitleColor(color);
+            }
+        }
+
         /**
          * Inflates the dialog's layout.
          *
@@ -710,6 +831,7 @@ public Builder(@NonNull final Context context) {
             this.context = context;
             this.themeResourceId = -1;
             this.validators = new LinkedHashSet<>();
+            obtainStyledAttributes();
         }
 
         /**
@@ -727,6 +849,7 @@ public Builder(@NonNull final Context context, @StyleRes final int themeResource
             this.context = context;
             this.themeResourceId = themeResourceId;
             this.validators = new LinkedHashSet<>();
+            obtainStyledAttributes();
         }
 
         /**

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

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+AndroidMaterialDialog Copyright 2014 - 2015 Michael Rapp
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU
+Lesser General Public License as published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program 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 Lesser General Public License along with this program. If
+not, see <http://www.gnu.org/licenses/>.
+-->
+<resources>
+
+    <attr name="materialDialogBackground" format="color|reference"/>
+    <attr name="materialDialogButtonTextColor" format="color"/>
+    <attr name="materialDialogItemColor" format="color"/>
+    <attr name="materialDialogItemControlColor" format="color"/>
+    <attr name="materialDialogMessageColor" format="color"/>
+    <attr name="materialDialogTitleColor" format="color"/>
+
+</resources>