1 files changed, 109 insertions, 0 deletions
diff --git a/src/com/android/launcher3/compat/WallpaperManagerCompatVOMR1.java b/src/com/android/launcher3/compat/WallpaperManagerCompatVOMR1.java
new file mode 100644
index 000000000..c74ccc0cc
--- /dev/null
+++ b/src/com/android/launcher3/compat/WallpaperManagerCompatVOMR1.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.compat;
+
+import android.annotation.TargetApi;
+import android.app.WallpaperManager;
+import android.content.Context;
+import android.graphics.Color;
+import android.os.Build;
+import android.support.annotation.Nullable;
+import android.util.Log;
+import android.util.Pair;
+import android.util.SparseIntArray;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.List;
+
+@TargetApi(Build.VERSION_CODES.O)
+public class WallpaperManagerCompatVOMR1 extends WallpaperManagerCompat {
+
+    private static final String TAG = "WMCompatVOMR1";
+
+    private final WallpaperManager mWm;
+
+    private final Class mOCLClass;
+    private final Method mAddOCLMethod;
+
+    private final Method mWCGetMethod;
+    private final Method mWCGetColorsMethod;
+    private final Method mWCSupportsDarkTextMethod;
+
+    WallpaperManagerCompatVOMR1(Context context) throws Exception {
+        mWm = context.getSystemService(WallpaperManager.class);
+
+        mOCLClass = Class.forName("android.app.WallpaperManager$OnColorsChangedListener");
+        mAddOCLMethod = WallpaperManager.class.getDeclaredMethod(
+                "addOnColorsChangedListener", mOCLClass);
+
+        mWCGetMethod = WallpaperManager.class.getDeclaredMethod("getWallpaperColors", int.class);
+        Class wallpaperColorsClass = mWCGetMethod.getReturnType();
+        mWCGetColorsMethod = wallpaperColorsClass.getDeclaredMethod("getColors");
+        mWCSupportsDarkTextMethod = wallpaperColorsClass.getDeclaredMethod("supportsDarkText");
+    }
+
+    @Nullable
+    @Override
+    public WallpaperColorsCompat getWallpaperColors(int which) {
+        try {
+            return convertColorsObject(mWCGetMethod.invoke(mWm, which));
+        } catch (Exception e) {
+            Log.e(TAG, "Error calling wallpaper API", e);
+            return null;
+        }
+    }
+
+    @Override
+    public void addOnColorsChangedListener(final OnColorsChangedListenerCompat listener) {
+        Object onChangeListener = Proxy.newProxyInstance(
+                WallpaperManager.class.getClassLoader(),
+                new Class[]{mOCLClass},
+                new InvocationHandler() {
+                    @Override
+                    public Object invoke(Object o, Method method, Object[] objects)
+                            throws Throwable {
+                        String methodName = method.getName();
+                        if ("onColorsChanged".equals(methodName)) {
+                            listener.onColorsChanged(
+                                    convertColorsObject(objects[0]), (Integer) objects[1]);
+                        } else if ("toString".equals(methodName)) {
+                            return listener.toString();
+                        }
+                        return null;
+                    }
+                });
+        try {
+            mAddOCLMethod.invoke(mWm, onChangeListener);
+        } catch (Exception e) {
+            Log.e(TAG, "Error calling wallpaper API", e);
+        }
+    }
+
+    private WallpaperColorsCompat convertColorsObject(Object colors) throws Exception {
+        if (colors == null) {
+            return null;
+        }
+        List<Pair<Color, Integer>> list = (List) mWCGetColorsMethod.invoke(colors);
+        boolean supportsDarkText = (Boolean) mWCSupportsDarkTextMethod.invoke(colors);
+        SparseIntArray colorMap = new SparseIntArray(list.size());
+        for (Pair<Color, Integer> color : list) {
+            colorMap.put(color.first.toArgb(), color.second);
+        }
+        return new WallpaperColorsCompat(colorMap, supportsDarkText);
+    }
+}