Initial checkin of AOSP Messaging app.

b/23110861

Change-Id: I11db999bd10656801e618f78ab2b2ef74136fff1

src/com/android/messaging/util/ImeUtil.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2015 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.messaging.util;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+
+import com.google.common.annotations.VisibleForTesting;
+
+public class ImeUtil {
+    public interface ImeStateObserver {
+        void onImeStateChanged(boolean imeOpen);
+    }
+
+    public interface ImeStateHost {
+        void onDisplayHeightChanged(int heightMeasureSpec);
+        void registerImeStateObserver(ImeUtil.ImeStateObserver observer);
+        void unregisterImeStateObserver(ImeUtil.ImeStateObserver observer);
+        boolean isImeOpen();
+    }
+
+    private static volatile ImeUtil sInstance;
+
+    // Used to clear the static cached instance of ImeUtil during testing.  This is necessary
+    // because a previous test may have installed a mocked instance (or vice versa).
+    public static void clearInstance() {
+        sInstance = null;
+    }
+    public static ImeUtil get() {
+        if (sInstance == null) {
+            synchronized (ImeUtil.class) {
+                if (sInstance == null) {
+                    sInstance = new ImeUtil();
+                }
+            }
+        }
+        return sInstance;
+    }
+
+    @VisibleForTesting
+    public static void set(final ImeUtil imeUtil) {
+        sInstance = imeUtil;
+    }
+
+    public void hideImeKeyboard(@NonNull final Context context, @NonNull final View v) {
+        Assert.notNull(context);
+        Assert.notNull(v);
+
+        final InputMethodManager inputMethodManager =
+                (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
+        if (inputMethodManager != null) {
+            inputMethodManager.hideSoftInputFromWindow(v.getWindowToken(), 0 /* flags */);
+        }
+    }
+
+    public void showImeKeyboard(@NonNull final Context context, @NonNull final View v) {
+        Assert.notNull(context);
+        Assert.notNull(v);
+
+        final InputMethodManager inputMethodManager =
+                (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
+        if (inputMethodManager != null) {
+            v.requestFocus();
+            inputMethodManager.showSoftInput(v, 0 /* flags */);
+        }
+    }
+
+    public static void hideSoftInput(@NonNull final Context context, @NonNull final View v) {
+        final InputMethodManager inputMethodManager =
+                (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
+        inputMethodManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
+    }
+}