android support! thanks to TachiWeb devs.

AndroidCompat/src/main/java/android/app/PackageInstallObserver.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2014 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 android.app;
+import android.content.Intent;
+import android.os.Bundle;
+/** {@hide} */
+public class PackageInstallObserver {
+    public void onUserActionRequired(Intent intent) {
+    }
+    /**
+     * This method will be called to report the result of the package
+     * installation attempt.
+     *
+     * @param basePackageName Name of the package whose installation was
+     *            attempted
+     * @param extras If non-null, this Bundle contains extras providing
+     *            additional information about an install failure. See
+     *            {@link android.content.pm.PackageManager} for documentation
+     *            about which extras apply to various failures; in particular
+     *            the strings named EXTRA_FAILURE_*.
+     * @param returnCode The numeric success or failure code indicating the
+     *            basic outcome
+     * @hide
+     */
+    public void onPackageInstalled(String basePackageName, int returnCode, String msg,
+            Bundle extras) {
+    }
+}