Add app compat test app.

Note: patch in http://aosp/1008615 in order to use this app.

Test: m CompatTestApp
Test: adb install -r out/soong/.intermediates/packages/experimental/\
      CompatTest/CompatTestApp/android_common/CompatTestApp.apk
Change-Id: Id75c4c34ec96336060554331daec0d755c386b3c

4 files changed, 158 insertions, 0 deletions

diff --git a/CompatTest/Android.bp b/CompatTest/Android.bp
new file mode 100644
index 0000000..856fee5
--- /dev/null
+++ b/CompatTest/Android.bp
@@ -0,0 +1,25 @@
+// Copyright (C) 2019 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.
+
+android_test_helper_app {
+    name: "CompatTestApp",
+    resource_dirs: ["res"],
+    sdk_version: "current",
+    srcs: [
+        "src/**/*.java",
+    ],
+    static_libs: [
+    ],
+
+}
diff --git a/CompatTest/AndroidManifest.xml b/CompatTest/AndroidManifest.xml
new file mode 100644
index 0000000..2b3a892
--- /dev/null
+++ b/CompatTest/AndroidManifest.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2019 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.
+  -->
+
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.compat.testapp">
+  <application>
+    <activity
+        android:name=".CompatActivity"
+        android:label="App Compat test"
+        android:exported="true">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN" />
+        <category android:name="android.intent.category.LAUNCHER" />
+      </intent-filter>
+    </activity>
+  </application>
+</manifest>
\ No newline at end of file
diff --git a/CompatTest/res/layout/main.xml b/CompatTest/res/layout/main.xml
new file mode 100644
index 0000000..23c2033
--- /dev/null
+++ b/CompatTest/res/layout/main.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2019 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
+  -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+    <Button
+            android:id="@+id/button1"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Click Me" />
+    <TextView
+            android:id="@+id/text"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:singleLine="false"
+            />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/CompatTest/src/com/android/compat/testapp/CompatActivity.java b/CompatTest/src/com/android/compat/testapp/CompatActivity.java
new file mode 100644
index 0000000..2b7af88
--- /dev/null
+++ b/CompatTest/src/com/android/compat/testapp/CompatActivity.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2019 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.compat.testapp;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.TextView;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.lang.reflect.Method;
+
+public class CompatActivity extends Activity {
+
+    private static final String TAG = "CompatTest";
+
+    private TextView mText;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main);
+        mText = findViewById(R.id.text);
+        findViewById(R.id.button1).setOnClickListener(view -> {
+            try {
+                message("Returned: " + accessHiddenApi());
+            } catch (ReflectiveOperationException roe) {
+                message(roe);
+            }
+        });
+    }
+
+    private Object accessHiddenApi() throws ReflectiveOperationException {
+        // Note: this class does not exist. Patch in http://aosp/1008615 in order
+        // for this to work as intended.
+        Class<?> c = Class.forName("android.compattest.CompatTest");
+        Method m = c.getDeclaredMethod("testApi");
+        return m.invoke(null);
+    }
+
+    private void message(Throwable t) {
+        StringWriter s = new StringWriter();
+        t.printStackTrace(new PrintWriter(s));
+        message(s.toString());
+    }
+
+    private void message(String m) {
+        Log.d(TAG, m);
+        mText.setText(m);
+    }
+}
\ No newline at end of file