From d704ae25525b27e2c03937ad35a32c05e58a4b3d Mon Sep 17 00:00:00 2001
From: Fyodor Kupolov <fkupolov@google.com>
Date: Mon, 13 Mar 2017 16:39:27 -0700
Subject: [PATCH] APK Cache Demo App

Simple app that lists files in the app's preloaded cache directory.
(/data/preloads/file_cache/com.android.apkcachetest)

Test: make ApkCacheTest
Bug: 38434471
Change-Id: Ia98650e41bc383d45ebf620bc065deb68076a75f
---
 samples/apkcachetest/Android.mk               | 30 ++++++++
 samples/apkcachetest/AndroidManifest.xml      | 31 +++++++++
 .../res/layout/hello_activity.xml             | 20 ++++++
 .../src/com/android/apkcachetest/Main.java    | 69 +++++++++++++++++++
 4 files changed, 150 insertions(+)
 create mode 100644 samples/apkcachetest/Android.mk
 create mode 100644 samples/apkcachetest/AndroidManifest.xml
 create mode 100644 samples/apkcachetest/res/layout/hello_activity.xml
 create mode 100644 samples/apkcachetest/src/com/android/apkcachetest/Main.java

diff --git a/samples/apkcachetest/Android.mk b/samples/apkcachetest/Android.mk
new file mode 100644
index 000000000..d7c7a444f
--- /dev/null
+++ b/samples/apkcachetest/Android.mk
@@ -0,0 +1,30 @@
+#
+# Copyright (C) 2016 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.
+#
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_PACKAGE_NAME := ApkCacheTest
+
+LOCAL_CERTIFICATE := shared
+
+LOCAL_PROGUARD_ENABLED := disabled
+
+include $(BUILD_PACKAGE)
diff --git a/samples/apkcachetest/AndroidManifest.xml b/samples/apkcachetest/AndroidManifest.xml
new file mode 100644
index 000000000..de8ac01a2
--- /dev/null
+++ b/samples/apkcachetest/AndroidManifest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ 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
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        package="com.android.apkcachetest" >
+
+    <application android:label="ApkCacheTest">
+        <activity android:name=".Main"  android:label="ApkCacheTest">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/samples/apkcachetest/res/layout/hello_activity.xml b/samples/apkcachetest/res/layout/hello_activity.xml
new file mode 100644
index 000000000..ae33e784c
--- /dev/null
+++ b/samples/apkcachetest/res/layout/hello_activity.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ 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
+  -->
+
+<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content" />
\ No newline at end of file
diff --git a/samples/apkcachetest/src/com/android/apkcachetest/Main.java b/samples/apkcachetest/src/com/android/apkcachetest/Main.java
new file mode 100644
index 000000000..7fb45575b
--- /dev/null
+++ b/samples/apkcachetest/src/com/android/apkcachetest/Main.java
@@ -0,0 +1,69 @@
+/*
+ * 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.apkcachetest;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.os.FileUtils;
+import android.widget.TextView;
+
+import java.io.File;
+import java.io.IOException;
+
+public class Main extends Activity {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.hello_activity);
+        File preloadsFileCache = getPreloadsFileCache();
+        TextView txt = (TextView) findViewById(R.id.text);
+        if (!getApplicationInfo().isPrivilegedApp()) {
+            txt.append("WARNING: App must be installed in /system/priv-app directory to access "
+                    + "preloads cache\n");
+        }
+        txt.append("PreloadsFileCache app directory: " + preloadsFileCache + '\n');
+        if (!preloadsFileCache.exists()) {
+            txt.append("   --- Directory does not exist ---\n");
+        } else {
+            File[] files = preloadsFileCache.listFiles();
+            if (files == null || files.length == 0) {
+                txt.append("   --- No files found ---\n");
+            } else {
+                for (File file : files) {
+                    try {
+                        txt.append("   " + file.getName() + ": [" + readTextFile(file) + "]\n");
+                    } catch (IOException e) {
+                        txt.append("   " + file.getName() + ": Error " + e + "\n");
+                        e.printStackTrace();
+                    }
+                }
+                txt.append(files.length + " files");
+            }
+
+        }
+    }
+
+    String readTextFile(File file) throws IOException {
+        String s = FileUtils.readTextFile(file, 100, "...");
+        if (s != null) {
+            s = s.replaceAll("[^\\x20-\\x7E]+", " ");
+        }
+        return s;
+    }
+}