1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.apkcachetest; 18 19 import android.app.Activity; 20 import android.os.Bundle; 21 import android.os.FileUtils; 22 import android.widget.TextView; 23 24 import java.io.File; 25 import java.io.IOException; 26 27 public class Main extends Activity { 28 29 @Override 30 public void onCreate(Bundle savedInstanceState) { 31 super.onCreate(savedInstanceState); 32 33 setContentView(R.layout.hello_activity); 34 File preloadsFileCache = getPreloadsFileCache(); 35 TextView txt = (TextView) findViewById(R.id.text); 36 if (!getApplicationInfo().isPrivilegedApp()) { 37 txt.append("WARNING: App must be installed in /system/priv-app directory to access " 38 + "preloads cache\n"); 39 } 40 txt.append("PreloadsFileCache app directory: " + preloadsFileCache + '\n'); 41 if (!preloadsFileCache.exists()) { 42 txt.append(" --- Directory does not exist ---\n"); 43 } else { 44 File[] files = preloadsFileCache.listFiles(); 45 if (files == null || files.length == 0) { 46 txt.append(" --- No files found ---\n"); 47 } else { 48 for (File file : files) { 49 try { 50 txt.append(" " + file.getName() + ": [" + readTextFile(file) + "]\n"); 51 } catch (IOException e) { 52 txt.append(" " + file.getName() + ": Error " + e + "\n"); 53 e.printStackTrace(); 54 } 55 } 56 txt.append(files.length + " files"); 57 } 58 59 } 60 } 61 62 String readTextFile(File file) throws IOException { 63 String s = FileUtils.readTextFile(file, 100, "..."); 64 if (s != null) { 65 s = s.replaceAll("[^\\x20-\\x7E]+", " "); 66 } 67 return s; 68 } 69 } 70
