1 /* 2 * Copyright (C) 2015 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.example.android.autobackupsample; 18 19 import android.app.Fragment; 20 import android.content.Intent; 21 import android.os.Bundle; 22 import android.os.Environment; 23 import android.util.Log; 24 import android.view.LayoutInflater; 25 import android.view.Menu; 26 import android.view.MenuInflater; 27 import android.view.MenuItem; 28 import android.view.View; 29 import android.view.ViewGroup; 30 import android.widget.ArrayAdapter; 31 import android.widget.ListView; 32 import android.widget.TextView; 33 34 import java.io.File; 35 import java.text.NumberFormat; 36 import java.util.ArrayList; 37 38 39 /** 40 * A placeholder fragment containing a simple view. 41 */ 42 public class MainActivityFragment extends Fragment { 43 44 private static final String TAG = "AutoBackupSample"; 45 public static final int ADD_FILE_REQUEST = 1; 46 public static final int ADD_FILE_RESULT_SUCCESS = 101; 47 public static final int ADD_FILE_RESULT_ERROR = 102; 48 49 private ArrayAdapter<File> mFilesArrayAdapter; 50 private ArrayList<File> mFiles; 51 MainActivityFragment()52 public MainActivityFragment() { 53 } 54 55 @Override onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)56 public View onCreateView(LayoutInflater inflater, ViewGroup container, 57 Bundle savedInstanceState) { 58 setHasOptionsMenu(true); 59 return inflater.inflate(R.layout.fragment_main, container, false); 60 } 61 62 @Override onActivityResult(int requestCode, int resultCode, Intent data)63 public void onActivityResult(int requestCode, int resultCode, Intent data) { 64 super.onActivityResult(requestCode, resultCode, data); 65 66 if (requestCode == ADD_FILE_REQUEST && resultCode == ADD_FILE_RESULT_SUCCESS) { 67 updateListOfFiles(); 68 } 69 } 70 71 @Override onCreateOptionsMenu(Menu menu, MenuInflater inflater)72 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 73 // Inflate the menu; this adds items to the action bar if it is present. 74 inflater.inflate(R.menu.menu_main, menu); 75 super.onCreateOptionsMenu(menu, inflater); 76 } 77 78 @Override onOptionsItemSelected(MenuItem item)79 public boolean onOptionsItemSelected(MenuItem item) { 80 // Handle action bar item clicks here. The action bar will 81 // automatically handle clicks on the Home/Up button, so long 82 // as you specify a parent activity in AndroidManifest.xml. 83 int id = item.getItemId(); 84 85 //noinspection SimplifiableIfStatement 86 if (id == R.id.action_settings) { 87 return true; 88 } else if (id == R.id.action_add_file) { 89 Intent addFileIntent = new Intent(getActivity(), AddFileActivity.class); 90 startActivityForResult(addFileIntent, ADD_FILE_REQUEST); 91 return true; 92 } 93 94 return super.onOptionsItemSelected(item); 95 } 96 97 @Override onResume()98 public void onResume() { 99 super.onResume(); 100 if (mFilesArrayAdapter == null) { 101 mFiles = createListOfFiles(); 102 mFilesArrayAdapter = new ArrayAdapter<File>(getActivity(), 103 R.layout.file_list_item, mFiles) { 104 105 @Override 106 public View getView(int position, View convertView, ViewGroup parent) { 107 LayoutInflater inflater = LayoutInflater.from(getContext()); 108 View itemView = inflater.inflate(R.layout.file_list_item, parent, false); 109 TextView fileNameView = (TextView) itemView.findViewById(R.id.file_name); 110 String fileName = getItem(position).getAbsolutePath(); 111 fileNameView.setText(fileName); 112 TextView fileSize = (TextView) itemView.findViewById(R.id.file_size); 113 String fileSizeInBytes = NumberFormat.getInstance() 114 .format(getItem(position).length()); 115 fileSize.setText(fileSizeInBytes); 116 return itemView; 117 } 118 }; 119 updateListOfFiles(); 120 ListView filesListView = (ListView) getView().findViewById(R.id.file_list); 121 filesListView.setAdapter(mFilesArrayAdapter); 122 } 123 } 124 createListOfFiles()125 private ArrayList<File> createListOfFiles() { 126 ArrayList<File> listOfFiles = new ArrayList<File>(); 127 addFilesToList(listOfFiles, getActivity().getFilesDir()); 128 if (Utils.isExternalStorageAvailable()) { 129 addFilesToList(listOfFiles, getActivity().getExternalFilesDir(null)); 130 } 131 addFilesToList(listOfFiles, getActivity().getNoBackupFilesDir()); 132 return listOfFiles; 133 } 134 addFilesToList(ArrayList<File> listOfFiles, File dir)135 private void addFilesToList(ArrayList<File> listOfFiles, File dir) { 136 File[] files = dir.listFiles(); 137 for (File file: files) { 138 listOfFiles.add(file); 139 } 140 } 141 updateListOfFiles()142 public void updateListOfFiles() { 143 TextView emptyFileListMessage = 144 (TextView) getView().findViewById(R.id.empty_file_list_message); 145 mFiles = createListOfFiles(); 146 if (mFilesArrayAdapter.getCount() > 0) { 147 mFilesArrayAdapter.clear(); 148 } 149 for (File file: mFiles) { 150 mFilesArrayAdapter.add(file); 151 } 152 // Display a message instructing to add files if no files found. 153 if (mFiles.size() == 0) { 154 emptyFileListMessage.setVisibility(View.VISIBLE); 155 } else { 156 emptyFileListMessage.setVisibility(View.GONE); 157 } 158 } 159 } 160 161