1 /* 2 * Copyright (C) 2018 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 package com.android.dumpviewer.pickers; 17 18 import android.app.Activity; 19 import android.content.Intent; 20 import android.os.AsyncTask; 21 import android.os.Bundle; 22 import android.text.Editable; 23 import android.text.TextUtils; 24 import android.text.TextWatcher; 25 import android.view.View; 26 import android.widget.AdapterView; 27 import android.widget.ArrayAdapter; 28 import android.widget.AutoCompleteTextView; 29 import android.widget.ListView; 30 31 import com.android.dumpviewer.R; 32 33 import java.util.ArrayList; 34 35 import androidx.annotation.Nullable; 36 import androidx.appcompat.app.AppCompatActivity; 37 38 public abstract class PickerActivity extends AppCompatActivity { getList()39 protected abstract String[] getList(); 40 41 private static final String KEY_SELECTION = "KEY_SELECTION"; 42 43 private AutoCompleteTextView mSearch; // TODO Save history? Would that be really useful? 44 45 private ArrayAdapter<String> mAdapter; 46 private ListView mList; 47 48 private String[] mAllItems; 49 private String mFilter = ""; 50 51 @Override onCreate(@ullable Bundle savedInstanceState)52 protected void onCreate(@Nullable Bundle savedInstanceState) { 53 super.onCreate(savedInstanceState); 54 55 setContentView(R.layout.picker); 56 57 mSearch = findViewById(R.id.search); 58 59 mAdapter = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line); 60 61 mList = findViewById(R.id.list); 62 mList.setAdapter(mAdapter); 63 64 mSearch.addTextChangedListener(new TextWatcher() { 65 @Override 66 public void beforeTextChanged(CharSequence s, int start, int count, int after) { 67 } 68 69 @Override 70 public void onTextChanged(CharSequence s, int start, int before, int count) { 71 } 72 73 @Override 74 public void afterTextChanged(Editable s) { 75 mFilter = s.toString(); 76 refreshList(); 77 } 78 }); 79 mList.setOnItemClickListener(this::onListItemClicked); 80 81 mLoader.execute(); 82 } 83 84 @Override onDestroy()85 protected void onDestroy() { 86 mLoader.cancel(false); 87 super.onDestroy(); 88 } 89 getSelectedString(Intent i)90 public static String getSelectedString(Intent i) { 91 return i.getStringExtra(KEY_SELECTION); 92 } 93 getSelectedItem(int position)94 private String getSelectedItem(int position) { 95 final String val = mAdapter.getItem(position).toString(); 96 final int sepIndex = val.indexOf(' '); 97 if (sepIndex >= 0) { 98 return val.substring(0, sepIndex); 99 } 100 return val; 101 } 102 onListItemClicked(AdapterView<?> parent, View view, int position, long id)103 private void onListItemClicked(AdapterView<?> parent, View view, int position, long id) { 104 final Intent result = new Intent().putExtra(KEY_SELECTION, getSelectedItem(position)); 105 setResult(Activity.RESULT_OK, result); 106 finish(); 107 } 108 109 private final AsyncTask<Void, Void, String[]> mLoader = new AsyncTask<Void, Void, String[]>() { 110 @Override 111 protected String[] doInBackground(Void... voids) { 112 return getList(); 113 } 114 115 @Override 116 protected void onPostExecute(String[] list) { 117 if (list != null) { 118 mAllItems = list; 119 refreshList(); 120 } 121 } 122 }; 123 refreshList()124 private void refreshList() { 125 if (isDestroyed() || mAllItems == null) { 126 return; 127 } 128 final ArrayList<String> list = new ArrayList<>(mAllItems.length); 129 130 final String filter = mFilter.toLowerCase(); 131 for (String s : mAllItems) { 132 if (filter.length() == 0 || s.toLowerCase().contains(filter)) { 133 list.add(s); 134 } 135 } 136 mAdapter.clear(); 137 mAdapter.addAll(list); 138 } 139 } 140