实例介绍
【实例简介】
【实例截图】
【核心代码】
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | package com.example.searchview;import android.app.Activity;import android.database.Cursor;import android.os.Bundle;import android.os.Handler;import android.view.View;import android.widget.*; import java.util.ArrayList; public class MainActivity extends Activity implements SearchView.OnQueryTextListener, SearchView.OnCloseListener { private ListView myList; private SearchView searchView; private SearchHelper mDbHelper; private MyCustomAdapter defaultAdapter; private ArrayList<String> nameList; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); nameList = new ArrayList<String>(); //for simplicity we will add the same name for 20 times to populate the nameList view nameList.add("Aakash"); nameList.add("Sam"); nameList.add("Joe"); nameList.add("Salman"); nameList.add("Rahul"); nameList.add("Dave"); nameList.add("Rohit"); nameList.add("Kishan"); nameList.add("Janesh"); nameList.add("JD"); nameList.add("Aafghhh"); nameList.add("Ankit"); nameList.add("Diana"); //relate the listView from java to the one created in xml myList = (ListView) findViewById(R.id.list); //show the ListView on the screen // The adapter MyCustomAdapter is responsible for maintaining the data backing this nameList and for producing // a view to represent an item in that data set. defaultAdapter = new MyCustomAdapter(MainActivity.this, nameList); myList.setAdapter(defaultAdapter); //prepare the SearchView searchView = (SearchView) findViewById(R.id.search); //Sets the default or resting state of the search field. If true, a single search icon is shown by default and // expands to show the text field and other buttons when pressed. Also, if the default state is iconified, then it // collapses to that state when the close button is pressed. Changes to this property will take effect immediately. //The default value is true. searchView.setIconifiedByDefault(false); searchView.setOnQueryTextListener(this); searchView.setOnCloseListener(this); mDbHelper = new SearchHelper(this); mDbHelper.open(); //Clear all names mDbHelper.deleteAllNames(); // Create the list of names which will be displayed on search for (String name : nameList) { mDbHelper.createList(name); } } @Override protected void onDestroy() { super.onDestroy(); if (mDbHelper != null) { mDbHelper.close(); } } @Override public boolean onClose() { myList.setAdapter(defaultAdapter); return false; } @Override public boolean onQueryTextSubmit(String query) { displayResults(query "*"); return false; } @Override public boolean onQueryTextChange(String newText) { if (!newText.isEmpty()){ displayResults(newText "*"); } else { myList.setAdapter(defaultAdapter); } return false; } /** * Method used for performing the search and displaying the results. This method is called every time a letter * is introduced in the search field. * * @param query Query used for performing the search */ private void displayResults(String query) { Cursor cursor = mDbHelper.searchByInputText((query != null ? query : "@@@@")); if (cursor != null) { String[] from = new String[] {SearchHelper.COLUMN_NAME}; // Specify the view where we want the results to go int[] to = new int[] {R.id.search_result_text_view}; // Create a simple cursor adapter to keep the search data SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this, R.layout.result_search_item, cursor, from, to); myList.setAdapter(cursorAdapter); // Click listener for the searched item that was selected myList.setOnItemClickListener(new AdapterView.OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // Get the cursor, positioned to the corresponding row in the result set Cursor cursor = (Cursor) myList.getItemAtPosition(position); // Get the state's capital from this row in the database. String selectedName = cursor.getString(cursor.getColumnIndexOrThrow("name")); Toast.makeText(MainActivity.this, selectedName, Toast.LENGTH_SHORT).show(); // Set the default adapter myList.setAdapter(defaultAdapter); // Find the position for the original list by the selected name from search for (int pos = 0; pos < nameList.size(); pos ) { if (nameList.get(pos).equals(selectedName)){ position = pos; break; } } // Create a handler. This is necessary because the adapter has just been set on the list again and // the list might not be finished setting the adapter by the time we perform setSelection. Handler handler = new Handler(); final int finalPosition = position; handler.post(new Runnable() { @Override public void run() { myList.setSelection(finalPosition); } }); searchView.setQuery("",true); } }); } }} |
好例子网口号：伸出你的我的手 — 分享！
小贴士
感谢您为本站写下的评论，您的评论对其它用户来说具有重要的参考价值，所以请认真填写。
- 类似“顶”、“沙发”之类没有营养的文字，对勤劳贡献的楼主来说是令人沮丧的反馈信息。
- 相信您也不想看到一排文字/表情墙，所以请不要反馈意义不大的重复字符，也请尽量不要纯表情的回复。
- 提问之前请再仔细看一遍楼主的说明，或许是您遗漏了。
- 请勿到处挖坑绊人、招贴广告。既占空间让人厌烦，又没人会搭理，于人于己都无利。
关于好例子网
本站旨在为广大IT学习爱好者提供一个非营利性互相学习交流分享平台。本站所有资源都可以被免费获取学习研究。本站资源来自网友分享，对搜索内容的合法性不具有预见性、识别性、控制性，仅供学习研究，请务必在下载后24小时内给予删除，不得用于其他任何用途，否则后果自负。基于互联网的特殊性，平台无法对用户传输的作品、信息、内容的权属或合法性、安全性、合规性、真实性、科学性、完整权、有效性等进行实质审查；无论平台是否已进行审查，用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二与二十三条之规定，若资源存在侵权或相关问题请联系本站客服人员，点此联系我们。关于更多版权及免责申明参见 版权及免责申明
网友评论
我要评论