android项目--超级简单的android通讯录
哥最近做了一个小项目《铁哥们通讯录》，作为练手项目给大家分享一下。
功能也很简单，一个主界面，然后在主界面弹出一个添加界面，一个信息列表。
其中只用到了1个activity，1个sqlite帮助类。
下面是activity类
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package com.feelling.ui; import java.util.ArrayList; import com.woz.util.Config;import com.woz.util.DataBaseHelper; import android.app.AlertDialog;import android.content.ContentValues;import android.content.DialogInterface;import android.database.Cursor;import android.database.sqlite.SQLiteDatabase;import android.os.Bundle;import android.view.KeyEvent;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener; import android.widget.Button;import android.widget.EditText; /**** * @production 铁哥们通讯录 * @company android技术帮--【技术成就梦想】 * @department 群号:85506951 * @author 良仔(qq:953486326) * {@docRoot 通讯录的启动初始化界面 } * @version 1.0 * @since 2011\9\21 * @see 欢迎对android感兴趣的童鞋加入android技术帮，共同学习，共同进步！ * ****/public class MainActivity extends ProDialogImp { /** Called when the activity is first created. *///---------- main ----------------Button addButton,queryButton; // 按钮-添加，查询//---------- add user ---------------- EditText username,phone; String userStr,phoneStr;//----------- list user ----------------------- @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // main addButton = (Button)findViewById(R.id.addUserBtn); queryButton = (Button)findViewById(R.id.listUserBtn); // 添加 addButton.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) { // 这里直接跳到添加的ui中去// setContentView(R.layout.add_user); LayoutInflater inflater = getLayoutInflater(); View layout = inflater.inflate(R.layout.add_user, (ViewGroup)findViewById(R.id.dialog)); // 内容元素 username = (EditText)layout.findViewById(R.id.userNameET); phone = (EditText)layout.findViewById(R.id.phoneNumberET); new AlertDialog.Builder(MainActivity.this).setTitle("添加联系人").setView(layout) .setPositiveButton("确定", new DialogInterface.OnClickListener() { //添加事件 public void onClick(DialogInterface dialog, int which) { // 这里直接跳到添加的ui中去 System.out.println(" on insert table user ---> "); DataBaseHelper dbHelper = new DataBaseHelper(MainActivity.this,Config.DB_NAME); SQLiteDatabase sdb = dbHelper.getWritableDatabase(); // put value userStr = username.getText().toString(); phoneStr = phone.getText().toString(); if(userStr!=null&&phoneStr!=null){ ContentValues cv = new ContentValues(); // cv.put("id", 1); cv.put("title", userStr); cv.put("content", phoneStr); sdb.insert(Config.TABLE_NAME, null, cv); showAlert("数据添加成功!"); }else{ showAlert("数据数据格式错误，请重新输入!"); } }}).setNegativeButton("取消", null).show(); }}); // 查询 queryButton.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) { DataBaseHelper dbHelper = new DataBaseHelper(MainActivity.this,Config.DB_NAME); SQLiteDatabase db = dbHelper.getReadableDatabase(); Cursor cs = db.query(Config.TABLE_NAME, new String[]{"_id","title","content"}, null, null, null, null, null); ArrayList<String> alist = new ArrayList<String>(); while(cs.moveToNext()){ int id = cs.getInt(cs.getColumnIndex("_id")); String name = cs.getString(cs.getColumnIndex("title")); String con = cs.getString(cs.getColumnIndex("content")); alist.add(id+"."+name+"["+con+"]"); System.out.println(" query [t_note]--> id = "+ id +" name = " + name +" con = " + con ); } final String[] contacts = new String[alist.size()]; for(int a=0;a<alist.size();a++){ contacts[a] = alist.get(a); } new AlertDialog.Builder(MainActivity.this).setTitle("内容列表").setIcon(android.R.drawable.ic_dialog_info).setItems( contacts, new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {//dialog.dismiss(); String artId = contacts[which].substring(0, 1); alertDeleteOpt(artId); // showAlert("msg --> " + artId);}}) .setNegativeButton("取消", null).show(); /* ListAdapter listapt = new SimpleCursorAdapter(MainActivity.this, android.R.layout.simple_expandable_list_item_1, cs, new String[]{"title"}, new int[]{android.R.id.text1} ); ListView listUser = new ListView(MainActivity.this); listUser.setAdapter(listapt); setContentView(listUser); */} }); } // 删除数据public void deleteData(String id){ DataBaseHelper dbHelper = new DataBaseHelper(MainActivity.this,Config.DB_NAME); SQLiteDatabase sdb = dbHelper.getWritableDatabase(); sdb.delete(Config.TABLE_NAME, " _id=?", new String[]{id}); //删除数据 } /** * 删除操作 */public void alertDeleteOpt(final String id){ new AlertDialog.Builder(this) .setCancelable(false) .setMessage("您确定要删除这条信息吗？") .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { deleteData(id); }}) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { dialog.cancel(); }}) .show(); } //退出程序 @Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK)// 返回按键 { new AlertDialog.Builder(this) .setCancelable(false) .setIcon(android.R.drawable.btn_star) .setTitle("退出") .setMessage("您确认要退出程序吗？") .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { MainActivity.this.finish(); //关闭程序的核心方法 }}) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { dialog.cancel(); }}) .show(); }return true;} }?下面sqlite帮助类，其他的不太重要，所以就放到附件了，欢迎大家下载共同讨论学习。
package com.woz.util;??import android.content.Context; import android.database.sqlite.SQLiteDatabase;import android.database.sqlite.SQLiteOpenHelper;import android.database.sqlite.SQLiteDatabase.CursorFactory; ? /**** ?* @production? 铁哥们通讯录?* @company???? android技术帮--【技术成就梦想】?* @department? 群号:85506951?* @author????? 良仔(qq:953486326)?* {@docRoot??? 访问sqlite数据的助手类 ?* 创建了一个note记录表?* ?* _id,???? 主键?* title,? 标题???? ?* content,内容??? }?* @version???? 1.0?* @since?????? 2011\9\21?* @see???????? 欢迎对android感兴趣的童鞋加入android技术帮，共同学习，共同进步！?* ****/public class DataBaseHelper extends SQLiteOpenHelper {??public DataBaseHelper(Context context, String name, CursorFactory factory,???int version) {??super(context, name, factory, version);??// TODO Auto-generated constructor stub?}?public DataBaseHelper(Context context, String name,? ???int version) {??this(context, name, null, version);??// TODO Auto-generated constructor stub?}?public DataBaseHelper(Context context, String name) {??this(context, name, Config.VERSION);??// TODO Auto-generated constructor stub?}? ?@Override?public void onCreate(SQLiteDatabase db) {??// TODO Auto-generated method stub??????? System.out.println(" create table --> ");??// 执行创建??????? db.execSQL("create table "+ Config.TABLE_NAME +??????? ???? "(_id INTEGER DEFAULT '1' NOT NULL PRIMARY KEY AUTOINCREMENT," +??????? ???? "title varchar(100)," +??????? ???? "content text)");???}
?@Override?public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {??// TODO Auto-generated method stub??????? System.out.println(" up grade datebase --> ");??????? db.execSQL("drop table " + Config.TABLE_NAME);??????? db.execSQL("create table "+ Config.TABLE_NAME +???? ??????? "(_id INTEGER DEFAULT '1' NOT NULL PRIMARY KEY AUTOINCREMENT," +???? ??????? "title varchar(100)," +???? ??????? "content text)");???} }