仿qq登录界面

  1 public class LoginTest_Activity extends Activity implements Callback {
  2 
  3     private PopupWindow mPopupWindow;// 浮动窗口
  4     private UOptionsAdapter mOptionsAdapter;//适配器
  5     private List<String> mUserNames;// 保存用户名
  6     private List<String> mPassWords;// 保存密码
  7     private List<DBLoginInfoObj> infoObjs;// 保存登陆信息数据对象
  8     private LinearLayout parent;//浮动窗口依附布局
  9     private int pwidth;// 浮动宽口的宽度
 10 
 11     private EditText login_edit_userName;// 账号输入框
 12     private EditText login_edit_password;// 密码输入框
 13     private Button down_but;
 14     private Button login_but;
 15     private Handler mHandler;// 处理消息更新UI
 16     private boolean init_flag = false;// 浮动窗口显示标示符
 17     private static final String TBL_LOGIN_INFO = "LoginInfo";// 用户登陆信息
 18 
 19     @Override
 20     protected void onCreate(Bundle savedInstanceState) {
 21         super.onCreate(savedInstanceState);
 22         setContentView(R.layout.activity_logintest);
 23         // 初始化
 24         this.mUserNames = new ArrayList<String>();
 25         this.mPassWords = new ArrayList<String>();
 26         this.infoObjs = new ArrayList<DBLoginInfoObj>();
 27         this.mHandler = new Handler(this);
 28     }
 29 
 30     /**
 31      * 在此方法中初始化可以获得输入框的宽度，以便于创建同样宽的浮动窗口
 32      */
 33     @Override
 34     public void onWindowFocusChanged(boolean hasFocus) {
 35         // TODO Auto-generated method stub
 36         super.onWindowFocusChanged(hasFocus);
 37         while (!init_flag) {
 38             // 初始化UI
 39             initWedget();
 40             // 初始化浮动窗口
 41             initPopuWindow();
 42             init_flag = true;
 43         }
 44     }
 45 
 46     /**
 47      * 初始化UI控件
 48      */
 49     private void initWedget() {
 50         // 浮动窗口依附的布局
 51         this.parent = (LinearLayout) this.findViewById(R.id.username_layout);
 52         this.login_edit_userName = (EditText) this
 53                 .findViewById(R.id.login_edit_userName);
 54         this.login_edit_password = (EditText) this
 55                 .findViewById(R.id.login_edit_password);
 56         this.down_but = (Button) this.findViewById(R.id.down_but);
 57         login_but = (Button) this.findViewById(R.id.login_but_landing);
 58         // 获取登陆数据
 59         getData();
 60         this.login_edit_userName.setText(this.mUserNames.get(0));
 61         this.login_edit_password.setText(this.mPassWords.get(0));
 62 
 63         // 获取地址输入框的宽度，用于创建浮动窗口的宽度
 64         int w = parent.getWidth();
 65         pwidth = w;
 66 
 67         down_but.setOnClickListener(Listener_but);
 68         login_but.setOnClickListener(Listener_but);
 69 
 70     }
 71 
 72     /**
 73      * 初始化浮动窗口
 74      */
 75     public void initPopuWindow() {
 76         // 浮动窗口的布局
 77         View loginwindow = (View) this.getLayoutInflater().inflate(
 78                 R.layout.activity_options, null);
 79         ListView listView = (ListView) loginwindow.findViewById(R.id.list);
 80         // 初始化适配器
 81         this.mOptionsAdapter = new UOptionsAdapter(LoginTest_Activity.this,
 82                 mUserNames, mHandler);
 83         listView.setAdapter(mOptionsAdapter);
 84         // 定义一个浮动窗口，并设置
 85         this.mPopupWindow = new PopupWindow(loginwindow, pwidth,
 86                 LayoutParams.WRAP_CONTENT, true);
 87         this.mPopupWindow.setOutsideTouchable(true);
 88         this.mPopupWindow.setBackgroundDrawable(new BitmapDrawable());
 89 
 90     }
 91 
 92     /**
 93      * 获取登录用户名数据
 94      */
 95     private void getData() {
 96         //获取数据对象
 97         LoginInfoHandler mHandler = LoginInfoHandler
 98                 .create(LoginTest_Activity.this);
 99         this.infoObjs = mHandler.getLoginInfoObj();
100         for (int i = 0; i < this.infoObjs.size(); i++) {
101             this.mUserNames.add(this.infoObjs.get(i).getUserName());
102             this.mPassWords.add(this.infoObjs.get(i).getPassword());
103         }
104 
105     }
106 
107     /**
108      * 按钮点击事件
109      */
110     OnClickListener Listener_but = new OnClickListener() {
111 
112         @Override
113         public void onClick(View v) {
114             // TODO Auto-generated method stub
115             switch (v.getId()) {
116             case R.id.down_but:// 浮动地址下拉框按钮事件
117                 if (init_flag) {
118                     // 显示浮动窗口
119                     mPopupWindow.showAsDropDown(parent, 0, -3);
120                 }
121                 break;
122             case R.id.login_but_landing:// 登录按钮事件
123                 // 登录成功将数据保存到SQLite中
124                 ContentValues values = new ContentValues();
125                 String userName = login_edit_userName.getText().toString();
126                 String passWord = login_edit_password.getText().toString();
127                 values.put("UserName", userName);
128                 values.put("PassWord", passWord);
129                 DBHelper dbHelper = new DBHelper(LoginTest_Activity.this);
130                 // 第一次登陆直接保存
131                 if (mUserNames.size() == 0) {
132                     dbHelper.insert(values, TBL_LOGIN_INFO);
133                 } else {
134                     // 标示符是否要插入
135                     boolean flag = false;
136                     // 判断当前用户名是否在数据库存在
137                     LoginInfoHandler mHandler = LoginInfoHandler
138                             .create(LoginTest_Activity.this);
139                     List<DBLoginInfoObj> info = mHandler.getLoginInfoObj();
140                     for (int i = 0; i < info.size(); i++) {
141                         String username = info.get(i).getUserName();
142                         if (userName.equals(username)) {
143                             flag = true;
144                         }
145                     }
146                     if (!flag) {
147                         dbHelper.insert(values, TBL_LOGIN_INFO);
148                     }
149                 }
150                 Toast.makeText(LoginTest_Activity.this, "登陆成功", 1);
151                 break;
152 
153             }
154 
155         }
156     };
157 
158     /**
159      * 处理浮动窗口传回来的数据
160      * 
161      * @param msg
162      * @return
163      */
164     @Override
165     public boolean handleMessage(Message msg) {
166         // TODO Auto-generated method stub
167         Bundle bundle = msg.getData();
168         DBHelper dbHelper = new DBHelper(LoginTest_Activity.this);
169         switch (msg.what) {
170         case 1:// 根据返回的id，将数据显示在输入框中
171             int sel_id = bundle.getInt("sel_id");
172             int _id = infoObjs.get(sel_id).getID();
173             String UserName = infoObjs.get(sel_id).getUserName();
174             String PassWord = infoObjs.get(sel_id).getPassword();
175             // 先删除再插入
176             dbHelper.del(_id, TBL_LOGIN_INFO);
177             login_edit_userName.setText(UserName);
178             login_edit_password.setText(PassWord);
179             mPopupWindow.dismiss();
180             break;
181         case 2:// 根据返回的ID，删除数据
182             int del_id = bundle.getInt("del_id");
183             int id = infoObjs.get(del_id).getID();
184             dbHelper.del(id, TBL_LOGIN_INFO);
185             mUserNames.remove(del_id);
186             mOptionsAdapter.notifyDataSetChanged();
187             break;
188         }
189         return false;
190     }

 1 public class UOptionsAdapter extends BaseAdapter {
 2 
 3     private Context mContext;
 4     private List<String> mDtatList;// 显示数据
 5     private Handler mHandler;// 传递消息
 6 
 7     public UOptionsAdapter(Context context, List<String> list, Handler handler) {
 8         // TODO Auto-generated constructor stub
 9         this.mContext = context;
10         this.mDtatList = list;
11         this.mHandler = handler;
12     }
13 
14     @Override
15     public int getCount() {
16         // TODO Auto-generated method stub
17         return mDtatList.size();
18     }
19 
20     @Override
21     public Object getItem(int position) {
22         // TODO Auto-generated method stub
23         return mDtatList.get(position);
24     }
25 
26     @Override
27     public long getItemId(int position) {
28         // TODO Auto-generated method stub
29         return position;
30     }
31 
32     @Override
33     public View getView(int position, View convertView, ViewGroup parent) {
34         // TODO Auto-generated method stub
35         ViewHolder holder = null;
36         if (convertView == null) {
37             holder = new ViewHolder();
38             convertView = LayoutInflater.from(mContext).inflate(
39                     R.layout.option_item, null);
40             holder.textView = (TextView) convertView.findViewById(R.id.tv);
41             holder.button = (Button) convertView.findViewById(R.id.del_but);
42 
43             convertView.setTag(holder);
44         } else {
45             holder = (ViewHolder) convertView.getTag();
46         }
47 
48         // 给textView和button设置唯一标示
49         holder.textView.setTag(position);
50         holder.button.setTag(position);
51         holder.textView.setText(mDtatList.get(position));
52         holder.textView.setOnClickListener(new View.OnClickListener() {
53 
54             @Override
55             public void onClick(View v) {
56                 // TODO Auto-generated method stub
57                 Message msg = new Message();
58                 Bundle bundle = new Bundle();
59                 int id = Integer.parseInt(v.getTag().toString());
60                 bundle.putInt("sel_id", id);
61                 msg.setData(bundle);
62                 msg.what = 1;
63                 mHandler.sendMessage(msg);
64             }
65         });
66 
67         holder.button.setOnClickListener(new View.OnClickListener() {
68 
69             @Override
70             public void onClick(View v) {
71                 // TODO Auto-generated method stub
72                 Message msg = new Message();
73                 Bundle bundle = new Bundle();
74                 bundle.putInt("del_id", Integer.parseInt(v.getTag().toString()));
75                 msg.setData(bundle);
76                 msg.what = 2;
77 
78                 mHandler.sendMessage(msg);
79 
80             }
81         });
82 
83         return convertView;
84     }
85 
86     public class ViewHolder {
87         TextView textView;
88         Button button;
89     }

 1 public class DBLoginInfoObj {
 2     private int ID;// 数据库中的ID
 3     private String UserName;// 账号
 4     private String Password;// 密码
 5 
 6     public int getID() {
 7         return ID;
 8     }
 9 
10     public void setID(int iD) {
11         ID = iD;
12     }
13 
14     public String getUserName() {
15         return UserName;
16     }
17 
18     public void setUserName(String userName) {
19         UserName = userName;
20     }
21 
22     public String getPassword() {
23         return Password;
24     }
25 
26     public void setPassword(String password) {
27         Password = password;
28     }

 1 public class LoginInfoHandler {
 2 
 3     private static LoginInfoHandler mHandler;
 4     private Context context;
 5     private static final String TBL_LOGIN_INFO = "LoginInfo";// 用户登陆信息
 6     private final String PREFS_NAME = "com.example.logintestdome";
 7 
 8     /**
 9      * 私有构造函数
10      */
11     private LoginInfoHandler(Context context) {
12         this.context = context;
13     }
14 
15     /**
16      * 单例模式——保证对象唯一性
17      * 
18      * @return
19      */
20     public static LoginInfoHandler create(Context context) {
21         if (mHandler == null) {
22             mHandler = new LoginInfoHandler(context);
23         }
24         return mHandler;
25     }
26 
27     /**
28      * 获取用户登陆信息
29      * 
30      * @return
31      */
32     public List<DBLoginInfoObj> getLoginInfoObj() {
33         List<DBLoginInfoObj> infoObjs = new ArrayList<DBLoginInfoObj>();
34         DBHelper dbHelper = new DBHelper(context);
35         Cursor c = null;
36         try {
37             c = dbHelper.quertAll(TBL_LOGIN_INFO);
38             for (c.moveToLast(); !c.isBeforeFirst(); c.moveToPrevious()) {
39                 DBLoginInfoObj infoObj = new DBLoginInfoObj();
40                 infoObj.setID(c.getInt(c.getColumnIndex("_id")));
41                 infoObj.setUserName(c.getString(c.getColumnIndex("UserName")));
42                 infoObj.setPassword(c.getString(c.getColumnIndex("PassWord")));
43                 infoObjs.add(infoObj);
44 
45             }
46         } catch (Exception e) {
47             // TODO: handle exception
48             Log.i("数据库异常：", e.toString());
49         } finally {
50             // 关闭游标
51             c.close();
52         }
53         return infoObjs;
54     }

 1 public class DBHelper extends SQLiteOpenHelper {
 2 
 3     private static final String DB_NAME = "LoginTest.db";
 4     private static final String TBL_LOGIN_INFO = "LoginInfo";// 用户IP地址
 5 
 6     private static final String CREATE_TBL_LOGININFO = "create table LoginInfo(_id integer primary key autoincrement,UserName text,PassWord text)";
 7     
 8 
 9     private SQLiteDatabase db;
10 
11     public DBHelper(Context context) {
12         super(context, DB_NAME, null, 2);
13         // TODO Auto-generated constructor stub
14     }
15 
16     @Override
17     public void onCreate(SQLiteDatabase arg0) {
18         // TODO Auto-generated method stub
19         // 当数据库被第一次创建时调用
20         this.db = arg0;    
21         db.execSQL(CREATE_TBL_LOGININFO);
22 
23     }
24 
25     /**
26      * 向指定数据库中插入一条数据
27      * 
28      * @param values
29      *            ContentValues 键值对， 相当于map
30      * @param tableName
31      */
32     public void insert(ContentValues values, String tableName) {
33         SQLiteDatabase db = getWritableDatabase();
34         db.insert(tableName, null, values);
35         db.close();
36 
37     }
38 
39     /**
40      * 返回表中所有数据
41      * 
42      * @param tableName
43      * @return
44      */
45     public Cursor quertAll(String tableName) {
46         Cursor c = null;
47         SQLiteDatabase db = getWritableDatabase();
48         c = db.query(tableName, null, null, null, null, null, null);
49 
50         return c;
51     }
52 
53     /**
54      * 根据ID删除一条数据
55      * 
56      * @param id
57      * @param tableName
58      */
59     public void del(int id, String tableName) {
60 
61         if (db == null)
62             db = getWritableDatabase();
63         db.delete(tableName, "_id=?", new String[] { String.valueOf(id) });
64 
65     }
66 
67     @Override
68     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
69         // TODO Auto-generated method stub
70 
71     }