一个Android框架下实现登录和Google检索的应用程序

1.      需求设计
在Android的数据库创建一个login表，包括密码和账户两个字段

实现两个activity应用程序，其中一个，提供两个入力框，分别输入密码和账户，并且实现登录check

登录成功之后，跳转到第二个Activity，在其上实现一个入力框，根据输入的参数，到google上检索

2.      效果图
 

3.      主要代码
3.1    第一个Activity的代码

public class Android1 extends Activity {

      private Button mButton1;

      private TextView mTextView1;

      private TextView mTextView2;

      private String user = new String();

      private String password = new String();

      private DBHelper dbHelper;

      /** Called when the activity is first created. */

      @Override

      public void onCreate(Bundle savedInstanceState) {

           super.onCreate(savedInstanceState);

           setContentView(R.layout.main);

           mTextView1 = (TextView) findViewById(R.id.EditText01);

           mTextView2 = (TextView) findViewById(R.id.EditText02);

           dbHelper = new DBHelper(this, "TestDB");

           createTable();

      }

      public void onClick(View v) {

           // TODO Auto-generated method stub

           user = mTextView1.getText().toString();

           password = mTextView2.getText().toString();

           Boolean result = selectTable(user, password);

           Log.d("Android1", "the result is " + result);

           if (result == true) {

                 Intent intent = new Intent();

                 intent.setClass(Android1.this, Android2.class);

                 startActivity(intent);

           }

      }

      public void createTable() {

           SQLiteDatabase db = dbHelper.getWritableDatabase();

           db

                  &nbs