Sprint 冲刺第三阶段第3-5天 数据库代码

数据库代码：

package com.example.brdemo;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    private Button btn1,btn2,btn3;
    private EditText edname,edsecret;
    Intent iguangs, iches;
    SQLiteDatabase db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn1 = (Button) findViewById(R.id.b1);// 注册
        btn2 = (Button) findViewById(R.id.bt3);// 测试
        btn3 = (Button) findViewById(R.id.b2);// 登录

        edname = (EditText) findViewById(R.id.editname);
        edsecret = (EditText) findViewById(R.id.editsecret);
      
        db=SQLiteDatabase.openOrCreateDatabase(this.getFilesDir().toString()+"/mydb.db3", null);
        // 注册
        btn1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                String title,content;
                 title=edname.getText().toString();
                 content=edsecret.getText().toString();
                try {
                    insertData(db, title, content);
                    Cursor cursor=db.rawQuery("select * from myTable", null);
                    inflateList(cursor);
                } catch (SQLiteException e) {
                    // TODO: handle exception
                    db.execSQL("create table myTable(_id integer"
                            +"primary key autonicrement,"
                            +"title varchar(50),"
                            + "content varchar(255))");
                    insertData(db, title, content);
                    Cursor cursor=db.rawQuery("select * from myTable", null);
                    inflateList(cursor);
                }
                Toast.makeText(MainActivity.this, "用户"+edname.getText() +"注册成功", Toast.LENGTH_LONG).show();
                iguangs = new Intent();
                Bundle bundle = new Bundle();
                iguangs.setClass(MainActivity.this, H.class);
                bundle.putString("userName", edname.getText().toString());
                bundle.putString("phoneNum", edsecret.getText().toString());
                iguangs.putExtras(bundle);
                // 启动Activity
                startActivity(iguangs);

            }

            private void inflateList(Cursor cursor) {
                // TODO Auto-generated method stub
                
            }

            private void insertData(SQLiteDatabase db, String title,
                    String content) {
                // TODO Auto-generated method stub
                
            }
        });
        // 测试
        btn2.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Uri uri = Uri.parse("http://open.taobao.com");
                 iches = new Intent(Intent.ACTION_VIEW, uri);
                startActivity(iches);
            }
        });
        // 登录
        btn3.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                iguangs = new Intent();
                Bundle bundle = new Bundle();
                iguangs.setClass(MainActivity.this, H.class);
                bundle.putString("userName", edname.getText().toString());
                bundle.putString("phoneNum", edsecret.getText().toString());
                
                Toast.makeText(MainActivity.this, "用户"+edname.getText() +"登录成功", Toast.LENGTH_LONG).show();
                iguangs.putExtras(bundle);
                // 启动Activity
                startActivity(iguangs);

            }
        });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        MenuInflater inflater = new MenuInflater(this);
        inflater.inflate(R.menu.main, menu);
        return super.onCreateOptionsMenu(menu);
    }

private void insertData(SQLiteDatabase db,String title,String content) {
    db.execSQL("insert into myTable values(null,?,?)",new String[]{title,content});
}

private void inflateList(Cursor cursor) {
    SimpleCursorAdapter simpleCursorAdapter=new SimpleCursorAdapter(MainActivity.this,
            R.layout.activity_main, cursor, new String[]{"title","content"}, 
            new int[]{R.id.editname,R.id.editsecret}, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
     
}
@Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        if (db!=null &&db.isOpen()) {
            db.close();
        }
}
}