private SQLiteDatabase m_dbSQLiteDatabase=null; private TextView m_textview1=null; private static final int INFORMATIONACT=1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Intent intent = new Intent(MainActivity.this,yypService.class); startService(intent); m_textview1=(TextView)findViewById(R.id.textview1); //创建或打开数据库 Button button1=(Button)findViewById(R.id.button1); button1.setOnClickListener(new OnClickListener(){ public void onClick(View v){ m_dbSQLiteDatabase=OpenOrCreateDB(); if(m_dbSQLiteDatabase==null) m_textview1.setText("数据库打开失败!"); else m_textview1.setText("数据库打开成功!"); } private SQLiteDatabase OpenOrCreateDB() { SQLiteDatabase dbSQLiteDatabase=null; try{ dbSQLiteDatabase=SQLiteDatabase.openOrCreateDatabase("/data/data/com.example.demo_01/xiao.db",null); //以读写方式打开数据库 } catch(Exception ex){ return null; } return dbSQLiteDatabase; } });
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