上课没有认真听,不是很懂这里的context要写什么
还有我要如何调用这个类的DBOpenHelper呢,是创建好对象后调用open()函数吗?
PS:写代码时将DBOpenHelper改成了STOpenHelper
public class MainActivity extends AppCompatActivity {
private StAdapter stAdapter;
private Context context;
Button bt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
stAdapter = new StAdapter(context);
bt = (Button) findViewById(R.id.create_database);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
stAdapter.open();
}
});
}
}