数据库创建

public class MyHelper extends SQLiteOpenHelper {
    public MyHelper(Context context) {
        super(context, "bawei.db", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        //创建表
        sqLiteDatabase.execSQL("create table jsoncache(id integer primary key autoincrement,json text not null,url text not null)");

    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {

    }
}