如何在片段中显示 sqlite 数据..！

Question

我有一个活动，我可以在其中放入 2 个文本并保存在数据库中 我有 3 个标签，每个标签都有不同的图片 请有人可以帮助我提供可以在每个选项卡上显示这两个文本的代码！不知道怎么弄！

SQLITE 活动：

表 1：

public class DataBaseHelper extends SQLiteOpenHelper {

public static final String DATABASE_NAME = "big.db";
public static final String TABLE_NAME = "images";
public static final String NAME = "name";
public static final String PLACE = "place";
public static final String KEY_ID = "id";


public DataBaseHelper(Context context) {

    super(context, DATABASE_NAME, null, 1);
    SQLiteDatabase db = this.getWritableDatabase();

}

@Override
public void onCreate(SQLiteDatabase db) {
    String CREATE_IMAGES_TABLE = "CREATE TABLE images ( " +
            "id" + "INTEGER PRIMARY KEY AUTOINCREMENT, " +

            "name TEXT, " +
            "place TEXT )";

    db.execSQL(CREATE_IMAGES_TABLE);
}


@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
    db.execSQL("DROP TABLE IF EXISTS images");
    this.onCreate(db);
}

public void insertentry(String name, String place) {

    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();
    contentValues.put(NAME, name);
    contentValues.put(PLACE, place);

    db.insert(TABLE_NAME, null, contentValues);
}

}

public class Tab1 extends Fragment {
    DataBaseHelper db;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.tab1, container, false);

    ImageView imageView = (ImageView) v.findViewById(R.id.img1);
    String photoPath = Environment.getExternalStorageDirectory() + "/Download/image1.jpg";
    Bitmap bitmap1 = BitmapFactory.decodeFile(photoPath);
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = 8;
    final Bitmap b = BitmapFactory.decodeFile(photoPath, options);

    imageView.setImageBitmap(b);


    return v;

}

Answer 1

只需使用以下代码从您的表中检索数据

class DbResponse{
public String name;
public String place;
}

现在

public DbResponse getData(){
  DbResponse obj = new DbResponse();
  SQLiteDatabase db = this.getWritableDatabase();
  Cursor cursor = db.rawQuery("select * from " + TABLE_NAME, null);
  if (cursor.getCount() > 0) {
        cursor.moveToFirst();
  obj.name = cursor.getString(cursor.getColumnIndex(NAME));
  obj.place = cursor.getString(cursor.getColumnIndex(PLACE));
  }
  cursor.close();
  return obj;
}

在你的片段类中写

DataBaseHelper db = new DataBaseHelper(getActivity());
DbResponse response = db.getData();

textview.setText(response.name+" - "+response.place);

希望对你有帮助