ListView控件 - - 从数据库中删除项目的Andr​​oid [英] Delete item from database - ListView - Android

问题描述

public class DataViewActivity extends Activity{
SQLiteDatabase db;
SimpleCursorAdapter adapter;
String dbTable = "users";

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview_layout);
ListView listView = (ListView) findViewById(R.id.dbPop);

DBHelper dbhelper = new DBHelper(DataViewActivity.this);
db = dbhelper.getWritableDatabase();

Cursor cursor = db.query(dbTable, null, null, null, null, null, null);
startManagingCursor(cursor);

String[] from = new String[] { "name","_id"};
int[] to = new int[] { android.R.id.text1 };
adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, cursor, from,
        to);

    listView.setAdapter(adapter);
  }
}

如何实现的onClick监听器此code删除所选数据库行。我不知道很多关于Android所以对我来说它是一个学习曲线。

How to implement onClick listener to this code to delete selected database row. I don't know much about Android so for me its a learning curve.

推荐答案

设置 setOnItemClickListener 您的ListView ...

set setOnItemClickListener to your listview...

listview.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {

            database.remove(id);//create removemethod in database class

        }
    });

和remove方法

    public void remove(long id){
        String string =String.valueOf(id);
        database.execSQL("DELETE FROM favorite WHERE _id = '" + string + "'");
    }

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