Question

我提前道歉，我来自印度尼西亚，所以我的英语可能不太好...... 我只是通过谷歌翻译翻译我

我正在制作与sqlite相关联的Android应用。我有问题，我想根据所选的列表视图显示数据库中的数据。申请是我制作导游的应用程序。

在运行应用程序时，将会执行某些类别的现有景点。如果其中一个选定的类别，例如category：Nature，它将以数据库列表视图的形式显示自然界中存在的名称列表。

我设法把它弄到了这里。

之后，如果我选择其中一个自然名称，例如：Losari，它将根据数据库显示Losari的描述。

我很困惑如上所述如何显示.. 请帮帮我

此文件alam.java用于显示从数据库中检索数据的listview

dbadapter db;
protected Cursor cursor;
protected ListAdapter adapter;


public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.alam);
    final ListView dftAlam = (ListView)findViewById(R.id.lv);
    final dbadapter db = new dbadapter(this);
    ArrayList<DFT_ALAM> dft_alam = db.getAllAlam();
    dftAlam.setAdapter(new MyAdapter(this, dft_alam));

    dftAlam.setOnItemClickListener(new OnItemClickListener() {

        private String nama;
        private String alamat;
        private String desk;

        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            // TODO Auto-generated method stub
            String selectedItem = (String) dftAlam.getItemAtPosition(arg2);
            String query = "SELECT nama, alamat, desk FROM wisata WHERE nama = '" + selectedItem + "'";
            SQLiteDatabase dbs = db.getReadableDatabase();
            Cursor result = dbs.rawQuery(query, null);
            result.moveToFirst();
            nama = result.getString(result.getColumnIndex("nama"));
            alamat = result.getString(result.getColumnIndex("alamat"));
            desk = result.getString(result.getColumnIndex("desk"));
            Intent intent = new Intent(android.content.Intent.ACTION_VIEW, null, null, deskAlam.class);
            startActivity(intent); 

        }
    });

}
    public void onClick(View v) {


    }

}

此文件deskAlam.java将在listview

中显示所选选项的说明

dbadapter db;
TextView nama = null;
TextView alamat = null;
TextView desk = null;


public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.desk);

    TextView nama = (TextView)findViewById(R.id.nm);
    TextView alamat = (TextView)findViewById(R.id.alm);
    TextView desk = (TextView)findViewById(R.id.desk);
    dbadapter db = new dbadapter (this);
    db.openDataBase();
    Cursor c = (Cursor) db.getAllAlam();
    if (c.moveToFirst()){
        do{
            tampil(c);
        }while (c.moveToNext());
    }
}


public void tampil(Cursor c) {
    // TODO Auto-generated method stub
    Toast.makeText(this, c.getString(4) + "\n" +
                            c.getString(5) + "\n" +
                            c.getString(6), Toast.LENGTH_LONG).show();
}   

}

如果出现问题或者我上面提到的源代码较少，请修复它

Answer 1

您需要在onItemClick中执行以下操作：

listview.setOnItemClickListener(new OnItemClickListener() {

    @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                            long id) {
                Intent intent = new Intent(ThisActivity.this, NextActivity.class);
                intent.putExtra("chosen", position);
                startActivity(intent);
                }
        });

以及如何在下一个意图中获取数据：

int chosenPosition;
YourObject chosenObject;    
Bundle extras = getIntent().getExtras();

if (extras != null) {
    //Here you get the id from the item
    chosenPosition= (int)extras.getInt("chosen");
}   
//Here you use the id to get the object from your database or whatever
chosenObject = Database.getYourObject(chosenPosition+ 1);

如何通过ListView Android中的项目上的“onItemClick”从SQLite数据库获取数据

1 个答案: