getting a string from a listview item in setOnItemClickListener

问题

I was wondering how I can get a string from a clicked listview's item. For example I have an entry in this format.

# - John Smith

john@gmail.com

3451234532

New York

I want to get John Smith. I can get the item on that position but I don't know the rest.

My codes:

package com.example.deneme;
import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;


public class Activity2 extends Activity {

private SQLiteAdapter mySQLiteAdapter;
 ListView listContent;
 SimpleCursorAdapter cursorAdapter;
 Cursor cursor;
 Button buttonDeleteAll,buttonDeleteRow;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.activity2);


buttonDeleteAll = (Button)findViewById(R.id.deleteall);
buttonDeleteRow = (Button)findViewById(R.id.deleterow); 
listContent = (ListView)findViewById(R.id.contentlist);
listContent.setClickable(true);
buttonDeleteAll.setOnClickListener(buttonDeleteAllOnClickListener);
buttonDeleteRow.setOnClickListener(buttonDeleteRowOnClickListener);


mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToWrite();



cursor = mySQLiteAdapter.queueAll();
String[] from = new String[]{ SQLiteAdapter.COLUMN_NAME, SQLiteAdapter.COLUMN_EMAIL,SQLiteAdapter.COLUMN_PHONE, SQLiteAdapter.COLUMN_ADDRESS};

int[] to = new int[]{R.id.text1, R.id.text2,R.id.text3, R.id.text4};

cursorAdapter = new SimpleCursorAdapter(this, R.layout.row, cursor, from, to);
listContent.setAdapter(cursorAdapter);



listContent.setOnItemClickListener(new OnItemClickListener() {

    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {

        String str = ((TextView)arg1).getText().toString();
        Toast.makeText(Activity2.this, str, Toast.LENGTH_SHORT).show();
    }
});



}


   Button.OnClickListener buttonDeleteRowOnClickListener = new Button.OnClickListener(){

       public void onClick(View arg0) {

     //    String n = inputContent1.getText().toString();
     //    mySQLiteAdapter.deleteRow(n);
           updateList();
           Toast.makeText(Activity2.this, "Entry Deleted", Toast.LENGTH_SHORT).show();      


       }
        };

        Button.OnClickListener buttonDeleteAllOnClickListener
        = new Button.OnClickListener(){
       public void onClick(View arg0) {

        mySQLiteAdapter.deleteAll();
        updateList();
        Toast.makeText(Activity2.this, "All Entries Deleted", Toast.LENGTH_SHORT).show();      

       }
        };

        private void updateList(){
              cursor.requery();
               }
}

After using your way, I got hese errors:

07-27 07:52:15.726: E/AndroidRuntime(856): FATAL EXCEPTION: main
07-27 07:52:15.726: E/AndroidRuntime(856): java.lang.ClassCastException:              android.widget.LinearLayout
07-27 07:52:15.726: E/AndroidRuntime(856):  at  com.example.deneme.Activity2$3.onItemClick(Activity2.java:58)
07-27 07:52:15.726: E/AndroidRuntime(856):  at android.widget.AdapterView.performItemClick(AdapterView.java:284)
07-27 07:52:15.726: E/AndroidRuntime(856):  at android.widget.ListView.performItemClick(ListView.java:3513)
07-27 07:52:15.726: E/AndroidRuntime(856):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:1812)

回答1:

Well, it depends on what you've populated your listview with. If those are TextView's then all you have to do is this:

((TextView)arg1).getText().toString()

Essentially View arg1 is the clicked View. Given that you've populated that list, you know what that view is, because you're the one who created and returned it in(in your adapter):

public View getView(int position, View convertView, ViewGroup parent)

Therefore, whatever the type of that View, check its the documentation to see how to get the text out of it

Edit:

Well, the cursor adapter you're using returns a LinearLayout for each row. It has several TextViews, one for each column that's selected. To get the first column you do this:

LinearLayout row = (LinearLayout)((LinearLayout)arg1).getChildAt(0);
TextView column = (TextView)row.getChildAt(0);
String text = column.getText().toString();

If you want a different column just change the argument to getChildAt(i)

回答2:

listContent.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView parent, View v, int position, long id) {
        Cursor cursor = (Cursor) parent.getItemAtPosition(position);
        String name = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.COLUMN_EMAIL));
        Toast.makeText(Activity2.this, name, Toast.LENGTH_SHORT).show();
    }
});

回答3:

To get the text, just use

String item = ((TextView)arg1).getText().toString();

On another note, it would be helpful if you rename the arguments of the function you implement like:

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

Now you can clearly see what each parameter does.

来源：https://stackoverflow.com/questions/11683547/getting-a-string-from-a-listview-item-in-setonitemclicklistener

标签

android

android-listview