Mam problem. Przed zmianą w moim pliku XML mój listview był w stanie działać idealnie. Ale teraz, po pewnych modyfikacjach w xml, nie działa poprawnie. Moja lista jest niestandardowa. Dlatego utworzyłem osobny plik xml, aby renderować każdy pojedynczy wiersz w widoku listy.Kliknięcie elementu z widoku listy
My single row.xml kod:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:id="@+id/relativeLayoutSingleRowManageAddictions"
android:layout_height="40dp"
android:background="@drawable/box_midbg" >
<TextView
android:id="@+id/textViewSingleRowManageAddictions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="17dp"
android:text="TextView"
android:textSize="20dp"
android:textColor="#ffffff" />
<ImageView
android:id="@+id/imageViewSingleRowManageAddictions"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="18dp"
android:src="@drawable/listing_arrow" />
</RelativeLayout>
My main.xml kod gdzie rezyduje ListView:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/main_bg_edited" >
<RelativeLayout
android:id="@+id/relativeLayout1"
style="@style/top_bar_style" >
<ImageView
android:id="@+id/imageViewMAnageAddictionsBack"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:src="@drawable/back_arrow"
android:clickable="true" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/header_style"
android:text="Manage Addictions" />
<ImageView
android:id="@+id/imageViewManageAddictionsAdd"
android:layout_width="25dp"
android:layout_height="20dp"
android:layout_marginRight="3dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:src="@drawable/plus_nav"
android:clickable="true" />
</RelativeLayout>
<ListView
android:id="@+id/listViewManageAddictions"
android:layout_width="290dp"
android:layout_height="fill_parent"
android:layout_below="@+id/relativeLayout1"
android:layout_centerHorizontal="true"
android:layout_centerInParent="true"
android:layout_marginTop="12dp"
android:divider="@android:color/transparent"
android:dividerHeight="2dp" />
</RelativeLayout>
A mój kod Java dla niego:
package com.addictioncounterapp;
import java.util.ArrayList;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
public class ManageAddictionList extends Activity {
ImageView iv_manage_addictions_back, iv_manage_addictions_add;
ListView listview;
ArrayList <String> arraylist_manage_addiction;
ArrayAdapter <String> arrayadapter_manage_addiction;
SQLiteDatabase database;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_manage_addiction_list);
loaddatabase();
iv_manage_addictions_back = (ImageView) findViewById(R.id.imageViewMAnageAddictionsBack);
iv_manage_addictions_back.setClickable(true);
iv_manage_addictions_back.setOnClickListener(new OnClickListener() {@Override
public void onClick(View v) {
startActivity(new Intent(ManageAddictionList.this, Settings.class));
}
});
iv_manage_addictions_add = (ImageView) findViewById(R.id.imageViewManageAddictionsAdd);
iv_manage_addictions_add.setClickable(true);
iv_manage_addictions_add.setOnClickListener(new OnClickListener() {@Override
public void onClick(View v) {
Intent intent = new Intent(ManageAddictionList.this, MainActivity.class);
intent.putExtra("name", "");
intent.putExtra("unit", "");
intent.putExtra("attribute", "");
intent.putExtra("limit", "");
intent.putExtra("operation", "Add Addiction");
startActivity(intent);
}
});
arraylist_manage_addiction = new ArrayList <String>();
manageList();
listview = (ListView) findViewById(R.id.listViewManageAddictions);
if (arraylist_manage_addiction.isEmpty()) Toast.makeText(getBaseContext(), "No Addictions found to manage. Click on 'add' button to create new Addiction.", Toast.LENGTH_SHORT)
.show();
else listview.setAdapter(arrayadapter_manage_addiction);
listview.setOnItemClickListener(new OnItemClickListener() {@Override
public void onItemClick(AdapterView <? > arg0, View arg1, int arg2, long arg3) {
String name = null, attribute = null, unit = null, limit = null;
View parentView = (View) arg0.getParent();
name = ((TextView) parentView.findViewById(R.id.textViewSingleRowManageAddictions))
.getText() + "";
Toast.makeText(getBaseContext(), name, Toast.LENGTH_SHORT)
.show();
int cat_id = 0;
//--------Fetching cat_id through name from the list--------
Cursor cursor;
cursor = database.query("category", new String[] {
"cat_id"
}, new String("cat_name=?"), new String[] {
name
}, null, null, null);
if (cursor.getCount() > 0) {
while (cursor.moveToNext())
cat_id = cursor.getInt(0);
cursor.close();
}
//--------Fetching unit, attribute, limit through cat_id from the list--------
cursor = database.query("category_attribute", new String[] {
"cat_attribute_name", "cat_attribute_unit", "cat_limit"
}, new String("cat_id=?"), new String[] {
cat_id + ""
}, null, null, null);
if (cursor.getCount() > 0) {
while (cursor.moveToNext()) {
attribute = cursor.getString(0);
unit = cursor.getString(1);
limit = cursor.getString(2);
}
cursor.close();
}
Intent intent = new Intent(ManageAddictionList.this, MainActivity.class);
intent.putExtra("name", name);
intent.putExtra("unit", unit);
intent.putExtra("attribute", attribute);
intent.putExtra("limit", limit);
intent.putExtra("cat_id", cat_id);
intent.putExtra("operation", "Edit Addiction");
startActivity(intent);
}
});
}
private void loaddatabase() {
database = openOrCreateDatabase("AddictionCounter.db", SQLiteDatabase.OPEN_READONLY, null);
}
private void manageList() {
String[] columns = {
"cat_name"
};
Cursor cursor;
cursor = database.query("category", columns, null, null, null, null, null);
if (cursor.getCount() > 0) {
while (cursor.moveToNext())
arraylist_manage_addiction.add(cursor.getString(0));
cursor.close();
}
arrayadapter_manage_addiction = new ArrayAdapter <String> (this, R.layout.single_row_manage_addictions, R.id.textViewSingleRowManageAddictions, arraylist_manage_addiction);
}
}
Główny błąd za tym jest to, że gdy otrzymam nazwę z tego powodu:
View parentView = (View) arg0.getParent();
name = ((TextView) parentView.findViewById(R.id.textViewSingleRowManageAddictions)).getText()+"";
listview dowolnego rekordu, podaje tylko nazwę pierwszego rekordu. Na przykład, jeśli mój pierwszy wiersz ma widok tekstowy o nazwie "Gaming", po kliknięciu dowolnego wiersza (w celu debugowania użyłem Toast.makeText(...))
go Toasts "Gaming" jako nazwy dla każdego rekordu w liście, chociaż każdy rekord w ListView jest wyjątkowy. Proszę mi pomóc z tym.
'arg0' to ListView ... użyć' arg1' który swoją kliknięciu wiersz ... – Selvin
... w każdym razie dla klikniętego elementu tylko PRZYGOTOWANIA lepiej jest użyć 'String name = (String) agr0.getAdapter(). getItem (arg2); ' – Selvin
@Selvin masz rację. Mam to. Doceniony. –