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Start your free trialJarrett Perkins
2,902 PointssetListAdapter(adapter) not working
My project is able to build and run on my device, except when I click on the 7 DAY button, the screen goes blank white when it should display the array of Strings daysOfTheWeek. My code is:
package com.teamtreehouse.stormy;
import android.app.ListActivity; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.widget.ArrayAdapter; import android.widget.ListView;
public class DailyForecastActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_daily_forecast);
String[] daysOfTheWeek = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, daysOfTheWeek);
setListAdapter(adapter);
}
}
2 Answers
David Axelrod
36,073 PointsI had the same error. make sure the code is within the onCreate method. There should be two curly braces after setListAdapter
Liam Peters
8,792 PointsDoes your R.layout.activity_daily_forecast
contain a listview with the ID "@android:id/list"
?
ListActivity by default has a layout. You using setContentView(...);
overrides this and it will look inside this layout for something with the id @android:id/list
Jarrett Perkins
2,902 PointsYes, my XML file does have a ListView with the id @android:id/list. Here is my XML code:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context="com.teamtreehouse.stormy.DailyForecastActivity" android:background="@drawable/bg_gradient" android:id="@android:id/empty">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@android:id/list"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/no_daily_forecast_data"
android:id="@android:id/empty"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:textColor="#ffffffff"/>
</RelativeLayout>
Liam Peters
8,792 PointsYour top level element (it's cut off, but I assume it's a relative layout) has the id "@android:id/empty" and so does the text view. I can only assume that's causing some issues.