CODEWITHSUNDEEP
javaandroidxmllistview
drew.neely
drew.neely

Reputation: 126

ListView will not display elements from Array : Android

I am trying to implement a ListView in an Android Application using Android Studio. I have followed three different tutorials, and done exactly as they instructed to no avail. The view loads, but the list does not display any elements.

SelectionActivity.java

package thosekids.com.finder_sohacks4;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.ArrayList;

public class SelectionActivity extends AppCompatActivity {

private ListView userList;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_selection);

    userList = (ListView) findViewById(R.id.userList);


    String[] users = {"U 1", "U 2", "U 3"};

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, users);
    userList.setAdapter(adapter);


}
}

activity_selection.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="thosekids.com.finder_sohacks4.SelectionActivity">

    <LinearLayout
        android:layout_width="368dp"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="8dp">

       <TextView
            android:id="@+id/searchingText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Who are you looking for?"
            android:textSize="20dp" />

        <ListView
            android:id="@+id/userList"
            android:layout_width="368dp"
            android:layout_height="427dp"
             />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Below Listview"
            />

    </LinearLayout>

Any and all help is appreciated! Thanks.

Upvotes: 0

Views: 1030

Answers (2)

Akshar Gabani
Akshar Gabani

Reputation: 15

activity_selection.xml file in "android.support.constraint.ConstraintLayout" replace with "RelativeLayout" and show all element in list view.

Upvotes: 1

Abhishek Kumar
Abhishek Kumar

Reputation: 1265

Follow My code and try to implement your code.

   package com.example.ListDisplay;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class ListDisplay extends Activity {
   // Array of strings...
   String[] mobileArray = {"Android","IPhone","WindowsMobile","Blackberry",
      "WebOS","Ubuntu","Windows7","Max OS X"};

   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);

      ArrayAdapter adapter = new ArrayAdapter<String>(this, 
         R.layout.activity_listview, mobileArray);

      ListView listView = (ListView) findViewById(R.id.mobile_list);
      listView.setAdapter(adapter);
   }
}

References:

https://www.tutorialspoint.com/android/android_list_view.htm

http://www.vogella.com/tutorials/AndroidListView/article.html

https://www.androidhive.info/2011/10/android-listview-tutorial/

Upvotes: 0

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