Tag Archives: AsyncTask

What are weak references? How it can be used to avoid memory leaks?

By | June 1, 2017

Weak reference objects, which do not prevent their referents from being made finalizable, finalized, and then reclaimed. Weak references are most often used to implement canonicalizing mappings. Suppose that the garbage collector determines at a certain point in time that an object is weakly reachable. At that time it will atomically clear all weak references to that object… Read More »

Swipe Refresh ListView using ListFragment and SwipeRefreshListFragment in Android

By | February 25, 2016

This demo shows How to use Swipe to Refresh in ListViews and ListViewFragments. You can download the complete Android Studio Source Code at the end of the Post. 1. Using ListFragment [java] package com.example.android.swiperefreshlistfragment; import android.content.Context; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.support.v4.view.ViewCompat; import android.support.v4.widget.SwipeRefreshLayout; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ListView; public class SwipeRefreshListFragment extends ListFragment {… Read More »

Display Route between two places in Google Maps V2

By | February 3, 2016

Hi all… Yet another post on Google Maps.. In this demo I will show you how to show a route between two places in Google Maps V2.     Hope you have gone through my previous posts before. If not please check here. You need to set up Maps Correctly for it to load. Lets start by adding… Read More »

How to handle configuration change in an activity using Fragments in android?

By | October 6, 2013

Here is a simple example in which we will save or retain the state of the progress using fragments. Note : We have handle a configuration by another way – by ignoring the change i.e using this property in the activity tag android:configChanges=”” By using this android ignores the configuration change and will never try to create a… Read More »

Faster Loading images in GridViews or ListViews in Android using Menory Caching, Complete implemenation with sample code.

By | September 1, 2013

Hi all This example shows you how to load large images in the gridview without any lag or without outofmemory error. This sample application uses the LruCache to hold the images. A cache that holds strong references to a limited number of values. Each time a value is accessed, it is moved to the head of a queue.… Read More »

What is a Memory Heap Size in android? and how can use Bitmap Efficiently?

By | August 25, 2013

Memory Heap Size Android is a full multitasking system so it’s possible to run multiple programs at the same time and obviously each one can’t use all of your device memory. For this reason there is a hard limit on your Android application’s heap size: if your application needs to allocate more memory and you have gone up… Read More »