Rendering

A key aspect of your app that influences your users’ perception of quality is the smoothness with which it renders images and text to the screen. It is important to avoid jank and sluggish responsiveness when your app is drawing to the screen.
There are several ways to optimize your app’s rendering performance: reducing overdraw, optimizing view hierarchies, and taking advantage of the Profile GPU tool.

User Location

Android’s location permissions deal with the following categories of location access:

• Foreground location
• Background location

Memory leaks

Every app needs memory as a resource to do its work. To make sure each app in Android has enough memory, Android system needs to manage memory allocation efficiently. Android runtime triggers Garbage Collection (GC) when memory runs short. The purpose of GC is to reclaim memory by cleaning up objects that are no longer useful. It achieves it in three steps.

1. Traverses all object references in memory from GC roots and marks active objects which has references from GC roots.
2. All objects which are not marked (garbages) are wiped from memory.
3. Rearrange live objects

PdfRenderer API

This class enables rendering a PDF document. This class is not thread safe.
This api is added in API level 21

If you want to render a PDF, you create a renderer and for every page you want to render, you open the page, render it, and close the page. After you are done with rendering, you close the renderer. After the renderer is closed it should not be used anymore. Note that the pages are rendered one by one, i.e. you can have only a single page opened at any given time.

Publish Android library to server

First you have to convert your project into library for this please see the post: Create an Android library

There are so many ways to distribute or publish an android library, here are couple of them:

Memory Profiler

The Memory Profiler is a component in the Android Profiler that helps you identify memory leaks and memory churn that can lead to stutter, freezes, and even app crashes. It shows a real-time graph of your app’s memory use and lets you capture a heap dump, force garbage collections, and track memory allocations.
To open the Memory Profiler, follow these steps:

1. Click View > Tool Windows > Profiler (you can also click Profile in the toolbar).
2. Select the device and app process you want to profile from the Android Profiler toolbar. If you’ve connected a device over USB but don’t see it listed, ensure that you have enabled USB debugging.
3. Click anywhere in the MEMORY timeline to open the Memory Profiler.

Bulk SMS: Sender ID Analysis

You have been receiving SMS like LM-HATHWAY, TD-Google, AD-AADHAAR etc. These SMS’s sent by Banks, Service Providers, Social Networking sites, Companies and many other recognized organizations, institutes that have started prefixing something like LM, MM, BT, TA, AD, ID, AT, VK…etc.

PDF Picker

Below is the example for file chooser and convert it into byte array

Monkey Test

The Monkey is a program that runs on your emulator or device and generates pseudo-random streams of user events such as clicks, touches, or gestures, as well as a number of system-level events. You can use the Monkey to stress-test applications that you are developing, in a random yet repeatable manner.

Android Intents with Chrome

A little known feature in Android lets you launch apps directly from a web page via an Android Intent.