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Notifications

• depend on: implementation "com.android.support:support-compat:27.1.1"

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Google Places API - via SDK on Android

refrences

*https://codelabs.developers.google.com/codelabs/fire-place/index.html?index=..%2F..%2Findex#8

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AsyncTaskLoader in Android

an AsyncTaskLoader based on a Loader

When to use this threading primitive ?

• They encapsulate the process of data loading.
• They survive configuration changes, preventing unnecessarily reloading data.

HowTo access the data once loaded

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ThreadPoolExecutor

ThreadPoolExecutor executes parallelized tasks across multiple different threads of a thread pool. To execute work concurrently and retain control over how the work is executed, this is the tool for the job.

Using ThreadPoolExecutor

1. constructing a new instance
2. confgure the many arguments of the thread pool
3. if initializing ThreadPoolExecutor in a service, ensure to create it within onStartCommand() not onCreate()

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HandlerThread in Android

The HandlerThread is a convenience class that initiates a Looper within a Thread to process Runnable or Message objects. The Handler is used to handle the insertion of the Runnable or Message objects into the looper's queue: The Handler class supports several other ways to schedule a Message to be processed at a future time:

Queueing tasks

• sendMessage - Pushes a message onto the end of the message queue.
• sendMessageDelayed - Pushes a message onto the end of the message queue.

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Threads - in Android

UI and Worker thread access

Android does not allow to access the UI from a worker tread.

This shows how to access the UI thread from a Worker thread. The following are some methods to access the UI.thread:

• Activity.runOnUiThread(Runnable)

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AsyncTask

When to use this threading primitive?

1. for short (say up to 3 seconds) background tasks that would otherwise block the UI thread
2. thread abstraction
3. easy implimentation
4. easy ui communication

Caveats:

1. not lifecycle aware

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Handler - Stub

Use a Handler to run code on a given thread after a delay or repeat tasks periodically on a thread.

1. constructing a Handler and then
2. "posting" Runnable code to the event message queue on the thread to be processed

Handler can communicate with UI-thread

handler.post(); handler.postAtFrontOfQueue();

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Advanced Fragment Example - Master/Detail with a Strategy Factory

Implementing Master/Detail with:

• adaptive master_detail with a handset breakpoint
• a controller factory.
• Interface based contract between fragment/activity/controller whie keeping them decoupled

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1. • main activity with implements the intererface for

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RecyclerView - Swipe to dismiss/accept