Summary of three methods to enable threads in Android

In multi-threaded programming, we often use three classes: handler, thread and runnable. Have you figured out the relationship between them?

First of all, the minimum unit of CPU allocation for Android is a thread, and the handler is generally created in a thread, so the handler and thread are bound to each other and correspond to each other one by one.

Runnable is an interface, and thread is a subclass of runnable. So they are both a process.

As the name suggests, handlerthread is a thread that can handle message loops. It is a thread with looper that can handle message loops.

Rather than binding a handler to a thread, it is better to say that a handler corresponds to a looper one by one.

Handler is the bridge between activity and thread / runnable. The handler runs in the main UI thread, and it and child threads can pass data through the message object

1. First, the first enabling method is to implement a thread by inheriting the thread class and overriding the run method

start-up

new Thread(new MyRunnable()).start();

2. The second enabling method creates a runnable object

start-up

new Thread(new MyRunnable()).start();

Another enabling method

3. The third enabling method starts the thread through the handler

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