Android启动优化之延时加载的步骤详解

/**
* Callback interface for discovering when a thread is going to block
* waiting for more messages.
*/
public static interface IdleHandler {
 /**
 * Called when the message queue has run out of messages and will now
 * wait for more. Return true to keep your idle handler active, false
 * to have it removed. This may be called if there are still messages
 * pending in the queue, but they are all scheduled to be dispatched
 * after the current time.
 */
 boolean queueIdle();

}

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

 // ...

 // 拿到主线程的MessageQueue
 Looper.myQueue().addIdleHandler(new MessageQueue.IdleHandler() {

 @Override
 public boolean queueIdle() {
  // 在这里去处理你想延时加载的东西
  delayLoad();

  // 最后返回false，后续不用再监听了。
  return false;
 }
 });
}