2020-07-25 Android中Handler弱引用工具类

import android.os.Handler;
import android.os.Message;

import java.lang.ref.WeakReference;

/**

• Created by ibalde.Wang on 2018/10/25 12:10

• Handler弱引用工具类
  */
  public class HandlerUtils {

  private HandlerUtils() {
  throw new UnsupportedOperationException("you can not instantiate me...");
  }

  public static class HandlerHolder extends Handler {
  WeakReference<OnReceiveMessageListener> mListenerWeakReference;

   /**
    * 使用必读：推荐在Activity或者Activity内部持有类中实现该接口，不要使用匿名类，可能会被GC
    *
    * @param listener 收到消息回调接口
    */
   public HandlerHolder(OnReceiveMessageListener listener) {
       mListenerWeakReference = new WeakReference<>(listener);
   }
  
   @Override
   public void handleMessage(Message msg) {
       if (mListenerWeakReference != null && mListenerWeakReference.get() != null) {
           mListenerWeakReference.get().handlerMessage(msg);
       }
   }
  

  }

  /**

  • 收到消息回调接口
    */
    public interface OnReceiveMessageListener {
    void handlerMessage(Message msg);
    }

}
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原文链接：https://blog.csdn.net/iblade/java/article/details/83419782