Handler内存泄露解决方案

• 创建静态内部类的Handler

• 弱引用activity

• 清除消息

弱引用activity

基类BaseStaticWeakHandler.java

 package com.yunque361.core;

import android.app.Activity;
import android.os.Handler;
import android.os.Message;

import com.yunque361.core.bean.RestBase;

import java.lang.ref.WeakReference;

/**
 * Created by mingzhangyong on 17-6-12.
 *
 *说明：此类用于创建弱引用的handler基类，创建静态内部类继承BaseStaticWeakHandler重写dealMessage（无异常）和restError（异常）
 *
 *子类中将dealMessage的activity参数强转为子类activity，再调用子类所在activity的方法
 */

public abstract class BaseStaticWeakHandler extends Handler{

    protected final WeakReference<Activity> mActivity;
    public BaseStaticWeakHandler(Activity activity) {
        mActivity = new WeakReference<>(activity);
    }

    @Override
    public void handleMessage(Message msg) {
        Activity activity = mActivity.get();
        if(null == activity) {
            return;
        }
        Object obj = msg.obj;
        if (obj instanceof RestBase) {
            restError(activity,msg);
            return;
        }
        dealMessage(activity,msg);
    }

    protected abstract void dealMessage(Activity activity,Message msg);
    protected abstract void restError(Activity activity,Message msg);
}

创建静态内部类的Handler

使用示例：

private static class HandlerCancelCollect extends BaseStaticWeakHandler{

    public HandlerCancelCollect(Activity activity) {
        super(activity);
    }

    @Override
    protected void dealMessage(Activity activity, Message msg) {
        ((WebSkuActivity)activity).dealCancelCollectMessage(msg);
    }

    @Override
    protected void restError(Activity activity, Message msg) {
        ((WebSkuActivity)activity).dealCancelCollectMessageFail(msg);
    }
}
private void dealCancelCollectMessage(Message msg){
    // TODO
}
private void dealCancelCollectMessageFail(Message msg){
    // TODO
}
private Handler handlerCancelCollect = new HandlerCancelCollect(this);

清除消息

@Override
    protected void onDestroy() {
        if(null != handlerCancelCollect){
            handlerCancelCollect.removeCallbacksAndMessages(null);
            handlerCancelCollect = null;
        }
        super.onDestroy();
    }