在后台线程的Andr​​oid addView [英] android addView in background thread

问题描述

我需要添加大量的意见在一个循环中，而该片段这样做，应用程序也将有一个抽屉式导航和操作栏，用户可以做的事情。

I need to add lots of views in a loop, while this fragment does that, the app will also have a navigation drawer and action bar where the user can do things.

所以我想这个过程不是一）通过阻止用户拖慢应用程序，B）preferably添加的意见在后台线程。

so I would like this process to not a) slow down the app by blocking the user, b) preferably add the views in a background thread.

的困境是，我认为Android不喜欢在一个非UI线程无以复加的观点，那么，有没有最好的做法呢？我计划有一个进度条视图对象在片段的视图中，同时正在与addView和相关的计算产生的意见其余

The dilemma is that I think android doesn't like views to be added in a non-UI thread, so is there a best practice for this? I plan to have a progress bar view object visible in the fragment's view while the rest of the views are being generated with the addView and associated computations

推荐答案

而不是添加视图在后台线程则可以包裹由发布工作的若干的Runnable 的UI线程。在code以下是该技术的一个高度简化的版本，但它类似于如何在Android的应用程序启动已完成：

Instead of adding view on a background thread you can parcel out the work by posting several Runnables on the UI thread. The code below is a highly simplified version of that technique but it's similar to how it was done in Android's Launcher app:

private void createAndAddViews(int count} {
    for (int i = 0; i < count; i++) {
         // create new views and add them
    }
}

Runnable r = new Runnable() {
    public void run() {
        createAndAddViews(4); // add 4 views
        if (mMoreViewsToAdd) mTopLevelView.post(this);
    }
};

mTopLevelView.post(r);

这篇关于在后台线程的Andr​​oid addView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！