安卓的onCreate onResume [英] Android onCreate onResume

问题描述

我有一个问题。 当我开始了第一次我的Andr​​oid应用程序，在主要活动均的onCreate 和 onResume 被调用。但我只想叫的onCreate。

I have a problem. When I start for the first time my android application, in the main activity both the onCreate and the onResume are called. but I want to be called only the onCreate.

我该怎么办？

推荐答案

据该SDK文档，你看到的是预期的行为是什么。看一看在文档的活动流程图 - 。活动生命周期

According to the SDK docs what you are seeing is the intended behavior. Have a look at the flowchart in the docs for Activity - Activity Lifecycle.

编程可以通过保持一个实例成员克服这种跟踪是否onResume已被调用之前 - 在第一次被调用时，设置变量并返回例如

Programmatically you can overcome this by keeping an instance member to track whether onResume has been called before - the first time it is called, set the variable and return e.g.

private boolean resumeHasRun = false;

@Override
protected void onResume() {
    super.onResume();
    if (!resumeHasRun) {
        resumeHasRun = true;
        return;
    }
    // Normal case behavior follows
}

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