安卓：限制片段加载与viewPager [英] Android: limit fragments loading with a viewPager

问题描述

我有3个片段是由FragmentPagerAdapter管理，设置为viewPager。

I have 3 fragments that are managed by an FragmentPagerAdapter, set to a viewPager.

我要加载片段一个接一个，但执行FragmentActivity的onCreate方法时，在2分片执行（onCreateView法）。

I want to load fragments one by one, but when the onCreate method of FragmentActivity is executed, the 2 first fragments are executed (onCreateView method).

我曾试图限制片段加载与setOffscreenPageLimit方法，但没有任何变化。

I have tried to limit fragments loading with the setOffscreenPageLimit method but nothing change.

mPagerAdapter =  new MyPagerAdapter(super.getSupportFragmentManager(), fragments);
pager = (ViewPager) super.findViewById(R.id.tabviewpager);
pager.setOffscreenPageLimit(0);
pager.setAdapter(this.mPagerAdapter);

感谢您的帮助。

推荐答案

最低为 OffscreenPageLimit 设置为 1 在 ViewPager <一个href="http://grep$c$c.com/file/repository.grep$c$c.com/java/ext/com.google.android/android/4.0.1_r1/android/support/v4/view/ViewPager.java#ViewPager.setOffscreenPageLimit%28int%29">source code ：

private static final int DEFAULT_OFFSCREEN_PAGES = 1;
....
public void setOffscreenPageLimit(int limit) {
    if (limit < DEFAULT_OFFSCREEN_PAGES) {
        Log.w(TAG, "Requested offscreen page limit " + limit + " too small; defaulting to " +
                DEFAULT_OFFSCREEN_PAGES);
        limit = DEFAULT_OFFSCREEN_PAGES;
    }
    if (limit != mOffscreenPageLimit) {
        mOffscreenPageLimit = limit;
        populate();
    }
}

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