添加Fragment

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原创最新推荐文章于 2026-05-01 09:11:28 发布 288 阅读 AI 写同款· GEO 优化 ›

Android学习|Fragment__01静态、动态添加Fragment 什么是Fragment 1:具备生命周期 Fragment有生命周期，那么在一个activity可以使用多个Fragment，或者一个Fragment在多个activity 中重复使用，来完成一些效果 2、必须委托在activity中才能运行则一个activity暂停，其中包含的所有的Framgment都会暂停动态添加Fragment ... 阅读详情

private BaseFragment lastFragment;
private FragmentManager manager;


public void addFragment(Class<? extends BaseFragment> fragment, int id) {
    manager = getSupportFragmentManager();
    FragmentTransaction transaction = manager.beginTransaction();
    String simpleName = fragment.getSimpleName();
    BaseFragment fragmentByTag = (BaseFragment) manager.findFragmentByTag(simpleName);
    if (fragmentByTag == null) {
        try {
            fragmentByTag = fragment.newInstance();
            transaction.add(id, fragmentByTag, simpleName);
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
    if (lastFragment != null) {
        transaction.hide(lastFragment);
    }
    transaction.show(fragmentByTag);
    lastFragment = fragmentByTag;
    transaction.commit();
}

<RadioButton
android:layout_marginBottom="@dimen/dp_2"
android:background="@color/widget_color"
android:checked="true"
android:id="@+id/mHome"
android:layout_width="0dp"
android:layout_weight="1"
android:button="@null"
android:layout_height="match_parent"
android:drawableTop="@drawable/selecthome"
android:text="首页"
android:textSize="@dimen/dp_10"
android:layout_marginTop="@dimen/dp_10"
android:gravity="center"
/>