动态加载Fragment

最新推荐文章于 2018-07-26 10:41:00 发布

弥夏i

最新推荐文章于 2018-07-26 10:41:00 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/shana_mx/article/details/52122821

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本文介绍了如何在Android应用中实现动态加载Fragment，通过设置两个LinearLayout并在Activity中初始化，达到在同一页面展示多个Fragment的效果。

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实现在同一个页面上动态加载两个Fragment

首先是布局文件，由两个LinearLayOut 构成，具体的 Fragement 布局就不贴了

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android=""
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <LinearLayout
        android:id="@+id/add_fm_left"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_weight="3">

    </LinearLayout>

    <View
        android:layout_width="1dp"
        android:layout_height="match_parent"
        android:layout_alignParentBottom="true"
        android:background="#cfcfcf"  />

    <LinearLayout
        android:id="@+id/add_fm_right"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_weight="7">

    </LinearLayout>

</LinearLayout>

新建一个类 FragementRigh 继承自 Fragment （v4包下的）

public class FragmentHomeWorkRight extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_teacher_pad_notonlinehw_right,container,false);
        return view;
    }

    public static FragmentHomeWorkRight newInstance()
    {
        FragmentHomeWorkRight fragmentRight = new FragmentHomeWorkRight();
        return fragmentRight;
    }
}

新建Activity类加载布局并对 Fragment 初始化

public class AddHwActivity extends FragmentActivity {

    private FragmentHomeWorkLeft fm_left;
    private FragmentHomeWorkRight fm_right;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_hw);
        initView();
    }

    private void initView() {
        FragmentManager fm = getSupportFragmentManager();
        fm_left = (FragmentHomeWorkLeft) fm.findFragmentById(R.id.add_fm_left);
        fm_right = (FragmentHomeWorkRight) fm.findFragmentById(R.id.add_fm_right);
        if (fm_left == null) {
            fm_left = fm_left.newInstance();
            fm.beginTransaction().add(R.id.add_fm_left, fm_left).commit();
        }
        if (fm_right == null) {
            fm_right = fm_right.newInstance();
            fm.beginTransaction().add(R.id.add_fm_right, fm_right).commit();
        }
    }
}