Android之Fragment

最新推荐文章于 2021-11-24 16:09:27 发布

原创最新推荐文章于 2021-11-24 16:09:27 发布 · 648 阅读

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本文介绍了一种使用Android中的RadioGroup实现底部导航栏的方法。通过四个RadioButton分别对应不同的功能选项，并结合Fragment进行页面切换。该方案适用于需要快速实现底部导航的应用场景。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/main_radioButton_tab1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:button="@null"
            android:checked="true"
            android:drawableTop="@drawable/selector1"
            android:gravity="center"
            android:tag="0"
            android:text="漫画"
            android:textColor="@drawable/selector_clor2"
            android:textSize="15sp" />

        <RadioButton
            android:id="@+id/main_radioButton_tab2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:button="@null"
            android:drawableTop="@drawable/selector2"
            android:gravity="center"
            android:tag="1"
            android:text="发现"
            android:textColor="@drawable/selector_clor2"
            android:textSize="15sp" />

        <RadioButton
            android:id="@+id/main_radioButton_tab3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:button="@null"
            android:drawableTop="@drawable/selector3"
            android:gravity="center"
            android:tag="2"
            android:text="V社区"
            android:textColor="@drawable/selector_clor2"
            android:textSize="15sp" />

        <RadioButton
            android:id="@+id/main_radioButton_tab4"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:button="@null"
            android:drawableTop="@drawable/selector4"
            android:gravity="center"
            android:tag="3"
            android:text="我的"
            android:textColor="@drawable/selector_clor2"
            android:textSize="15sp" />
    </RadioGroup>

    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/radioGroup"></FrameLayout>

</RelativeLayout>












public class SecondActivity extends FragmentActivity {    private FragmentManager fm;    private RadioGroup rg;    private List<Fragment> list;    private Fragment1 fragment1;    private Fragment2 fragment2;    private Fragment3 fragment3;    private Fragment4 fragment4;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.second_main);        rg = (RadioGroup) findViewById(R.id.radioGroup);        list = new ArrayList<Fragment>();        fm = getSupportFragmentManager();        fm = getSupportFragmentManager();        fragment1 = new Fragment1();        fragment2 = new Fragment2();        fragment3 = new Fragment3();        fragment4 = new Fragment4();        list.add(fragment1);        list.add(fragment2);        list.add(fragment3);        list.add(fragment4);        FragmentTransaction transaction = fm.beginTransaction();        transaction.add(R.id.frameLayout, list.get(0));        transaction.add(R.id.frameLayout, list.get(1));        transaction.add(R.id.frameLayout, list.get(2));        transaction.add(R.id.frameLayout, list.get(3));        transaction.show(list.get(0)).hide(list.get(1)).hide(list.get(2)).hide(list.get(3));        transaction.commit();        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(RadioGroup group, int checkedId) {                RadioButton rb = (RadioButton) group.findViewById(checkedId);                int  tag = Integer.parseInt(rb.getTag().toString());                FragmentTransaction transaction2 = fm.beginTransaction();                for (int i = 0; i < list.size(); i++) {                    if (tag == i) {                        transaction2.show(list.get(i));                    }else {                        transaction2.hide(list.get(i));                    }                }                transaction2.commit();            }        });    }}