Viewpager以及侧滑切换

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于 2018-12-09 21:04:53 发布

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本文链接：https://blog.youkuaiyun.com/qq_43578439/article/details/84932102

本文详细介绍了一个Android应用的主页面布局设计与交互实现，包括ViewPager、RadioGroup、ListView和DrawerLayout组件的使用，以及它们之间的联动效果。通过实例代码展示了如何创建FragmentPagerAdapter来管理多个Fragment，实现页面滑动切换，并同步更新底部导航栏选中状态，同时利用ListView作为侧边菜单，点击菜单项可以关闭抽屉并跳转到相应页面。

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public class MainActivity extends AppCompatActivity {

    private ViewPager pager;

    private RadioGroup radiogroup;
    private ListView listview4;
    private DrawerLayout draww;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        pager = findViewById(R.id.pager);
        radiogroup = findViewById(R.id.radioGroup);
        listview4 = findViewById(R.id.listview4);
        draww = findViewById(R.id.draw);
        radiogroup.check(radiogroup.getChildAt(0).getId());
        final ArrayList<Fragment> list = new ArrayList<>();
        Frag1 frag1 = new Frag1();
        Frag2 frag2 = new Frag2();
        list.add(frag1);
        list.add(frag2);
        draww.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNDEFINED);
        pager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                return list.get(position);
            }

            @Override
            public int getCount() {
                return list.size();
            }

        });

        pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {

                switch (position){
                    case 0:
                        radiogroup.check(R.id.radio1);
                    break;
                    case 1:
                        radiogroup.check(R.id.radio2);
                        break;
                    case 2:
                        radiogroup.check(R.id.radio3);
                    break;
                }
//                radiogroup.check(radiogroup.getChildAt(position).getId());
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

        radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                switch (i){
                    case R.id.radio1:
                        pager.setCurrentItem(0);
                        break;
                    case R.id.radio2:
                        pager.setCurrentItem(1);
                        break;
                    case R.id.radio3:
                        pager.setCurrentItem(2);
                        break;

                }
            }
        });
        List<String> list_text = new ArrayList<>();
        list_text.add("首页");
        list_text.add("视频");
        list_text.add("我的");
        listview4.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list_text));
       listview4.setOnItemClickListener(new AdapterView.OnItemClickListener() {
           @Override
           public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
               pager.setCurrentItem(i);
               draww.closeDrawers();
               showDrawerLayout();
           }
       });
        draww.openDrawer(Gravity.LEFT);
    }
    private void showDrawerLayout() {
        if (!draww.isDrawerOpen(Gravity.LEFT)) {
            draww.openDrawer(Gravity.LEFT);
        } else {
            draww.closeDrawer(Gravity.LEFT);
        }
    }
}

//xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/draw"
    tools:context=".MainActivity">

    <android.support.v4.view.ViewPager
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/pager"
        />
    <RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:gravity="bottom"
        >

        <RadioButton
            android:id="@+id/radio1"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_weight="1"
            android:button="@null"

            android:text="消息"
            android:gravity="center"
            />
        <RadioButton
            android:id="@+id/radio2"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_weight="1"
            android:button="@null"

            android:text="消息"
            android:gravity="center"
            />
        <RadioButton
            android:id="@+id/radio3"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_weight="1"
            android:button="@null"

            android:text="消息"
            android:gravity="center"
            />
    </RadioGroup>
        <ListView
            android:layout_width="200dp"
            android:layout_height="match_parent"
            android:layout_gravity="left"
            android:id="@+id/listview4"
            android:choiceMode="singleChoice"
            android:background="@android:color/white" />
</android.support.v4.widget.DrawerLayout>