菜单布局记录篇

效果如图，很常见的一种布局方式，只是没有采用radiobutton，方法都很多，很多人都自定义写在一个view里面，不过代码量偏大，所以还是xml写吧

这样写下来感觉代码量还是挺少的，而且很好扩展，然后在点击的时候加了个回弹动画，顿时体验好多了

public class MainActivity extends BaseActivity implements IMainView ,ViewPager.OnPageChangeListener{

    @BindView(R.id.viewPager)
    ViewPager viewPager;

    private MainAdapter adapter;
    private SparseArray<CheckBox> menus = new SparseArray<>();

    public static void start(Context context) {
        start(context, null);
    }

    public static void start(Context context, Intent extras) {
        Intent intent = new Intent();
        intent.setClass(context, MainActivity.class);
        if (extras != null) {
            intent.putExtras(extras);
        }
        context.startActivity(intent);
    }

    @Override
    public int layoutID() {
        return R.layout.activity_main;
    }

    @Override
    public void init() {
        adapter = new MainAdapter(getSupportFragmentManager());
        viewPager.setAdapter(adapter);
        viewPager.setOffscreenPageLimit(FragmentHelper.getCount());
        viewPager.addOnPageChangeListener(this);

        addTab(findViewById(R.id.home),0);
        addTab(findViewById(R.id.contact),1);
        addTab(findViewById(R.id.community),2);
        addTab(findViewById(R.id.me),3);
        select(0);
    }

    @Override
    public void success() {

    }

    @Override
    public void error() {

    }

    public void click(View view){

        int position = 0;
        switch (view.getId()){
            case R.id.home:
                position = 0;
                break;
            case R.id.contact:
                position = 1;
                break;
            case R.id.community:
                position = 2;
                break;
            case R.id.me:
                position = 3;
                break;
        }
        select(position);
    }
    /**添加首页按钮缓存*/
    private void addTab(View view,int position){
        ViewGroup group = cover(view);
        CheckBox checkBox = cover(group.getChildAt(0));
        checkBox.setChecked(false);
        menus.put(position,checkBox);
    }
    /**选择菜单*/
    private void select(int position){
        if (menus.get(position).isChecked())
            return;//防止执行多次
        Log.e("tag",position+"");
        for (int i = 0;i < menus.size();i++) {
            CheckBox box = menus.get(i);
            if (box == null)
                continue;
            if (i == position) {
                box.setChecked(true);
            }else
                box.setChecked(false);
        }
        viewPager.setCurrentItem(position, false);
    }


    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

    }

    @Override
    public void onPageSelected(int position) {
        select(position);
    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipChildren="false"
    android:clipToPadding="false"
    android:orientation="vertical">

    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:clipChildren="false"
        android:clipToPadding="false"
        android:weightSum="4">
        <LinearLayout android:id="@+id/home"
            android:layout_width="@dimen/dp_0"
            android:layout_height="match_parent"
            android:background="@drawable/shape_line"
            android:padding="@dimen/dp_3"
            android:clipChildren="false"
            android:clipToPadding="false"
            android:onClick="click"
            android:orientation="vertical"
            android:layout_weight="1">

            <com.fragmentapp.home.view.BounceView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/selected_main_home"
                android:clickable="false"
                android:checked="true"
                android:button="@null"
                android:layout_gravity="center"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#696868"
                android:textSize="@dimen/sp_11sp"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="@dimen/dp_2"
                android:text="首页"/>

        </LinearLayout>

        <LinearLayout android:id="@+id/contact"
            android:layout_width="@dimen/dp_0"
            android:layout_height="match_parent"
            android:background="@drawable/shape_line"
            android:padding="@dimen/dp_3"
            android:clipChildren="false"
            android:clipToPadding="false"
            android:onClick="click"
            android:orientation="vertical"
            android:layout_weight="1">

            <com.fragmentapp.home.view.BounceView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/selected_main_contact"
                android:clickable="false"
                android:checked="false"
                android:button="@null"
                android:layout_gravity="center"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#696868"
                android:textSize="@dimen/sp_11sp"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="@dimen/dp_2"
                android:text="通讯录"/>

        </LinearLayout>

        <LinearLayout android:id="@+id/community"
            android:layout_width="@dimen/dp_0"
            android:layout_height="match_parent"
            android:background="@drawable/shape_line"
            android:padding="@dimen/dp_3"
            android:clipChildren="false"
            android:clipToPadding="false"
            android:onClick="click"
            android:orientation="vertical"
            android:layout_weight="1">

            <com.fragmentapp.home.view.BounceView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/selected_main_community"
                android:clickable="false"
                android:checked="false"
                android:button="@null"
                android:layout_gravity="center"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#696868"
                android:textSize="@dimen/sp_11sp"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="@dimen/dp_2"
                android:text="消息"/>

        </LinearLayout>

        <LinearLayout android:id="@+id/me"
            android:layout_width="@dimen/dp_0"
            android:layout_height="match_parent"
            android:background="@drawable/shape_line"
            android:padding="@dimen/dp_3"
            android:clipChildren="false"
            android:clipToPadding="false"
            android:onClick="click"
            android:orientation="vertical"
            android:layout_weight="1">

            <com.fragmentapp.home.view.BounceView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/selected_main_me"
                android:clickable="false"
                android:checked="false"
                android:button="@null"
                android:layout_gravity="center"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#696868"
                android:textSize="@dimen/sp_11sp"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="@dimen/dp_2"
                android:text="我的"/>

        </LinearLayout>

    </LinearLayout>

</LinearLayout>

public class HomeFragment extends LazyFragment {

    @BindView(R.id.tv_tag)
    TextView tv_tag;

    @Override
    protected int getLayoutId() {
        return R.layout.fragment_home;
    }

    @Override
    protected void init() {
        String tag = getArguments().get("tag").toString();
        if (tag != null)
            tv_tag.setText(tag);
    }

    @OnClick({R.id.search})
    public void search(View view){
        FragmentFactory.start(getActivity(),FragmentFactory.SEARCH);
    }

}

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

    <TextView android:id="@+id/search"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@mipmap/icon_search"
        android:text="搜索"
        android:textColor="#000000"
        android:layout_gravity="center"
        android:textSize="@dimen/sp_17sp"/>

    <TextView android:id="@+id/tv_tag"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="@dimen/sp_17sp"
        android:textColor="@color/colorAccent"
        android:layout_gravity="center"
        android:text="text"/>

</LinearLayout>

public class BounceView extends android.support.v7.widget.AppCompatCheckBox{

    public BounceView(Context context) {
        super(context);
        init();
    }

    public BounceView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public BounceView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init(){
        setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                if (b)
                    startAnimation();
            }
        });
    }

    public void startAnimation() {
        ValueAnimator anim = ValueAnimator.ofInt(-10,0,6,0);

        anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                int curValue = (int) animation.getAnimatedValue();
                layout(
                        getLeft(),
                        curValue+((ViewGroup)getParent()).getPaddingTop(),
                        getRight(),
                        curValue+getHeight()+((ViewGroup)getParent()).getPaddingBottom()
                );
            }
        });
        anim.setInterpolator(new BounceInterpolator());
        anim.setDuration(500);
        anim.start();
    }

}

public class MainAdapter extends FragmentPagerAdapter {

    public MainAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        return FragmentHelper.getFragment(position);
    }

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

public class FragmentHelper {

    private static SparseArray<SoftReference<LazyFragment>> arr = new SparseArray<SoftReference<LazyFragment>>();

    public static LazyFragment getFragment(int pos) {
        LazyFragment fragment = null;
        if (null != arr.get(pos))
            fragment = arr.get(pos).get();
        if (null == fragment) {
            switch (pos) {
                case 0:
                    fragment = new HomeFragment();
                    break;
                case 1:
                    fragment = new HomeFragment();
                    break;
                case 2:
                    fragment = new HomeFragment();
                    break;
                case 3:
                    fragment = new HomeFragment();
                    break;

                default:
                    break;
            }
            Bundle bundle = new Bundle();
            bundle.putString("tag",pos+"");
            fragment.setArguments(bundle);
            arr.put(pos, new SoftReference<LazyFragment>(fragment));
        }
        return fragment;
    }

    public static int getCount(){
        return 4;
    }

}

fragment采用懒加载方式，这个就不说了

public abstract class LazyFragment extends BaseFragment {

    protected boolean isLoad;//是否加载完

    /**
     * 在这里实现Fragment数据的缓加载.
     */
    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        if(getUserVisibleHint()) {
            isVisible = true;
            onVisible();
        } else {
            isVisible = false;
        }
    }

    protected void onVisible(){
        if(!isPrepared || !isVisible || !isLoad) {
            return;
        }
        init();
        Log.e("tag","init success");
    }

}

GitHub下载地址：https://github.com/1024477951/FragmentApp