主页面RadioButton切换Fragment模板

XML布局

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

    <FrameLayout
        android:id="@+id/main_fragment_container"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

    </FrameLayout>

    <RadioGroup
        android:id="@+id/main_tab_bar"
        android:layout_width="match_parent"
        android:layout_height="47dp"
        android:layout_gravity="bottom"
        android:gravity="center"
        android:background="#E6020212"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/main_homepage"
            android:layout_width="0dp"
            android:layout_height="45dp"
            android:layout_weight="1"
            android:layout_marginLeft="28dp"
            android:background="@drawable/main_select_imageview_home"
            android:button="@null"
            android:checked="true"
            android:gravity="center" />

        <RadioButton
            android:id="@+id/main_study"
            android:layout_width="0dp"
            android:layout_height="45dp"
            android:layout_weight="1"
            android:layout_marginLeft="10dp"
            android:background="@drawable/main_select_imageview_study"
            android:button="@null"
            android:gravity="center" />

        <RadioButton
            android:id="@+id/main_message"
            android:layout_width="0dp"
            android:layout_height="45dp"
            android:layout_weight="1"
            android:layout_marginLeft="10dp"
            android:background="@drawable/main_select_imageview_message"
            android:button="@null"
            android:gravity="center" />

        <RadioButton
            android:id="@+id/main_mine"
            android:layout_width="0dp"
            android:layout_height="45dp"
            android:layout_weight="1"
            android:layout_marginLeft="10dp"
            android:background="@drawable/main_select_imageview_mime"
            android:button="@null"
            android:gravity="center" />

    </RadioGroup>

</LinearLayout>

button背景选择器

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
   <item android:drawable="@mipmap/keche_icon_2x1" android:state_checked="true"/>
    <item android:drawable="@mipmap/keche_icon_2x"/>
</selector>

MainActivity

public class MainActivity extends FragmentActivity implements RadioGroup.OnCheckedChangeListener {

    private Fragment[] fragments;
    private RadioGroup radiogroup;
    private int index;
    private int showWhich;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        //设置全屏
//        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
//                WindowManager.LayoutParams.FLAG_FULLSCREEN);     
//        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
//            setTranslucentStatus(true);
//        }
//        SystemBarTintManager tintManager = new SystemBarTintManager(this);
//        // 激活状态栏设置
//        tintManager.setStatusBarTintEnabled(true);
//        tintManager.setStatusBarTintResource(R.color.toumingstatusbar_bg);
        
       
        FragmentManager manager = getSupportFragmentManager();
        fragments = new Fragment[4];
        FragmentTransaction tx = manager.beginTransaction();
        if (savedInstanceState != null) {
            //代表Activity重新创建，内部的Fragmetn会自动添加
            int len = fragments.length;
            for (int i = 0; i < len; i++) {
                fragments[i] = manager.findFragmentByTag("f" + i);
                tx.hide(fragments[i]);
            }
        } else {
            fragments[0] = new NewHomeFragment();
            fragments[1] = new StudyFragment();
            fragments[2] = new InformationFragment();
            fragments[3] = new MineFragment();

            int length = fragments.length;

            for (int i = 0; i < length; i++) {
                //添加Fragment,并且制定tag,利用tag在activity 重新创建的时候重新查找
                tx.add(R.id.main_fragment_container, fragments[i], "f" + i);

                tx.hide(fragments[i]);
            }
        }
        tx.show(fragments[showWhich]);
        tx.commit();

        radiogroup = (RadioGroup) findViewById(R.id.main_tab_bar);
        radiogroup.setOnCheckedChangeListener(this);
    }

    @TargetApi(19)
    private void setTranslucentStatus(boolean on) {
        Window win = getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        final int bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
        if (on) {
            winParams.flags |= bits;
        } else {
            winParams.flags &= ~bits;
        }
        win.setAttributes(winParams);
    }

    
@Override
//    protected void onNewIntent(Intent intent) {
//        if (intent != null) {
//            String flag = intent.getStringExtra("flag");
//            if (flag != null && !flag.equals("")) {
//                showWhich = Integer.parseInt(flag);
//                FragmentManager fragmentManager = getSupportFragmentManager();
//
//                FragmentTransaction tx = fragmentManager.beginTransaction();
//                for (int i = 0; i < fragments.length; i++) {
//                    if (showWhich == i) {
//                        tx.show(fragments[i]);
//                        ((RadioButton) radiogroup.getChildAt(showWhich)).setChecked(true);
//                    } else {
//                        tx.hide(fragments[i]);
//                    }
//                }
//                tx.commitAllowingStateLoss();
//            }
//        }
//        super.onNewIntent(intent);
//    }
    @Override    public void onCheckedChanged(RadioGroup group, int checkedId) {        index = 0;        switch (checkedId) {            case R.id.main_homepage:                index = 0;                break;            case R.id.main_study:                index = 1;                break;            case R.id.main_message:                index = 2;                break;            case R.id.main_mine:                index = 3;                break;        }        int length = fragments.length;        FragmentManager fragmentManager = getSupportFragmentManager();        FragmentTransaction tx = fragmentManager.beginTransaction();        for (int i = 0; i < length; i++) {            if (index == i) {                if (index == 1) {                    if (App.jsessionid == null) {//未登录跳转登录页面                        Intent intent = new Intent(MainActivity.this, LogActivity.class);                        startActivity(intent);                        ((RadioButton) radiogroup.getChildAt(0)).setChecked(true);                        tx.show(fragments[0]);                    } else {                        tx.show(fragments[i]);                    }                } else {                    tx.show(fragments[i]);                }            } else {                tx.hide(fragments[i]);            }        }        tx.commitAllowingStateLoss();    }   
 @Override
//    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//        FragmentManager fragmentManager = getSupportFragmentManager();
//        super.onActivityResult(requestCode, resultCode, data);
//        Fragment f = fragmentManager.findFragmentByTag("f3");
//        /*在碎片中调用重写的onActivityResult方法*/
//        f.onActivityResult(requestCode, resultCode, data);
//    }

@Override
//    public boolean onKeyDown(int keyCode, KeyEvent event) {
//        boolean b = false;
//        FragmentManager fragmentManager = getSupportFragmentManager();
//        if (index == 0) {
//            NewHomeFragment f = (NewHomeFragment) fragmentManager.findFragmentByTag("f" + 0);
//            b = f.onKeyDown(keyCode, event);
//        } else if (index == 1) {
//            StudyFragment f = (StudyFragment) fragmentManager.findFragmentByTag("f" + 1);
//            b = f.onKeyDown(keyCode, event);
//        } else if (index == 2) {
//            InformationFragment f = (InformationFragment) fragmentManager.findFragmentByTag("f" + 2);
//            b = f.onKeyDown(keyCode, event);
//        } else {
//            MineFragment f = (MineFragment) fragmentManager.findFragmentByTag("f" + 3);
//            b = f.onKeyDown(keyCode, event);
//        }
//        /*在碎片中调用重写的onActivityResult方法*/
//
//        if (b) {
//            return b;
//        } else {
//            return super.onKeyDown(keyCode, event);
//        }
//    }
}