不使用ViewPager实现Fragment切换

见到一种不依赖viewpager实现多个fragment来回切换的实现，潜意识里认为能减少不少出问题的因素。在这里做下记录。

布局文件：

<!--activity_sleep_data.xml-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tl="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:fitsSystemWindows="true"
android:orientation="vertical"
tools:context="com.meddo.zzh.bed.SleepDataActivity">

<include layout="@layout/title_bar_bg_white" />

<com.flyco.tablayout.SegmentTabLayout
android:id="@+id/segment_tab_layout"
android:layout_width="match_parent"
android:layout_height="35dp"
android:layout_gravity="center_horizontal"
tl:tl_indicator_color="@color/colorPrimary"
tl:tl_indicator_corner_radius="0dp"
tl:tl_tab_padding="20dp" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal">

<fragment
android:id="@+id/fragment_heart"
class="com.meddo.zzh.bed.HeartFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"></fragment>

<fragment
android:id="@+id/fragment_breath"
class="com.meddo.zzh.bed.BreathFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"></fragment>

<fragment
android:id="@+id/fragment_off_bed"
class="com.meddo.zzh.bed.OffBedFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"></fragment>

<fragment
android:id="@+id/fragment_turn_over"
class="com.meddo.zzh.bed.TurnOverFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"></fragment>
</LinearLayout>

</LinearLayout>

代码：

public class SleepDataActivity extends BaseActivity {
private SegmentTabLayout mSegmentTabLayout;
private FragmentManager mFragmentManager;
private Fragment[] fragments;
private int[] mFragmentIds = new int[]{R.id.fragment_heart, R.id.fragment_breath,
R.id.fragment_off_bed, R.id.fragment_turn_over};

@Override
public void initView() {
setContentView(R.layout.activity_sleep_data);
mSegmentTabLayout = (SegmentTabLayout) findViewById(R.id.segment_tab_layout);
mSegmentTabLayout.setTabData(new String[]{"心率", "呼吸", "离床", "体动"});
mFragmentManager = getSupportFragmentManager();
fragments = new Fragment[]{mFragmentManager.findFragmentById(mFragmentIds[0]),
mFragmentManager.findFragmentById(mFragmentIds[1]),
mFragmentManager.findFragmentById(mFragmentIds[2]),
mFragmentManager.findFragmentById(mFragmentIds[3]),};
mSegmentTabLayout.setOnTabSelectListener(new OnTabSelectListener() {
@Override
public void onTabSelect(int position) {
for (int i = 0; i < fragments.length; i++) {
mFragmentManager.beginTransaction().hide(fragments[i]).commit();
}
FragmentTransaction transaction = mFragmentManager.beginTransaction();
transaction.show(fragments[position]);
transaction.commit();
}

@Override
public void onTabReselect(int position) {
}
});
}
}

直接从项目中复制的代码。(SegmentTabLayout是tabar控件，点击切换fragment。详见FlycoTabLayout)