android 使用Fragment 代替ActivityGroup

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1.创建activity_main.xml

<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"    tools:context=".MainActivity" >    <FrameLayout        android:id="@+id/content"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1" >    </FrameLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="60dp">        <RelativeLayout            android:id="@+id/station_beacons_layout"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1" >            <LinearLayout                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:layout_centerVertical="true"                android:orientation="vertical" >                <TextView                    android:id="@+id/station_beacons"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:layout_gravity="center_horizontal"                    android:text="设置"                    android:textColor="#82858b" />            </LinearLayout>        </RelativeLayout>        <RelativeLayout            android:id="@+id/scan_beancons_layout"            android:layout_width="0dp"            android:layout_height="match_parent"            android:layout_weight="1" >            <LinearLayout                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:layout_centerVertical="true"                android:orientation="vertical" >                <TextView                    android:id="@+id/scan_beancons"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:layout_gravity="center_horizontal"                    android:text="联系人"                    android:textColor="#82858b" />            </LinearLayout>        </RelativeLayout>    </LinearLayout></LinearLayout>

2.在Class MainActivityextendsFragmentActivityimplementsView.OnClickListener onCreate 方法中添加

station_beacons_layout = findViewById(R.id.station_beacons_layout);        scan_beancons_layout = findViewById(R.id.scan_beancons_layout);        station_beacons = (TextView) findViewById(R.id.station_beacons);        scan_beancons = (TextView) findViewById(R.id.scan_beancons);        station_beacons_layout.setOnClickListener(this);        scan_beancons_layout.setOnClickListener(this);        fragmentManager = getSupportFragmentManager();        setTabSelection(0);

3.编写onClick方法

 public void onClick(View v) {        switch (v.getId()) {            case R.id.station_beacons_layout:                setTabSelection(0);                break;            case R.id.scan_beancons_layout:                setTabSelection(1);                break;        }    }

4.setTabSelection() 方法

<pre name="code" class="java">private void setTabSelection(int index) {        clearSelection();        FragmentTransaction transaction = fragmentManager.beginTransaction();        hideFragments(transaction);        switch (index) {            case 0:                station_beacons.setTextColor(Color.WHITE);                if (stationBeaconsFragment == null) {                    stationBeaconsFragment = new StationBeaconsFragment();                    transaction.add(R.id.content, stationBeaconsFragment);                } else {                    transaction.show(stationBeaconsFragment);                }                break;            case 1:                scan_beancons.setTextColor(Color.WHITE);                if (scanBeaconsFragment == null) {                    scanBeaconsFragment = new ScanBeaconFragment();                    transaction.add(R.id.content, scanBeaconsFragment);                } else {                    transaction.show(scanBeaconsFragment);                }                break;        }        transaction.commit();    }    private void clearSelection() {        station_beacons.setTextColor(Color.parseColor("#82858b"));        scan_beancons.setTextColor(Color.parseColor("#82858b"));    }    private void hideFragments(FragmentTransaction transaction) {        if (stationBeaconsFragment != null) {            transaction.hide(stationBeaconsFragment);        }        if (scanBeaconsFragment != null) {            transaction.hide(scanBeaconsFragment);        }    }

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