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RadioGroup结合RadioButton使用切换Fragment片段

Android 2020/05/22

##界面布局activity_lan_qiu，代码xml设置如下：

<LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

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




<LinearLayout

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@color/white"

    android:orientation="vertical">




    <FrameLayout

        android:id="@+id/fragment_container"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1"

        android:background="@color/white">




    </FrameLayout>




    <RadioGroup

        android:id="@+id/radioGroup"

        android:layout_width="match_parent"

        android:layout_height="40dp"

        android:orientation="horizontal"

        android:background="@color/colorPrimary"

        >




        <RadioButton

            android:text="首页"

            android:layout_width="wrap_content"

            android:layout_height="match_parent"

            android:id="@+id/btn_homepage"

            android:layout_weight="1"

            android:button="@null"

            android:gravity="center"

            android:textColor="@color/selector_font_color"

            android:textSize="18sp"

            />




        <RadioButton

            android:text="社区"

            android:layout_width="wrap_content"

            android:layout_height="match_parent"

            android:id="@+id/btn_message"

            android:layout_weight="1"

            android:button="@null"

            android:gravity="center"

            android:textColor="@color/selector_font_color"

            android:textSize="18sp"

            />




        <RadioButton

            android:text="运动"

            android:layout_width="wrap_content"

            android:layout_height="match_parent"

            android:id="@+id/btn_service"

            android:layout_weight="1"

            android:button="@null"

            android:gravity="center"

            android:textColor="@color/selector_font_color"

            android:textSize="18sp"

            />




        <RadioButton

            android:text="个人"

            android:layout_width="wrap_content"

            android:layout_height="match_parent"

            android:id="@+id/btn_my"

            android:layout_weight="1"

            android:button="@null"

            android:gravity="center"

            android:textColor="@color/selector_font_color"

            android:textSize="18sp"

            />

    </RadioGroup>




</LinearLayout>

##android java 类LanQiuActivity 代码如下：

public class LanQiuActivity extends FragmentActivity implements RadioGroup.OnCheckedChangeListener {

private RadioGroup radioGroup;

private RadioButton btn_homepage, btn_message, btn_service, btn_my;




public static final String fragment1Tag = "fragment1";

public static final String fragment2Tag = "fragment2";

public static final String fragment3Tag = "fragment3";

public static final String fragment4Tag = "fragment4";

private AMapLocationClient locationClient = null;

private AMapLocationClientOption locationOption = null;

private TextView tvshare;

private TextView iv_back;

String city;

public static boolean aa = true;

private Toolbar toolbar;




/**

 * 定位监听

 */

AMapLocationListener locationListener = new AMapLocationListener() {

    @Override

    public void onLocationChanged(AMapLocation location) {

        if (null != location) {




            StringBuffer sb = new StringBuffer();

            if (location.getErrorCode() == 0) {

                //解析定位结果，

                city = location.getLatitude() + ":" + location.getLongitude();

            } else {

                sb.append("定位失败" + "\n");

                sb.append("错误码:" + location.getErrorCode() + "\n");

            }

            Log.e("解析定位结果", city);

            iv_back.setText(location.getCity());

        } else {

            iv_back.setText("定位失败");

        }

        if (aa) {

            XinzhiTianqiData();

            aa = false;

        }

    }

};







/**

 * 开始定位

 *

 * @author hongming.wang

 * @since 2.8.0

 */

private void startLocation() {

    //根据控件的选择，重新设置定位参数

// resetOption();

    // 设置定位参数

    locationClient.setLocationOption(locationOption);

    // 启动定位

    locationClient.startLocation();

}




/**

 * 默认的定位参数

 *

 * @author hongming.wang

 * @since 2.8.0

 */

private AMapLocationClientOption getDefaultOption() {

    AMapLocationClientOption mOption = new AMapLocationClientOption();

    mOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);//可选，设置定位模式，可选的模式有高精度、仅设备、仅网络。默认为高精度模式

    mOption.setGpsFirst(false);//可选，设置是否gps优先，只在高精度模式下有效。默认关闭

    mOption.setHttpTimeOut(30000);//可选，设置网络请求超时时间。默认为30秒。在仅设备模式下无效

    mOption.setInterval(2000);//可选，设置定位间隔。默认为2秒

    mOption.setNeedAddress(true);//可选，设置是否返回逆地理地址信息。默认是true

    mOption.setOnceLocation(false);//可选，设置是否单次定位。默认是false

    mOption.setOnceLocationLatest(false);//可选，设置是否等待wifi刷新，默认为false.如果设置为true,会自动变为单次定位，持续定位时不要使用

    AMapLocationClientOption.setLocationProtocol(AMapLocationClientOption.AMapLocationProtocol.HTTP);//可选， 设置网络请求的协议。可选HTTP或者HTTPS。默认为HTTP

    mOption.setSensorEnable(false);//可选，设置是否使用传感器。默认是false

    mOption.setWifiScan(true); //可选，设置是否开启wifi扫描。默认为true，如果设置为false会同时停止主动刷新，停止以后完全依赖于系统刷新，定位位置可能存在误差

    mOption.setLocationCacheEnable(true); //可选，设置是否使用缓存定位，默认为true

    return mOption;

}




/**

 * 初始化定位

 *

 * @author hongming.wang

 * @since 2.8.0

 */

private void initLocation() {

    //初始化client

    locationClient = new AMapLocationClient(getApplicationContext());

    locationOption = getDefaultOption();

    //设置定位参数

    locationClient.setLocationOption(locationOption);

    // 设置定位监听

    locationClient.setLocationListener(locationListener);

// XinzhiTianqiData();

}




private void XinzhiTianqiData() {

    RequestParams params = new RequestParams();

    params.put("location", city);

    Log.e("天气XinzhiTianqiData", "天气XinzhiTianqiData");

    AsyncHttpClientUtil.getInstance().get(Constants.XinzhiTianqi, params, new AsyncHttpResponseHandler() {

        @Override

        public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {

            String s = new String(responseBody);

// Log.e(“天气”, “”+s);

            XinzhiModle xinzhiModle = GsonUtils.parseJSON(s, XinzhiModle.class);

            List<XinzhiModle.ResultsBean> results = xinzhiModle.getResults();

            String text = results.get(0).getNow().getText();

            tvshare.setText("天气: " + text);

        }




        @Override

        public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {

        }

    });

}




@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    if (savedInstanceState == null) {

        FragmentManager fragmentManager = getSupportFragmentManager();

        Fragment fragment = new HomeFragment();

        fragmentManager.beginTransaction().replace(R.id.fragment_container, fragment, fragment1Tag).commit();

    }

    setContentView(R.layout.activity_lan_qiu);

    toolbar = (Toolbar) findViewById(R.id.tool_bar);

    TextView tool_bar_title = (TextView)findViewById(R.id.tool_bar_title);

    tool_bar_title.setVisibility(View.GONE);

    tvshare = (TextView)findViewById(R.id.tv_share1);

    iv_back = (TextView)findViewById(R.id.iv_back1);

    iv_back.setVisibility(View.VISIBLE);

    tvshare.setVisibility(View.VISIBLE);

    iv_back.setTextSize(22);

    tvshare.setTextSize(22);

    radioGroup = (RadioGroup) this.findViewById(R.id.radioGroup);

    btn_homepage = (RadioButton) this.findViewById(R.id.btn_homepage);

    btn_homepage.setSelected(true);

    btn_message = (RadioButton) this.findViewById(R.id.btn_message);

    btn_service = (RadioButton) this.findViewById(R.id.btn_service);

    btn_my = (RadioButton) this.findViewById(R.id.btn_my);

    initLocation();

    startLocation();

    radioGroup.setOnCheckedChangeListener(this);

}







public static void start(Context context, SzBean szBean) {

    Intent starter = new Intent(context, MainActivity.class);

    starter.putExtra(ParamsKey.EXTRA_SZBEAN, szBean);

    context.startActivity(starter);

}

//选中首页界面RadioButton处理事件

private void HomePageSelect() {

    btn_homepage.setSelected(true);

    btn_message.setSelected(false);

    btn_service.setSelected(false);

    btn_my.setSelected(false);

}

//选中信息界面RadioButton处理事件

private void MessageSelect() {

    btn_homepage.setSelected(false);

    btn_message.setSelected(true);

    btn_service.setSelected(false);

    btn_my.setSelected(false);

}

##//选中记录RadioButton处理事件

private void RecordSelect() {

    btn_homepage.setSelected(false);

    btn_message.setSelected(false);

    btn_service.setSelected(true);

    btn_my.setSelected(false);

}

##//选中我的界面RadioButton处理事件

private void MySelect() {

    btn_homepage.setSelected(false);

    btn_message.setSelected(false);

    btn_service.setSelected(false);

    btn_my.setSelected(true);

}

##//在RadioGroup中切换改变选中RadioButton事件，处理跳转到相应界面

@Override

public void onCheckedChanged(RadioGroup radioGroup, int i) {

    FragmentManager fm = getSupportFragmentManager();

    FragmentTransaction ft = fm.beginTransaction();

    Fragment fragment1 = fm.findFragmentByTag(fragment1Tag);

    Fragment fragment2 = fm.findFragmentByTag(fragment2Tag);

    Fragment fragment3 = fm.findFragmentByTag(fragment3Tag);

    Fragment fragment4 = fm.findFragmentByTag(fragment4Tag);

    if (fragment1 != null) {

        ft.hide(fragment1);

    }

    if (fragment2 != null) {

        ft.hide(fragment2);

    }

    if (fragment3 != null) {

        ft.hide(fragment3);

    }

    if (fragment4 != null) {

        ft.hide(fragment4);

    }

    switch (i) {

        case R.id.btn_homepage:

            toolbar.setVisibility(View.VISIBLE);

            if (fragment1 == null) {

                fragment1 = new HomeFragment();

                ft.add(R.id.fragment_container, fragment1, fragment1Tag);

            } else {

                ft.show(fragment1);

            }

            HomePageSelect();

            break;

        case R.id.btn_message:

            toolbar.setVisibility(View.VISIBLE);

            if (fragment2 == null) {

                fragment2 = new BBsFragment();

                ft.add(R.id.fragment_container, fragment2, fragment2Tag);

            } else {

                ft.show(fragment2);

            }

            MessageSelect();

            break;

        case R.id.btn_service:

            toolbar.setVisibility(View.VISIBLE);

            if (fragment3 == null) {

                fragment3 = new SportFragment();

                ft.add(R.id.fragment_container, fragment3, fragment3Tag);

            } else {

                ft.show(fragment3);

            }

            RecordSelect();

            break;

        case R.id.btn_my:

            toolbar.setVisibility(View.GONE);

            if (fragment4 == null) {

                fragment4 = new PersonalCenteFragment();

                ft.add(R.id.fragment_container, fragment4, fragment4Tag);

            } else {

                ft.show(fragment4);

            }

            MySelect();

            break;

    }

    ft.commit();

}




##//app退到后台，我们去玩其他的app，过一段时间回来，这个时候我们的app已经被销毁，我们按多任务键切换回来，发现界面上多个Fragment出现了重叠的情况，这是因为多个Fragment同时显示了，出现了重叠的情况，解决的办法如下：重写Activity的onRestoreInstanceState方法

@Override

protected void onRestoreInstanceState(Bundle savedInstanceState) {

    super.onRestoreInstanceState(savedInstanceState);

    for (int i = 0; i < radioGroup.getChildCount(); i++) {

        RadioButton mTab = (RadioButton) radioGroup.getChildAt(i);

        FragmentManager fm = getSupportFragmentManager();

        Fragment fragment = fm.findFragmentByTag((String) mTab.getTag());

        FragmentTransaction ft = fm.beginTransaction();

        if (fragment != null) {

            if (!mTab.isChecked()) {

                ft.hide(fragment);

            }

        }

        ft.commit();

    }

}




private long mExitTime;







##//按back提示再按一次退出




public boolean onKeyDown(int keyCode, KeyEvent event) {

    if (keyCode == KeyEvent.KEYCODE_BACK) {

        if ((System.currentTimeMillis() - mExitTime) > 2000) {

            Toast.makeText(getApplicationContext(), "再按一次退出", Toast.LENGTH_SHORT).show();

            mExitTime = System.currentTimeMillis();

        } else {

            finish();

            System.exit(0);

        }

        return true;

    }

    return super.onKeyDown(keyCode, event);

}

}

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