RadioGroup结合RadioButton使用切换Fragment片段
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界面布局activity_lan_qiu，代码xml设置如下：
<?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">
<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>
</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);
}
}
本文出自 “严益云技术博客” 博客，谢绝转载！
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