问题似乎是，在罕见的情况下，碎片似乎以一种非常奇怪的方式加载。
有时片段的视图不可见，调用onCreateView，但它不会将视图添加到活动中，只是加载一个空白的白色页面。当从恢复应用程序调用onResume时（例如转到最近的应用程序并单击我的应用程序），会显示该视图。
显然，所有的碎片事务都是在MAIN线程上完成的。
这种情况大约每20次发生1次。
我很乐意提供您想要的任何代码。所以，如果有什么东西不见了，请告诉我，我会很乐意为你提供
我的活动中的onCreate：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Variables.context = this;
Variables.activity = this;
Variables.p_class = HomeActivity.class;
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
if (getSupportActionBar() != null) {
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
}
toolbar.setNavigationIcon(null);
toolbar.getMenu().clear();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
actionbar_pw_spinner = (ProgressWheel) findViewById(R.id.actionbar_pw_spinner);
actionbar_pw_mins = (TextView) findViewById(R.id.actionbar_pw_mins);
actionBarTitleTV = (TextView) findViewById(R.id.custom_actionbar_title);
usersName = (TextView) findViewById(R.id.usersName);
usersEmail = (TextView) findViewById(R.id.usersEmail);
actionBarTitleTV.setText(this.getTitle());
btnBack = (ImageView) findViewById(R.id.button_back);
btnBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
btnBack.setVisibility(View.GONE);
btnMenu = (ImageView) findViewById(R.id.button_menu);
btnMenu.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openDrawer();
}
});
btnMenu.setVisibility(View.GONE);
setPersonInfo();
Fabric.with(this, new Crashlytics());
Variables.myLocation = new Location("myLoc");
Variables.myLocation.setLatitude(0.0);
Variables.myLocation.setLongitude(0.0);
if (!Variables.isThisBidTaxi()) {
CustomerComms.myOwnSocket = new MySocket(null);
CustomerComms.myOwnSocket.start();
}
SettingSQLHelper helper = new SettingSQLHelper(HomeActivity.this);
Variables.setting = helper.getSetting();
helper.close();
mRequestingLocationUpdates = false;
buildGoogleApiClient();
createLocationRequest();
buildLocationSettingsRequest();
checkLocationSettings();
setTitle("");
if (savedInstanceState != null) {
return;
} else {
getSupportFragmentManager().beginTransaction().add(R.id.fragmentspace, new SplashFragment()).commitAllowingStateLoss();
((HomeActivity) Variables.context).getSupportFragmentManager().executePendingTransactions();
}
containLayout = null;
containLayout = (FrameLayout) findViewById(R.id.fragmentspace);
getSupportFragmentManager().addOnBackStackChangedListener(getListener());
m_updateBooking = (Booking) getIntent().getSerializableExtra("booking");
m_TrackDriver = (Boolean) getIntent().getSerializableExtra("track");
Variables.initBooking();
}
我的onResume在我的活动中：
protected void onResume() {
super.onResume();
if (mGoogleApiClient.isConnected() && mRequestingLocationUpdates) {
startLocationUpdates();
}
Variables.context = this;
Variables.activity = this;
if (m_updateBooking != null) {
if (m_updateBooking.getJobStatus() == Booking.eeJob_Complete) {
if (!Variables.driverrated) {
DriverRatingFragment DriverRatingFRA = DriverRatingFragment.newInstance(m_updateBooking);
getSupportFragmentManager().beginTransaction().add(R.id.fragmentspace, DriverRatingFRA).addToBackStack(DriverRatingFragment.class.getName()).commitAllowingStateLoss();
((HomeActivity) Variables.context).getSupportFragmentManager().executePendingTransactions();
}
} else {
if (m_TrackDriver) {
getSupportFragmentManager().beginTransaction().add(R.id.fragmentspace, TrackingDriverFragment.newInstance(m_updateBooking)).addToBackStack(TrackingDriverFragment.class.getName()).commitAllowingStateLoss();
((HomeActivity) Variables.context).getSupportFragmentManager().executePendingTransactions();
} else {
gotoMyBooking(m_updateBooking);
}
}
}
m_updateBooking = null;
getIntent().removeExtra("booking");
getIntent().removeExtra("track");
if (Variables.setting == null) {
final SettingSQLHelper helper = new SettingSQLHelper(HomeActivity.this);
Variables.setting = helper.getSetting();
}
}
我的onPause
@Override
protected void onPause() {
super.onPause();
if (mGoogleApiClient.isConnected()) {
stopLocationUpdates();
}
}
My onCreateView inside a fragment looks like this:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
inflatedView = inflater.inflate(R.layout.fragment_new_booking, container, false);//the rest of my code then follows here
return inflaterview
}
我的活动XML文件如下所示：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ProgressWheel="http://schemas.android.com/apk/res-auto"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".Activity.HomeActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true">
<TextView
android:id="@+id/custom_actionbar_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:singleLine="true"
android:text="@string/new_booking"
android:textColor="@color/White"
android:textSize="18sp" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical">
<ImageView
android:id="@+id/button_back"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical|start"
android:contentDescription="@string/back_button"
android:fitsSystemWindows="true"
android:src="@drawable/ic_arrow_back_white_24dp" />
<ImageView
android:id="@+id/button_menu"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical|start"
android:contentDescription="@string/menu_button"
android:fitsSystemWindows="true"
android:src="@drawable/ic_menu_white_24dp" />
</FrameLayout>
<com.todddavies.components.progressbar.ProgressWheel
android:id="@+id/actionbar_pw_spinner"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="top|end"
android:layout_marginRight="10dp"
android:visibility="gone"
ProgressWheel:barColor="#86f066"
ProgressWheel:barLength="10dp"
ProgressWheel:barWidth="1dp"
ProgressWheel:rimColor="@color/White"
ProgressWheel:rimWidth="2dp"
ProgressWheel:textColor="@color/White"
ProgressWheel:textSize="15sp" />
<TextView
android:id="@+id/actionbar_pw_mins"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginRight="15dp"
android:layout_marginTop="27dp"
android:text="@string/mins"
android:textColor="@color/White"
android:textSize="10sp"
android:visibility="gone" />
</FrameLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="@+id/fragmentspace"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/White" />
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
我的Android清单如下：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.commandsoftware.androidbookingapp"
android:installLocation="auto">
<uses-permission android:name="com.chasesoftware.cabmaster.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">>
<activity
android:name=".Activity.HomeActivity"
android:label="@string/app_name"
android:noHistory="false"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="@string/google_api" />
<receiver android:name=".Activity.SMSReceiver">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
<meta-data
android:name="io.fabric.ApiKey"
android:value="@string/fabric_key" />
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="@string/facebook_app_id" />
<provider
android:name="com.facebook.FacebookContentProvider"
android:authorities="@string/facebook_api"
android:exported="false" />
<activity
android:name="com.facebook.FacebookActivity"
android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:label="@string/app_name"
android:theme="@android:style/Theme.Translucent.NoTitleBar" />
</application>
</manifest>
当我提交Fragment事务时，我的代码如下：
((HomeActivity) Variables.context).getSupportFragmentManager().beginTransaction().remove(((HomeActivity) Variables.context).getSupportFragmentManager().findFragmentById(R.id.fragmentspace)).commitAllowingStateLoss();
((HomeActivity) Variables.context).getSupportFragmentManager().executePendingTransactions();
((HomeActivity) Variables.context).getSupportFragmentManager().beginTransaction().add(R.id.fragmentspace, new MyBidsFragment().newInstance(booking)).addToBackStack(MyBidsFragment.class.getName()).commitAllowingStateLoss();
((HomeActivity) Variables.context).getSupportFragmentManager().executePendingTransactions();
碎片交易的另一个例子
myBookingsFragment = MyBookingsFragment.newInstance(updateBooking);
getSupportFragmentManager().beginTransaction().add(R.id.fragmentspace, myBookingsFragment).addToBackStack(myBookingsFragment.getClass().getName()).commitAllowingStateLoss();
getSupportFragmentManager().executePendingTransactions();
我从开始
-
替换：
((HomeActivity) Variables.context).getSupportFragmentManager().beginTransaction().remove(((HomeActivity) Variables.context).getSupportFragmentManager().findFragmentById(R.id.fragmentspace)).commitAllowingStateLoss(); ((HomeActivity) Variables.context).getSupportFragmentManager().executePendingTransactions(); ((HomeActivity) Variables.context).getSupportFragmentManager().beginTransaction().add(R.id.fragmentspace, new MyBidsFragment().newInstance(booking)).addToBackStack(MyBidsFragment.class.getName()).commitAllowingStateLoss(); ((HomeActivity) Variables.context).getSupportFragmentManager().executePendingTransactions();带有
((HomeActivity) getActivity()).getSupportFragmentManager(). beginTransaction(). replace(R.id.fragmentspace, new MyBidsFragment().newInstance(booking)). commit();（顺便说一句，让
newInstance()成为static，这样你就不会对MyBidsFragment的新实例进行这种奇怪的初始化） -
然后更换
myBookingsFragment = MyBookingsFragment.newInstance(updateBooking); getSupportFragmentManager().beginTransaction().add(R.id.fragmentspace, myBookingsFragment).addToBackStack(myBookingsFragment.getClass().getName()).commitAllowingStateLoss(); getSupportFragmentManager().executePendingTransactions();带有
myBookingsFragment = MyBookingsFragment.newInstance(updateBooking); getSupportFragmentManager().beginTransaction(). replace(R.id.fragmentspace, myBookingsFragment). addToBackStack(myBookingsFragment.getClass().getName()). commit();replace()，而不是add() -
然后我会对"活动"有1000行代码这一事实做点什么。它使代码更难维护和理解（甚至在SO上发布）
我希望它能帮助