Java.lang.IllegalStateException:Fragment bb{42261900} not attached to Activity

A. Handling exceptions Java.lang.IllegalStateException:Fragment bb{42261900} not attached to Activity
Processing: Due to calls in the thread fragment the following methods will appear fragment has not been attached to the activity,
So when calling these methods, add isadded () to judge
Fragment source
--------------------1-----------------------------
Public final Resources Getresources ()
{
if (this.mactivity = = null) {
throw new IllegalStateException ("Fragment" + this + "not attached to Activity");
}
return this.mActivity.getResources ();
}

Public final charsequence getText (int resId)
{
Return Getresources (). GetText (ResId);
}

Public final String getString (int resId)
{
Return Getresources (). getString (ResId);
}

Public final String getString (int resId, object[] formatargs)
{
Return Getresources (). getString (ResId, Formatargs);
}
-----------------2--------------------
Public Loadermanager Getloadermanager ()
{
if (This.mloadermanager! = null) {
return this.mloadermanager;
}
if (this.mactivity = = null) {
throw new IllegalStateException ("Fragment" + this + "not attached to Activity");
}
This.mcheckedforloadermanager = true;
This.mloadermanager = This.mActivity.getLoaderManager (this.mwho, this.mloadersstarted, true);
return this.mloadermanager;
}
-----------------3--------------------
public void StartActivity (Intent Intent)
{
if (this.mactivity = = null) {
throw new IllegalStateException ("Fragment" + this + "not attached to Activity");
}
This.mActivity.startActivityFromFragment (This, intent,-1);
}
-----------------4--------------------
public void Startactivityforresult (Intent Intent, int requestcode)
{
if (this.mactivity = = null) {
throw new IllegalStateException ("Fragment" + this + "not attached to Activity");
}
This.mActivity.startActivityFromFragment (this, intent, requestcode);
}

Java.lang.IllegalStateException:Fragment bb{42261900} not attached to Activity