抱歉我的英文
我应该配置更改期间通过getArguments()
\ {保存和还原参数(由outState
返回) {1}}?
或者savedInstanceState
总是在配置更改后返回传递的参数?
答案 0 :(得分:8)
我只能回答否。
您不必保存您的论据,它将自动完成。
这就是为什么:(也许我错了,但源代码说明了这一点:)
在android支持库v4中
Android的SDK /额外/机器人/支撑/ V4 / SRC / JAVA /机器人/支撑/ V4 /应用程序/ Fragment.java
你有方法:
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(mClassName);
dest.writeInt(mIndex);
dest.writeInt(mFromLayout ? 1 : 0);
dest.writeInt(mFragmentId);
dest.writeInt(mContainerId);
dest.writeString(mTag);
dest.writeInt(mRetainInstance ? 1 : 0);
dest.writeInt(mDetached ? 1 : 0);
dest.writeBundle(mArguments);//<---------------------------- Look here
dest.writeBundle(mSavedFragmentState);
}
mArgument
的位置:
/**
* Supply the construction arguments for this fragment. This can only
* be called before the fragment has been attached to its activity; that
* is, you should call it immediately after constructing the fragment. The
* arguments supplied here will be retained across fragment destroy and
* creation.
*/
public void setArguments(Bundle args) {
if (mIndex >= 0) {
throw new IllegalStateException("Fragment already active");
}
mArguments = args;
}
并在
/**
* State information that has been retrieved from a fragment instance
* through {@link FragmentManager#saveFragmentInstanceState(Fragment)
* FragmentManager.saveFragmentInstanceState}.
*/
public static class SavedState implements Parcelable {
final Bundle mState;
SavedState(Bundle state) {
mState = state;
}
SavedState(Parcel in, ClassLoader loader) {
mState = in.readBundle();
if (loader != null && mState != null) {
mState.setClassLoader(loader);
}
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeBundle(mState);
}
public static final Parcelable.Creator<SavedState> CREATOR
= new Parcelable.Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in, null);
}
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
它被执行了。在评论中你可以读到这是使用:)。我也检查了代码,是的,它已保存。
在FragmentManager.java中
@Override
public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) {
if (fragment.mIndex < 0) {
throwException( new IllegalStateException("Fragment " + fragment
+ " is not currently in the FragmentManager"));
}
if (fragment.mState > Fragment.INITIALIZING) {
Bundle result = saveFragmentBasicState(fragment);
return result != null ? new Fragment.SavedState(result) : null;
}
return null;
}
此外,我已经在Android上测试了几次,它仍然看起来它正在工作:)
答案 1 :(得分:4)
是的,Android会在配置更改后继续传递参数。
答案 2 :(得分:3)
答案 3 :(得分:0)
您是否要进行此配置更改。 在清单文件中,您可以进行此条目以避免更改