当屏幕旋转片段变动 [英] Fragment Changes when Screen is rotated
本文介绍了当屏幕旋转片段变动的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有两个片段，FragmentCity和Fragmentnumber1。当屏幕方向上fragmentnumber1变化，它可以追溯到FragmentCity。有谁知道如何解决此问题？我AP preciate它，如果你能告诉我怎么解决这个问题。
FragmentCity
公共类FragmentCity扩展片段{ 最终的String []项目=新的String [] {FC1，FC2，FC3，FC4，FC5
}; @覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
捆绑savedInstanceState）{ 查看查看= inflater.inflate（R.layout.haz，集装箱，FALSE）; ListView控件列表=（ListView控件）view.findViewById（R.id.fir）;
ArrayAdapter＆LT;串GT;适配器=新ArrayAdapter＆LT;串GT;（getActivity（），android.R.layout.simple_list_item_1，项目）;
list.setAdapter（适配器）; list.setOnItemClickListener（新AdapterView.OnItemClickListener（）{ @覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;为arg0，ARG1观，诠释ARG2，
长ARG3）{ 片段myFragment = NULL; 开关（ARG2）{ 情况下0：
myFragment =新Fragmentnumber1（）;
打破;
情况1：
myFragment =新Fragmentnumber2（）;
打破;
案例2： myFragment =新Fragmentnumber3（）;
打破;
案例3：
myFragment =新Fragmentnumber4（）;
打破;
情况4：
myFragment =新Fragmentnumber5（）; 打破; }
//更新替换片段的主要内容 FragmentManager fragmentManager = getActivity（）getSupportFragmentManager（）。
fragmentManager.popBackStackImmediate（NULL，FragmentManager.POP_BACK_STACK_INCLUSIVE）;
fragmentManager.beginTransaction（）。addToBackStack（断枝）
.replace（R.id.container2，myFragment）
。承诺（）;
} }）;
返回视图。
}}
Fragmentnumber1
公共类Fragmentnumber1扩展片段{ 最终的String []项目=新的String [] {NUM1，NUM2，NUM3
}; @覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
捆绑savedInstanceState）{ 查看查看= inflater.inflate（R.layout.haz，集装箱，FALSE）; ListView控件列表=（ListView控件）view.findViewById（R.id.fir）;
ArrayAdapter＆LT;串GT;适配器=新ArrayAdapter＆LT;串GT;（getActivity（），android.R.layout.simple_list_item_1，项目）;
list.setAdapter（适配器）; list.setOnItemClickListener（新AdapterView.OnItemClickListener（）{ @覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;为arg0，ARG1观，诠释ARG2，
长ARG3）{ 片段myFragment = NULL;
开关（ARG2）{
情况下0：
myFragment =新NUM1（）;
打破;
情况1：
myFragment =新NUM2（）;
打破;
案例2：
myFragment =新NUM3（）;
打破; }
//更新替换片段的主要内容
FragmentManager fragmentManager = getChildFragmentManager（）;
fragmentManager.beginTransaction（）。addToBackStack（空）
.replace（R.id.container2，myFragment）
。承诺（）;
} }）;
返回视图。
}
}
解决方案
尝试添加下面一行到你的含活性（大概 MainActivity ）的清单
＆LT;活动机器人：名字=。MainActivity
机器人：configChanges =keyboardHidden |方向|屏幕尺寸/＆GT;
这将使该活动横跨方向改变维护它的状态。
I have two fragments, FragmentCity and Fragmentnumber1. When screen orientation changes on fragmentnumber1, it goes back to FragmentCity. Does anyone know how to solve this? I appreciate it if you could show me how to solve this issue
FragmentCity
public class FragmentCity extends Fragment {
final String[] items = new String[]{"FC1", "FC2", "FC3", "FC4","FC5"
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.haz, container, false);
ListView list = (ListView) view.findViewById(R.id.fir);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, items);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Fragment myFragment = null;
switch (arg2) {
case 0:
myFragment = new Fragmentnumber1();
break;
case 1:
myFragment = new Fragmentnumber2();
break;
case 2:
myFragment = new Fragmentnumber3();
break;
case 3:
myFragment = new Fragmentnumber4();
break;
case 4:
myFragment = new Fragmentnumber5();
break;
}
// update the main content by replacing fragments
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
fragmentManager.popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
fragmentManager.beginTransaction().addToBackStack("frag")
.replace(R.id.container2, myFragment)
.commit();
}
});
return view;
}
}
Fragmentnumber1
public class Fragmentnumber1 extends Fragment {
final String[] items = new String[]{"num1", "num2", "num3"
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.haz, container, false);
ListView list = (ListView) view.findViewById(R.id.fir);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, items);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Fragment myFragment = null;
switch (arg2){
case 0:
myFragment = new num1();
break;
case 1:
myFragment = new num2();
break;
case 2:
myFragment = new num3();
break;
}
// update the main content by replacing fragments
FragmentManager fragmentManager = getChildFragmentManager();
fragmentManager.beginTransaction().addToBackStack(null)
.replace(R.id.container2, myFragment)
.commit();
}
});
return view;
}
}
解决方案
Try adding the following line to your containing activity (probably MainActivity) in the manifest
<activity android:name=".MainActivity"
android:configChanges="keyboardHidden|orientation|screenSize"/>
This will allow the Activity to maintain it's state across orientation changes.
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