我整天都被困在这里,而且我似乎无法在这里找到适合我的情况的答案,足以让我投入使用。
以下是我的用户界面,标签和列表视图功能很好:http://i.stack.imgur.com/84kRY.png
当我单击列表项目(如蓝色)时,我希望它显示一个蓝色屏幕的新片段,并且在横向上它会在屏幕的一半显示该片段,而在另一个屏幕上显示列表视图。我正在使用ActionBarSherlock和片段来实现这一目标。
我是从内到外构建的,所以我从一个列表开始,它按照我想要的方式工作。然后我添加了选项卡,寻呼机功能和其他列表。在该过程的某个地方,片段显示停止工作,每次我点击任何东西我都会崩溃。
这是我的一个ListView活动的点击部分
public class TitlesFragment extends SherlockListFragment{
boolean mDualPane;
int mCurCheckPosition = 0;
.
.
.
@Override
public void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id){
showDetails(position);
}
void showDetails(int position){
SherlockFragment newContent = new SherlockFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
if(mDualPane){
switch(position){
case 0:
newContent = new Blue();
break;
case 1:
newContent = new Red();
break;
case 2:
newContent = new Green();
break;
case 3:
newContent = new Yellow();
break;
case 4:
newContent = new Purple();
break;
} ft.replace(R.id.details, newContent);
} else {
switch(position){
case 0:
newContent = new Blue();
break;
case 1:
newContent = new Red();
break;
case 2:
newContent = new Green();
break;
case 3:
newContent = new Yellow();
break;
case 4:
newContent = new Purple();
break;
}ft.replace(R.id.titles, newContent);
}
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
return;
}
}
这是Blue class
public class Blue extends SherlockFragment{
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
return inflater.inflate(R.layout.blue, container, false);
}
}
蓝色布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/blue"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#0000FF"
android:orientation="vertical" >
</LinearLayout>
我希望它在横向
中替换的布局<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:orientation="horizontal"
android:id="@+id/fragment_layout_support_land" >
<fragment
android:id="@+id/titles_land"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="1"
class="***.TitlesFragment" />
<fragment
android:id="@+id/details"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="2" />
</LinearLayout>
以纵向替换的布局
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragment_layout_support"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="@+id/titles"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="***.TitlesFragment" />
</FrameLayout>
最后我的LogCat
我使用了一个教程来获取之前的片段。我无法发布更多链接,但您可以在youtube上找到它,名为ListFragment Tutorial Part 2。
此时我对任何事情持开放态度,包括从头开始并以不同方式执行代码,但我更想了解这里发生了什么以及为什么,所以我可以从中学习。谢谢!
修改 尝试了一些新的错误并得到了新的错误
@Override
public void onListItemClick(ListView l, View v, int position, long id){
showDetails(position);
}
void showDetails(int position){
SherlockFragment newContent = new SherlockFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.add(R.id.fragment_layout_support, newContent);
transaction.commit();
if(mDualPane){
switch(position){
case 0:
newContent = new Blue();
break;
case 1:
newContent = new Red();
break;
case 2:
newContent = new Green();
break;
case 3:
newContent = new Yellow();
break;
case 4:
newContent = new Purple();
break;
} transaction.add(R.id.fragment_layout_support_land, newContent);
} else {
switch(position){
case 0:
newContent = new Blue();
break;
case 1:
newContent = new Red();
break;
case 2:
newContent = new Green();
break;
case 3:
newContent = new Yellow();
break;
case 4:
newContent = new Purple();
break;
}transaction.replace(R.id.fragment_layout_support, newContent);
}
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.addToBackStack(null);
transaction.commit();
return;
}
}
新版LogCat
FATAL EXCEPTION: main java.lang.IllegalStateException: commit already called
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:582)
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
at [package].TitlesFragment.showDetails(TitlesFragment.java:97)
at [package].TitlesFragment.onListItemClick(TitlesFragment.java:44)
at android.support.v4.app.ListFragment$2.onItemClick(ListFragment.java:58)
at android.widget.AdapterView.performItemClick(AdapterView.java:298)
at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:2788)
at android.widget.AbsListView$1.run(AbsListView.java:3463)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分:6)
您应该将肖像xml更改为:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragment_layout_support"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="@+id/titles"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="1" />
</FrameLayout>
在MainActivity
的{{1}}方法中,输入:
onCreate
请更改@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TitlesFragment title = new TitlesFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.titles, title).commit();
}
或中的代码,请参阅下面的TitlesFragment
。
注意:对于Landscape,我希望你能自己解决。您当前的处理方式showDetails
,IMO并不是最好的方法。请阅读Layout Aliases了解详情。
额外:您不必创建land-portrait
,Blue
,Green
,Red
类。您可以创建Yellow
类。
Rainbow
将您的public class Rainbow extends SherlockFragment {
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View view = inflater.inflate(R.layout.rainbow, container, false);
// default color
int color = Color.WHITE;
// get the color if provided through setArguments(Bundle args)
if (getArguments() != null) {
color = getArguments().getInt("color");
}
view.findViewById(R.id.rainbow).setBackgroundColor(color);
return view;
}
}
更改为:
showDetails