[英]Can't Open Fragment when clicked button
我已經創建了2個片段及其布局,當我在配置文件片段上單擊按鈕時,它應該打開平面布局,但是它強制停止應用程序並且沒有打開第二個片段,我已經包含了片段代碼及其布局代碼。
profilefragment.java
public class ProfileFragment extends Fragment {
View rootView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.profile, container, false);
Button button = (Button) rootView.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
onButtonClicked(v);
}
});
return rootView;
}
public void onButtonClicked(View view)
{
//do your stuff here..
final FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.button, new flatview(), "NewFragmentTag");
ft.commit();
}
profile.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${packageName}.${activityClass}"
android:id="@+id/semester">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
flatview.java
public class flatview extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.flat, container, false);
}
flat.xml
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="second fragement"
android:id="@+id/textView3"
android:layout_gravity="center_horizontal" />
日志貓
06-19 07:57:56.945 26457-26457/com.idealdeveloper.saltechnical E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.idealdeveloper.saltechnical, PID: 26457
java.lang.ClassCastException: android.widget.Button cannot be cast to android.view.ViewGroup
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:917)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:440)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
試試這個,我想它將為您服務
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${packageName}.${activityClass}"
android:id="@+id/semester">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/fragmentLayout"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
類
public class ProfileFragment extends Fragment {
View rootView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.profile, container, false);
Button button = (Button) rootView.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
onButtonClicked(v);
}
});
return rootView;
}
public void onButtonClicked(View view)
{
//do your stuff here..
final FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.add(R.id.fragmentLayout, new flatview(), "NewFragmentTag");
ft.commit();
}
希望這對您有幫助
片段事務將View
插入ViewGroup
,因此您不能僅僅替換Button
。 您可以只替換上semester
,因為它是一個ViewGroup
。
public void onButtonClicked(View view) {
final FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.semester, new flatview(), "NewFragmentTag");
ft.commit();
}
如果您還打算刪除按鈕,則您將需要手動執行此操作,因為FragmentManager
只能修改運行時事務:
ViewGroup parent = (ViewGroup) getActivity().findViewById(R.id.semester);
parent.removeView(view);
您必須為flat.xml布局提供ViewGroup
根目錄,例如,可以使用LinearLayout
包圍TextView
flat.xml:
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="second fragement"
android:id="@+id/textView3"
android:layout_gravity="center_horizontal" />
</LinearLayout>
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