我试图在我的主 Activity 中包含两个 fragment ，但它导致类未找到异常问题
第一个 fragment 类(SearchFragment.class)
public class SearchFragment extends Fragment{
public SearchFragment(){
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.search_fragment, container, false);
}
}
fragment 的第一个 xml(search_fragment.xml)
<?xml version="1.0" encoding="utf-8"?>
<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"
android:padding="5dp"
tools:context=".SearchFragment" >
<EditText
android:id="@+id/etSearch"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_toLeftOf="@+id/butFilter"
android:background="@drawable/custom_form"
android:ems="10"
android:paddingRight="77dp" >
</EditText>
<Button
android:id="@+id/butFilter"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="5dp"
android:background="@drawable/custom_filter"
android:text="" />
<Button
android:id="@+id/butSearch"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentTop="true"
android:layout_alignRight="@+id/etSearch"
android:layout_marginLeft="10dp"
android:background="@drawable/custom_search"
android:padding="5dp"
android:text="" />
<Button
android:id="@+id/butDelete"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_alignParentTop="true"
android:layout_marginTop="7dp"
android:layout_toLeftOf="@+id/butSearch"
android:background="@drawable/custom_delete"
android:text="x" />
第二个 fragment 类(ContentFragment.class)
public class ContentFragment extends Fragment {
public ContentFragment(){
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.content_fragment, container, false);
}
}
第二个 xml fragment (content_fragment.xml)
<?xml version="1.0" encoding="utf-8"?>
<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=".ContentFragment" >
</RelativeLayout>
主 xml 文件(main.xml)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="@+id/fragment1"
android:name="com.guru.alex.SearchFragment”"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<fragment
android:id="@+id/fragment2"
android:name="com.guru.alex.ContentFragment”"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/fragment1" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<SlidingDrawer
android:id="@+id/slidingDrawer1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:content="@+id/content"
android:handle="@+id/handle"
android:orientation="horizontal"
android:rotation="180" >
<Button
android:id="@+id/handle"
android:layout_width="15dp"
android:layout_height="match_parent"
android:background="@android:color/transparent"
android:text=""
android:visibility="invisible" />
<RelativeLayout
android:id="@+id/content"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#333"
android:orientation="vertical"
android:rotation="180" >
<TextView
android:id="@+id/tvCat"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#f37c20"
android:gravity="center"
android:text="Category"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#333" />
<ExpandableListView
android:id="@+id/elvItem"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/tvCat"
android:animateLayoutChanges="true"
android:divider="@drawable/custom_divider"
android:dividerHeight="0dp"
android:groupIndicator="@drawable/custom_group_indicator"
android:transcriptMode="normal" >
</ExpandableListView>
</RelativeLayout>
</SlidingDrawer>
<SlidingDrawer
android:id="@+id/slidingDrawer2"
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_gravity="right"
android:content="@+id/content2"
android:handle="@+id/handle2"
android:orientation="horizontal" >
<Button
android:id="@+id/handle2"
android:layout_width="15dp"
android:layout_height="match_parent"
android:background="@android:color/transparent"
android:text=""
android:visibility="invisible" />
<RelativeLayout
android:id="@+id/content2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
android:orientation="vertical" >
<ImageView
android:id="@+id/imgUser"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginBottom="10dp"
android:background="#ccc"
android:contentDescription="User Profile Picture"
android:src="@drawable/default_user" />
<ExpandableListView
android:id="@+id/elvSignIn"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_below="@+id/imgUser"
android:animateLayoutChanges="true"
android:dividerHeight="0dp"
android:groupIndicator="@drawable/custom_group_indicator"
android:indicatorLeft="180dp"
android:transcriptMode="disabled" >
</ExpandableListView>
</RelativeLayout>
</SlidingDrawer>
</FrameLayout>
</RelativeLayout>
最佳答案
尝试以下更改:
MainActivity.java应扩展FragmentActivity。确保
SearchFragment和ContentFragment使用import android.support.v4.app.Fragment并且MainActivity.java使用import android.support.v4.app.FragmentActivity。您在
main.xml中声明 fragment 时使用了额外的双引号。还将 android.name 更改为 class。
例如:
<fragment
android:id="@+id/fragment1"
class="com.guru.alex.SearchFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<fragment
android:id="@+id/fragment2"
class="com.guru.alex.ContentFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/fragment1" />
关于java - 膨胀 fragment 时发现类未找到异常，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34577972/