我正在尝试创建一个包含三个垂直面板的布局 - 2 个片段和 1 个框架布局。第一个片段将是选择列表,第二个片段将有不同的内容。从第二个片段中选择一个列表项时,第三个窗格将显示详细信息。
这是我的布局文件:
activity_three_pane.xml:
<LinearLayout 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:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:divider="?android:attr/dividerHorizontal"
android:orientation="horizontal"
android:showDividers="middle"
tools:context=".ActivitySectionList" >
<fragment
android:id="@+id/frg_section_list"
android:name="eam.droid.pt.entholkaappiyam.FragmentSectionList"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
tools:layout="@android:layout/list_content" />
<fragment
android:id="@+id/frg_chapter_list"
android:name="eam.droid.pt.entholkaappiyam.FragmentChapterList"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
tools:layout="@android:layout/list_content" />
<FrameLayout
android:id="@+id/fl_chapter_detail"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2" />
</LinearLayout>
activity_section_list.xml:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/frg_section_list"
android:name="eam.droid.pt.entholkaappiyam.FragmentSectionList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
tools:context=".ActivitySectionList"
tools:layout="@android:layout/list_content" />
活动章节列表.xml:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/frg_chapter_list"
android:name="eam.droid.pt.entholkaappiyam.FragmentChapterList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
tools:context=".ActivityChapterList"
tools:layout="@android:layout/list_content" />
activity_chapter_detail.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/fl_chapter_detail"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ActivityChapterDetail"
tools:ignore="MergeRootFrame" />
Java 代码如下所示:
ActivitySectionList.java
public class ActivitySectionList extends FragmentActivity implements FragmentSectionList.Callbacks
FragmentSectionList.java
public class FragmentSectionList extends ListFragment
ActivityChapterList.java
public class ActivityChapterList extends FragmentActivity implements FragmentChapterList.Callbacks
片段章节列表.java
public class FragmentChapterList extends ListFragment
ActivityChapterDetail.java
public class ActivityChapterDetail extends FragmentActivity
FragmentChapterDetail.java
public class FragmentChapterDetail extends Fragment
但是应用程序因 Inflate Exception 和 IllegalStateException 而崩溃。我正在尝试过去两天,但无法找出问题所在。如果有人对此有想法,请回复。
我注意到的一件事是它在手机上运行良好,它将单个片段用于整个屏幕。但在试图在屏幕上放置三个片段的平板电脑上崩溃。当我调试时,我知道 FragmentChapterList.java 的 OnAttach 在 ActivityChapterList.java 的 onCreate 之前被调用。这就是为什么,它给出了 IllegaltStateException: Activity 必须实现片段的回调。因此,我尝试在 ActivitySectionList.java 中实现这两个片段回调。
像这样:
public class ActivitySectionList extends FragmentActivity implements FragmentSectionList.Callbacks, FragmentChapterList.Callbacks
然后它在平板电脑上运行良好。但是,无法在手机上检索章节列表。
这是我的日志:
02-12 14:14:55.858: E/AndroidRuntime(989): FATAL EXCEPTION: main
02-12 14:14:55.858: E/AndroidRuntime(989): java.lang.RuntimeException: Unable to start activity ComponentInfo{eam.droid.pt.entholkaappiyam/eam.droid.pt.entholkaappiyam.ActivitySectionList}: android.view.InflateException: Binary XML file line #20: Error inflating class fragment
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.ActivityThread.access$600(ActivityThread.java:130)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.os.Handler.dispatchMessage(Handler.java:99)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.os.Looper.loop(Looper.java:137)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.ActivityThread.main(ActivityThread.java:4745)
02-12 14:14:55.858: E/AndroidRuntime(989): at java.lang.reflect.Method.invokeNative(Native Method)
02-12 14:14:55.858: E/AndroidRuntime(989): at java.lang.reflect.Method.invoke(Method.java:511)
02-12 14:14:55.858: E/AndroidRuntime(989): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
02-12 14:14:55.858: E/AndroidRuntime(989): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-12 14:14:55.858: E/AndroidRuntime(989): at dalvik.system.NativeStart.main(Native Method)
02-12 14:14:55.858: E/AndroidRuntime(989): Caused by: android.view.InflateException: Binary XML file line #20: Error inflating class fragment
02-12 14:14:55.858: E/AndroidRuntime(989): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
02-12 14:14:55.858: E/AndroidRuntime(989): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:256)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.Activity.setContentView(Activity.java:1867)
02-12 14:14:55.858: E/AndroidRuntime(989): at eam.droid.pt.entholkaappiyam.ActivitySectionList.onCreate(ActivitySectionList.java:20)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.Activity.performCreate(Activity.java:5008)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
02-12 14:14:55.858: E/AndroidRuntime(989): ... 11 more
02-12 14:14:55.858: E/AndroidRuntime(989): Caused by: java.lang.IllegalStateException: Activity must implement fragment's callbacks.
02-12 14:14:55.858: E/AndroidRuntime(989): at eam.droid.pt.entholkaappiyam.FragmentChapterList.onAttach(FragmentChapterList.java:84)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:867)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1066)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1168)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:280)
02-12 14:14:55.858: E/AndroidRuntime(989): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
谁能告诉我我哪里可能出错了?如果有人遇到 3 个垂直面板(2 个列表和 1 个细节)的教程或示例,请指点我。
这是详细的场景: