的ClassNotFoundException：android.view.fragment裝載機Youtubeplayer片段

Question

我使用SherlockFragmentActivity作爲我AbstractBaseActivity，對設備與API level 10或降低我得到以下奇怪的例外是從Play商店中崩潰堆棧跟蹤reprots

java.lang.RuntimeException: Unable to start activity 

ComponentInfo{somepackage/somepackage.PlayerActivity}: android.view.InflateException: Binary XML file line #15: Error inflating class fragment 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1659) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675) 
at android.app.ActivityThread.access$1500(ActivityThread.java:121) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:123) 
at android.app.ActivityThread.main(ActivityThread.java:3701) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:507) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) 
at dalvik.system.NativeStart.main(Native Method) 
Caused by: android.view.InflateException: Binary XML file line #15: Error inflating class fragment 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:623) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:408) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
at com.toxic.apps.doordarshan.AbstractBaseActivity.initContainerLayout(AbstractBaseActivity.java:133) 
at com.toxic.apps.doordarshan.AbstractBaseActivity.setContentView(AbstractBaseActivity.java:108) 
at somepackage.PlayerActivity.onCreate(PlayerActivity.java:37) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623) 
... 11 more 
Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader[/data/app/somepackage.apk] 
at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
at android.view.LayoutInflater.createView(LayoutInflater.java:471) 
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:549) 
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568) 
... 19 more 

我PlayerActivity類

public class PlayerActivity extends AbstractBaseActivity implements YouTubePlayer.OnInitializedListener { 


private YouTubePlayerFragment myYouTubePlayerFragment; 

@Override 
protected void initViewControls() { 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.activity_player); 

    VIDEO_ID = getIntent().getStringExtra("EPISODE_ID"); 

    myYouTubePlayerFragment = (YouTubePlayerFragment) getFragmentManager().findFragmentById(R.id.youtubeplayerfragment); 
    myYouTubePlayerFragment.initialize(API_KEY, this); 
} 
    ...... 
} 

和下面是activity_player

<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:orientation="vertical" > 
    <fragment // crash on this line 
     android:id="@+id/youtubeplayerfragment" 
     android:name="com.google.android.youtube.player.YouTubePlayerFragment" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" /> 

</LinearLayout> 

Answer 1

android.app.Fragment僅在Android 3.0（API 11）中引入。如果您希望支持低於API 11的設備，則需要使用YouTubePlayerSupportFragment和getSupportFragmentManager()。