使用 viewPager 的 Android youtube api

Question

我是新手，我正在尝试使用 youtube api fragment 显示 youtube 视频。 我已经搜索并试图找到这个问题，但找不到正确的答案。 所以，我想使用 viewpager 向他展示 youtube 视频。在 youtube 的第一个寻呼机上，另一个是图像寻呼机。所以我尝试在 fragment 上实现 youtube api。 我得到了这个错误。

这是我的java代码:

public class VideoFragment extends YouTubePlayerSupportFragment {

YouTubePlayerView youTubeView; 
String URL_VIDEO = "CaA-k1l0xa4";
String KEY_DEVELOPER = "api key";


    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.video_gallery, container, false);


    YouTubePlayerSupportFragment youTubePlayerSupportFragment = (YouTubePlayerSupportFragment) getFragmentManager().findFragmentById(R.id.youtubeplayerfragment);

    youTubePlayerSupportFragment.initialize(KEY_DEVELOPER, new OnInitializedListener() {

        @Override
        public void onInitializationSuccess(Provider arg0, YouTubePlayer arg1,
                boolean arg2) {
            // TODO Auto-generated method stub
            arg1.cueVideo(URL_VIDEO);
        }

        @Override
        public void onInitializationFailure(Provider arg0,
                YouTubeInitializationResult arg1) {
            // TODO Auto-generated method stub

        }
    });
}

这是我的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<fragment
android:name="com.google.android.youtube.player.YouTubePlayerSupportFragment"
android:id="@+id/youtubeplayerfragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>    

</LinearLayout>

这是我的日志猫:

07-21 03:57:32.042: E/AndroidRuntime(27582): FATAL EXCEPTION: main
07-21 03:57:32.042: E/AndroidRuntime(27582): Process: com.indomultimedia.hellobali, PID: 27582
07-21 03:57:32.042: E/AndroidRuntime(27582): java.lang.NullPointerException
07-21 03:57:32.042: E/AndroidRuntime(27582):    at com.google.android.youtube.player.YouTubePlayerSupportFragment.onStart(Unknown Source)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.app.Fragment.performStart(Fragment.java:1332)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:906)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1080)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:622)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1416)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:431)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:139)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.view.ViewPager.populate(ViewPager.java:804)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1016)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.View.measure(View.java:17357)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5352)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.View.measure(View.java:17357)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1751)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.ScrollView.onMeasure(ScrollView.java:468)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.View.measure(View.java:17357)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5352)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.View.measure(View.java:17357)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5352)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:38 2)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.View.measure(View.java:17357)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5352)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2505)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at  android.view.View.measure(View.java:17357)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2175)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1316)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at     android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1513)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1200)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6388)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:803)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.Choreographer.doCallbacks(Choreographer.java:603)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.Choreographer.doFrame(Choreographer.java:573)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:789)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.os.Handler.handleCallback(Handler.java:733)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.os.Handler.dispatchMessage(Handler.java:95)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.os.Looper.loop(Looper.java:157)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at android.app.ActivityThread.main(ActivityThread.java:5293)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at java.lang.reflect.Method.invokeNative(Native Method)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at java.lang.reflect.Method.invoke(Method.java:515)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
07-21 03:57:32.042: E/AndroidRuntime(27582):    at     dalvik.system.NativeStart.main(Native Method)

谁能帮我解决这个错误？

Answer 1

在调用初始化之前，首先通过以下方式创建 YouTubePlayerSupportFragment

YouTubePlayerSupportFragment youTubeFragment =
                new YouTubePlayerSupportFragment().newInstance();

然后提交

FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.add(R.id.youtube_fragment, youTubeFragment).commit();

我看到一些示例使用 getActivity().getSupportFragmentManager() 而不是 getChildFragmentManager()。不确定哪个更正确。