Android – 挣扎与Youtube播放器支持片段

概述我试图在片段中使用Youtube播放器支持片段,但是应用程序总是崩溃(NullPointerException),我还没有找到任何类似的文章来解决它. 我有导入导入android.support.v4.app.Fragment,所以不应该是问题. 这是我的片段类如下所示： package com.example.activitydetector;import com.google.android 我试图在片段中使用Youtube播放器支持片段,但是应用程序总是崩溃(NullPointerException),我还没有找到任何类似的文章来解决它.

我有导入导入android.support.v4.app.Fragment,所以不应该是问题.

这是我的片段类如下所示：

package com.example.activitydetector;import com.Google.androID.youtube.player.YouTubeBaseActivity;import com.Google.androID.youtube.player.YouTubeInitializationResult;import com.Google.androID.youtube.player.YouTubePlayer;import com.Google.androID.youtube.player.YouTubePlayer.OnInitializedListener;import com.Google.androID.youtube.player.YouTubePlayer.ProvIDer;import com.Google.androID.youtube.player.YouTubePlayerFragment;import com.Google.androID.youtube.player.YouTubePlayerSupportFragment;import com.Google.androID.youtube.player.YouTubePlayerVIEw;import systemManager.SystemManager;import androID.app.Activity;import androID.bluetooth.BluetoothAdapter;import androID.os.Bundle;import androID.support.v4.app.Fragment;import androID.util.Log;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEw.OnClickListener;import androID.vIEw.VIEwGroup;import androID.Widget.button;import androID.Widget.linearLayout;import androID.Widget.Toast;public class GuIDelinesFragment extends YouTubePlayerSupportFragment {    SystemManager sm;    YouTubePlayerVIEw youTubeVIEw;     String URL_VIDEO = "CaA-k1l0xa4";    String KEY_DEVELOPER = "AIzaSyBIIS0u0NXhsZguv8nCNvSzUmflTt7K1Ek";    public GuIDelinesFragment() {        super();        // Todo auto-generated constructor stub    }    public voID onCreate(Bundle savedInstanceState) {        // Todo auto-generated method stub        super.onCreate(savedInstanceState);    }    public VIEw onCreateVIEw(LayoutInflater inflater,VIEwGroup container,Bundle savedInstanceState) {        VIEw vIEw = inflater.inflate(R.layout.youtube,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            }        });        return vIEw;    }}

这是我完全简单的“Youtube”布局：

<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"tools:context=".MainActivity" ><fragment    androID:name="com.Google.androID.youtube.player.YouTubePlayerSupportFragment"    androID:ID="@+ID/youtubeplayerfragment"    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"/>

这是日志显示的错误：

11-30 16:33:56.419: W/dalvikvm(19375): threadID=1: thread exiting with uncaught exception (group=0x40f14258)11-30 16:33:56.423: E/AndroIDRuntime(19375): FATAL EXCEPTION: main11-30 16:33:56.423: E/AndroIDRuntime(19375): java.lang.NullPointerException11-30 16:33:56.423: E/AndroIDRuntime(19375):    at com.Google.androID.youtube.player.YouTubePlayerSupportFragment.onStart(UnkNown Source)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.support.v4.app.Fragment.performStart(Fragment.java:1484)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.support.v4.app.FragmentManagerImpl.movetoState(FragmentManager.java:941)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.support.v4.app.FragmentManagerImpl.movetoState(FragmentManager.java:1088)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.support.v4.app.FragmentManagerImpl.run(FragmentManager.java:429)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.os.Handler.handleCallback(Handler.java:605)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.os.Handler.dispatchMessage(Handler.java:92)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.os.Looper.loop(Looper.java:137)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at androID.app.ActivityThread.main(ActivityThread.java:4645)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at java.lang.reflect.Method.invokeNative(Native Method)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at java.lang.reflect.Method.invoke(Method.java:511)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:576)11-30 16:33:56.423: E/AndroIDRuntime(19375):    at dalvik.system.NativeStart.main(Native Method)

任何帮助或提示都将非常感激.我已经浪费了大约4个小时,没有运气.

解决方法 我以前碰到过这个问题,我相信这个问题源于试图夸大YouTubePlayerSupportFragment布局.我通过创建如下的片段来解决我的问题：

public class PlayerYouTubeFrag extends YouTubePlayerSupportFragment {    private String currentVIDeoID = "vIDeo_ID";    private YouTubePlayer activePlayer;    public static PlayerYouTubeFrag newInstance(String url) {    PlayerYouTubeFrag playerYouTubeFrag = new PlayerYouTubeFrag();        Bundle bundle = new Bundle();        bundle.putString("url",url);        playerYouTubeFrag.setArguments(bundle);        return playerYouTubeFrag;    }    private voID init() {        initialize(DeveloperKey.DEVELOPER_KEY,new OnInitializedListener() {            @OverrIDe            public voID onInitializationFailure(ProvIDer arg0,YouTubeInitializationResult arg1) { }            @OverrIDe            public voID onInitializationSuccess(YouTubePlayer.ProvIDer provIDer,YouTubePlayer player,boolean wasRestored) {                activePlayer = player;                activePlayer.setPlayerStyle(YouTubePlayer.PlayerStyle.DEFAulT);                if (!wasRestored) {                    activePlayer.loadVIDeo(getArguments().getString("url"),0);                }            }        });    }    @OverrIDe    public voID onYouTubeVIDeoPaused() {        activePlayer.pause();    }}

然后调用片段的实例,如下所示：

PlayerYouTubeFrag myFragment = PlayerYouTubeFrag.newInstance("vIDeo_ID");getSupportFragmentManager().beginTransaction().replace(R.ID.vIDeo_container,myFragment).commit();

在我的情况下,vIDeo_container是一个空的框架布局.

总结

以上是内存溢出为你收集整理的Android – 挣扎与Youtube播放器支持片段全部内容，希望文章能够帮你解决Android – 挣扎与Youtube播放器支持片段所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。