Im trying to use the Youtube Player Support Fragment in a fragment but the app always crash (NullPointerException) and I have not been able to find any similar post to fix it.
I have import import android.support.v4.app.Fragment so that should not be the problem.
This is how my fragment class looks like:
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;
}
}
This is my totally and simple "Youtube" layout:
<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"/>
And this is the error that the log shows:
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: main
11-30 16:33:56.423: E/AndroidRuntime(19375): java.lang.NullPointerException
11-30 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$1.run(FragmentManager.java:429)
11-30 16:33:56.423: E/AndroidRuntime(19375): at android.os.Handler.handleCallback(Handler.java:605)
11-30 16:33:56.423: E/AndroidRuntime(19375): at android.os.Handler.dispatchMessage(Handler.java:92)
11-30 16:33:56.423: E/AndroidRuntime(19375): at android.os.Looper.loop(Looper.java:137)
11-30 16:33:56.423: E/AndroidRuntime(19375): at android.app.ActivityThread.main(ActivityThread.java:4645)
11-30 16:33:56.423: E/AndroidRuntime(19375): at java.lang.reflect.Method.invokeNative(Native Method)
11-30 16:33:56.423: E/AndroidRuntime(19375): at java.lang.reflect.Method.invoke(Method.java:511)
11-30 16:33:56.423: E/AndroidRuntime(19375): at com.android.internal.os.ZygoteInit$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)
ANY help or hint would be deeply grateful. I have already wasted around 4 hours without luck.
CzarMatt
I ran into this problem before and I believe the issue stemmed from trying to inflate the YouTubePlayerSupportFragment layout. I solved my issue by creating a fragment like this:
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();
}
}
And then call an instance of the fragment like this:
PlayerYouTubeFrag myFragment = PlayerYouTubeFrag.newInstance("video_id");
getSupportFragmentManager().beginTransaction().replace(R.id.video_container, myFragment).commit();
Where video_container in my case was an empty frame layout.
Silmarilos
CzarMatt nailed it. Just to add to his answer though, don't forget you need to call the init() method. To do so follow CzarMatt's code and add one line:
public static PlayerYouTubeFrag newInstance(String url) {
PlayerYouTubeFrag playerYouTubeFrag = new PlayerYouTubeFrag();
Bundle bundle = new Bundle();
bundle.putString("url", url);
playerYouTubeFrag.setArguments(bundle);
playerYouTubeFrag.init(); //This line right here
return playerYouTubeFrag;
}
Also, since I'm sure people will run into the same issue I did, even though CzarMatt mentioned it above, just to reiterate, when you pass in a URL for the video, you are NOT passing in the youtube URL
That is, with: "youtube.com/watch?v=z7PYqhABiSo&feature=youtu.be"
You are passing in only the video ID
I.e. use: "z7PYqhABiSo"
Since it is Google's own documentation, it knows how to play it just fine with the id.
来源：https://stackoverflow.com/questions/20302110/struggling-with-youtube-player-support-fragment