相关疑难解决方法(0)

我试图在片段中使用Youtube播放器支持片段,但应用程序总是崩溃(NullPointerException),我无法找到任何类似的帖子来修复它.

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

这是我的片段类的样子:

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) { …

我正在使用此处概述的Youtube Android Player API:https://developers.google.com/youtube/android/player/

但是,我不能同时在我的活动中获得多个视频.我尝试将两个YouTubePlayerViews放入活动中,如下所示:

activity_main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >

    <com.google.android.youtube.player.YouTubePlayerView
        android:id="@+id/view_one"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <com.google.android.youtube.player.YouTubePlayerView
        android:id="@+id/view_two"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

MainActivity.java

package com.example.multidemo;

import android.os.Bundle;

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.Provider;
import com.google.android.youtube.player.YouTubePlayerView;

public class MainActivity extends YouTubeBaseActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ((YouTubePlayerView) findViewById(R.id.view_one)).initialize("API key", new YouTubePlayer.OnInitializedListener() {
            @Override
            public void onInitializationSuccess(Provider arg0, YouTubePlayer arg1, boolean arg2) {
                arg1.cueVideo("RpwoN_XlN6Y");
            }

            @Override
            public void …