我在列表视图中有两个选项(第1部分和第2部分)。我希望他们每个人都能播放不同的视频。 (来自Youtube,即)。我怎么做? IF声明还是有另一种方式?这是Mainactivity2。
public class Main2Activity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
final String[] sublectures = {"Part 1","Part 2"};
ListAdapter appadapter1 = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, sublectures);
ListView list2 = findViewById(R.id.list2);
list2.setAdapter(appadapter1);
list2.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String lecture = String.valueOf(parent.getItemAtPosition(position));
Intent startintent = new Intent(getApplicationContext(),Main3Activity.class);
startActivity(startintent);
}
});
}}
这取决于Mainactivity 3
public class Main3Activity extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener {
public static final String API_KEY = "<key here>";
public static final String VIDEO_ID = "W2TYS_Jvzjc";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main3);
YouTubePlayerView youTubePlayerView = findViewById(R.id.youtubePlayerView);
youTubePlayerView.initialize(API_KEY, this);
}
@Override
public void onInitializationFailure (YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult){
Toast.makeText(this, "Fail to Load", Toast.LENGTH_LONG).show();
}
@Override
public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer player, boolean wasRestored) {
if (!wasRestored) {
player.setPlayerStyle(YouTubePlayer.PlayerStyle.DEFAULT);
player.cueVideo(VIDEO_ID);
}
}
}
而不是sublectures
是一个字符串数组,创建一个名为Sublecture
的自定义类。此类存储讲座的名称(第1部分或第2部分)以及相应YouTube视频的URL。 Sublecture实际上只是一类吸气剂和二传手。然后,而不是ArrayAdapter<String>
,创建一个自定义ArrayAdapter <Sublecture>
。看这里:
How to use ArrayAdapter<myClass>
我所描述的实际上是你将在Android中做的最常见的事情之一,所以花点时间学习如何去做。