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当我打算获取 arrayList 的数据时,如何在第二个活动和 setText 和 Image 中获取这些数据?

[英]When I intent the arrayList's data, and how can I get those data in the second activity and setText and Image?

我使用 ArrayList 制作了一个歌曲列表,我得到了所有信息,可以将其传递给第二个活动并在新页面上打开它。 我想要的是当我单击歌曲列表时,它会在新页面中打开,新页面显示歌曲的详细信息和图像。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    listView_Main=findViewById(R.id.listView_Main);

    final Song song1 = new Song("Love Story","Taylor Swift","September 12,2008", "$1.29");
    Song song2 = new Song("Lover","Taylor Swift","August 23,2019", "$1.29" );
    Song song3 = new Song("I Forgot That You Existed", "Taylor Swift", "August 23,2019", "$1.29");
    Song song4 = new Song("The Archer", "Taylor Swift", "August 23,2019", "$1.29");
    Song song5 = new Song("I Think He Knows","Taylor Swift", "August 23,2019", "$1.29");

    final List<Song> songs = new ArrayList<>();
    songs.add(song1);
    songs.add(song2);
    songs.add(song3);
    songs.add(song4);
    songs.add(song5);

      MainAdapter adapter = new MainAdapter(this, songs);
      listView_Main.setAdapter(adapter);

     listView_Main.setOnItemClickListener(new AdapterView.OnItemClickListener() {
         @Override
         public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

             Intent intent=new Intent(view.getContext(),SongDetailActivity.class);
             intent.putExtra("currentSong",(Serializable) songs.get(i));
             startActivity(intent);
         }
     });
}

但我的问题是在第二个活动中,我不知道如何使用 setText 获取歌曲的细节和图像。 因此,我在 String.xml 文件中制作了歌曲的详细信息。 如何在第二个活动中获取这些详细信息和图像? 另外,我不知道如何获得第二个活动中歌曲列表的position,我的意思是我点击了哪首歌的position,它显示了我点击的那首歌的详细信息。

//这里是歌曲详情的第二个活动。//////

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_song_detail);

    textViewSongDetail=findViewById(R.id.textView_SongDetail);
    imageViewSongDetail=findViewById(R.id.image_SongDetail);

    Song currentSong=(Song)getIntent().getSerializableExtra("currentSong");
}

首先确保您已经在 model class Song 中实现了 Serializable。 比您的代码可以正常工作。 要接收 position,您可以发送 -

intent.putExtra("position", i);   // to send 

getIntent().getIntExtra("position", -1);  //to receive (-1 is default value)

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