在ListView中单击项目时读取文本文件-Android

我正在开发一个Android应用程序来列出歌曲。单击任何歌曲（ListView中的项目）时，其歌词（应显示文本文件）。当我单击ListView项目时，它会启动新活动，但不显示任何内容。我不确定是什么原因造成的。是因为我没有传递包或正确使用包吗？问题是它无法传递if语句（在第二个活动中）来读取txt文件。非常感谢您的帮助

提前谢谢。这是密码

第一项活动

        public class ListOfSongs extends Activity {

        private ListView songsListView;
        private ArrayAdapter<String> listAdapter;

        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_list_of_songs);
            final String SONG_ONE = "songOne";
            final String SONG_TWO = "songTwo";
            // Find the ListView resource.
            songsListView = (ListView) findViewById(R.id.listofsongs);

            // Create and populate a List of songs names.
            final String[] songs = new String[] { "Song1", "Song2", "Song3",
                    "Song4", "Song5", "Song6", "Song7", "Song8" };
            ArrayList<String> songtList = new ArrayList<String>();
            songtList.addAll(Arrays.asList(songs));

            // Create ArrayAdapter using the songs list.
            // Each row in the ListView will be a TextView. The TextView is defined
            // in another file (res/layout/simplerow.xml).
            listAdapter = new ArrayAdapter<String>(this, R.layout.simplerow,
                    songtList);
            // Set the ArrayAdapter as the ListView's adapter.
            songsListView.setAdapter(listAdapter);

            songsListView.setOnItemClickListener(new OnItemClickListener() {
                public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {

                    Intent startReadingTheLyrics = new Intent(ListOfSongs.this,
                            ReadingTheLyrics.class);

                    if (position == 0) {
                        System.out.println("Position zero");
                        startReadingTheLyrics.putExtra("song1", SONG_ONE);
                        startActivity(startReadingTheLyrics);
                    } else if (position == 1) {
                        System.out.println("Position one");
                        startReadingTheLyrics.putExtra("song2", SONG_TWO);
                        startActivity(startReadingTheLyrics);
                    }

                }
            });
        }

活动\u歌曲列表\u.xml

    <RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:background="@android:color/black"
    tools:context=".ListOfSongs" >

  <ListView android:layout_width="fill_parent"   
      android:layout_height="fill_parent" 
      android:textColor="@android:color/white"  
      android:textSize="25sp"
      android:id="@+id/listofsongs">  
    </ListView> 
</RelativeLayout>

simplerow.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/rowTextView" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content"
 android:padding="10dp"
 android:textSize="16sp" >
</TextView>

---

此处的if语句不正确

  Intent intent = getIntent();
        String song1 = intent.getStringExtra("song1");
        String song2 = intent.getStringExtra("song2");
//It's not able to pass the if statement to be able to read the text file
        if (intent.hasExtra(song1)) 

如果执行

intent.getStringExtra（“song1”）

，

song1=“SongOne”

，而这不是intent中可用的密钥，因此

intent.hasExtra（）

返回false，并且if条件不满足。

---

有关意图的更多信息，请参阅此处：

您可以发布您的.xml吗？我刚刚发布了两个xml文件。谢谢你，nikhil.thakkar。问题解决了。

  Intent intent = getIntent();
        String song1 = intent.getStringExtra("song1");
        String song2 = intent.getStringExtra("song2");
//It's not able to pass the if statement to be able to read the text file
        if (intent.hasExtra(song1))