Java – Symbol not parsed error in activity file

I’m trying to list all music files on an SD card using a ListView. In the Java code of the activity, an error occurred,
This is the method I use inside the class:

 private void init_phone_music_grid() {
    System.gc();
    String[] proj = { MediaStore.Audio.Media._ID,
            MediaStore.Audio.Media.DATA,
            MediaStore.Audio.Media.DISPLAY_NAME,
            MediaStore.Video.Media.SIZE };
    musiccursor = 
managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
            proj, null, null, null);
    count = musiccursor.getCount();
    musiclist = (ListView)findViewById(R.id.sample);
    musiclist.setAdapter(new MusicAdapter(getApplicationContext()));

musiclist.setOnItemClickListener(musicgridlistener);
    mMediaPlayer = new MediaPlayer();
}

Now here are the simple troubles

musiclist = (ListView)findViewById(R.id.sample);

Android Studio says it can’t parse the symbol sample.

But how is this possible when I define it explicitly in XML? This is the XML code:

<?xml version="1.0" encoding="utf-8"?>

< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
< ListView
    android:id="@+id/sample"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"/>
</LinearLayout>

Looking for a solution!

Not sure if it will fix the problem, but your xml is malformed.

There

should not be any space signatures after <:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
    android:id="@+id/sample"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"/>