小编IAm*_*ade的帖子

public class PhrasesActivity extends AppCompatActivity {
    MediaPlayer mediaPlayer;
    private MediaPlayer.OnCompletionListener onCompletionListener = new MediaPlayer.OnCompletionListener(){
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {
            releaseMediaPlayer();
        }
    };

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

        final ArrayList<Word> words = new ArrayList<Word>();

#some Word elements added
        WordAdapter wordAdapter = new WordAdapter(this, words, R.color.category_phrases);
        ListView listView = (ListView)findViewById(R.id.numberlist);
        listView.setAdapter(wordAdapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(PhrasesActivity.this, "Demo", Toast.LENGTH_SHORT).show();
                Word word = words.get(i);
                releaseMediaPlayer();
                mediaPlayer = MediaPlayer.create(PhrasesActivity.this, word.getAudioResourceID());
                mediaPlayer.start(); …