@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_detecting); story1 = (ImageView) findViewById(R.id.story_1); head = (TextView) findViewById(R.id.story_head); storyBack = (ImageView) findViewById(R.id.story_back); storyBack.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub Intent it = new Intent(Detecting.this, AppStart.class); startActivity(it); Log.v("detectActivity", "back"); Detecting.this.finish(); } }); skip = (Button) findViewById(R.id.story_skip); skip.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if (index != ImageInt.length) index = ImageInt.length; } }); imgList = AppUtil.getImg1(); story1.setImageResource(imgList.get(index)); mp3 = MediaPlayer.create(this, MusicInt[index++]); mp3.start(); mp3.setOnCompletionListener(new myMusicListener()); }