Android 使用Gallery实现图片“多级联动”

核心提示：1: public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener {2:3: private Gallery album;4:5: private Gallery audio;6:7: private

1: public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener {

2:

3: private Gallery album;

4:

5: private Gallery audio;

6:

7: private AlbumAdapter albumAdapter;

8:

9: private AudioAdapter audioAdapter;

10:

11: @Override

12: protected void onCreate(Bundle savedInstanceState) {

13: super.onCreate(savedInstanceState);

14: setContentView(R.layout.audio_player);

15: setupViews();

16: }

17:

18: // 个人习惯

19: private void setupViews() {

20: album = (Gallery) findViewById(R.id.gallery);

21: audio = (Gallery) findViewById(R.id.gallery2);

22:

23: albumAdapter = new AlbumAdapter(this);

24:

25: album.setAdapter(albumAdapter);

26:

27: int aid = (int) albumAdapter.getItemId(0);

28:

29: audioAdapter = new AudioAdapter(this, aid);

30: audio.setAdapter(audioAdapter);

31:

32: audio.setOnItemSelectedListener(this);

33: album.setOnItemSelectedListener(this);

34: }

35:

36: public void onItemSelected(AdapterView parent, View view, int position, long id) {

37: if (parent == album) {

38: // 专辑被选中

39: int aid = (int) albumAdapter.getItemId(position);

40: // 更新歌曲Gallery

41: audioAdapter.notifyDataSetChanged(aid);

42: } else if (parent == audio) {

43: // TODO do something

44: }

45:

46: }

47:

48: public void onNothingSelected(AdapterView parent) {

49:

50: }