本地扫描音乐文件

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public class ScannerActivity extends Activity {

private ListView mlistview;

ArrayList list = new ArrayList();

private MyAdapter myAdapter;

private MyReceiver myReceiver;

private ProgressBar progressbar;

private MyApplication myApplication;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_scanner);

myApplication = (MyApplication) getApplication();

myApplication.addActity(this);

progressbar = (ProgressBar) findViewById(R.id.scanner_progressbar);

mlistview = (ListView) findViewById(R.id.listView1);

myAdapter = new MyAdapter();

mlistview.setAdapter(myAdapter);

}

public void btnScanner(View v) {

Intent intent = new Intent(Intent.ACTION_MEDIA_MOUNTED);

Uri uri = Uri.parse("file://" + Environment.getExternalStorageDirectory().getAbsolutePath());

intent.setData(uri);

sendBroadcast(intent);

}

private void scannerMusic() {

list.clear();

ContentResolver contentResolver = getContentResolver();

Cursor cursor = contentResolver.query(Media.EXTERNAL_CONTENT_URI, null, null, null, null);

boolean first = cursor.moveToFirst();

while (first) {

String singer = cursor.getString(cursor.getColumnIndex(Media.ARTIST));

String musicname = cursor.getString(cursor.getColumnIndex(Media.DISPLAY_NAME));

String musicurl = cursor.getString(cursor.getColumnIndex(Media.DATA));

int musiclen = cursor.getInt(cursor.getColumnIndex(Media.DURATION));

list.add(new MusicInfo(singer, musicname, musiclen, musicurl, null));

first = cursor.moveToNext();

}

cursor.close();

myAdapter.notifyDataSetChanged();

}

class MyAdapter extends BaseAdapter {

@Override

public int getCount() {

return list.size();

}

@Override

public Object getItem(int position) {

return null;

}

@Override

public long getItemId(int position) {

return 0;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

View inflate = getLayoutInflater().inflate(R.layout.scanner_item, null);

TextView musicname = (TextView) inflate.findViewById(R.id.scanner_musicname);

TextView singer = (TextView) inflate.findViewById(R.id.scanner_singer);

MusicInfo musicInfo = list.get(position);

musicname.setText(musicInfo.getMusicName());

singer.setText(musicInfo.getSinger());

return inflate;

}

}

@Override

protected void onStart() {

myReceiver = new MyReceiver();

IntentFilter filter = new IntentFilter();

filter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED);

filter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);

filter.addDataScheme("file");

registerReceiver(myReceiver, filter);

super.onStart();

}

@Override

protected void onStop() {

unregisterReceiver(myReceiver);

super.onStop();

}

@Override

protected void onDestroy()

{

myApplication.removeActivity(this);

super.onDestroy();

}

class MyReceiver extends BroadcastReceiver {

@Override

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

switch (action) {

case Intent.ACTION_MEDIA_SCANNER_STARTED:

Toast.makeText(ScannerActivity.this, "开始扫描", Toast.LENGTH_SHORT).show();

break;

case Intent.ACTION_MEDIA_SCANNER_FINISHED:

Toast.makeText(ScannerActivity.this, "结束扫描", Toast.LENGTH_SHORT).show();

mlistview.setVisibility(View.VISIBLE);

scannerMusic();

progressbar.setVisibility(View.GONE);

break;

default:

break;

}

}

}

}

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