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我有listview,其中包含带播放按钮和搜索栏的音频文件列表.我使用基本适配器显示了列表视图.
当我单击列表视图的播放按钮时,我想播放音频文件.我成功地实现了这个,但是当我点击列表中的另一个播放按钮时,两个音频文件正在连续播放,它将继续播放所有播放按钮.如何限制媒体播放器在一个位置播放,如果我点击另一个图标,则必须停止旧媒体播放器并开始播放新媒体播放器.谁能说我怎么实现这个呢？
嗨,我正在使用此代码
public class PlayerList extends Activity {
private static final String TAG = "log";
ListView listV;
ArrayList<HashMap<String, String>> arrList = new ArrayList<HashMap<String,String>>();;
String[] strArray = { "/mnt/sdcard/Nal.mp3", "/mnt/sdcard/Nal2.mp3",
"/mnt/sdcard/Nal3.mp3", "/mnt/sdcard/sample1.mp3", };
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.homepage);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
listV = (ListView) findViewById(R.id.HomePagelistView1);
for (int i = 0; i < strArray.length; i ) {
HashMap<String, String> hmap = new HashMap<String, String>();
hmap.put("title", "File Name");
hmap.put("description", "File description");
hmap.put("url", strArray[i]);
arrList.add(hmap);
}
FileListAdapter sAdapter = new FileListAdapter(arrList, PlayerList.this);
listV.setAdapter(sAdapter);
}
}
FileListAdapter文件如下所示
public class FileListAdapter extends BaseAdapter implements
OnCompletionListener, OnSeekBarChangeListener {
private MediaPlayer mp;
private Handler mHandler = new Handler();;
private Utilities utils;
SeekBar seekBar;// = (SeekBar) findViewById(R.id.homeList_seekBar1);
String songPath = "";
// ImageView imageVPlay;
private ArrayList<HashMap<String, String>> data;
private LayoutInflater inflater = null;
public FileListAdapter(ArrayList<HashMap<String, String>> data,
Context context) {
this.data = data;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView,
ViewGroup parent) {
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.homelist, parent, false);
final ImageView imageVDownload = (ImageView) vi
.findViewById(R.id.homeListimageDownload); // download
final ImageView imageVPlay = (ImageView) vi
.findViewById(R.id.homeListimagePlay); // play
final TextView textVTitle = (TextView) vi
.findViewById(R.id.homeListTextTitle); // email ID
final TextView textVDescription = (TextView) vi
.findViewById(R.id.homeListTextDesc); // email ID
seekBar = (SeekBar) vi.findViewById(R.id.homeList_seekBar1);
textVTitle.setText(data.get(position).get("title"));
textVDescription.setText(data.get(position).get("description"));
// /////////////////////////////////// set image tick and download
String loadFilePath = data.get(position).get("url");
// String loadFileName = data.get(position).get("title");
File ffPath = new File(loadFilePath);
String loadfileNameWithExt = ffPath.getName();
Log.i(TAG, "load file and name path " " " loadfileNameWithExt
" " loadFilePath);
imageVPlay.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String selectFilePath = data.get(position).get("url");
String selectFileName = data.get(position).get("title");
Log.i(TAG, "selected file and name path " selectFileName
" " selectFilePath);
songPath = selectFilePath;
mediaplayerMethod(selectFilePath);
imageVPlay.setImageResource(R.drawable.list_pause);
textVTitle.setVisibility(View.INVISIBLE);
textVDescription.setVisibility(View.INVISIBLE);
seekBar.setVisibility(View.VISIBLE);
}
});
return vi;
}
protected void mediaplayerMethod(String filepath) {
Log.d(TAG, "mediaplayerMethod audio file path " filepath);
mp = new MediaPlayer();
mp.setOnCompletionListener(FileListAdapter.this); // Important
seekBar.setOnSeekBarChangeListener(FileListAdapter.this);
utils = new Utilities();
playSong(filepath);
}
private void playSong(final String fileptath) {
final Handler handler = new Handler() {
@Override
public void handleMessage(Message message) {
String xmlString = (String) message.obj;
Log.d(TAG, "handleMessage ");
try {
// mp.prepare();
mp.start();
seekBar.setProgress(0);
seekBar.setMax(100);
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
};
Thread thread = new Thread() {
@Override
public void run() {
Log.d(TAG, "run ");
try {
mp.reset();
mp.setDataSource(fileptath);
Log.i(TAG, "internal file");
mp.prepare();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Message message = handler.obtainMessage(1, "");
handler.sendMessage(message);
}
};
thread.start();
}
public void updateProgressBar() {
mHandler.postDelayed(mUpdateTimeTask, 100);
}
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
try {
long totalDuration = mp.getDuration();
long currentDuration = mp.getCurrentPosition();
int progress = (int) (utils.getProgressPercentage(
currentDuration, totalDuration));
seekBar.setProgress(progress);
try {
double progVal = (progress / 100.0) * (360.0);
int progInt = (int) Math.ceil(progVal);
} catch (NumberFormatException e) {
Log.e(TAG, "NumberFormatException " e);
}
// Running this thread after 100 milliseconds
mHandler.postDelayed(this, 100);
} catch (IllegalStateException e) {
Log.e(TAG, "IllegalStateException " e);
}
}
};
@Override
public void onCompletion(MediaPlayer mp) {
mp.stop();
mp.release();
}
@Override
public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
mHandler.removeCallbacks(mUpdateTimeTask);
}
@Override
public void onStopTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
mHandler.removeCallbacks(mUpdateTimeTask);
int totalDuration = mp.getDuration();
int currentPosition = utils.progressToTimer(seekBar.getProgress(),
totalDuration);
// forward or backward to certain seconds
mp.seekTo(currentPosition);
updateProgressBar();
}
}// FileListAdapter
解决方法: 您可以使用此代码,因为它为我工作：
public class soundTest extends Activity {
private ListView lv1;
private String lv_arr[]={"test 1","test 2","test 3","test 4","test 5"};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
lv1.setAdapter(new ArrayAdapter<String>(this,R.layout.list_item, lv_arr));
lv1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
if (lv1.getItemAtPosition(position)=="test 1") {
MediaPlayer mp = MediaPlayer.create(getApplicationContext(),R.raw.sound1);
mp.start();
mp.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
}
if (lv1.getItemAtPosition(position)=="test 2") {
MediaPlayer mp = MediaPlayer.create(getApplicationContext(),R.raw.sound2);
mp.start();
mp.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
}
//And the rest of the sounds 3,4,5.
}
});
}
}
全局变量MediaPlayer需要设置为private static.这引起了我好几次.
如果您发现任何问题,请回复. 来源：https://www./content-4-279151.html
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