问题
I am getting all audio file list from server to list-view by following code.
public class ServerFileList extends Activity {
URL urlAudio;
ListView mListView;
ProgressDialog pDialog;
private MediaPlayer mp = new MediaPlayer();
private List<String> myList = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.serverfilelist);
mListView = (ListView) findViewById(R.id.listAudio);
new getAudiofromServer().execute();
new downloadAudioFromServer().execute();
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
playSong(urlAudio + myList.get(position));
}
});
}
private void playSong(String songPath) {
try {
mp.reset();
mp.setDataSource(songPath);
mp.prepare();
mp.start();
} catch (IOException e) {
Log.v(getString(R.string.app_name), e.getMessage());
}
}
private class downloadAudioFromServer extends
AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... url) {
int count;
try {
URL url1 = new URL("http://i-qualtech.com/Fidol/uploadAudio");
URLConnection conexion = url1.openConnection();
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
InputStream input = new BufferedInputStream(url1.openStream());
OutputStream output = new FileOutputStream(
Environment.getExternalStorageDirectory() + "/Sounds/");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
publishProgress((int) (total * 100 / lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {
}
return null;
}
}
class getAudiofromServer extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ServerFileList.this);
pDialog.setMessage("Getting File list from server, Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@SuppressWarnings("unchecked")
@Override
protected String doInBackground(String... arg0) {
try {
urlAudio = new URL("http://i-qualtech.com/Fidol/uploadAudio");
} catch (MalformedURLException e) {
e.printStackTrace();
}
ApacheURLLister lister1 = new ApacheURLLister();
try {
myList = lister1.listAll(urlAudio);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
if (pDialog.isShowing()) {
pDialog.dismiss();
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
ServerFileList.this, android.R.layout.simple_list_item_1,
myList);
adapter.notifyDataSetChanged();
mListView.setAdapter(adapter);
mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
mListView.setCacheColorHint(Color.TRANSPARENT);
}
}
}
And the output is
Now i want to play that audio file by clicking list-view for that i wrote code that already i have listed above but i am getting following error.
I have referred below link for the reference.
How to play Audio file Mp3 from the server
how to play audio file from server in android
But in this both link they have specified particular audio file to play from server and given full path but i don't want to do that.
I know it is clearly saying that I can not cast URL to String, But i don't know how can i solve this. please help.
02-05 01:44:58.690: E/AndroidRuntime(1998): FATAL EXCEPTION: main
02-05 01:44:58.690: E/AndroidRuntime(1998): java.lang.ClassCastException: java.net.URL cannot be cast to java.lang.String
02-05 01:44:58.690: E/AndroidRuntime(1998): at iqual.fidol_final.ServerFileList$1.onItemClick(ServerFileList.java:53)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.widget.AdapterView.performItemClick(AdapterView.java:298)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2788)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.widget.AbsListView$1.run(AbsListView.java:3463)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.os.Handler.handleCallback(Handler.java:730)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.os.Handler.dispatchMessage(Handler.java:92)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.os.Looper.loop(Looper.java:137)
02-05 01:44:58.690: E/AndroidRuntime(1998): at android.app.ActivityThread.main(ActivityThread.java:5103)
02-05 01:44:58.690: E/AndroidRuntime(1998): at java.lang.reflect.Method.invokeNative(Native Method)
02-05 01:44:58.690: E/AndroidRuntime(1998): at java.lang.reflect.Method.invoke(Method.java:525)
02-05 01:44:58.690: E/AndroidRuntime(1998): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
02-05 01:44:58.690: E/AndroidRuntime(1998): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-05 01:44:58.690: E/AndroidRuntime(1998): at dalvik.system.NativeStart.main(Native Method)
回答1:
Why don't you first prepare the proper URL required to be played by converting your URL object to String?
Something like change this: playSong(urlAudio + myList.get(position));
to
playSong(urlAudio.toString() + myList.get(position));
回答2:
I don't know if this code help you or not
but try it:
before oncreate.
Uri uri;
add to your code
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//playSong(urlAudio + myList.get(position));
uri = Uri.parse(urlAudio);
playSong(urlAudio + myList.get(position));
}
});
add to playSong:
private void playSong(String songPath) {
try {
MediaPlayer mp = new MediaPlayer();
mp.setDataSource(this, uri);
mp.prepare();
mp.start();
}
catch (NullReferenceArgument e) {
Log.d(TAG, "NullReferenceException: " + e.getMessage());
}
catch (IllegalStateException e) {
Log.d(TAG, "IllegalStateException: " + e.getMessage());
}
catch (IOException e) {
Log.d(TAG, "IOException: " + e.getMessage());
}
catch (IllegalArgumentException e) {
Log.d(TAG, "IllegalArgumentException: " + e.getMessage());
}
catch (SecurityException e) {
Log.d(TAG, "SecurityException: " + e.getMessage());
}
回答3:
I have managed to solve this problem, Just added below piece of code to my onItemClicklistner and it is working fine now,
String url = null;
Object o = myList.get(position);
url = o.toString().replace(" ", "%20").trim();
play = (PlaySongAsy) new PlaySongAsy(url).execute();
来源：https://stackoverflow.com/questions/21570709/how-to-play-audio-from-server-in-android