在android中使用列表视图从服务器播放音频/视频文件

我正在尝试将HTTP服务器中的所有音频文件列表到列表视图。我能够成功地用下面的代码完成这项工作

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://serverlink/folder/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);
        }
    }

然后

mListView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                play = (PlaySongAsy) new PlaySongAsy(myList.get(position)
                        .replace(" ", "%20").trim()).execute();
            }
        });

在尝试这一点时，我得到了错误，错误如下

02-18 11:49:58.266: E/AndroidRuntime(8276): FATAL EXCEPTION: main
02-18 11:49:58.266: E/AndroidRuntime(8276): java.lang.ClassCastException: java.net.URL cannot be cast to java.lang.String
02-18 11:49:58.266: E/AndroidRuntime(8276):     at iqual.fidol_final.ServerFileList$1.onItemClick(ServerFileList.java:72)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AdapterView.performItemClick(AdapterView.java:295)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AbsListView.performItemClick(AbsListView.java:1073)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2577)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AbsListView$1.run(AbsListView.java:3302)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.os.Handler.handleCallback(Handler.java:605)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.os.Handler.dispatchMessage(Handler.java:92)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.os.Looper.loop(Looper.java:154)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.app.ActivityThread.main(ActivityThread.java:4624)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at java.lang.reflect.Method.invokeNative(Native Method)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at java.lang.reflect.Method.invoke(Method.java:511)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at dalvik.system.NativeStart.main(Native Method)

---

先谢谢你

您可以将php web服务中的歌曲列表转换为JSON字符串。然后从web服务返回JSON字符串，将其解析回某个对象的列表，并用它填充addapter。

只是为了确保我们可以这样做吗

mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
        int position, long id) {

      String url = null;
      Object o = myList.get(position);

      url = o.toString().replace(" ", "%20").trim();      
      play = (PlaySongAsy) new PlaySongAsy(url).execute();
    }
});

---

很难得到满足您所有要求的示例。你应该把这个问题分成几部分。首先搜索如何在php中创建json字符串。其次，学习如何从android调用php web服务，然后学习如何在android中解析json字符串。那么，你有什么问题？@Rakhita，检查我的错误日志，我已经编辑过了。你通过web服务得到了什么，是json字符串吗？@Rakhita，我没有使用任何web服务。我已经使用ivy apache库列出了服务器上的所有音频文件。我不确定您是否可以直接这样做。。myList=lister1.listAllurlAudio；因为我的列表是一个参数化的字符串列表，但是lister1.listAll只返回一个列表…现在它没有给出错误，但是它没有播放音频，这也意味着我听不到任何声音。那么日志呢？如果日志打印了任何内容，这意味着您获取的对象不是字符串。没有其他内容。我已经编辑了答案，请现在检查，它是否有效。。。回答你很好，非常感谢@Rakhita，很棒的工作。。。它正在工作。

private void play(String baseURL) {
        Uri myUri = Uri.parse(baseURL);
        try {
            if (mp == null) {
                this.mp = new MediaPlayer();
            } else {
                mp.stop();
                mp.reset();
            }
            mp.setDataSource(this, myUri); // Go to Initialized state

            mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mp.setOnPreparedListener(this);
            mp.setOnBufferingUpdateListener(this);
            mp.setOnErrorListener(this);

            mp.prepareAsync();

            // mp.setVolume(5.F, 5.F);

            Log.d("", "LoadClip Done");
        } catch (Throwable t) {
            Log.d("", t.toString());
        }
    }

02-18 11:49:58.266: E/AndroidRuntime(8276): FATAL EXCEPTION: main
02-18 11:49:58.266: E/AndroidRuntime(8276): java.lang.ClassCastException: java.net.URL cannot be cast to java.lang.String
02-18 11:49:58.266: E/AndroidRuntime(8276):     at iqual.fidol_final.ServerFileList$1.onItemClick(ServerFileList.java:72)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AdapterView.performItemClick(AdapterView.java:295)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AbsListView.performItemClick(AbsListView.java:1073)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2577)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.widget.AbsListView$1.run(AbsListView.java:3302)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.os.Handler.handleCallback(Handler.java:605)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.os.Handler.dispatchMessage(Handler.java:92)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.os.Looper.loop(Looper.java:154)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at android.app.ActivityThread.main(ActivityThread.java:4624)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at java.lang.reflect.Method.invokeNative(Native Method)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at java.lang.reflect.Method.invoke(Method.java:511)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
02-18 11:49:58.266: E/AndroidRuntime(8276):     at dalvik.system.NativeStart.main(Native Method)

mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
        int position, long id) {

      String url = null;
      Object o = myList.get(position);

      url = o.toString().replace(" ", "%20").trim();      
      play = (PlaySongAsy) new PlaySongAsy(url).execute();
    }
});