Android在列表视图中播放音频文件(Android playing the audio file in a listview)

我有一个listview，显示文件夹/diarioscolastico中的所有文件

这是我的代码

public class ActivityRegistrazione extends ActionBarActivity { private static final String LOG_TAG = "AudioRecordTest"; private static String mFileName = null; private MediaRecorder mRecorder = null; private MediaPlayer mPlayer = null; //Used for audio listview private List<String> myList; File file; ArrayAdapter<String> adapter; //Variabile usata per usare un solo bottone come start/stop boolean mStartRecording = true; private void onRecord(boolean start) { if (start) { //Creo un file per ogni registrazione che viene fatta partire File mFolder = new File(Environment.getExternalStorageDirectory() + "/diarioscolastico"); mFileName = Environment.getExternalStorageDirectory() + "/diarioscolastico"; boolean success = true; if (!mFolder.exists()) { success = mFolder.mkdir(); } if (success) { // Create an audio file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); String audioFileName = "AUDIO_" + timeStamp + "_.3gp"; // Do something on success mFileName += "/"+ audioFileName ; } else { // Do something else on failure } startRecording(); } else { stopRecording(); //Aggiorno la listview con la nuova immagine //Lista con il nuovo elemento List<String> myNewList = new ArrayList<>(); File directory = Environment.getExternalStorageDirectory(); file = new File( directory + "/diarioscolastico" ); File list[] = file.listFiles(); for( int i=0; i< list.length; i++) { myNewList.add(0,list[i].getName()); } //Aggiorno la Listview dell'activity con il nuovo inserimento myList.clear(); myList.addAll(myNewList); adapter.notifyDataSetChanged(); } } private void startRecording() { mRecorder = new MediaRecorder(); mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); mRecorder.setOutputFile(mFileName); mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); try { mRecorder.prepare(); } catch (IOException e) { Log.e(LOG_TAG, "prepare() failed"); } mRecorder.start(); } private void stopRecording() { mRecorder.stop(); mRecorder.release(); mRecorder = null; } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.activity_registrazione); final Button recButton = (Button) findViewById(R.id.recButton); recButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Perform action on click onRecord(mStartRecording); if (mStartRecording) { recButton.setText("Stop"); } else { recButton.setText("Rec"); } mStartRecording = !mStartRecording; } }); ListView audioListView = (ListView) findViewById(R.id.audioList); myList = new ArrayList<>(); adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, android.R.id.text1, myList); File directory = Environment.getExternalStorageDirectory(); file = new File( directory + "/diarioscolastico" ); File list[] = file.listFiles(); for( int i=0; i< list.length; i++) { myList.add(0, list[i].getName()); } audioListView.setAdapter(adapter); //Set all the file in the list. // ListView Item Click Listener audioListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //TODO play the touched audio file in listview } }); } @Override public void onPause() { super.onPause(); if (mRecorder != null) { mRecorder.release(); mRecorder = null; } if (mPlayer != null) { mPlayer.release(); mPlayer = null; } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_activity_registrazione, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }

我的问题是，当我点击列表视图中的音频文件时，我不知道如何启动某些媒体播放器来收听音频。我找到了一些holdoverflow帖子，但它们发布在2010年。

我也找到了这个代码：

Uri myUri = ....; // initialize Uri here MediaPlayer mediaPlayer = new MediaPlayer(); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mediaPlayer.setDataSource(getApplicationContext(), myUri); mediaPlayer.prepare(); mediaPlayer.start();

但是我如何从listview音频文件名中取出uri？

有一些更好的方法来做到这一点？我可以使用一些意图来使用标准的audioplayer吗？

I have a listview that show all files in the folder /diarioscolastico

This is my code

My problem is that when i click an audio file in the listview i don't know how start some media player for listen the audio. I found some hold stackoverflow post but they are posted in the 2010.

I found this code too:

But how can i take the uri from the listview audio file name?

There are some better ways to do this? Can i use some intents for use the standard audioplayer?

最满意答案

您可以使用外部存储的文件路径，然后从中获取URI，然后使用它来启动设备的标准音频播放器

Intent intent = new Intent(); intent.setAction(android.content.Intent.ACTION_VIEW); File file = new File("your file path"); intent.setDataAndType(Uri.fromFile(file), "audio/*"); startActivity(intent);

谢谢

You can use file path from external storage, which you know and then get URI from it, thus use it to launch with standard audio player of your device

Thanks

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