Android將音頻文件保存到內部存儲

Question

目前我已創建了音頻錄製Android應用程序。該文件保存在外部存儲器中。

如果我改變方法爲內部存儲保存MODE_PRIVATE

的背景下

我看了一下保存文件的Android開發，但我不知道如何將文件實例轉換成字節數組保存該文件並加載音頻文件

下面是我的代碼保存音頻文件

public void onClick(View view) throws Exception { 
    if (count == 0) { 

     tbxRecordStatus.setText("Record"); 
     btnRecord.setText("Stop Record"); 

     Toast.makeText(MainActivity.this, "Recording Starts", 
       Toast.LENGTH_SHORT).show(); 
     dateInString = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(
       new Date()).toString(); 
     String fileName = "TVSSSSD_" + dateInString + " record.3gp"; 

     SDCardpath = Environment.getExternalStorageDirectory(); 
     myDataPath = new File(SDCardpath.getAbsolutePath() 
       + "/.My Recordings"); 

     // mydir = context.getDir("media", Context.MODE_PRIVATE); 
     if (!myDataPath.exists()) 
      myDataPath.mkdir(); 


     audiofile = new File(myDataPath + "/" + fileName); 

     Log.d("path", myDataPath.getAbsolutePath()); 
     // File fileWithinMyDir = new File(mydir, fileName); 
     // audiofile = fileWithinMyDir; 
     // FileOutputStream out = new FileOutputStream(fileWithinMyDir); 

     recorder = new MediaRecorder(); 
     recorder.reset(); 
     recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
     recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
     recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
     recorder.setAudioEncodingBitRate(16); 
     recorder.setAudioSamplingRate(44100); 

     recorder.setOutputFile(audiofile.getAbsolutePath()); 

     recorder.prepare(); 

     recorder.start(); 

     count++; 

    } else { 

     tbxRecordStatus.setText("Stop"); 
     btnRecord.setText("Start Record"); 
     Toast.makeText(MainActivity.this, "Recording Stops", 
       Toast.LENGTH_SHORT).show(); 
     if (recorder != null) { 
      recorder.stop(); 
      recorder.release(); 

      recorder = null; 

     } else { 
      tbxRecordStatus.setText("Warning!"); 
      Toast.makeText(MainActivity.this, "Record First", 
        Toast.LENGTH_SHORT).show(); 
     } 
     count = 0; 
    } 
} 

下面是我的代碼加載音頻文件

recordList = new ArrayList<String>(); 
    File directory = Environment.getExternalStorageDirectory(); 
    file = new File(directory + "/My Recordings"); 
    File list[] = file.listFiles(); 
    for (int i = 0; i < list.length; i++) { 
     recordList.add(list[i].getName()); 
    } 

    Collections.sort(recordList, Collections.reverseOrder()); 

    listview = (ListView) findViewById(R.id.listView); 
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 
      android.R.layout.simple_list_item_1, android.R.id.text1, 
      recordList); 


    listview.setAdapter(adapter); 

    listview.setTextFilterEnabled(true); 

    listview.setOnItemClickListener(new OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View view, int position, 
       long arg3) { 
      // TODO Auto-generated method stub 


      String product = ((TextView) view).getText().toString(); 
      String fullPathAudio = file.getAbsolutePath() + "/" + product; 

      File resultFile = new File(fullPathAudio); 

      Intent intent = new Intent(); 
      intent.setAction(android.content.Intent.ACTION_VIEW); 
      intent.setDataAndType(Uri.fromFile(resultFile), "audio/*"); 
      startActivity(intent); 
     } 
    }); 

Answer 1

使用getFilesDir()

SDCardpath = getFilesDir(); 
     myDataPath = new File(SDCardpath.getAbsolutePath() 
       + "/.My Recordings"); 

     // mydir = context.getDir("media", Context.MODE_PRIVATE); 
     if (!myDataPath.exists()) 
      myDataPath.mkdir(); 


     audiofile = new File(myDataPath + "/" + fileName); 

更多看到Using the Internal Storage