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在我的許多活動應用程序中，我試圖在一項活動中進行錄製並將其存儲在電話文件中。然後在另一個活動中，我想要播放該文件。我想我可能對如何保存原始文件存在問題，因爲它想要讀取文件時會在第二個活動中崩潰。我不知道如何保存一個活動，然後在下一個活動中讀取該音頻文件。我已經包含了我認爲是來自兩個活動的相關代碼。在一項活動中錄製和保存音頻並在另一項活動中播放音頻
//This is the Activity that simply records and then saves the audio file
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Context mContext = getApplicationContext();
createTempFile("Status_Recorder.txt", "INPROGRESS");
/*
* Create the file where the audio tone that is recorded will be saved
*
*/
try{
FileOutputStream fOut = openFileOutput("audio_test_right.3gp" , MODE_WORLD_READABLE);
}catch(IOException e) {
e.printStackTrace();
exit_function();
}
path = mContext.getFilesDir()+"/audio_test_right.3gp";
start_recording();
}
//Method to Start the Recording
private void start_recording() {
//Intialize the recorder
try{
speaker_recorder = new MediaRecorder();
speaker_recorder.reset();
} catch(Exception e){
Log.e(log_tag,"Recorder Initialization Failed");
createTempFile("Status.txt", "COMPLETED-RECORDER FAILED");
}
//Setting for the Recorder
try{
Log.i(log_tag,"Setting the recorder");
speaker_recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
speaker_recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
speaker_recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
speaker_recorder.setOutputFile(path);
} catch(Exception e){
Log.e(log_tag,"Recording Settings Failed");
createTempFile("Status.txt", "COMPLETED-RECORDER FAILED");
}
//Prepare the Recorder
try{
Log.i(log_tag,"Preparing the Recorder");
speaker_recorder.prepare();
} catch(Exception e){
Log.e(log_tag,"Recording failed");
createTempFile("Status.txt", "COMPLETED-RECORDER FAILED");
exit_function();
}
//Start the Recorder
try {
Log.i(log_tag,"Starting the recorder");
title_text = ((TextView) findViewById(R.id.textView));
title_text.setTextColor(Color.RED);
title_text.setText("RECORDING");
speaker_recorder.start();
// Thread.sleep(10000);
mHandler.postDelayed(new Runnable() {
public void run() {
createTempFile("Status_Recorder.txt", "COMPLETED-RECORDER FAILED");
exit_function();
}
}, timer);
} catch (Exception e) {
Log.e(log_tag,"Recorder start failed");
createTempFile("Status.txt", "COMPLETED-RECORDER FAILED");
exit_function();
}
}
private void exit_function() {
if (speaker_recorder != null) {
speaker_recorder.release();
}
onDestroy();
}
@Override
/*
* (non-Javadoc)
* @see android.app.Activity#onDestroy()
* Function invoked before we exit the application . Reset all the volume
* and stream values in this function
*/
protected void onDestroy() {
Log.i(log_tag,"Entered onDestroy()");
super.onDestroy();
this.finish();
}
/*
* Function to create the a text file in the application directory context. This function
* takes the file name and the string that is to be written in it as the input. This function is invoked
* to create the Result.txt file.
*/
private void createTempFile(String filename, String text) {
try {
FileOutputStream fOut = openFileOutput(filename , MODE_WORLD_READABLE);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write(text);
osw.flush();
osw.close();
} catch(IOException e) {
e.printStackTrace();
}
}
//這是第二個活動，但它到達mp.setDataSource（path）時崩潰;因爲我猜它不能找到路徑
private void playSound(boolean speakers) {
mContext = getApplicationContext();
// audioManager.setMicrophoneMute(true);
path = mContext.getFilesDir() + "/audio_test_right.3gp";
audioManager.setSpeakerphoneOn(true);
try {
mp.setDataSource(path);
} catch (IOException e) {
e.printStackTrace();
}
if (speakers) {
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
} else {
mp.setAudioStreamType(AudioManager.STREAM_VOICE_CALL);
}
mp.start();
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
createTempFile("Status_RightSpeaker.txt", "COMPLETED");
exit_function();
}
});
}
}
你是了不起的！我試圖通過這個Android的東西絆倒我，並且你一直在拯救我的生命。非常感謝！！！！ – Toby