I am working on application that will record the voice of the user and save the file on the SD card and then allow the user to listen to the audio again.
I am able to allow the user to record his voice using the RecognizerIntent, but I cant figure out how to save the audio file and allow the user to hear the audio. I would appreciate it if someone could help me out. I have displayed my code below:
// Setting up the onClickListener for Audio Button
attachVoice = (Button) findViewById(R.id.AttachVoice_questionandanswer);
attachVoice.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent voiceIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
voiceIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
voiceIntent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Please Speak");
startActivityForResult(voiceIntent, VOICE_REQUEST);
}
});
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(requestCode == VOICE_REQUEST && resultCode == RESULT_OK){
}
There is an example of how to do audio capture using MediaRecorder in the Android Developer Documentation.
I would recommend saving the files on the SD Card and then have your gallery code check the SD card to see which files to display. You can get the directory of the SD Card using the Environment.getExternalStorageDirectory() method. It would be best to save your files in a subdirectory of the SD Card root directory.
Make sure you give your applications the Permissions it will need. At the very least it will need RECORD_AUDIO and WRITE_EXTERNAL_STORAGE.
Also you have to see these tutorials:
http://www.androiddevblog.net/android/android-audio-recording-part-1
http://www.androiddevblog.net/android/android-audio-recording-part-2
If you really want to record audio via the speech recognition API then you could use the RecognitionService.Callback which has a method
void bufferReceived(byte[] buffer)
This gives you access to the recorded audio buffer as speech is being recorded and recognized. (No information is provided about the sample rate though.) You can then save the obtained buffers into a file for a later playback. I think keyboard apps use this call to display the waveform of the recorded speech. You have to implement the UI yourself.
The bare RecognizerIntent.ACTION_RECOGNIZE_SPEECH just returns a set of words/phrases without any audio.
Related
I am using Android 5.0 to implement an application which allows to automatically capture and save an image into my phone. Currently, I am using bellow code but it requires press the capture button in Capture UI of my phone. Is it possible to capture and save the image without press the capture button? For example, I just call the function myCaptureandSave(), then the phone will display Capture UI and intermediately capture the image and save, I do not need doing more step.
public void myCaptureandSave() {
String image_path = Environment.getExternalStorageDirectory() +"/"+System.currentTimeMillis()+".jpg";
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
//File dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
File output = new File(image_path);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(output));
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
}
You have to use Camera Api. Create Service, running in background, which hold reference to this api and current SurfaceTexture, it is necessary, camera will be 'previewing to nowhere'. after that you'll be able to take pictures even if device is locaked
Yes it is possible, but I believe you can't do it using the internal camera (calling the intent). You have to use Camera2 API.
I made a library to use Camera2 API, you can take a look at it if you want:
https://github.com/omaflak/Android-Camera2-Library
In your case, simply pass a dummy SurfaceTexture for the preview and call takePicture().
Hope it will help
how to capture an image in background without using the camera application
i tried with this time ago and with little bit changes i got it.
Hope this helps..
I want to capture the video through my application and also need extra information of captured video like Start time , end time , Quality of the video.
Currently I am using existing camera application to capture the video in my application , with sample code
static final int REQUEST_VIDEO_CAPTURE = 1;
private void dispatchTakeVideoIntent() {
Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
if (takeVideoIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE);
}
}
From above sample code , I am able to capture video and store on device but I am not getting any way to get that extra information?
Is it possible to get that extra info using existing camera application?
If yes then how else is there any other way to do this?
Is it possible to get that extra info using existing camera application?
No.
If yes then how else is there any other way to do this?
You are welcome to use the time that you call startActivityForResult() as the start time, the time you are called with onActivityResult() as the end time, and the quality that you request via EXTRA__VIDEO_QUALITY as the quality.
Or, write your own video recorder, using the camera APIs and MediaRecorder.
My ultimate goal is to allow the user to select a folder to save a file to - the file is a video file that will be created at some point after the user has chosen the destination.
I am simply using the storage access framework picker to allow them to select a location for it to be saved in.
First of all, is there a way to allow a user to select only a folder (and not a file/filename)?
The best I can do right now is use the ACTION_CREATE_DOCUMENT Intent in order to get a save location, however I do not really want to specify the filename in the SAF picker (this will be done back in the app)...
Secondly, after reading the Storage Access Framework documentation, and cobbling together some bits from a few code samples, I've got a working DocumentsProvider which almost does what I want - which is to allow the user to browse their external storage (SD Card) directories for a suitable place to save a video file - by adding my own root which points to Environment.getExternalStorageDirectory() to the queryRoots() method.
However, what I really want is for that to be my only root (at the minute I've also got Drive, Downloads etc.).
Is it possible to remove/hide other roots so it essentially becomes an application-specific file picker?
Or even show local storage only (perhaps the Root.FLAG_LOCAL_ONLY flag can help)?
Thanks!
API 21 supports Intent.ACTION_OPEN_DOCUMENT_TREE. This allows you to select the location once and then you can use the provided URI to manipulate its content.
private static final int LOCATION_CHOOSER_REQ_CODE = 4;
public void chooseLocation() {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
startActivityForResult(intent, LOCATION_CHOOSER_REQ_CODE);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == LOCATION_CHOOSER_REQ_CODE && resultCode == Activity.RESULT_OK) {
if (data != null) {
Uri uri = data.getData(); // Use this URI to access files
}
}
I have written a simple application in which the user can:
press a button to open the camera application
take pictures with the camera application
Is there any way to disable the shutter sound of the camera from my code?
I currently hold an Orange Nivo phone with Android 4.1.2 version on it.
A secion of my code is:
public void onClick(View v) {
try {
f = createImageFile();
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
startActivityForResult(cameraIntent, CAMERA_REQUEST);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = BitmapFactory.decodeFile(f.getAbsolutePath());
Bitmap newphoto = Bitmap.createScaledBitmap(photo, 200, 200, false);
imageView.setImageBitmap(newphoto);
I would appreciate any suggestions on how to achieve this effect.
I know that there are applications on Android store that take pictures without the shutter sound, so i suppose there must be a way to do this without rooting the phone.
The simple answer is: you can not!
The reason is that it is against the law to take a picture without the shutter making sound, this is for privacy concerns. Moreover, as you will notice, you can't take a picture even when your camera preview is not set properly, still for privacy reasons.
At this point you have four options:
Find a way to hack the API
Root the phone and disable the shutter sound
Write your own native code for the camera...but this may be highly dependant on the device you're using it
Use the siplest way that is also the way used by most (if not all) the silent camera
applications in the market. Simply intercept the preview frame via the onPreviewFrame callback from your onClickListener and then save it as an image. The major drawback here is that the maximum preview resolution is far less than the maximum picture resolution so the photo you will take this way will have a fairly low resolution. Indeed if you read the comments on the silent camera apps on the market you will see a lot of people complaining about the resolution of the images not being so high. This is the reason why: they use the trick I exaplained you above.
To conclude, there is no easy way to achieve what you want!
I have to develop an android application in which user speaks something and the wav file os send to the server where the googlespeech api shall return some text and i will display it on the android activity screen.
Note : Dont confuse urself with the android Text To Speech library i have to send the wav file
to the client's server.
Problem : I have no idea of howsoever to use this API. I can record the voice from the client and save it in a wav file but don't know how to proceed.
Refer Link : http://mikepultz.com/2011/03/accessing-google-speech-api-chrome-11/
You actually can't record a wav file and use it. At this moment the only way to do it is to get voice from the microphone using android intent:
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-EN");
startActivityForResult(intent, CODE);
And then you can recievie the result in onActvityResult function:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
List<String> matches = data.getStringArrayListExtra(
RecognizerIntent.EXTRA_RESULTS);
}
That is the basic idea.