I'm developing a Android audio application. Now, I'm capturing
and playing audio with sucess and I want to add a new feature, the capture and playing through bluetooh headset.
I have been reading about that, and seems that I must manage the ACTION_MEDIA_BUTTON
event:
Java file:
....
public class audioBroadcastReceiver extends BroadcastReceiver
{
public void onReceive(Context context, Intent intent)
{
if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction()))
{
Log.d("","#### WORKS" );
}
else
{
Log.d("","#### ????" );
}
....
xml file
....
<receiver android:name="audioBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON">
</action>
</intent-filter>
</receiver>
<uses-permission android:name="android.permission.BLUETOOTH" />
But nothing happens, so, somebody may give me a example or a idea for:
1º Know when the bluetooh has been connected.
2º Routed the audio packets through bluetooh headset.
Thanks!
You need the bluetoothAdapter method.
BluetoothAdapter blueT = BluetoothAdapter.getDefaulAdapter();
// create broadcast receiver
BroadcastReceiver blueReceiver = new BroadcastReceiver(){
// todo switch states to turn on or off or check is on
// check is on is something like this:
case (blueT.STATE_ON) : {
// do something with it
}
if(blueT.isEnabled()){
do something
}
Related
I am trying to implement Twilio SDK and i have done it, It is working fine when APP is in memory not killed..
Now I have to implement Twilio to get calls any time if my app is is killed or not.
How can i achieve this like by any service in background or any other solution.
Thanks in advance.
I have not worked with twillo api, but you can achieve events of calling from android system using following code. You should try this out.
To register Broadcast Receiver, write below codes in AndroidMainifest.xml file.
<receiver android:name=".PhoneStateReceiver">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
</receiver>
to give phone state permission to your app use below code in your AndroidManifest.xml file
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
Below is Broadcast Receiver
public class PhoneStateReciver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
try
{
System.out.println("Receiver start");
String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
if(state.equals(TelephonyManager.EXTRA_STATE_RINGING)){
Toast.makeText(context,"Ringing State Number is -"+incomingNumber,Toast.LENGTH_SHORT).show();
}
if ((state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK))){
Toast.makeText(context,"Received State",Toast.LENGTH_SHORT).show();
}
if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)){
Toast.makeText(context,"Idle State",Toast.LENGTH_SHORT).show();
}
}catch (Exception e){
e.printStackTrace();
}
}
}
How can I get key events when a user presses various buttons in a service or broadcast receiver? I'm specifically interested in knowing when the user presses a volume button so that I can trigger something else in the background, like a voice recorder.
Unfortunately, my internet searches haven't produced any results.
Something like the following should work:
From official documentation:
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"...>
//code, like activities, etc
<receiver android:name="com.example.test.VolumeBroadcast" >
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON" />
</intent-filter>
</application>
Example of a receiver:
public class VolumeBroadcast extends BroadcastReceiver{
public void onReceive(Context context, Intent intent) {
//check the intent something like:
if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction())) {
KeyEvent event = (KeyEvent)intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
if (KeyEvent.KEYCODE_MEDIA_PLAY == event.getKeyCode()) {
// Handle key press.
}
}
}
}
The way you register is like that:
AudioManager am = mContext.getSystemService(Context.AUDIO_SERVICE);
// Start listening for button presses
am.registerMediaButtonEventReceiver(RemoteControlReceiver);
// Stop listening for button presses
am.unregisterMediaButtonEventReceiver(RemoteControlReceiver);
Page below:
Audio Playback
I am writing a Gallery like app.
I want to be notified when an image is copied to device via MTP.
I tried to register a broadcast receiver to listen for media scanner finished action, but it never got called. I tried to both register in AndroidManifest.xml or register in Java code, neither works.
<receiver android:name="com.robin.huangwei.omnigif.content.MediaScannerReceiver"
android:enabled="true" >
<intent-filter>
<action android:name="android.intent.action.MEDIA_SCANNER_FINISHED" />
<data android:scheme="file" />
</intent-filter>
</receiver>
public class MediaScannerReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.i("-----", "Scan finished, new item: " + intent);
}
}
or using JAVA code as below
mReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Log.i("-----", "Scan finished, new item: " + intent);
}
};
IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_SCANNER_FINISHED);
filter.addDataScheme("file");
registerReceiver(mReceiver, filter);
None of the above works.
Whats wrong with my code? I can see every time a new image is copied, it could show in Gallery App. It might be using content observer to watch the media store database, which I don't want to.
I just want to be notified when a new image is added into the device storage via MTP. Since it is added into media store, which must be done by media scanner, why cannot my app capture the broadcast intent? If this is not even correct, I want to know the answer I post as the title.
I am working in Android 2.1, and I want to detect when the headset is plugged in/taken out. I'm pretty new to android.
I think the way to do it is using a Broadcast receiver. I sublcassed this, and I also put the following in my AndroidManifest.xml. But do you have to register the receiver somehwere else, like in the activity? I'm aware there are lots of threads on this, but I don't really understand what they're talking about. Also, what's the difference between registering in AndroidManifest.xml versus registering dynamically in your activity?
<receiver android:enabled="true" android:name="AudioJackReceiver" >
<intent-filter>
<action android:name="android.intent.action.HEADSET_PLUG" >
</action>
</intent-filter>
</receiver>
And this was the implementation of the class (plus imports)
public class AudioJackReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.w("DEBUG", "headset state received");
}
}
I was just trying to see if it works, but nothing shows up when I unplug/plug in the headset while running the application.
EDIT: the documentation doesn't say this, but is it possible that this one won't work if registered in the manifest? I was able to get it to respond when I registered the receiver in one of my applications (or do you have to do that anyway?)
Just complementing Greg`s answer, here is the code that you need divided in two parts
Register the Service in the first Activity (here its called MainActivity.java).
Switch over the result of the ACTION_HEADSET_PLUG action in the BroadCastReceiver.
Here it goes:
public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private MusicIntentReceiver myReceiver;
#Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myReceiver = new MusicIntentReceiver();
}
#Override public void onResume() {
IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
registerReceiver(myReceiver, filter);
super.onResume();
}
private class MusicIntentReceiver extends BroadcastReceiver {
#Override public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_HEADSET_PLUG)) {
int state = intent.getIntExtra("state", -1);
switch (state) {
case 0:
Log.d(TAG, "Headset is unplugged");
break;
case 1:
Log.d(TAG, "Headset is plugged");
break;
default:
Log.d(TAG, "I have no idea what the headset state is");
}
}
}
}
Here are two sites that may help explain it in more detail:
http://www.grokkingandroid.com/android-tutorial-broadcastreceiver/
http://www.vogella.com/articles/AndroidBroadcastReceiver/article.html
You have to define your intent; otherwise it won't access the system function. The broadcast receiver; will alert your application of changes that you'd like to listen for.
Every receiver needs to be subclassed; it must include a onReceive(). To implement the onReceive() you'll need to create a method that will include two items: Context & Intent.
More then likely a service would be ideal; but you'll create a service and define your context through it. In the context; you'll define your intent.
An example:
context.startService
(new Intent(context, YourService.class));
Very basic example. However; your particular goal is to utilize a system-wide broadcast. You want your application to be notified of Intent.ACTION_HEADSET_PLUG.
How to subscribe through manifest:
<receiver
android:name="AudioJackReceiver"
android:enabled="true"
android:exported="true" >
<intent-filter>
<action android:name="android.intent.action.HEADSET_PLUG" />
</intent-filter>
</receiver>
Or you can simply define through your application; but. Your particular request; will require user permissions if you intend to detect Bluetooth MODIFY_AUDIO_SETTINGS.
You need to enable the broadcast receiver and set the exported attribute to true:
<receiver
android:name="AudioJackReceiver"
android:enabled="true"
android:exported="true" >
<intent-filter>
<action android:name="android.intent.action.HEADSET_PLUG" />
</intent-filter>
</receiver>
In the Android 2.3.3 BluetoothChat example with with createInsecureRfcommSocketToServiceRecord() API, users are still prompted to accept the pairing request, even though no PIN code is presented.
Is there a way to automate Bluetooth pairing request without user intervention? Or is this never possible due to security concerns? I have been looking online for 2 days now and haven't really found much, so if anybody knows, please post.
Thanks!
So, I had this cuestion, if some one needs the answer to this working in android 4.4.2
IntentFilter filter = new IntentFilter(
"android.bluetooth.device.action.PAIRING_REQUEST");
/*
* Registering a new BTBroadcast receiver from the Main Activity context
* with pairing request event
*/
registerReceiver(
new PairingRequest(), filter);
and the code for the Receiver
public static class PairingRequest extends BroadcastReceiver {
public PairingRequest() {
super();
}
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("android.bluetooth.device.action.PAIRING_REQUEST")) {
try {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
int pin=intent.getIntExtra("android.bluetooth.device.extra.PAIRING_KEY", 0);
//the pin in case you need to accept for an specific pin
Log.d("PIN", " " + intent.getIntExtra("android.bluetooth.device.extra.PAIRING_KEY",0));
//maybe you look for a name or address
Log.d("Bonded", device.getName());
byte[] pinBytes;
pinBytes = (""+pin).getBytes("UTF-8");
device.setPin(pinBytes);
//setPairing confirmation if neeeded
device.setPairingConfirmation(true);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
and in the manifest file
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
and the broadcastReceiver
<receiver android:name=".MainActivity$PairingRequest">
<intent-filter>
<action android:name="android.bluetooth.device.action.PAIRING_REQUEST" />
<action android:name="android.bluetooth.device.action.PAIRING_CANCEL" />
</intent-filter>
</receiver>
Not with the standard API, no: if the MAC address is not already in the pairing database there will always be the prompt. I'm told that if you have a device that has been rooted and have public read/write access to the bluetooth service's DBus endpoint you can work around that but I've never seen that actually implemented.
i came across the same problem, i hope the following code will help:
firsly we need:
<receiver android:name=".broadcast.PairingRequest">
<intent-filter>
<action android:name="android.bluetooth.device.action.PAIRING_REQUEST" />
<action android:name="android.bluetooth.device.action.PAIRING_CANCEL" />
</intent-filter></receiver>
secondly we need the BluetoothDevice class, and:
public class PairingRequest extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent){
if (intent.getAction().equals("ACTION_PAIRING_REQUEST")) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
byte[] pinBytes = BluetoothDevice.convertPinToBytes("1234");
device.setPin(pinBytes);
}
}
}