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How to detect
phone call
@magiepooh
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About me
@magiepooh
@magie_pooh
Takuma Fujita
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Company
AbemaTV, Inc.
(Cyber Agent, Inc.)
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How to detect
phone call
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Pattern 1:
Use TelephonyManager
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PhoneStateChangeListener l = new PhoneStateChangeListener();
TelephonyManager tm =
(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVI
CE);
tm.listen(l, PhoneStateListener.LISTEN_CALL_STATE);
public class MyListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
//…
case TelephonyManager.CALL_STATE_OFFHOOK:
//…
case TelephonyManager.CALL_STATE_IDLE:
//…
}
}
}
http://stackoverflow.com/questions/9684866/how-to-detect-when-phone-is-answered-or-rejected
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PhoneStateChangeListener l = new PhoneStateChangeListener();
TelephonyManager tm =
(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVI
CE);
tm.listen(l, PhoneStateListener.LISTEN_CALL_STATE);
public class MyListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
//…
case TelephonyManager.CALL_STATE_OFFHOOK:
//…
case TelephonyManager.CALL_STATE_IDLE:
//…
}
}
}
http://stackoverflow.com/questions/9684866/how-to-detect-when-phone-is-answered-or-rejected
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PhoneStateChangeListener l = new PhoneStateChangeListener();
TelephonyManager tm =
(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVI
CE);
tm.listen(l, PhoneStateListener.LISTEN_CALL_STATE);
public class MyListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
//…
case TelephonyManager.CALL_STATE_OFFHOOK:
//…
case TelephonyManager.CALL_STATE_IDLE:
//…
}
}
}
http://stackoverflow.com/questions/9684866/how-to-detect-when-phone-is-answered-or-rejected
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PhoneStateChangeListener l = new PhoneStateChangeListener();
TelephonyManager tm =
(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVI
CE);
tm.listen(l, PhoneStateListener.LISTEN_CALL_STATE);
public class MyListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
//…
case TelephonyManager.CALL_STATE_OFFHOOK:
//…
case TelephonyManager.CALL_STATE_IDLE:
//…
}
}
}
http://stackoverflow.com/questions/9684866/how-to-detect-when-phone-is-answered-or-rejected
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PhoneStateChangeListener l = new PhoneStateChangeListener();
TelephonyManager tm =
(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVI
CE);
tm.listen(l, PhoneStateListener.LISTEN_CALL_STATE);
public class MyListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
//…
case TelephonyManager.CALL_STATE_OFFHOOK:
//…
case TelephonyManager.CALL_STATE_IDLE:
//…
}
}
}
http://stackoverflow.com/questions/9684866/how-to-detect-when-phone-is-answered-or-rejected
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PhoneStateChangeListener l = new PhoneStateChangeListener();
TelephonyManager tm =
(TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVI
CE);
tm.listen(l, PhoneStateListener.LISTEN_CALL_STATE);
public class MyListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch(state){
case TelephonyManager.CALL_STATE_RINGING:
//…
case TelephonyManager.CALL_STATE_OFFHOOK:
//…
case TelephonyManager.CALL_STATE_IDLE:
//…
}
}
}
http://stackoverflow.com/questions/9684866/how-to-detect-when-phone-is-answered-or-rejected
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Need Permission…
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Pattern 2:
Use AudioManager
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AudioManager.
OnAudioFocusChangeListener
• Interface definition for a callback to be
invoked when the audio focus of the system
is updated
• Added in API level 8
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public class MyAudioFocusMonitor implements
AudioManager.OnAudioFocusChangeListener {
private final AudioManager audioManager;
public MyAudioFocusMonitor(Context context) {
audioManager =
(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
}
public void start() {
audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN);
}
public void stop() {
audioManager.abandonAudioFocus(this);
}
}
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public class MyAudioFocusMonitor implements
AudioManager.OnAudioFocusChangeListener {
private final AudioManager audioManager;
public MyAudioFocusMonitor(Context context) {
audioManager =
(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
}
public void start() {
audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN);
}
public void stop() {
audioManager.abandonAudioFocus(this);
}
}
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public class MyAudioFocusMonitor implements
AudioManager.OnAudioFocusChangeListener {
private final AudioManager audioManager;
public MyAudioFocusMonitor(Context context) {
audioManager =
(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
}
public void start() {
audioManager.requestAudioFocus(this,
AudioManager.STREAM_MUSIC,
// Request permanent focus.
AudioManager.AUDIOFOCUS_GAIN);
}
public void stop() {
audioManager.abandonAudioFocus(this);
}
}
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public class MyAudioFocusMonitor implements
AudioManager.OnAudioFocusChangeListener {
private final AudioManager audioManager;
public MyAudioFocusMonitor(Context context) {
audioManager =
(AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
}
public void start() {
audioManager.requestAudioFocus(this,
AudioManager.STREAM_MUSIC,
// Request permanent focus.
AudioManager.AUDIOFOCUS_GAIN);
}
public void stop() {
audioManager.abandonAudioFocus(this);
}
}
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Audio Focus
• AUDIOFOCUS_GAIN
• unknown duration
• AUDIOFOCUS_GAIN_TRANSIENT
• a short amount of time
• AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE
• ≒AUDIOFOCUS_GAIN_TRANSIENT
• a short amount of time, during which no other applications, or system
components, should play anything.
• AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK
• ≒AUDIOFOCUS_GAIN_TRANSIENT
• other audio applications to keep playing after having lowered their output level
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@Override public void onAudioFocusChange(int focusChange) {
switch (focusChange) {
case AudioManager.AUDIOFOCUS_REQUEST_GRANTED:
// play
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
// pause
break;
case AudioManager.AUDIOFOCUS_LOSS:
// stop
audioManager.abandonAudioFocus(this);
break;
default:
break;
}
}
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@Override public void onAudioFocusChange(int focusChange) {
switch (focusChange) {
case AudioManager.AUDIOFOCUS_REQUEST_GRANTED:
// … (play
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
// … (pause
break;
case AudioManager.AUDIOFOCUS_LOSS:
// … (stop
audioManager.abandonAudioFocus(this);
break;
}
}
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@Override public void onAudioFocusChange(int focusChange) {
switch (focusChange) {
case AudioManager. AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
// Lower the volume
case AudioManager. AUDIOFOCUS_GAIN:
// Raise it back to normal
}
}
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Conclusion
• TelephonyManager needs permission
• AudioManager do not need permission
• but status is complicated
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(๑•̀ŷ•́)و✧