How to detect phone call

How to detect phone call for Android

Transcript

1. How to detect
   phone call
   @magiepooh
   

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2. About me
   @magiepooh
   @magie_pooh
   Takuma Fujita
   

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3. Company
   AbemaTV, Inc.
   (Cyber Agent, Inc.)
   

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4. How to detect
   phone call
   

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5. Pattern 1:
   Use TelephonyManager
   

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6. 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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7. 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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8. 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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9. 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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10. 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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11. 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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12. Need Permission…
    "android.permission.READ_PHONE_STATE"/>
    

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13. Pattern 2:
    Use AudioManager
    

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14. 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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15. 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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16. 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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17. 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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18. 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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19. 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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20. @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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21. @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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22. @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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23. Conclusion
    • TelephonyManager needs permission
    • AudioManager do not need permission
    • but status is complicated
    

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24. (๑•̀ŷ•́)و✧
    

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