Blank the screen while playing voicemail using proximity sensor.
This commit blanks the screen when the proximity sensor tells us that
there is an object close to the screen.
This is to avoid accidental touching of UI element with your face while
listening to voicemail.
As a consequence, do not enable this if listening to voicemail using the
speaker phone, because in that case we do not need to blank the screen
at all as the user is unlikely to have the phone near their ear.
This is done using a blank view that is placed on top of all other views
and by hiding the action bar. This leave the notification area available
to be accidentally touched, but we cannot hide the notification area
without starting a new activity.
Moreover, we do not want to start a new activity as that would cause our
activity to be stopped, which we do not want to do while the user is
listening to voicemail, as we plan to stop playback when the activity is
paused.
Bug: 5188914
Change-Id: I17bfa7b9d466db7519a97e7ca96f152bde64b78d
diff --git a/src/com/android/contacts/CallDetailActivity.java b/src/com/android/contacts/CallDetailActivity.java
index 6ab4b68..0fadbfb 100644
--- a/src/com/android/contacts/CallDetailActivity.java
+++ b/src/com/android/contacts/CallDetailActivity.java
@@ -69,9 +69,14 @@
* This activity can be either started with the URI of a single call log entry, or with the
* {@link #EXTRA_CALL_LOG_IDS} extra to specify a group of call log entries.
*/
-public class CallDetailActivity extends Activity {
+public class CallDetailActivity extends Activity implements ProximitySensorAware {
private static final String TAG = "CallDetail";
+ /** The time to wait before enabling the blank the screen due to the proximity sensor. */
+ private static final long PROXIMITY_BLANK_DELAY_MILLIS = 100;
+ /** The time to wait before disabling the blank the screen due to the proximity sensor. */
+ private static final long PROXIMITY_UNBLANK_DELAY_MILLIS = 500;
+
/** The enumeration of {@link AsyncTask} objects used in this class. */
public enum Tasks {
MARK_VOICEMAIL_READ,
@@ -115,6 +120,60 @@
/** Whether we should show "edit number before call" in the options menu. */
private boolean mHasEditNumberBeforeCall;
+ private ProximitySensorManager mProximitySensorManager;
+ private final ProximitySensorListener mProximitySensorListener = new ProximitySensorListener();
+
+ /** Listener to changes in the proximity sensor state. */
+ private class ProximitySensorListener implements ProximitySensorManager.Listener {
+ /** Used to show a blank view and hide the action bar. */
+ private final Runnable mBlankRunnable = new Runnable() {
+ @Override
+ public void run() {
+ View blankView = findViewById(R.id.blank);
+ blankView.setVisibility(View.VISIBLE);
+ getActionBar().hide();
+ }
+ };
+ /** Used to remove the blank view and show the action bar. */
+ private final Runnable mUnblankRunnable = new Runnable() {
+ @Override
+ public void run() {
+ View blankView = findViewById(R.id.blank);
+ blankView.setVisibility(View.GONE);
+ getActionBar().show();
+ }
+ };
+
+ @Override
+ public synchronized void onNear() {
+ clearPendingRequests();
+ postDelayed(mBlankRunnable, PROXIMITY_BLANK_DELAY_MILLIS);
+ }
+
+ @Override
+ public synchronized void onFar() {
+ clearPendingRequests();
+ postDelayed(mUnblankRunnable, PROXIMITY_UNBLANK_DELAY_MILLIS);
+ }
+
+ /** Removed any delayed requests that may be pending. */
+ public synchronized void clearPendingRequests() {
+ View blankView = findViewById(R.id.blank);
+ blankView.removeCallbacks(mBlankRunnable);
+ blankView.removeCallbacks(mUnblankRunnable);
+ }
+
+ /** Post a {@link Runnable} with a delay on the main thread. */
+ private synchronized void postDelayed(Runnable runnable, long delayMillis) {
+ // Post these instead of executing immediately so that:
+ // - They are guaranteed to be executed on the main thread.
+ // - If the sensor values changes rapidly for some time, the UI will not be
+ // updated immediately.
+ View blankView = findViewById(R.id.blank);
+ blankView.postDelayed(runnable, delayMillis);
+ }
+ }
+
static final String[] CALL_LOG_PROJECTION = new String[] {
CallLog.Calls.DATE,
CallLog.Calls.DURATION,
@@ -189,6 +248,7 @@
mContactBackgroundView = (ImageView) findViewById(R.id.contact_background);
mDefaultCountryIso = ContactsUtils.getCurrentCountryIso(this);
mContactPhotoManager = ContactPhotoManager.getInstance(this);
+ mProximitySensorManager = new ProximitySensorManager(this, mProximitySensorListener);
configureActionBar();
optionallyHandleVoicemail();
}
@@ -770,4 +830,22 @@
startActivity(intent);
finish();
}
+
+ @Override
+ protected void onPause() {
+ // Immediately stop the proximity sensor.
+ disableProximitySensor(false);
+ mProximitySensorListener.clearPendingRequests();
+ super.onPause();
+ }
+
+ @Override
+ public void enableProximitySensor() {
+ mProximitySensorManager.enable();
+ }
+
+ @Override
+ public void disableProximitySensor(boolean waitForFarState) {
+ mProximitySensorManager.disable(waitForFarState);
+ }
}