Add option to hide music controls in lockscreen.

JIRA:CYAN-1566
Change-Id: Iae3dd9914b1685c6bf1e39e421372ce0bdfb93cc

1 files changed, 65 insertions, 9 deletions

diff --git a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardTransportControlView.java b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardTransportControlView.java
index ffa88d5..e8ee81e 100644
--- a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardTransportControlView.java
+++ b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardTransportControlView.java
@@ -20,6 +20,7 @@ import android.app.PendingIntent;
 import android.app.PendingIntent.CanceledException;
 import android.content.Context;
 import android.content.Intent;
+import android.database.ContentObserver;
 import android.graphics.Bitmap;
 import android.media.AudioManager;
 import android.media.IRemoteControlDisplay;
@@ -32,6 +33,8 @@ import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.RemoteException;
 import android.os.SystemClock;
+import android.os.UserHandle;
+import android.provider.Settings;
 import android.text.Spannable;
 import android.text.TextUtils;
 import android.text.style.ForegroundColorSpan;
@@ -75,6 +78,8 @@ public class KeyguardTransportControlView extends FrameLayout implements OnClick
     private AudioManager mAudioManager;
     private IRemoteControlDisplayWeak mIRCD;
     private boolean mMusicClientPresent = true;
+    private boolean mShouldBeShown = true;
+    private boolean mAttachNotified = false;
 
     /**
      * The metadata which should be populated into the view once we've been attached
@@ -126,6 +131,20 @@ public class KeyguardTransportControlView extends FrameLayout implements OnClick
     };
     private KeyguardHostView.TransportCallback mTransportCallback;
 
+    private ContentObserver mSettingsObserver = new ContentObserver(mHandler) {
+        @Override
+        public void onChange(boolean selfChange) {
+            updateSettings();
+        }
+    };
+
+    KeyguardUpdateMonitorCallback mUpdateCallback = new KeyguardUpdateMonitorCallback() {
+        @Override
+        public void onUserSwitched(int userId) {
+            updateSettings();
+        }
+    };
+
     /**
      * This class is required to have weak linkage to the current TransportControlView
      * because the remote process can hold a strong reference to this binder object and
@@ -198,20 +217,48 @@ public class KeyguardTransportControlView extends FrameLayout implements OnClick
     protected void onListenerDetached() {
         mMusicClientPresent = false;
         if (DEBUG) Log.v(TAG, "onListenerDetached()");
-        if (mTransportCallback != null) {
-            mTransportCallback.onListenerDetached();
-        } else {
-            Log.w(TAG, "onListenerDetached: no callback");
-        }
+        callCallbackIfNeeded();
     }
 
     private void onListenerAttached() {
         mMusicClientPresent = true;
         if (DEBUG) Log.v(TAG, "onListenerAttached()");
-        if (mTransportCallback != null) {
+        callCallbackIfNeeded();
+    }
+
+    private void updateSettings() {
+        boolean oldShown = mShouldBeShown;
+        mShouldBeShown = Settings.System.getIntForUser(mContext.getContentResolver(),
+                Settings.System.LOCKSCREEN_MUSIC_CONTROLS, 1, UserHandle.USER_CURRENT) != 0;
+        if (DEBUG) Log.v(TAG, "updateSettings(): mShouldBeShown=" + mShouldBeShown);
+        if (oldShown != mShouldBeShown) {
+            callCallbackIfNeeded();
+            if (mShouldBeShown && mMusicClientPresent
+                    && mCurrentPlayState != RemoteControlClient.PLAYSTATE_NONE) {
+                // send out the play state change event that we suppressed earlier
+                mTransportCallback.onPlayStateChanged();
+            }
+        }
+    }
+
+    private void callCallbackIfNeeded() {
+        if (mTransportCallback == null) {
+            Log.w(TAG, "callCallbackIfNeeded: no callback");
+            return;
+        }
+
+        boolean shouldBeAttached = mMusicClientPresent && mShouldBeShown;
+        if (DEBUG) {
+            Log.v(TAG, "callCallbackIfNeeded(): shouldBeAttached=" + shouldBeAttached +
+                    ", mAttachNotified=" + mAttachNotified);
+        }
+
+        if (shouldBeAttached && !mAttachNotified) {
             mTransportCallback.onListenerAttached();
-        } else {
-            Log.w(TAG, "onListenerAttached(): no callback");
+            mAttachNotified = true;
+        } else if (!shouldBeAttached && mAttachNotified) {
+            mTransportCallback.onListenerDetached();
+            mAttachNotified = false;
         }
     }
 
@@ -245,6 +292,11 @@ public class KeyguardTransportControlView extends FrameLayout implements OnClick
         if (!mAttached) {
             if (DEBUG) Log.v(TAG, "Registering TCV " + this);
             mAudioManager.registerRemoteControlDisplay(mIRCD);
+            KeyguardUpdateMonitor.getInstance(mContext).registerCallback(mUpdateCallback);
+            mContext.getContentResolver().registerContentObserver(
+                    Settings.System.getUriFor(Settings.System.LOCKSCREEN_MUSIC_CONTROLS),
+                    false, mSettingsObserver);
+            updateSettings();
         }
         mAttached = true;
     }
@@ -256,6 +308,8 @@ public class KeyguardTransportControlView extends FrameLayout implements OnClick
         if (mAttached) {
             if (DEBUG) Log.v(TAG, "Unregistering TCV " + this);
             mAudioManager.unregisterRemoteControlDisplay(mIRCD);
+            KeyguardUpdateMonitor.getInstance(mContext).removeCallback(mUpdateCallback);
+            mContext.getContentResolver().unregisterContentObserver(mSettingsObserver);
         }
         mAttached = false;
     }
@@ -381,7 +435,9 @@ public class KeyguardTransportControlView extends FrameLayout implements OnClick
         mBtnPlay.setImageResource(imageResId);
         mBtnPlay.setContentDescription(getResources().getString(imageDescId));
         mCurrentPlayState = state;
-        mTransportCallback.onPlayStateChanged();
+        if (mShouldBeShown) {
+            mTransportCallback.onPlayStateChanged();
+        }
     }
 
     static class SavedState extends BaseSavedState {