Add descriptions to MediaController buttons

This widget was missing some accessibility descriptions.

bug:16536697
Change-Id: I6f50fd1f4fc0a804151ff465b612128d71a1fde6

diff --git a/core/java/android/widget/MediaController.java b/core/java/android/widget/MediaController.java
index 546cc5f..f1aaa4d 100644 (file)
--- a/core/java/android/widget/MediaController.java
+++ b/core/java/android/widget/MediaController.java
@@ -17,6 +17,7 @@
 package android.widget;
 
 import android.content.Context;
+import android.content.res.Resources;
 import android.graphics.PixelFormat;
 import android.media.AudioManager;
 import android.os.Handler;
@@ -55,7 +56,7 @@ import java.util.Locale;
  * <p>
  * Functions like show() and hide() have no effect when MediaController
  * is created in an xml layout.
- * 
+ *
  * MediaController will hide and
  * show the buttons according to these rules:
  * <ul>
@@ -70,32 +71,34 @@ import java.util.Locale;
  */
 public class MediaController extends FrameLayout {
 
-    private MediaPlayerControl  mPlayer;
-    private Context             mContext;
-    private View                mAnchor;
-    private View                mRoot;
-    private WindowManager       mWindowManager;
-    private Window              mWindow;
-    private View                mDecor;
+    private MediaPlayerControl mPlayer;
+    private Context mContext;
+    private View mAnchor;
+    private View mRoot;
+    private WindowManager mWindowManager;
+    private Window mWindow;
+    private View mDecor;
     private WindowManager.LayoutParams mDecorLayoutParams;
-    private ProgressBar         mProgress;
-    private TextView            mEndTime, mCurrentTime;
-    private boolean             mShowing;
-    private boolean             mDragging;
-    private static final int    sDefaultTimeout = 3000;
-    private static final int    FADE_OUT = 1;
-    private static final int    SHOW_PROGRESS = 2;
-    private boolean             mUseFastForward;
-    private boolean             mFromXml;
-    private boolean             mListenersSet;
+    private ProgressBar mProgress;
+    private TextView mEndTime, mCurrentTime;
+    private boolean mShowing;
+    private boolean mDragging;
+    private static final int sDefaultTimeout = 3000;
+    private static final int FADE_OUT = 1;
+    private static final int SHOW_PROGRESS = 2;
+    private boolean mUseFastForward;
+    private boolean mFromXml;
+    private boolean mListenersSet;
     private View.OnClickListener mNextListener, mPrevListener;
-    StringBuilder               mFormatBuilder;
-    Formatter                   mFormatter;
-    private ImageButton         mPauseButton;
-    private ImageButton         mFfwdButton;
-    private ImageButton         mRewButton;
-    private ImageButton         mNextButton;
-    private ImageButton         mPrevButton;
+    StringBuilder mFormatBuilder;
+    Formatter mFormatter;
+    private ImageButton mPauseButton;
+    private ImageButton mFfwdButton;
+    private ImageButton mRewButton;
+    private ImageButton mNextButton;
+    private ImageButton mPrevButton;
+    private CharSequence mPlayDescription;
+    private CharSequence mPauseDescription;
 
     public MediaController(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -132,7 +135,7 @@ public class MediaController extends FrameLayout {
         mDecor.setOnTouchListener(mTouchListener);
         mWindow.setContentView(this);
         mWindow.setBackgroundDrawableResource(android.R.color.transparent);
-        
+
         // While the media controller is up, the volume control keys should
         // affect the media stream type
         mWindow.setVolumeControlStream(AudioManager.STREAM_MUSIC);
@@ -201,7 +204,7 @@ public class MediaController extends FrameLayout {
             return false;
         }
     };
-    
+
     public void setMediaPlayer(MediaPlayerControl player) {
         mPlayer = player;
         updatePausePlay();
@@ -249,6 +252,11 @@ public class MediaController extends FrameLayout {
     }
 
     private void initControllerView(View v) {
+        Resources res = mContext.getResources();
+        mPlayDescription = res
+                .getText(com.android.internal.R.string.lockscreen_transport_play_description);
+        mPauseDescription = res
+                .getText(com.android.internal.R.string.lockscreen_transport_pause_description);
         mPauseButton = (ImageButton) v.findViewById(com.android.internal.R.id.pause);
         if (mPauseButton != null) {
             mPauseButton.requestFocus();
@@ -271,7 +279,7 @@ public class MediaController extends FrameLayout {
             }
         }
 
-        // By default these are hidden. They will be enabled when setPrevNextListeners() is called 
+        // By default these are hidden. They will be enabled when setPrevNextListeners() is called
         mNextButton = (ImageButton) v.findViewById(com.android.internal.R.id.next);
         if (mNextButton != null && !mFromXml && !mListenersSet) {
             mNextButton.setVisibility(View.GONE);
@@ -328,7 +336,7 @@ public class MediaController extends FrameLayout {
             // the buttons.
         }
     }
-    
+
     /**
      * Show the controller on screen. It will go away
      * automatically after 'timeout' milliseconds of inactivity.
@@ -347,7 +355,7 @@ public class MediaController extends FrameLayout {
             mShowing = true;
         }
         updatePausePlay();
-        
+
         // cause the progress bar to be updated even if mShowing
         // was already true.  This happens, for example, if we're
         // paused with the progress bar showing the user hits play.
@@ -359,7 +367,7 @@ public class MediaController extends FrameLayout {
             mHandler.sendMessageDelayed(msg, timeout);
         }
     }
-    
+
     public boolean isShowing() {
         return mShowing;
     }
@@ -525,8 +533,10 @@ public class MediaController extends FrameLayout {
 
         if (mPlayer.isPlaying()) {
             mPauseButton.setImageResource(com.android.internal.R.drawable.ic_media_pause);
+            mPauseButton.setContentDescription(mPauseDescription);
         } else {
             mPauseButton.setImageResource(com.android.internal.R.drawable.ic_media_play);
+            mPauseButton.setContentDescription(mPlayDescription);
         }
     }
 
@@ -668,7 +678,7 @@ public class MediaController extends FrameLayout {
 
         if (mRoot != null) {
             installPrevNextListeners();
-            
+
             if (mNextButton != null && !mFromXml) {
                 mNextButton.setVisibility(View.VISIBLE);
             }

diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index c34560d..4bcf80d 100644 (file)
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -2540,15 +2540,19 @@
     Contact your wireless service provider for another SIM card.</string>
 
     <!-- Shown on transport control of lockscreen. Pressing button goes to previous track. -->
-    <string name="lockscreen_transport_prev_description">Previous track button</string>
+    <string name="lockscreen_transport_prev_description">Previous track</string>
     <!-- Shown on transport control of lockscreen. Pressing button goes to next track. -->
-    <string name="lockscreen_transport_next_description">Next track button</string>
+    <string name="lockscreen_transport_next_description">Next track</string>
     <!-- Shown on transport control of lockscreen. Pressing button pauses playback -->
-    <string name="lockscreen_transport_pause_description">Pause button</string>
+    <string name="lockscreen_transport_pause_description">Pause</string>
     <!-- Shown on transport control of lockscreen. Pressing button pauses playback -->
-    <string name="lockscreen_transport_play_description">Play button</string>
+    <string name="lockscreen_transport_play_description">Play</string>
     <!-- Shown on transport control of lockscreen. Pressing button pauses playback -->
-    <string name="lockscreen_transport_stop_description">Stop button</string>
+    <string name="lockscreen_transport_stop_description">Stop</string>
+    <!-- Shown on transport control screens. Pressing button rewinds playback [CHAR LIMIT=NONE]-->
+    <string name="lockscreen_transport_rew_description">Rewind</string>
+    <!-- Shown on transport control screens. Pressing button fast forwards playback [CHAR LIMIT=NONE]-->
+    <string name="lockscreen_transport_ffw_description">Fast forward</string>
 
     <!-- Shown in the lock screen when there is emergency calls only mode. -->
     <string name="emergency_calls_only" msgid="2485604591272668370">Emergency calls only</string>

diff --git a/core/res/res/values/styles.xml b/core/res/res/values/styles.xml
index a5cac6b..e693d91 100644 (file)
--- a/core/res/res/values/styles.xml
+++ b/core/res/res/values/styles.xml
@@ -1105,26 +1105,32 @@ please see styles_device_defaults.xml.
 
     <style name="MediaButton.Previous">
         <item name="src">@drawable/ic_media_previous</item>
+        <item name="contentDescription">@string/lockscreen_transport_prev_description</item>
     </style>
 
     <style name="MediaButton.Next">
         <item name="src">@drawable/ic_media_next</item>
+        <item name="contentDescription">@string/lockscreen_transport_next_description</item>
     </style>
 
     <style name="MediaButton.Play">
         <item name="src">@drawable/ic_media_play</item>
+        <item name="contentDescription">@string/lockscreen_transport_play_description</item>
     </style>
 
     <style name="MediaButton.Ffwd">
         <item name="src">@drawable/ic_media_ff</item>
+        <item name="contentDescription">@string/lockscreen_transport_ffw_description</item>
     </style>
 
     <style name="MediaButton.Rew">
         <item name="src">@drawable/ic_media_rew</item>
+        <item name="contentDescription">@string/lockscreen_transport_rew_description</item>
     </style>
 
     <style name="MediaButton.Pause">
         <item name="src">@drawable/ic_media_pause</item>
+        <item name="contentDescription">@string/lockscreen_transport_pause_description</item>
     </style>
 
     <style name="ZoomControls">

diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 6030715..3956bdf 100644 (file)
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -976,6 +976,8 @@
   <java-symbol type="string" name="ssl_ca_cert_noti_by_unknown" />
   <java-symbol type="string" name="ssl_ca_cert_noti_managed" />
   <java-symbol type="string" name="ssl_ca_cert_warning" />
+  <java-symbol type="string" name="lockscreen_transport_play_description" />
+  <java-symbol type="string" name="lockscreen_transport_pause_description" />
 
   <java-symbol type="plurals" name="abbrev_in_num_days" />
   <java-symbol type="plurals" name="abbrev_in_num_hours" />