Expose API to query devices for supported keys

Change-Id: I29f230e19c6f851b4b72b2fc8dd41f5abcba4631

2 files changed, 29 insertions, 1 deletions

diff --git a/core/java/android/hardware/input/InputManager.java b/core/java/android/hardware/input/InputManager.java
index 761faaf..30e69a6 100644
--- a/core/java/android/hardware/input/InputManager.java
+++ b/core/java/android/hardware/input/InputManager.java
@@ -579,15 +579,33 @@ public final class InputManager {
      * @hide
      */
     public boolean[] deviceHasKeys(int[] keyCodes) {
+        return deviceHasKeys(-1, keyCodes);
+    }
+
+    /**
+     * Queries the framework about whether any physical keys exist on the
+     * any keyboard attached to the device that are capable of producing the given
+     * array of key codes.
+     *
+     * @param id The id of the device to query.
+     * @param keyCodes The array of key codes to query.
+     * @return A new array of the same size as the key codes array whose elements are set to true
+     * if the given device could produce the corresponding key code at the same index in the key
+     * codes array.
+     *
+     * @hide
+     */
+    public boolean[] deviceHasKeys(int id, int[] keyCodes) {
         boolean[] ret = new boolean[keyCodes.length];
         try {
-            mIm.hasKeys(-1, InputDevice.SOURCE_ANY, keyCodes, ret);
+            mIm.hasKeys(id, InputDevice.SOURCE_ANY, keyCodes, ret);
         } catch (RemoteException e) {
             // no fallback; just return the empty array
         }
         return ret;
     }
 
+
     /**
      * Injects an input event into the event system on behalf of an application.
      * The synchronization mode determines whether the method blocks while waiting for
diff --git a/core/java/android/view/InputDevice.java b/core/java/android/view/InputDevice.java
index f43e4ab3..afc7b3e 100644
--- a/core/java/android/view/InputDevice.java
+++ b/core/java/android/view/InputDevice.java
@@ -574,6 +574,16 @@ public final class InputDevice implements Parcelable {
     }
 
     /**
+     * Gets whether the device is capable of producing the list of keycodes.
+     * @param keys The list of android keycodes to check for.
+     * @return An array of booleans where each member specifies whether the device is capable of
+     * generating the keycode given by the corresponding value at the same index in the keys array.
+     */
+    public boolean[] hasKeys(int... keys) {
+        return InputManager.getInstance().deviceHasKeys(mId, keys);
+    }
+
+    /**
      * Gets information about the range of values for a particular {@link MotionEvent} axis.
      * If the device supports multiple sources, the same axis may have different meanings
      * for each source.  Returns information about the first axis found for any source.