Add API to find out if there is a vibrator.

Change-Id: If29f6ee19448222433cad9fad325d0095a8e5737

2 files changed, 11 insertions, 0 deletions

diff --git a/services/java/com/android/server/VibratorService.java b/services/java/com/android/server/VibratorService.java
index f0b5955..2fcdb5d 100755
--- a/services/java/com/android/server/VibratorService.java
+++ b/services/java/com/android/server/VibratorService.java
@@ -112,6 +112,10 @@ public class VibratorService extends IVibratorService.Stub {
         context.registerReceiver(mIntentReceiver, filter);
     }
 
+    public boolean hasVibrator() {
+        return vibratorExists();
+    }
+    
     public void vibrate(long milliseconds, IBinder token) {
         if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.VIBRATE)
                 != PackageManager.PERMISSION_GRANTED) {
@@ -380,6 +384,7 @@ public class VibratorService extends IVibratorService.Stub {
 
     volatile VibrateThread mThread;
 
+    native static boolean vibratorExists();
     native static void vibratorOn(long milliseconds);
     native static void vibratorOff();
 }
diff --git a/services/jni/com_android_server_VibratorService.cpp b/services/jni/com_android_server_VibratorService.cpp
index 6ec5c07..0912d43 100644
--- a/services/jni/com_android_server_VibratorService.cpp
+++ b/services/jni/com_android_server_VibratorService.cpp
@@ -29,6 +29,11 @@
 namespace android
 {
 
+static jboolean vibratorExists(JNIEnv *env, jobject clazz)
+{
+    return vibrator_exists() > 0 ? JNI_TRUE : JNI_FALSE;
+}
+
 static void vibratorOn(JNIEnv *env, jobject clazz, jlong timeout_ms)
 {
     // LOGI("vibratorOn\n");
@@ -42,6 +47,7 @@ static void vibratorOff(JNIEnv *env, jobject clazz)
 }
 
 static JNINativeMethod method_table[] = {
+    { "vibratorExists", "()Z", (void*)vibratorExists },
     { "vibratorOn", "(J)V", (void*)vibratorOn },
     { "vibratorOff", "()V", (void*)vibratorOff }
 };