add VibrateUtils comment

Author: simplepeng

feature/utilcode/pkg/src/main/java/com/blankj/utilcode/pkg/feature/vibrate/VibrateActivity.kt

@@ -41,6 +41,7 @@ class VibrateActivity : CommonActivity() {
                 CommonItemClick(R.string.vibrate_background) {
                     backHome()
                     mContentView.postDelayed({
+//                        VibrateUtils.vibrate(1000) -- can not vibrate in background
                         VibrateUtils.vibrateCompat(longArrayOf(0, 1000, 1000, 2000, 2000, 1000), 1)
 //                        VibrateUtils.vibrateCompat(1000)
                     }, 1000)

lib/utilcode/src/main/java/com/blankj/utilcode/util/VibrateUtils.java

@@ -58,7 +58,7 @@ public static void vibrate(final long milliseconds, AudioAttributes attributes)
     }
 
     /**
-     * VibrateCompat
+     * VibrateCompat - Can vibrate in background
      * <p>Must hold {@code <uses-permission android:name="android.permission.VIBRATE" />}</p>
      *
      * @param milliseconds he number of milliseconds to vibrate.
@@ -106,7 +106,7 @@ public static void vibrate(final long[] pattern, final int repeat, AudioAttribut
     }
 
     /**
-     * VibrateCompat
+     * VibrateCompat - Can vibrate in background
      * <p>Must hold {@code <uses-permission android:name="android.permission.VIBRATE" />}</p>
      *
      * @param pattern An array of longs of times for which to turn the vibrator on or off.