所有的View设置可点击震动

代码路径

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/frameworks/base/core/java/android/view/View.java
  1. 导包
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import android.os.Vibrator;
import android.provider.Settings;
  1. 声明变量
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private Vibrator mVibrator;
  1. 获取服务
    在View的构造方法里获取
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  /**
   * Simple constructor to use when creating a view from code.
   *
   * @param context The Context the view is running in, through which it can
   *        access the current theme, resources, etc.
   */
  public View(Context context) {
      mContext = context;
      mResources = context != null ? context.getResources() : null;
      mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED;
      // Set some flags defaults
      mPrivateFlags2 =
              (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) |
              (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) |
              (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) |
              (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) |
              (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) |
              (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT);
      mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
      setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS);
      mUserPaddingStart = UNDEFINED_PADDING;
      mUserPaddingEnd = UNDEFINED_PADDING;
      mRenderNode = RenderNode.create(getClass().getName(), this);

      if (!sCompatibilityDone && context != null) {
          final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion;

          // Older apps may need this compatibility hack for measurement.
          sUseBrokenMakeMeasureSpec = targetSdkVersion <= JELLY_BEAN_MR1;

          // Older apps expect onMeasure() to always be called on a layout pass, regardless
          // of whether a layout was requested on that View.
          sIgnoreMeasureCache = targetSdkVersion < KITKAT;

          sCompatibilityDone = true;
}
	/** add for view 触摸时震动 start **/
	 mVibrator = (Vibrator) mContext.getSystemService(Context.VIBRATOR_SERVICE);
	// end add
  }

  1. 触发震动
    在playSoundEffect() 函数触发
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  /**
   * Play a sound effect for this view.
   *
   * <p>The framework will play sound effects for some built in actions, such as
   * clicking, but you may wish to play these effects in your widget,
   * for instance, for internal navigation.
   *
   * <p>The sound effect will only be played if sound effects are enabled by the user, and
   * {@link #isSoundEffectsEnabled()} is true.
   *
   * @param soundConstant One of the constants defined in {@link SoundEffectConstants}
   */
  public void playSoundEffect(int soundConstant) {
      if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) {
          return;
      }
/** add for view 触摸时震动 start **/
     boolean vibratorEnabled = Settings.System.getInt(mContext.getContentResolver(),Settings.System.HAPTIC_FEEDBACK_ENABLED,1)==1;
     if(mVibrator !=null && vibratorEnabled ){
             try {
                 mVibrator.vibrate(50);
             } catch (Exception e) {
                 android.util.Log.v("View","Exception"+e.toString());
             }
     }
     // end add

      mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant);
  }