packages/Keyguard/src/com/android/keyguard/KeyguardSecurityViewHelper.java

   1 /*
   2  * Copyright (C) 2012 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package com.android.keyguard;
  18
  19 import android.animation.Animator;
  20 import android.animation.AnimatorListenerAdapter;
  21 import android.animation.ObjectAnimator;
  22 import android.graphics.drawable.Drawable;
  23 import android.view.View;
  24
  25 /**
  26  * Some common functions that are useful for KeyguardSecurityViews.
  27  */
  28 public class KeyguardSecurityViewHelper {
  29
  30     public static void showBouncer(SecurityMessageDisplay securityMessageDisplay,
  31             final View ecaView, Drawable bouncerFrame, int duration) {
  32         if (securityMessageDisplay != null) {
  33             securityMessageDisplay.showBouncer(duration);
  34         }
  35         if (ecaView != null) {
  36             if (duration > 0) {
  37                 Animator anim = ObjectAnimator.ofFloat(ecaView, "alpha", 0f);
  38                 anim.setDuration(duration);
  39                 anim.addListener(new AnimatorListenerAdapter() {
  40                     private boolean mCanceled;
  41                     @Override
  42                     public void onAnimationCancel(Animator animation) {
  43                         // Fail safe and show the emergency button in onAnimationEnd()
  44                         mCanceled = true;
  45                         ecaView.setAlpha(1f);
  46                     }
  47                     @Override
  48                     public void onAnimationEnd(Animator animation) {
  49                         ecaView.setVisibility(mCanceled ? View.VISIBLE : View.INVISIBLE);
  50                     }
  51                 });
  52                 anim.start();
  53             } else {
  54                 ecaView.setAlpha(0f);
  55                 ecaView.setVisibility(View.INVISIBLE);
  56             }
  57         }
  58         if (bouncerFrame != null) {
  59             if (duration > 0) {
  60                 Animator anim = ObjectAnimator.ofInt(bouncerFrame, "alpha", 0, 255);
  61                 anim.setDuration(duration);
  62                 anim.start();
  63             } else {
  64                 bouncerFrame.setAlpha(255);
  65             }
  66         }
  67     }
  68
  69     public static void hideBouncer(SecurityMessageDisplay securityMessageDisplay,
  70             View ecaView, Drawable bouncerFrame, int duration) {
  71         if (securityMessageDisplay != null) {
  72             securityMessageDisplay.hideBouncer(duration);
  73         }
  74         if (ecaView != null) {
  75             ecaView.setVisibility(View.VISIBLE);
  76             if (duration > 0) {
  77                 Animator anim = ObjectAnimator.ofFloat(ecaView, "alpha", 1f);
  78                 anim.setDuration(duration);
  79                 anim.start();
  80             } else {
  81                 ecaView.setAlpha(1f);
  82             }
  83         }
  84         if (bouncerFrame != null) {
  85             if (duration > 0) {
  86                 Animator anim = ObjectAnimator.ofInt(bouncerFrame, "alpha", 255, 0);
  87                 anim.setDuration(duration);
  88                 anim.start();
  89             } else {
  90                 bouncerFrame.setAlpha(0);
  91             }
  92         }
  93     }
  94 }