src/com/owncloud/android/authentication/PassCodeManager.java

   1 package com.owncloud.android.authentication;
   2
   3 import android.app.Activity;
   4 import android.content.Context;
   5 import android.content.Intent;
   6 import android.content.SharedPreferences;
   7 import android.os.PowerManager;
   8 import android.preference.PreferenceManager;
   9 import android.view.View;
  10 import android.view.WindowManager;
  11
  12 import com.owncloud.android.MainApp;
  13 import com.owncloud.android.ui.activity.PinCodeActivity;
  14
  15 import java.util.HashSet;
  16 import java.util.Set;
  17
  18 public class PassCodeManager {
  19
  20     private static final Set<Class> sExemptOfPasscodeActivites;
  21
  22     static {
  23         sExemptOfPasscodeActivites = new HashSet<Class>();
  24         sExemptOfPasscodeActivites.add(PinCodeActivity.class);
  25         // other activities may be exempted, if needed
  26     }
  27
  28     private static int PASS_CODE_TIMEOUT = 1000;
  29         // keeping a "low" positive value is the easiest way to prevent the pass code is requested on rotations
  30
  31     public static PassCodeManager mPassCodeManagerInstance = null;
  32
  33     public static PassCodeManager getPassCodeManager() {
  34         if (mPassCodeManagerInstance == null) {
  35             mPassCodeManagerInstance = new PassCodeManager();
  36         }
  37         return mPassCodeManagerInstance;
  38     }
  39
  40     private Long mTimestamp = 0l;
  41     private int mVisibleActivitiesCounter = 0;
  42
  43     protected PassCodeManager() {};
  44
  45     public void onActivityCreated(Activity activity) {
  46         if (passCodeIsEnabled()) {
  47             activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
  48         } else {
  49             activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
  50         }
  51     }
  52
  53     public void onActivityStarted(Activity activity) {
  54         if (!sExemptOfPasscodeActivites.contains(activity.getClass()) &&
  55                 passCodeShouldBeRequested()
  56                 ){
  57
  58             Intent i = new Intent(MainApp.getAppContext(), PinCodeActivity.class);
  59             i.setAction(PinCodeActivity.ACTION_REQUEST);
  60             i.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
  61             activity.startActivity(i);
  62
  63         }
  64
  65         mVisibleActivitiesCounter++;    // keep it AFTER passCodeShouldBeRequested was checked
  66     }
  67
  68     public void onActivityStopped(Activity activity) {
  69         if (mVisibleActivitiesCounter > 0) {
  70             mVisibleActivitiesCounter--;
  71         }
  72         setUnlockTimestamp();
  73         PowerManager powerMgr = (PowerManager) activity.getSystemService(Context.POWER_SERVICE);
  74         if (passCodeIsEnabled() && powerMgr != null && !powerMgr.isScreenOn()) {
  75             activity.moveTaskToBack(true);
  76         }
  77     }
  78
  79     private void setUnlockTimestamp() {
  80         mTimestamp = System.currentTimeMillis();
  81     }
  82
  83     private boolean passCodeShouldBeRequested(){
  84         if ((System.currentTimeMillis() - mTimestamp) > PASS_CODE_TIMEOUT &&
  85                 mVisibleActivitiesCounter <= 0
  86                 ){
  87             return passCodeIsEnabled();
  88         }
  89         return false;
  90     }
  91
  92     private boolean passCodeIsEnabled() {
  93         SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(MainApp.getAppContext());
  94         return (appPrefs.getBoolean("set_pincode", false));
  95     }
  96
  97 }