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