Notify when password quality is out of policy

Change-Id: Ibf387c6ab0e6e56dd3e70b9cfdb9f2f0a8f17fe9

Author: hex539

app/src/main/AndroidManifest.xml

@@ -24,6 +24,7 @@
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
     <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
     <application
             android:allowBackup="true"
@@ -102,6 +103,7 @@
             <intent-filter>
                 <action android:name="android.app.action.DEVICE_ADMIN_ENABLED"/>
                 <action android:name="android.app.action.PROFILE_PROVISIONING_COMPLETE"/>
+                <action android:name="android.intent.action.BOOT_COMPLETED"/>
             </intent-filter>
         </receiver>
 

app/src/main/java/com/afwsamples/testdpc/DeviceAdminReceiver.java

@@ -20,6 +20,9 @@
 import android.accounts.AccountManager;
 import android.annotation.TargetApi;
 import android.app.admin.DevicePolicyManager;
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
@@ -52,6 +55,24 @@
 public class DeviceAdminReceiver extends android.app.admin.DeviceAdminReceiver {
     private static final String TAG = "DeviceAdminReceiver";
 
+    public static final String ACTION_PASSWORD_REQUIREMENTS_CHANGED =
+            "com.afwsamples.testdpc.policy.PASSWORD_REQUIREMENTS_CHANGED";
+
+    private static final int CHANGE_PASSWORD_NOTIFICATION_ID = 101;
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        switch (intent.getAction()) {
+            case ACTION_PASSWORD_REQUIREMENTS_CHANGED:
+            case Intent.ACTION_BOOT_COMPLETED:
+                updatePasswordQualityNotification(context);
+                break;
+            default:
+               super.onReceive(context, intent);
+               break;
+        }
+    }
+
     @Override
     public void onProfileProvisioningComplete(Context context, Intent intent) {
         // Retreive the admin extras bundle, which we can use to determine the original context for
@@ -213,4 +234,30 @@ public String onChoosePrivateKeyAlias(Context context, Intent intent, int uid, U
     public static ComponentName getComponentName(Context context) {
         return new ComponentName(context.getApplicationContext(), DeviceAdminReceiver.class);
     }
+
+    @Override
+    public void onPasswordChanged(Context context, Intent intent) {
+        updatePasswordQualityNotification(context);
+    }
+
+    private static void updatePasswordQualityNotification(Context context) {
+        DevicePolicyManager devicePolicyManager = (DevicePolicyManager) context.getSystemService(
+                Context.DEVICE_POLICY_SERVICE);
+        NotificationManager nm = (NotificationManager)
+                context.getSystemService(Context.NOTIFICATION_SERVICE);
+
+        if (!devicePolicyManager.isActivePasswordSufficient()) {
+            Notification.Builder warn = new Notification.Builder(context)
+                    .setOngoing(true)
+                    .setSmallIcon(R.drawable.ic_launcher)
+                    .setTicker(context.getText(R.string.password_not_compliant_title))
+                    .setContentTitle(context.getText(R.string.password_not_compliant_title))
+                    .setContentText(context.getText(R.string.password_not_compliant_content))
+                    .setContentIntent(PendingIntent.getActivity(context, /*requestCode*/ -1,
+                            new Intent(DevicePolicyManager.ACTION_SET_NEW_PASSWORD), /*flags*/ 0));
+            nm.notify(CHANGE_PASSWORD_NOTIFICATION_ID, warn.getNotification());
+        } else {
+            nm.cancel(CHANGE_PASSWORD_NOTIFICATION_ID);
+        }
+    }
 }

app/src/main/java/com/afwsamples/testdpc/policy/keyguard/PasswordConstraintsFragment.java

@@ -20,6 +20,7 @@
 import android.app.admin.DevicePolicyManager;
 import android.content.ComponentName;
 import android.content.Context;
+import android.content.Intent;
 import android.os.Bundle;
 import android.text.Editable;
 import android.text.TextUtils;
@@ -153,13 +154,16 @@ public void onResume() {
         mMinUpperCase.setText(Integer.toString(mDpm.getPasswordMinimumUpperCase(mAdminComponent)));
         mMinSymbols.setText(Integer.toString(mDpm.getPasswordMinimumSymbols(mAdminComponent)));
         mMinNonLetter.setText(Integer.toString(mDpm.getPasswordMinimumNonLetter(mAdminComponent)));
+
+        sendPasswordChangedBroadcast();
     }
 
     @Override
     public void onCheckedChanged(RadioGroup view, int checkedId) {
         if (view == mQualityGroup) {
             mDpm.setPasswordQuality(mAdminComponent, checkedId);
         }
+        sendPasswordChangedBroadcast();
     }
 
     @Override
@@ -191,6 +195,7 @@ public void afterTextChanged(Editable editable) {
         } else if (editable == mMinNonLetter.getEditableText()) {
             mDpm.setPasswordMinimumNonLetter(mAdminComponent, value);
         }
+        sendPasswordChangedBroadcast();
     }
 
     @Override
@@ -207,4 +212,19 @@ private EditText findAndPrepareField(View root, final int id) {
         return field;
     }
 
+    /**
+     * Notify the admin receiver that something about the password has changed - in this context,
+     * a minimum password requirement policy.
+     *
+     * This has to be sent manually because the system server only sends broadcasts for changes to
+     * the actual password, not any of the constraints related it it.
+     *
+     * <p>May trigger a show/hide of the notification warning to change the password through
+     * Settings.
+     **/
+    private void sendPasswordChangedBroadcast() {
+        Intent changedIntent = new Intent(DeviceAdminReceiver.ACTION_PASSWORD_REQUIREMENTS_CHANGED);
+        changedIntent.setComponent(mAdminComponent);
+        getContext().sendBroadcast(changedIntent);
+    }
 }

app/src/main/res/values/strings.xml

@@ -476,6 +476,9 @@
     <string name="password_min_symbols">Minimum number of symbols:</string>
     <string name="password_min_nonletter">Minimum number of non-letters:</string>
 
+    <string name="password_not_compliant_title">Password is not compliant</string>
+    <string name="password_not_compliant_content">Touch to set a new lock screen password.</string>
+
     <!-- Strings for managing Settings -->
     <string name="settings_management_title">Settings management</string>
     <string name="stay_on_while_plugged_in">Keep the device on while plugged in</string>