Update screen pinning state whenever it changes.

Change-Id: I98f0a7b0afcc76bcf822786e6cf3ea37004db1a8
Fixes: 71845181
Test: robotests

src/com/android/settings/security/ScreenPinningPreferenceController.java

@@ -19,7 +19,6 @@ package com.android.settings.security;
 import android.content.Context;
 import android.provider.Settings;
 import android.support.v7.preference.Preference;
-import android.support.v7.preference.PreferenceScreen;
 
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
@@ -38,19 +37,16 @@ public class ScreenPinningPreferenceController extends BasePreferenceController
     }
 
     @Override
-    public void displayPreference(PreferenceScreen screen) {
+    public String getSummary() {
-        super.displayPreference(screen);
+        return Settings.System.getInt(mContext.getContentResolver(),
-        final Preference preference = screen.findPreference(getPreferenceKey());
+                Settings.System.LOCK_TO_APP_ENABLED, 0) != 0
-        if (preference == null) {
+                ? mContext.getString(R.string.switch_on_text)
-            return;
+                : mContext.getString(R.string.switch_off_text);
-        }
-        if (Settings.System.getInt(mContext.getContentResolver(),
-                Settings.System.LOCK_TO_APP_ENABLED, 0) != 0) {
-            preference.setSummary(
-                    mContext.getString(R.string.switch_on_text));
-        } else {
-            preference.setSummary(
-                    mContext.getString(R.string.switch_off_text));
     }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        preference.setSummary(getSummary());
     }
 }

tests/robotests/src/com/android/settings/security/ScreenPinningPreferenceControllerTest.java

@@ -18,23 +18,19 @@ package com.android.settings.security;
 
 import static com.android.settings.core.BasePreferenceController.AVAILABLE;
 import static com.google.common.truth.Truth.assertThat;
-import static org.mockito.Mockito.when;
 
 import android.content.Context;
 import android.provider.Settings;
 import android.support.v7.preference.Preference;
-import android.support.v7.preference.PreferenceScreen;
 
 import com.android.settings.R;
 import com.android.settings.TestConfig;
-import com.android.settings.testutils.FakeFeatureFactory;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
@@ -43,10 +39,6 @@ import org.robolectric.annotation.Config;
 @Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
 public class ScreenPinningPreferenceControllerTest {
 
-    @Mock
-    private PreferenceScreen mScreen;
-
-    private FakeFeatureFactory mFeatureFactory;
     private Context mContext;
     private ScreenPinningPreferenceController mController;
     private Preference mPreference;
@@ -55,12 +47,9 @@ public class ScreenPinningPreferenceControllerTest {
     public void setUp() {
         MockitoAnnotations.initMocks(this);
         mContext = RuntimeEnvironment.application;
-        mFeatureFactory = FakeFeatureFactory.setupForTest();
         mController = new ScreenPinningPreferenceController(mContext);
         mPreference = new Preference(mContext);
         mPreference.setKey(mController.getPreferenceKey());
-        when(mScreen.findPreference(mController.getPreferenceKey()))
-                .thenReturn(mPreference);
     }
 
     @After
@@ -75,22 +64,22 @@ public class ScreenPinningPreferenceControllerTest {
     }
 
     @Test
-    public void displayPreference_isOff_shouldDisableOffSummary() {
+    public void updateState_isOff_shouldDisableOffSummary() {
         Settings.System.putInt(mContext.getContentResolver(),
                 Settings.System.LOCK_TO_APP_ENABLED, 0);
 
-        mController.displayPreference(mScreen);
+        mController.updateState(mPreference);
 
         assertThat(mPreference.getSummary())
                 .isEqualTo(mContext.getString(R.string.switch_off_text));
     }
 
     @Test
-    public void displayPreference_isOn_shouldDisableOnSummary() {
+    public void updateState_isOn_shouldDisableOnSummary() {
         Settings.System.putInt(mContext.getContentResolver(),
                 Settings.System.LOCK_TO_APP_ENABLED, 1);
 
-        mController.displayPreference(mScreen);
+        mController.updateState(mPreference);
 
         assertThat(mPreference.getSummary())
                 .isEqualTo(mContext.getString(R.string.switch_on_text));