Build a new FooterPreference UI.

- Create a new layout for footer prefs.
- Create a new FooterPreference type to use the layout
- Create a Mixin to create and add the pref to screen
- Create a new lifecycle observer type to invoke mixin at right time
- Switch SettingsPreferenceFragment to use footer mixin.
- Switch FingerprintSettings to use the new footer pref.

Bug: 33579394
Test: RunSettingsRoboTests
Change-Id: I548ac39a0d120196a7ffed09b4f98bd9a80bae90

tests/robotests/src/com/android/settings/widget/FooterPreferenceMixinTest.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.widget;
+
+import android.support.v14.preference.PreferenceFragment;
+import android.support.v7.preference.PreferenceManager;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.core.lifecycle.Lifecycle;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowApplication;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class FooterPreferenceMixinTest {
+
+    @Mock
+    private PreferenceFragment mFragment;
+    @Mock
+    private PreferenceScreen mScreen;
+
+    private Lifecycle mLifecycle;
+    private FooterPreferenceMixin mMixin;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mLifecycle = new Lifecycle();
+        when(mFragment.getPreferenceManager()).thenReturn(mock(PreferenceManager.class));
+        when(mFragment.getPreferenceManager().getContext())
+                .thenReturn(ShadowApplication.getInstance().getApplicationContext());
+        mMixin = new FooterPreferenceMixin(mFragment, mLifecycle);
+    }
+
+    @Test
+    public void createFooter_screenNotAvailable_noCrash() {
+        assertThat(mMixin.createFooterPreference()).isNotNull();
+    }
+
+    @Test
+    public void createFooter_screenAvailable_canAttachToScreen() {
+        when(mFragment.getPreferenceScreen()).thenReturn(mScreen);
+
+        final FooterPreference preference = mMixin.createFooterPreference();
+
+        assertThat(preference).isNotNull();
+        verify(mScreen).addPreference(preference);
+    }
+
+    @Test
+    public void createFooter_screenAvailableDelayed_canAttachToScreen() {
+        final FooterPreference preference = mMixin.createFooterPreference();
+
+        mLifecycle.setPreferenceScreen(mScreen);
+
+        assertThat(preference).isNotNull();
+        verify(mScreen).addPreference(preference);
+    }
+
+    @Test
+    public void createFooterTwice_screenAvailable_replaceOldFooter() {
+        when(mFragment.getPreferenceScreen()).thenReturn(mScreen);
+
+        mMixin.createFooterPreference();
+        mMixin.createFooterPreference();
+
+        verify(mScreen).removePreference(any(FooterPreference.class));
+        verify(mScreen, times(2)).addPreference(any(FooterPreference.class));
+    }
+
+}

tests/robotests/src/com/android/settings/widget/FooterPreferenceTest.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.widget;
+
+import android.content.Context;
+import android.support.v7.preference.PreferenceViewHolder;
+import android.text.method.LinkMovementMethod;
+import android.view.LayoutInflater;
+import android.widget.TextView;
+
+import com.android.settings.R;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowApplication;
+
+import static com.google.common.truth.Truth.assertThat;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class FooterPreferenceTest {
+
+    private Context mContext;
+
+    @Before
+    public void setUp() {
+        mContext = ShadowApplication.getInstance().getApplicationContext();
+    }
+
+    @Test
+    public void createNewPreference_shouldSetKeyAndOrder() {
+        final FooterPreference preference = new FooterPreference(mContext);
+
+        assertThat(preference.getKey()).isEqualTo(FooterPreference.KEY_FOOTER);
+        assertThat(preference.getOrder()).isEqualTo(FooterPreference.ORDER_FOOTER);
+    }
+
+    @Test
+    public void bindPreference_shouldLinkifyContent() {
+        final FooterPreference preference = new FooterPreference(mContext);
+        final PreferenceViewHolder holder = new PreferenceViewHolder(
+                LayoutInflater.from(mContext).inflate(R.layout.preference_footer, null));
+
+        preference.onBindViewHolder(holder);
+        assertThat(((TextView) holder.findViewById(android.R.id.title)).getMovementMethod())
+                .isInstanceOf(LinkMovementMethod.class);
+    }
+}

tests/robotests/src/com/android/settings/widget/RingProgressBarTest.java

@@ -16,21 +16,21 @@
 
 package com.android.settings.widget;
 
-import static junit.framework.Assert.assertEquals;
-
 import android.content.Context;
 import android.view.View.MeasureSpec;
 
+import com.android.settings.SettingsRobolectricTestRunner;
 import com.android.settings.TestConfig;
 
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 
-@RunWith(RobolectricTestRunner.class)
+import static junit.framework.Assert.assertEquals;
+
+@RunWith(SettingsRobolectricTestRunner.class)
 @Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
 public class RingProgressBarTest {