First commit for settings panels

Establish the Activity which hosts Settings panels through the
PanelFragment. The Activity's purpose is to validate the intent
data coming in, including:
- Called with startActivityForResult (so we can log who is calling)
- Intent has the proper intent extra to link to a Panel

The fragment takes the Panelable data and builds a Settings Panel.
Each panel will have:
- Title
- List of Slices
- Link to underlying content

The Panelable interface is created to provide all of those datums, and
the new FetureProvider provides the Panelables by linking them with
keys. The keys will eventually become public APIs with CTS tests.For
now, we store them locally.

I included an exmaple panel, the InternetConnectivityPanel which
currently shows Wifi and Airplane mode.

Screenshot: https://screenshot.googleplex.com/c6sv7ZzQ5OJ
Bug: 117804089
Test: make -j40 RunSettingsRobotest
Test: Manual app
Change-Id: I1932f7179cc32088acd6413a736901ddf9651892

src/com/android/settings/panel/InternetConnectivityPanel.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2018 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.panel;
+
+import androidx.annotation.VisibleForTesting;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.provider.SettingsSlicesContract;
+
+import com.android.settings.R;
+import com.android.settings.wifi.WifiSlice;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Represents the Internet Connectivity Panel.
+ *
+ * <p>
+ *     Displays Wifi (full Slice) and Airplane mode.
+ * </p>
+ */
+public class InternetConnectivityPanel implements PanelContent {
+
+    @VisibleForTesting
+    static final Uri AIRPLANE_URI = new Uri.Builder()
+            .scheme(ContentResolver.SCHEME_CONTENT)
+            .authority(SettingsSlicesContract.AUTHORITY)
+            .appendPath(SettingsSlicesContract.PATH_SETTING_ACTION)
+            .appendPath(SettingsSlicesContract.KEY_AIRPLANE_MODE)
+            .build();
+
+    private final Context mContext;
+
+    public static InternetConnectivityPanel create(Context context) {
+        return new InternetConnectivityPanel(context);
+    }
+
+    private InternetConnectivityPanel(Context context) {
+        mContext = context.getApplicationContext();
+    }
+
+    @Override
+    public String getTitle() {
+        return (String) mContext.getText(R.string.internet_connectivity_panel_title);
+    }
+
+    @Override
+    public List<Uri> getSlices() {
+        final List<Uri> uris = new ArrayList<>();
+        uris.add(WifiSlice.WIFI_URI);
+        uris.add(AIRPLANE_URI);
+        return uris;
+    }
+
+    @Override
+    public Intent getSeeMoreIntent() {
+        return null;
+    }
+}

src/com/android/settings/panel/PanelContent.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2018 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.panel;
+
+import android.content.Intent;
+import android.net.Uri;
+
+import java.util.List;
+
+/**
+ * Represents the data class needed to create a Settings Panel. See {@link PanelFragment}.
+ */
+public interface PanelContent {
+
+    /**
+     * @return a string for the title of the Panel.
+     */
+    CharSequence getTitle();
+
+    /**
+     * @return an ordered list of the Slices to be displayed in the Panel. The first item in the
+     * list is shown on top of the Panel.
+     */
+    List<Uri> getSlices();
+
+
+    /**
+     * @return an {@link Intent} to the full content in Settings that is summarized by the Panel.
+     *
+     * <p>
+     *     For example, for the connectivity panel you would intent to the Network & Internet page.
+     * </p>
+     */
+    Intent getSeeMoreIntent();
+}

src/com/android/settings/panel/PanelFeatureProvider.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2018 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.panel;
+
+import android.content.Context;
+
+public interface PanelFeatureProvider {
+
+    /**
+     * Returns {@link PanelContent} as specified by the {@param panelType}.
+     */
+    PanelContent getPanel(Context context, String panelType);
+}

src/com/android/settings/panel/PanelFeatureProviderImpl.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2018 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.panel;
+
+import android.content.Context;
+
+public class PanelFeatureProviderImpl implements PanelFeatureProvider {
+
+    @Override
+    public PanelContent getPanel(Context context, String panelType) {
+        switch (panelType) {
+            case SettingsPanelActivity.PANEL_TYPE_WIFI:
+                return InternetConnectivityPanel.create(context);
+        }
+
+        throw new IllegalStateException("No matching panel for: "  + panelType);
+    }
+}

src/com/android/settings/panel/PanelFragment.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2018 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.panel;
+
+import android.net.Uri;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import android.widget.LinearLayout;
+
+import androidx.lifecycle.LiveData;
+import androidx.slice.Slice;
+import androidx.slice.widget.SliceLiveData;
+import androidx.slice.widget.SliceView;
+
+import com.android.settings.R;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+
+import com.android.settings.overlay.FeatureFactory;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PanelFragment extends Fragment {
+
+    private static final String TAG = "PanelFragment";
+
+    private List<SliceView> mSliceViewList;
+    private List<LiveData<Slice>> mSliceDataList;
+    private LinearLayout mPanelLayout;
+
+    public PanelFragment() {
+        mSliceViewList = new ArrayList<>();
+        mSliceDataList = new ArrayList<>();
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState) {
+        final FragmentActivity activity = getActivity();
+        final View view = inflater.inflate(R.layout.panel_layout, container, false);
+
+        mPanelLayout = view.findViewById(R.id.panel_parent_layout);
+        final Bundle arguments = getArguments();
+
+        final String panelType = arguments.getString(SettingsPanelActivity.KEY_PANEL_TYPE_ARGUMENT);
+
+        final PanelContent panel = FeatureFactory.getFactory(activity)
+                .getPanelFeatureProvider()
+                .getPanel(activity, panelType);
+
+        activity.setTitle(panel.getTitle());
+
+
+        for (Uri uri : panel.getSlices()) {
+            final SliceView sliceView = new SliceView(activity);
+            mPanelLayout.addView(sliceView);
+            final LiveData<Slice> liveData = SliceLiveData.fromUri(activity, uri);
+            liveData.observe(this /* lifecycleOwner */, sliceView);
+
+            mSliceDataList.add(liveData);
+            mSliceViewList.add(sliceView);
+        }
+
+        return view;
+    }
+}

src/com/android/settings/panel/SettingsPanelActivity.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2018 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.panel;
+
+import android.content.ComponentName;
+import android.content.Intent;
+import android.os.Bundle;
+
+import android.text.TextUtils;
+import android.util.Log;
+import android.view.Gravity;
+import android.view.Window;
+import android.view.WindowManager;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentManager;
+
+import com.android.settings.R;
+
+/**
+ * Dialog Activity to host Settings Slices.
+ *
+ * TODO link to action / framework API
+ */
+public class SettingsPanelActivity extends FragmentActivity {
+
+    private final String TAG = "panel_activity";
+
+    /**
+     * Key specifying which Panel the app is requesting.
+     */
+    public static final String KEY_PANEL_TYPE_ARGUMENT = "PANEL_TYPE_ARGUMENT";
+
+
+    // TODO (b/117804442) move to framework
+    public static final String EXTRA_PANEL_TYPE = "com.android.settings.panel.extra";
+
+    // TODO (b/117804442) move to framework
+    public static final String PANEL_TYPE_WIFI = "wifi_panel";
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        final ComponentName callingActivityName = getCallingActivity();
+
+        if (callingActivityName == null) {
+            Log.e(TAG, "Must start with startActivityForResult. Closing.");
+            finish();
+            return;
+        }
+
+        final Intent callingIntent = getIntent();
+        if (callingIntent == null) {
+            Log.e(TAG, "Null intent, closing Panel Activity");
+            finish();
+            return;
+        }
+
+        final String typeExtra = callingIntent.getStringExtra(EXTRA_PANEL_TYPE);
+        if (TextUtils.isEmpty(typeExtra)) {
+            Log.e(TAG, "No intent passed, closing Panel Activity");
+            return;
+        }
+
+        setContentView(R.layout.settings_panel);
+
+        // Move the window to the bottom of screen, and make it take up the entire screen width.
+        final Window window = getWindow();
+        window.setGravity(Gravity.BOTTOM);
+        window.setLayout(WindowManager.LayoutParams.MATCH_PARENT,
+                WindowManager.LayoutParams.WRAP_CONTENT);
+
+
+        final Bundle bundle = new Bundle();
+        bundle.putString(KEY_PANEL_TYPE_ARGUMENT, typeExtra);
+
+        final PanelFragment panelFragment = new PanelFragment();
+        panelFragment.setArguments(bundle);
+
+        final FragmentManager fragmentManager = getSupportFragmentManager();
+        final Fragment fragment = fragmentManager.findFragmentById(R.id.main_content);
+        if (fragment == null) {
+            fragmentManager.beginTransaction().add(R.id.main_content, panelFragment).commit();
+        }
+    }
+}