Set Wi-Fi DPP fragment icons.

1. set fragment icon for WifiDppChooseSavedWifiNetworkFragment
2. set fragment icon of success for WifiDppAddDeviceFragment

All Wi-Fi DPP fragment icons are VectorDrawable of instinct size
24dp draw on a 48dp canvas. Except for ic_devices_check_circle_green,
it's a LayerDrawable of different size. I dynamically change ImageView
layout width & height between these 2 different kind of drawable.

Bug: 122982132
Test: manual test
Change-Id: Idab8cd8b0798363e447da00dc6bc68a86498b8be

res/drawable/ic_devices_check_circle_green.xml

@@ -0,0 +1,30 @@
+<!--
+    Copyright (C) 2019 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.
+-->
+<layer-list
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:drawable="@drawable/ic_devices_other_opaque_black"
+        android:width="@dimen/wifi_dpp_fragment_icon_width_height"
+        android:height="@dimen/wifi_dpp_fragment_icon_width_height"
+        android:gravity="center"/>
+
+    <item
+        android:drawable="@drawable/ic_check_circle_green"
+        android:top="28dp"
+        android:left="44dp"
+        android:gravity="center"/>
+
+</layer-list>

res/layout/wifi_dpp_fragment_header.xml

@@ -28,8 +28,16 @@
 
     <ImageView
         android:id="@android:id/icon"
-        android:layout_width="48dp"
+        android:layout_width="@dimen/wifi_dpp_fragment_icon_width_height"
-        android:layout_height="48dp"
+        android:layout_height="@dimen/wifi_dpp_fragment_icon_width_height"
+        android:scaleType="fitCenter"/>
+
+    <!-- Special header icon only for ic_devices_check_circle_green -->
+    <ImageView
+        android:id="@+id/devices_check_circle_green_icon"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@drawable/ic_devices_check_circle_green"
         android:scaleType="fitCenter"/>
 
     <TextView

res/values/dimens.xml

@@ -385,6 +385,9 @@
     <dimen name="qrcode_size">264dp</dimen>
     <dimen name="qrcode_preview_size">360dp</dimen>
 
+    <!-- Wi-Fi DPP fragment icon size -->
+    <dimen name="wifi_dpp_fragment_icon_width_height">48dp</dimen>
+
     <!-- Height for slice preference, which contains 6 items at most -->
     <dimen name="slice_preference_group_height">360dp</dimen>
 </resources>

src/com/android/settings/wifi/dpp/WifiDppAddDeviceFragment.java

@@ -55,7 +55,7 @@ public class WifiDppAddDeviceFragment extends WifiDppQrCodeBaseFragment {
         @Override
         public void onConfiguratorSuccess(int code) {
             // Update success UI.
-            mHeaderIcon.setImageResource(R.drawable.ic_check_circle_green);
+            setHeaderIconImageResource(R.drawable.ic_devices_check_circle_green);
             mTitle.setText(R.string.wifi_dpp_wifi_shared_with_device);
             mSummary.setVisibility(View.INVISIBLE);
             mWifiApPictureView.setImageResource(R.drawable.wifi_dpp_success);
@@ -110,7 +110,7 @@ public class WifiDppAddDeviceFragment extends WifiDppQrCodeBaseFragment {
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        mHeaderIcon.setImageResource(R.drawable.ic_devices_other_opaque_black);
+        setHeaderIconImageResource(R.drawable.ic_devices_other_opaque_black);
 
         final WifiQrCode wifiQrCode = ((WifiDppConfiguratorActivity) getActivity())
                 .getWifiDppQrCode();

src/com/android/settings/wifi/dpp/WifiDppChooseSavedWifiNetworkFragment.java

@@ -82,6 +82,8 @@ public class WifiDppChooseSavedWifiNetworkFragment extends WifiDppQrCodeBaseFrag
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
+        setHeaderIconImageResource(R.drawable.ic_wifi_signal_4);
+
         mTitle.setText(R.string.wifi_dpp_choose_network);
         mSummary.setText(R.string.wifi_dpp_choose_network_to_connect_device);
 

src/com/android/settings/wifi/dpp/WifiDppQrCodeBaseFragment.java

@@ -21,6 +21,7 @@ import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import com.android.settings.R;
 import com.android.settings.core.InstrumentedFragment;
 
 /**
@@ -33,7 +34,8 @@ import com.android.settings.core.InstrumentedFragment;
  * {@code WifiDppAddDeviceFragment}
  */
 public abstract class WifiDppQrCodeBaseFragment extends InstrumentedFragment {
-    protected ImageView mHeaderIcon;
+    private ImageView mHeaderIcon;
+    private ImageView mDevicesCheckCircleGreenHeaderIcon;
     protected TextView mTitle;
     protected TextView mSummary;
 
@@ -42,7 +44,22 @@ public abstract class WifiDppQrCodeBaseFragment extends InstrumentedFragment {
         super.onViewCreated(view, savedInstanceState);
 
         mHeaderIcon = view.findViewById(android.R.id.icon);
+        mDevicesCheckCircleGreenHeaderIcon =
+                view.findViewById(R.id.devices_check_circle_green_icon);
         mTitle = view.findViewById(android.R.id.title);
         mSummary = view.findViewById(android.R.id.summary);
     }
+
+    protected void setHeaderIconImageResource(int resId) {
+        // ic_devices_check_circle_green is a LayerDrawable,
+        // it has different size from other VectorDrawable icons
+        if (resId == R.drawable.ic_devices_check_circle_green) {
+            mHeaderIcon.setVisibility(View.GONE);
+            mDevicesCheckCircleGreenHeaderIcon.setVisibility(View.VISIBLE);
+        } else {
+            mDevicesCheckCircleGreenHeaderIcon.setVisibility(View.GONE);
+            mHeaderIcon.setImageResource(resId);
+            mHeaderIcon.setVisibility(View.VISIBLE);
+        }
+    }
 }

src/com/android/settings/wifi/dpp/WifiDppQrCodeGeneratorFragment.java

@@ -124,7 +124,8 @@ public class WifiDppQrCodeGeneratorFragment extends WifiDppQrCodeBaseFragment {
 
         mQrCodeView = view.findViewById(R.id.qrcode_view);
 
-        mHeaderIcon.setImageResource(R.drawable.ic_qrcode_24dp);
+        setHeaderIconImageResource(R.drawable.ic_qrcode_24dp);
+
         final WifiNetworkConfig wifiNetworkConfig = getWifiNetworkConfigFromHostActivity();
         mTitle.setText(R.string.wifi_dpp_share_wifi);
         mSummary.setText(getString(R.string.wifi_dpp_scan_qr_code_with_another_device,

src/com/android/settings/wifi/dpp/WifiDppQrCodeScannerFragment.java

@@ -171,7 +171,7 @@ public class WifiDppQrCodeScannerFragment extends WifiDppQrCodeBaseFragment impl
 
         mDecorateView = (QrDecorateView) view.findViewById(R.id.decorate_view);
 
-        mHeaderIcon.setImageResource(R.drawable.ic_scan_24dp);
+        setHeaderIconImageResource(R.drawable.ic_scan_24dp);
         if (mIsConfiguratorMode) {
             mTitle.setText(R.string.wifi_dpp_add_device_to_network);