Upload basic UI files for Wi-Fi DPP Settings development.

WifiDppQrCodeScannerActivity is the activity for user to scan
QR code and add device to a saved network.

Bug: 118797380
Test: manual
Change-Id: If2c8c5ba1620e5584fb47ba7b0ea2bc2d7acb641

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

@@ -0,0 +1,107 @@
+/*
+ * 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.wifi.dpp;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.SurfaceView;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.android.internal.logging.nano.MetricsProto;
+
+import com.android.settings.core.InstrumentedFragment;
+import com.android.settings.R;
+
+public abstract class WifiDppQrCodeBaseFragment extends InstrumentedFragment {
+    private TextView mTitle;
+    private TextView mDescription;
+    private SurfaceView mPreviewView;
+    private TextView mErrorMessage; //optional, view used to surface connectivity errors to the user
+    private Button mButtonLeft;
+    private Button mButtonRight;
+
+    abstract protected int getLayout();
+
+    @Override
+    public int getMetricsCategory() {
+        //TODO:Should we use a new metrics category for Wi-Fi DPP?
+        return MetricsProto.MetricsEvent.WIFI_NETWORK_DETAILS;
+    }
+
+    @Override
+    public final void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public final View onCreateView(LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState) {
+        View view = inflater.inflate(getLayout(), container, false);
+        initView(view);
+        return view;
+    }
+
+    private void initView(View view) {
+        mTitle = view.findViewById(R.id.title);
+        mDescription = view.findViewById(R.id.description);
+        mPreviewView = view.findViewById(R.id.preview_view);
+        mErrorMessage = view.findViewById(R.id.error_message);
+        mButtonLeft = view.findViewById(R.id.button_left);
+        mButtonRight = view.findViewById(R.id.button_right);
+    }
+
+    protected void setTitle(String title) {
+        mTitle.setText(title);
+    }
+
+    protected void setDescription(String description) {
+        mDescription.setText(description);
+    }
+
+    protected void setErrorMessage(String errorMessage) {
+        if (mErrorMessage != null) {
+            mErrorMessage.setText(errorMessage);
+        }
+    }
+
+    protected void setLeftButtonText(String text) {
+        mButtonLeft.setText(text);
+    }
+
+    protected void setRightButtonText(String text) {
+        mButtonRight.setText(text);
+    }
+
+    protected void hideLeftButton() {
+        mButtonLeft.setVisibility(View.INVISIBLE);
+    }
+
+    protected void hideRightButton() {
+        mButtonRight.setVisibility(View.INVISIBLE);
+    }
+
+    protected void setLeftButtonOnClickListener(View.OnClickListener listener) {
+        mButtonLeft.setOnClickListener(listener);
+    }
+
+    protected void setRightButtonOnClickListener(View.OnClickListener listener) {
+        mButtonRight.setOnClickListener(listener);
+    }
+}