[Settings] Refractor ApnSettings code to independent package folder.

Bug: 169750507
Test: make RunSettingsRoboTests
Change-Id: I8b2709ba8d16c625863d8a17abc3d0ab5d019bb8

src/com/android/settings/network/apn/ApnPreference.java

@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2009 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.network.apn;
+
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.provider.Telephony;
+import android.telephony.SubscriptionManager;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+import android.widget.CompoundButton;
+import android.widget.RadioButton;
+import android.widget.RelativeLayout;
+import android.widget.Toast;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceViewHolder;
+
+import com.android.settings.R;
+
+/**
+ * Preference of APN UI entry
+ */
+public class ApnPreference extends Preference implements CompoundButton.OnCheckedChangeListener,
+        View.OnClickListener {
+    private static final  String TAG = "ApnPreference";
+
+    private int mSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+
+    /**
+     * Constructor of Preference
+     */
+    public ApnPreference(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    /**
+     * Constructor of Preference
+     */
+    public ApnPreference(Context context, AttributeSet attrs) {
+        this(context, attrs, R.attr.apnPreferenceStyle);
+    }
+
+    /**
+     * Constructor of Preference
+     */
+    public ApnPreference(Context context) {
+        this(context, null);
+    }
+
+    private static String sSelectedKey = null;
+    private static CompoundButton sCurrentChecked = null;
+    private boolean mProtectFromCheckedChange = false;
+    private boolean mSelectable = true;
+    private boolean mHideDetails = false;
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder view) {
+        super.onBindViewHolder(view);
+
+        final RelativeLayout textArea = (RelativeLayout) view.findViewById(R.id.text_layout);
+        textArea.setOnClickListener(this);
+
+        final View widget = view.findViewById(R.id.apn_radiobutton);
+        if ((widget != null) && widget instanceof RadioButton) {
+            final RadioButton rb = (RadioButton) widget;
+            if (mSelectable) {
+                rb.setOnCheckedChangeListener(this);
+
+                final boolean isChecked = getKey().equals(sSelectedKey);
+                if (isChecked) {
+                    sCurrentChecked = rb;
+                    sSelectedKey = getKey();
+                }
+
+                mProtectFromCheckedChange = true;
+                rb.setChecked(isChecked);
+                mProtectFromCheckedChange = false;
+                rb.setVisibility(View.VISIBLE);
+            } else {
+                rb.setVisibility(View.GONE);
+            }
+        }
+    }
+
+    /**
+     * Return the preference is checked or not.
+     */
+    public boolean isChecked() {
+        return getKey().equals(sSelectedKey);
+    }
+
+    /**
+     * Set preference checked.
+     */
+    public void setChecked() {
+        sSelectedKey = getKey();
+    }
+
+    /**
+     * Change the preference status.
+     */
+    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+        Log.i(TAG, "ID: " + getKey() + " :" + isChecked);
+        if (mProtectFromCheckedChange) {
+            return;
+        }
+
+        if (isChecked) {
+            if (sCurrentChecked != null) {
+                sCurrentChecked.setChecked(false);
+            }
+            sCurrentChecked = buttonView;
+            sSelectedKey = getKey();
+            callChangeListener(sSelectedKey);
+        } else {
+            sCurrentChecked = null;
+            sSelectedKey = null;
+        }
+    }
+
+    @Override
+    public void onClick(View layoutView) {
+        super.onClick();
+        final Context context = getContext();
+        final int pos = Integer.parseInt(getKey());
+        if (context == null) {
+            Log.w(TAG, "No context available for pos=" + pos);
+            return;
+        }
+
+        if (mHideDetails) {
+            Toast.makeText(context, context.getString(
+                    R.string.cannot_change_apn_toast), Toast.LENGTH_LONG).show();
+            return;
+        }
+        final Uri url = ContentUris.withAppendedId(Telephony.Carriers.CONTENT_URI, pos);
+        final Intent editIntent = new Intent(Intent.ACTION_EDIT, url);
+        editIntent.putExtra(ApnSettings.SUB_ID, mSubId);
+        editIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+        context.startActivity(editIntent);
+    }
+
+    public void setSelectable(boolean selectable) {
+        mSelectable = selectable;
+    }
+
+    public boolean getSelectable() {
+        return mSelectable;
+    }
+
+    public void setSubId(int subId) {
+        mSubId = subId;
+    }
+
+    /**
+     * Hide details
+     */
+    public void setHideDetails() {
+        mHideDetails = true;
+    }
+}