fix: 首次提交
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settingslib.widget;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.util.AttributeSet;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.FrameLayout;
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import androidx.core.content.res.TypedArrayUtils;
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import androidx.preference.Preference;
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import androidx.preference.PreferenceViewHolder;
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/**
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* A preference can be simply customized a view by adding layout attribute in xml.
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* User also can decide whether or not LayoutPreference allows above divider or below divider.
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*
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* For instances,
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*
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* <com.android.settingslib.widget.LayoutPreference
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* ...
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* android:layout="@layout/settings_entity_header"
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* xxxxxxx:allowDividerAbove="true"
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* xxxxxxx:allowDividerBelow="true"
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*
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*/
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public class LayoutPreference extends Preference {
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private final View.OnClickListener mClickListener = v -> performClick(v);
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private boolean mAllowDividerAbove;
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private boolean mAllowDividerBelow;
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private View mRootView;
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/**
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* Constructs a new LayoutPreference with the given context's theme and the supplied
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* attribute set.
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*
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* @param context The Context the view is running in, through which it can
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* access the current theme, resources, etc.
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* @param attrs The attributes of the XML tag that is inflating the view.
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*/
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public LayoutPreference(Context context, AttributeSet attrs) {
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super(context, attrs);
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init(context, attrs, 0 /* defStyleAttr */);
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}
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/**
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* Constructs a new LayoutPreference with the given context's theme, the supplied
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* attribute set, and default style attribute.
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*
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* @param context The Context the view is running in, through which it can
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* access the current theme, resources, etc.
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* @param attrs The attributes of the XML tag that is inflating the view.
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* @param defStyleAttr An attribute in the current theme that contains a
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* reference to a style resource that supplies default
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* values for the view. Can be 0 to not look for
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* defaults.
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*/
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public LayoutPreference(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init(context, attrs, defStyleAttr);
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}
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/**
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* Constructs a new LayoutPreference with the given context's theme and a customized view id.
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*
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* @param context The Context the view is running in, through which it can
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* access the current theme, resources, etc.
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* @param resource The view id which you expected to be inflated and show in preference.
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*/
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public LayoutPreference(Context context, int resource) {
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this(context, LayoutInflater.from(context).inflate(resource, null, false));
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}
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/**
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* Constructs a new LayoutPreference with the given context's theme and a customized view.
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*
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* @param context The Context the view is running in, through which it can
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* access the current theme, resources, etc.
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* @param view The view which you expected show in preference.
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*/
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public LayoutPreference(Context context, View view) {
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super(context);
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setView(view);
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}
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private void init(Context context, AttributeSet attrs, int defStyleAttr) {
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TypedArray a = context.obtainStyledAttributes(attrs, androidx.preference.R.styleable.Preference);
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mAllowDividerAbove = TypedArrayUtils.getBoolean(a, androidx.preference.R.styleable.Preference_allowDividerAbove,
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androidx.preference.R.styleable.Preference_allowDividerAbove, false);
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mAllowDividerBelow = TypedArrayUtils.getBoolean(a, androidx.preference.R.styleable.Preference_allowDividerBelow,
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androidx.preference.R.styleable.Preference_allowDividerBelow, false);
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a.recycle();
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a = context.obtainStyledAttributes(
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attrs, androidx.preference.R.styleable.Preference, defStyleAttr, 0);
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int layoutResource = a.getResourceId(androidx.preference.R.styleable.Preference_android_layout, 0);
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if (layoutResource == 0) {
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throw new IllegalArgumentException("LayoutPreference requires a layout to be defined");
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}
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a.recycle();
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// Need to create view now so that findViewById can be called immediately.
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final View view = LayoutInflater.from(getContext())
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.inflate(layoutResource, null, false);
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setView(view);
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}
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private void setView(View view) {
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setLayoutResource(com.android.settingslib.widget.preference.layout.R.layout.layout_preference_frame);
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mRootView = view;
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setShouldDisableView(false);
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}
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@Override
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public void onBindViewHolder(PreferenceViewHolder holder) {
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holder.itemView.setOnClickListener(mClickListener);
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final boolean selectable = isSelectable();
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holder.itemView.setFocusable(selectable);
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holder.itemView.setClickable(selectable);
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holder.setDividerAllowedAbove(mAllowDividerAbove);
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holder.setDividerAllowedBelow(mAllowDividerBelow);
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FrameLayout layout = (FrameLayout) holder.itemView;
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layout.removeAllViews();
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ViewGroup parent = (ViewGroup) mRootView.getParent();
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if (parent != null) {
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parent.removeView(mRootView);
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}
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layout.addView(mRootView);
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}
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/**
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* Finds the view with the given ID.
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*
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* @param id the ID to search for
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* @return a view with given ID if found, or {@code null} otherwise
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*/
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public <T extends View> T findViewById(int id) {
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return mRootView.findViewById(id);
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}
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/**
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* LayoutPreference whether or not allows to set a below divider.
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*/
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public void setAllowDividerBelow(boolean allowed) {
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mAllowDividerBelow = allowed;
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}
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/**
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* Return a value whether or not LayoutPreference allows to set a below divider.
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*/
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public boolean isAllowDividerBelow() {
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return mAllowDividerBelow;
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}
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}
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