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/*
* 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.settingslib.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import androidx.core.content.res.TypedArrayUtils;
import androidx.preference.Preference;
import androidx.preference.PreferenceViewHolder;
/**
* A preference can be simply customized a view by adding layout attribute in xml.
* User also can decide whether or not LayoutPreference allows above divider or below divider.
*
* For instances,
*
* <com.android.settingslib.widget.LayoutPreference
* ...
* android:layout="@layout/settings_entity_header"
* xxxxxxx:allowDividerAbove="true"
* xxxxxxx:allowDividerBelow="true"
*
*/
public class LayoutPreference extends Preference {
private final View.OnClickListener mClickListener = v -> performClick(v);
private boolean mAllowDividerAbove;
private boolean mAllowDividerBelow;
private View mRootView;
/**
* Constructs a new LayoutPreference with the given context's theme and the supplied
* attribute set.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
*/
public LayoutPreference(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs, 0 /* defStyleAttr */);
}
/**
* Constructs a new LayoutPreference with the given context's theme, the supplied
* attribute set, and default style attribute.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @param defStyleAttr An attribute in the current theme that contains a
* reference to a style resource that supplies default
* values for the view. Can be 0 to not look for
* defaults.
*/
public LayoutPreference(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs, defStyleAttr);
}
/**
* Constructs a new LayoutPreference with the given context's theme and a customized view id.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param resource The view id which you expected to be inflated and show in preference.
*/
public LayoutPreference(Context context, int resource) {
this(context, LayoutInflater.from(context).inflate(resource, null, false));
}
/**
* Constructs a new LayoutPreference with the given context's theme and a customized view.
*
* @param context The Context the view is running in, through which it can
* access the current theme, resources, etc.
* @param view The view which you expected show in preference.
*/
public LayoutPreference(Context context, View view) {
super(context);
setView(view);
}
private void init(Context context, AttributeSet attrs, int defStyleAttr) {
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Preference);
mAllowDividerAbove = TypedArrayUtils.getBoolean(a, R.styleable.Preference_allowDividerAbove,
R.styleable.Preference_allowDividerAbove, false);
mAllowDividerBelow = TypedArrayUtils.getBoolean(a, R.styleable.Preference_allowDividerBelow,
R.styleable.Preference_allowDividerBelow, false);
a.recycle();
a = context.obtainStyledAttributes(
attrs, R.styleable.Preference, defStyleAttr, 0);
int layoutResource = a.getResourceId(R.styleable.Preference_android_layout, 0);
if (layoutResource == 0) {
throw new IllegalArgumentException("LayoutPreference requires a layout to be defined");
}
a.recycle();
// Need to create view now so that findViewById can be called immediately.
final View view = LayoutInflater.from(getContext())
.inflate(layoutResource, null, false);
setView(view);
}
private void setView(View view) {
setLayoutResource(R.layout.layout_preference_frame);
mRootView = view;
setShouldDisableView(false);
}
@Override
public void onBindViewHolder(PreferenceViewHolder holder) {
holder.itemView.setOnClickListener(mClickListener);
final boolean selectable = isSelectable();
holder.itemView.setFocusable(selectable);
holder.itemView.setClickable(selectable);
holder.setDividerAllowedAbove(mAllowDividerAbove);
holder.setDividerAllowedBelow(mAllowDividerBelow);
FrameLayout layout = (FrameLayout) holder.itemView;
layout.removeAllViews();
ViewGroup parent = (ViewGroup) mRootView.getParent();
if (parent != null) {
parent.removeView(mRootView);
}
layout.addView(mRootView);
}
/**
* Finds the view with the given ID.
*
* @param id the ID to search for
* @return a view with given ID if found, or {@code null} otherwise
*/
public <T extends View> T findViewById(int id) {
return mRootView.findViewById(id);
}
/**
* LayoutPreference whether or not allows to set a below divider.
*/
public void setAllowDividerBelow(boolean allowed) {
mAllowDividerBelow = allowed;
}
/**
* Return a value whether or not LayoutPreference allows to set a below divider.
*/
public boolean isAllowDividerBelow() {
return mAllowDividerBelow;
}
}
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