Question

怎么改变CheckBoxPreference组件中title和summary字体的大小

Answer 1

/*
* Copyright (C) 2007 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 android.preference;

import android.content.Context;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
* A {@link Preference} that provides checkbox widget functionality.
* <p>
* This preference will store a boolean into the SharedPreferences.
*
* @attr ref android.R.styleable#CheckBoxPreference_summaryOff
* @attr ref android.R.styleable#CheckBoxPreference_summaryOn
* @attr ref android.R.styleable#CheckBoxPreference_disableDependentsState
*/
public class CheckBoxPreferenceFontDefault extends CheckBoxPreference {
public String DefaultFont = "/system/fonts/DroidSansFallback.ttf";

public CheckBoxPreferenceFontDefault(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}

public CheckBoxPreferenceFontDefault(Context context, AttributeSet attrs) {
super(context, attrs);
}

public CheckBoxPreferenceFontDefault(Context context) {
super(context);
}

@Override
protected View onCreateView(ViewGroup parent) {
View view = super.onCreateView(parent);

TextView titleView = (TextView) view.findViewById(com.android.internal.R.id.title);;
Typeface tf = Typeface.createFromFile(DefaultFont);
titleView.setTypeface(tf);

return view;

}
}
已上是代码，核心点就是重写onCreateView()函数。

因为只有TextView才可以修改字体，大小等。

参考文档：

关于createFromAsset

Android 自定义CheckBoxPreference的CheckBox复选框

apply custom theme in android preference

Android中通过typeface设置字体

如何改变CheckBoxPreference组件中title和summary字体的大小