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README
Apache-2.0

AndroidAutoLayout

Android屏幕适配方案,直接填写设计图上的像素尺寸即可完成适配。

非常感谢 : 吃土豆的人 的协作。

效果图

最大幅度解决适配问题,并且最大化方便开发者。

so,看下用法:

你没有看错,拿到设计稿,在布局文件里面直接填写对应的px即可,px:这里的px并非是Google不建议使用的px,在内部会进行转化处理。

ok,拿一些实际项目的页面,看下不同分辨率下的效果:

左为:768 * 1280 ; 右为:1080 * 1920

上述两个机器的分辨率差距挺大了,但是完美实现了适配,最为重要的是:

  • 再也不用拿着设计稿去想这控件的宽高到底取多少dp
  • 再也不用去为多个屏幕去写多个dimens
  • 再也不用去计算百分比了(如果使用百分比控件完成适配)
  • 再也不用去跟UI MM去解释什么是dp了

你所要做的就是抄抄设计稿上面的px,直接写入布局文件。

还有很多好处,比如上面的Item里面元素比较多,如果标识的比较全面,一个FrameLayout,里面的View填写各种marginLeft,marginTop就能完美实现,几乎不需要嵌套了。

引入

  • Android Studio

autolayout引入

dependencies {
    compile project(':autolayout')
}

也可以直接

dependencies {
    compile 'com.zhy:autolayout:1.3.6'
}
  • Eclipse

下载AutoLayoutDemoForEclipse.zip,导入到eclipse中即可。

用法

第一步:

在你的项目的AndroidManifest中注明你的设计稿的尺寸。

<meta-data android:name="design_width" android:value="768">
</meta-data>
<meta-data android:name="design_height" android:value="1280">
</meta-data>
    

第二步:

让你的Activity继承自AutoLayoutActivity.

非常简单的两个步骤,你就可以开始愉快的编写布局了,详细可以参考sample。

其他用法

如果你不希望继承AutoLayoutActivity,可以在编写布局文件时,将

  • LinearLayout -> AutoLinearLayout
  • RelativeLayout -> AutoRelativeLayout
  • FrameLayout -> AutoFrameLayout

这样也可以完成适配。

目前支持属性

  • layout_width
  • layout_height
  • layout_margin(left,top,right,bottom)
  • pading(left,top,right,bottom)
  • textSize
  • maxWidth, minWidth, maxHeight, minHeight

配置

默认使用的高度是设备的可用高度,也就是不包括状态栏和底部的操作栏的,如果你希望拿设备的物理高度进行百分比化:

可以在Application的onCreate方法中进行设置:

public class UseDeviceSizeApplication extends Application
{
    @Override
    public void onCreate()
    {
        super.onCreate();
        AutoLayoutConifg.getInstance().useDeviceSize();
    }
}

预览

大家都知道,写布局文件的时候,不能实时的去预览效果,那么体验真的是非常的不好,也在很大程度上降低开发效率,所以下面教大家如何用好,用对PreView(针对该库)。

首先,你要记得你设计稿的尺寸,比如 768 * 1280

然后在你的PreView面板,选择于设计图分辨率一致的设备:

然后你就可以看到最为精确的预览了:

两个注意事项:

  1. 你们UI给的设计图的尺寸并非是主流的设计图,该尺寸没找到,你可以自己去新建一个设备。
  2. 不要在PreView中去查看所有分辨率下的显示,是看不出来适配效果的,因为有些计算是动态的。

扩展

对于其他继承系统的FrameLayout、LinearLayout、RelativeLayout的控件,比如CardView,如果希望再其内部直接支持"px"百分比化,可以自己扩展,扩展方式为下面的代码,也可参考issue#21

package com.zhy.sample.view;

import android.content.Context;
import android.support.v7.widget.CardView;
import android.util.AttributeSet;

import com.zhy.autolayout.AutoFrameLayout;
import com.zhy.autolayout.utils.AutoLayoutHelper;

/**
 * Created by zhy on 15/12/8.
 */
public class AutoCardView extends CardView
{
    private final AutoLayoutHelper mHelper = new AutoLayoutHelper(this);

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

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

    public AutoCardView(Context context, AttributeSet attrs, int defStyleAttr)
    {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public AutoFrameLayout.LayoutParams generateLayoutParams(AttributeSet attrs)
    {
        return new AutoFrameLayout.LayoutParams(getContext(), attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        if (!isInEditMode())
        {
            mHelper.adjustChildren();
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }


}

注意事项

ListView、RecyclerView类的Item的适配

对于ListView这类控件的item,默认根局部写“px”进行适配是无效的,因为外层非AutoXXXLayout,而是ListView。但是,不用怕,一行代码就可以支持了:

@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    ViewHolder holder = null;
    if (convertView == null)
    {
        holder = new ViewHolder();
        convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
        convertView.setTag(holder);
        //对于listview,注意添加这一行,即可在item上使用高度
        AutoUtils.autoSize(convertView);
    } else
    {
        holder = (ViewHolder) convertView.getTag();
    }

    return convertView;
}

注意 AutoUtils.autoSize(convertView);这行代码的位置即可。demo中也有相关实例。

指定设置的值参考宽度或者高度

由于该库的特点,布局文件中宽高上的1px是不相等的,于是如果需要宽高保持一致的情况,布局中使用属性:

app:layout_auto_basewidth="height",代表height上编写的像素值参考宽度。

app:layout_auto_baseheight="width",代表width上编写的像素值参考高度。

如果需要指定多个值参考宽度即:

app:layout_auto_basewidth="height|padding"

用|隔开,类似gravity的用法,取值为:

  • width,height
  • margin,marginLeft,marginTop,marginRight,marginBottom
  • padding,paddingLeft,paddingTop,paddingRight,paddingBottom
  • textSize.

TextView的高度问题

设计稿一般只会标识一个字体的大小,比如你设置textSize="20px",实际上TextView所占据的高度肯定大于20px,字的上下都会有一定的建议,所以一定要灵活去写字体的高度,比如对于text上下的margin可以选择尽可能小一点。或者选择别的约束条件去定位(比如上例,选择了marginBottom)

##TODO

  • 增加单个Activity横屏布局的支持(设计图必须是横屏的)
  • 完善demo(复杂的,简单的,ListView的各种)

其他信息

作者信息:

灵感来自:

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简介

Android屏幕适配方案,直接填写设计图上的像素尺寸即可完成适配,最大限度解决适配问题。【源自张鸿洋】 展开 收起
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