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Android 百分比格局库(percent-support-lib) 解析与扩展

热度:84   发布时间:2016-04-28 00:15:44.0
Android 百分比布局库(percent-support-lib) 解析与扩展

转载请标明出处:
http://blog.csdn.net/lmj623565791/article/details/46695347;
本文出自:【张鸿洋的博客】


一、概述

周末游戏打得过猛,于是周天熬夜码代码,周一早上浑浑噩噩的发现android-percent-support-lib-sample这个项目,Google终于开始支持百分比的方式布局了,瞬间脉动回来,啊咧咧。对于这种历史性的时刻,不出篇博客难以表达我内心的激动。

还记得不久前,发了篇博客:Android 屏幕适配方案,这篇博客以Web页面设计引出一种适配方案,最终的目的就是可以通过百分比控制控件的大小。当然了,存在一些问题,比如:

  • 对于没有考虑到屏幕尺寸,可能会出现意外的情况;
  • apk的大小会增加;

当然了android-percent-support这个库,基本可以解决上述问题,是不是有点小激动,稍等,我们先描述下这个support-lib。

这个库提供了:

  • 两种布局供大家使用:
    PercentRelativeLayoutPercentFrameLayout,通过名字就可以看出,这是继承自FrameLayoutRelativeLayout两个容器类;

  • 支持的属性有:

layout_widthPercentlayout_heightPercent
layout_marginPercentlayout_marginLeftPercent
layout_marginTopPercentlayout_marginRightPercent
layout_marginBottomPercentlayout_marginStartPercentlayout_marginEndPercent

可以看到支持宽高,以及margin。

也就是说,大家只要在开发过程中使用PercentRelativeLayoutPercentFrameLayout替换FrameLayoutRelativeLayout即可。

是不是很简单,不过貌似没有LinearLayout,有人会说LinearLayout有weight属性呀。但是,weight属性只能支持一个方向呀~~哈,没事,刚好给我们一个机会去自定义一个PercentLinearLayout

好了,本文分为3个部分:

  • PercentRelativeLayoutPercentFrameLayout的使用
  • 对上述控件源码分析
  • 自定义PercentLinearLayout

二、使用

关于使用,其实及其简单,并且github上也有例子,android-percent-support-lib-sample。我们就简单过一下:

首先记得在build.gradle添加:

 compile 'com.android.support:percent:22.2.0'

(一)PercentFrameLayout

<?xml version="1.0" encoding="utf-8"?><android.support.percent.PercentFrameLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent">    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:layout_gravity="left|top"        android:background="#44ff0000"        android:text="width:30%,height:20%"        app:layout_heightPercent="20%"        android:gravity="center"        app:layout_widthPercent="30%"/>    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:layout_gravity="right|top"        android:gravity="center"        android:background="#4400ff00"        android:text="width:70%,height:20%"        app:layout_heightPercent="20%"        app:layout_widthPercent="70%"/>    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:layout_gravity="bottom"        android:background="#770000ff"        android:text="width:100%,height:10%"        android:gravity="center"        app:layout_heightPercent="10%"        app:layout_widthPercent="100%"/></android.support.percent.PercentFrameLayout>

3个TextView,很简单,直接看效果图:


(二) PercentRelativeLayout

<?xml version="1.0" encoding="utf-8"?><android.support.percent.PercentRelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:clickable="true">    <TextView        android:id="@+id/row_one_item_one"        android:layout_width="0dp"        android:layout_height="0dp"        android:layout_alignParentTop="true"        android:background="#7700ff00"        android:text="w:70%,h:20%"        android:gravity="center"        app:layout_heightPercent="20%"        app:layout_widthPercent="70%"/>    <TextView        android:id="@+id/row_one_item_two"        android:layout_width="0dp"        android:layout_height="0dp"        android:layout_toRightOf="@+id/row_one_item_one"        android:background="#396190"        android:text="w:30%,h:20%"        app:layout_heightPercent="20%"        android:gravity="center"        app:layout_widthPercent="30%"/>    <ImageView        android:id="@+id/row_two_item_one"        android:layout_width="match_parent"        android:layout_height="0dp"        android:src="@drawable/tangyan"        android:scaleType="centerCrop"        android:layout_below="@+id/row_one_item_one"        android:background="#d89695"        app:layout_heightPercent="70%"/>    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:layout_below="@id/row_two_item_one"        android:background="#770000ff"        android:gravity="center"        android:text="width:100%,height:10%"        app:layout_heightPercent="10%"        app:layout_widthPercent="100%"/></android.support.percent.PercentRelativeLayout>

ok,依然是直接看效果图:

使用没什么好说的,就是直观的看一下。


三、源码分析

其实细想一下,Google只是对我们原本熟悉的RelativeLayout和FrameLayout进行的功能的扩展,使其支持了percent相关的属性。

那么,我们考虑下,如果是我们添加这种扩展,我们会怎么做:

  • 通过LayoutParams获取child设置的percent相关属性的值
  • onMeasure的时候,将child的width,height的值,通过获取的自定义属性的值进行计算(eg:容器的宽 * fraction ),计算后传入给child.measure(w,h);

ok,有了上面的猜想,我们直接看PercentFrameLayout的源码。

public class PercentFrameLayout extends FrameLayout {    private final PercentLayoutHelper mHelper = new PercentLayoutHelper(this);    //省略了,两个构造方法    public PercentFrameLayout(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    public LayoutParams generateLayoutParams(AttributeSet attrs) {        return new LayoutParams(getContext(), attrs);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        mHelper.adjustChildren(widthMeasureSpec, heightMeasureSpec);        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        if (mHelper.handleMeasuredStateTooSmall()) {            super.onMeasure(widthMeasureSpec, heightMeasureSpec);        }    }    @Override    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {        super.onLayout(changed, left, top, right, bottom);        mHelper.restoreOriginalParams();    }    public static class LayoutParams extends FrameLayout.LayoutParams            implements PercentLayoutHelper.PercentLayoutParams {        private PercentLayoutHelper.PercentLayoutInfo mPercentLayoutInfo;        public LayoutParams(Context c, AttributeSet attrs) {            super(c, attrs);            mPercentLayoutInfo = PercentLayoutHelper.getPercentLayoutInfo(c, attrs);        }        //省略了一些代码...        @Override        public PercentLayoutHelper.PercentLayoutInfo getPercentLayoutInfo() {            return mPercentLayoutInfo;        }        @Override        protected void setBaseAttributes(TypedArray a, int widthAttr, int heightAttr) {            PercentLayoutHelper.fetchWidthAndHeight(this, a, widthAttr, heightAttr);        }    }}

代码是相当的短,可以看到PercentFrameLayout里面首先重写了generateLayoutParams方法,当然了,由于支持了一些新的layout_属性,那么肯定需要定义对应的LayoutParams。


(一)percent相关属性的获取

可以看到PercentFrameLayout.LayoutParams在原有的FrameLayout.LayoutParams基础上,实现了PercentLayoutHelper.PercentLayoutParams接口。

这个接口很简单,只有一个方法:

public interface PercentLayoutParams {        PercentLayoutInfo getPercentLayoutInfo();    }

而,这个方法的实现呢,也只有一行:return mPercentLayoutInfo;,那么这个mPercentLayoutInfo在哪完成赋值呢?

看PercentFrameLayout.LayoutParams的构造方法:

public LayoutParams(Context c, AttributeSet attrs) {            super(c, attrs);            mPercentLayoutInfo = PercentLayoutHelper.getPercentLayoutInfo(c, attrs);        }

可以看到,将attrs传入给getPercentLayoutInfo方法,那么不用说,这个方法的内部,肯定是获取自定义属性的值,然后将其封装到PercentLayoutInfo对象中,最后返回。

代码如下:

public static PercentLayoutInfo getPercentLayoutInfo(Context context,            AttributeSet attrs) {        PercentLayoutInfo info = null;        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.PercentLayout_Layout);        float value = array.getFraction(R.styleable.PercentLayout_Layout_layout_widthPercent, 1, 1,                -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent width: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.widthPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_heightPercent, 1, 1, -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent height: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.heightPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_marginPercent, 1, 1, -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent margin: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.leftMarginPercent = value;            info.topMarginPercent = value;            info.rightMarginPercent = value;            info.bottomMarginPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_marginLeftPercent, 1, 1,                -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent left margin: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.leftMarginPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_marginTopPercent, 1, 1,                -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent top margin: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.topMarginPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_marginRightPercent, 1, 1,                -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent right margin: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.rightMarginPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_marginBottomPercent, 1, 1,                -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent bottom margin: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.bottomMarginPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_marginStartPercent, 1, 1,                -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent start margin: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.startMarginPercent = value;        }        value = array.getFraction(R.styleable.PercentLayout_Layout_layout_marginEndPercent, 1, 1,                -1f);        if (value != -1f) {            if (Log.isLoggable(TAG, Log.VERBOSE)) {                Log.v(TAG, "percent end margin: " + value);            }            info = info != null ? info : new PercentLayoutInfo();            info.endMarginPercent = value;        }        array.recycle();        if (Log.isLoggable(TAG, Log.DEBUG)) {            Log.d(TAG, "constructed: " + info);        }        return info;    }

是不是和我们平时的取值很类似,所有的值最终封装到PercentLayoutInfo对象中。

ok,到此我们的属性获取就介绍完成,有了这些属性,是不是onMeasure里面要进行使用呢?


(二) onMeasue中重新计算child的尺寸

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

可以看到onMeasure中的代码页很少,看来核心的代码都被封装在mHelper的方法中,我们直接看mHelper.adjustChildren方法。

/**     * Iterates over children and changes their width and height to one calculated from percentage     * values.     * @param widthMeasureSpec Width MeasureSpec of the parent ViewGroup.     * @param heightMeasureSpec Height MeasureSpec of the parent ViewGroup.     */    public void adjustChildren(int widthMeasureSpec, int heightMeasureSpec) {        //...        int widthHint = View.MeasureSpec.getSize(widthMeasureSpec);        int heightHint = View.MeasureSpec.getSize(heightMeasureSpec);        for (int i = 0, N = mHost.getChildCount(); i < N; i++) {            View view = mHost.getChildAt(i);            ViewGroup.LayoutParams params = view.getLayoutParams();            if (params instanceof PercentLayoutParams) {                PercentLayoutInfo info =                        ((PercentLayoutParams) params).getPercentLayoutInfo();                if (Log.isLoggable(TAG, Log.DEBUG)) {                    Log.d(TAG, "using " + info);                }                if (info != null) {                    if (params instanceof ViewGroup.MarginLayoutParams) {                        info.fillMarginLayoutParams((ViewGroup.MarginLayoutParams) params,                                widthHint, heightHint);                    } else {                        info.fillLayoutParams(params, widthHint, heightHint);                    }                }            }        }    }

通过注释也能看出,此方法中遍历所有的孩子,通过百分比的属性重新设置其宽度和高度。

首先在widthHint、heightHint保存容器的宽、高,然后遍历所有的孩子,判断其LayoutParams是否是PercentLayoutParams类型,如果是,通过params.getPercentLayoutInfo拿出info对象。

是否还记得,上面的分析中,PercentLayoutInfo保存了percent相关属性的值。

如果info不为null,则判断是否需要处理margin;我们直接看fillLayoutParams方法(处理margin也是类似的)。

 /**         * Fills [email protected] ViewGroup.LayoutParams} dimensions based on percentage values.         */        public void fillLayoutParams(ViewGroup.LayoutParams params, int widthHint,                int heightHint) {            // Preserve the original layout params, so we can restore them after the measure step.            mPreservedParams.width = params.width;            mPreservedParams.height = params.height;            if (widthPercent >= 0) {                params.width = (int) (widthHint * widthPercent);            }            if (heightPercent >= 0) {                params.height = (int) (heightHint * heightPercent);            }            if (Log.isLoggable(TAG, Log.DEBUG)) {                Log.d(TAG, "after fillLayoutParams: (" + params.width + ", " + params.height + ")");            }        }

首先保存原本的width和height,然后重置params的width和height为(int) (widthHint * widthPercent)(int) (heightHint * heightPercent);

到此,其实我们的百分比转换就结束了,理论上就已经实现了对于百分比的支持,不过Google还考虑了一些细节。

我们回到onMeasure方法:

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

下面还有个mHelper.handleMeasuredStateTooSmall的判断,也就是说,如果你设置的百分比,最终计算出来的MeasuredSize过小的话,会进行一些操作。
代码如下:

public boolean handleMeasuredStateTooSmall() {        boolean needsSecondMeasure = false;        for (int i = 0, N = mHost.getChildCount(); i < N; i++) {            View view = mHost.getChildAt(i);            ViewGroup.LayoutParams params = view.getLayoutParams();            if (Log.isLoggable(TAG, Log.DEBUG)) {                Log.d(TAG, "should handle measured state too small " + view + " " + params);            }            if (params instanceof PercentLayoutParams) {                PercentLayoutInfo info =                        ((PercentLayoutParams) params).getPercentLayoutInfo();                if (info != null) {                    if (shouldHandleMeasuredWidthTooSmall(view, info)) {                        needsSecondMeasure = true;                        params.width = ViewGroup.LayoutParams.WRAP_CONTENT;                    }                    if (shouldHandleMeasuredHeightTooSmall(view, info)) {                        needsSecondMeasure = true;                        params.height = ViewGroup.LayoutParams.WRAP_CONTENT;                    }                }            }        }        if (Log.isLoggable(TAG, Log.DEBUG)) {            Log.d(TAG, "should trigger second measure pass: " + needsSecondMeasure);        }        return needsSecondMeasure;    }

首先遍历所有的孩子,拿出孩子的layoutparams,如果是PercentLayoutParams实例,则取出info。如果info不为null,调用shouldHandleMeasuredWidthTooSmall判断:

private static boolean shouldHandleMeasuredWidthTooSmall(View view, PercentLayoutInfo info) {        int state = ViewCompat.getMeasuredWidthAndState(view) & ViewCompat.MEASURED_STATE_MASK;        return state == ViewCompat.MEASURED_STATE_TOO_SMALL && info.widthPercent >= 0 &&                info.mPreservedParams.width == ViewGroup.LayoutParams.WRAP_CONTENT;    }

这里就是判断,如果你设置的measuredWidth或者measureHeight过小的话,并且你在布局文件中layout_w/h 设置的是WRAP_CONTENT的话,将params.width / height= ViewGroup.LayoutParams.WRAP_CONTENT,然后重新测量。

哈,onMeasure终于结束了~~~现在我觉得应该代码结束了吧,尺寸都设置好了,还需要干嘛么,but,你会发现onLayout也重写了,我们又不改变layout规则,在onLayout里面干什么毛线:

@Override    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {        super.onLayout(changed, left, top, right, bottom);        mHelper.restoreOriginalParams();    }

继续看mHelper.restoreOriginalParams

 /**     * Iterates over children and restores their original dimensions that were changed for     * percentage values. Calling this method only makes sense if you previously called     * [email protected] PercentLayoutHelper#adjustChildren(int, int)}.     */    public void restoreOriginalParams() {        for (int i = 0, N = mHost.getChildCount(); i < N; i++) {            View view = mHost.getChildAt(i);            ViewGroup.LayoutParams params = view.getLayoutParams();            if (Log.isLoggable(TAG, Log.DEBUG)) {                Log.d(TAG, "should restore " + view + " " + params);            }            if (params instanceof PercentLayoutParams) {                PercentLayoutInfo info =                        ((PercentLayoutParams) params).getPercentLayoutInfo();                if (Log.isLoggable(TAG, Log.DEBUG)) {                    Log.d(TAG, "using " + info);                }                if (info != null) {                    if (params instanceof ViewGroup.MarginLayoutParams) {                        info.restoreMarginLayoutParams((ViewGroup.MarginLayoutParams) params);                    } else {                        info.restoreLayoutParams(params);                    }                }            }        }    }

噗,原来是重新恢复原本的尺寸值,也就是说onMeasure里面的对值进行了改变,测量完成后。在这个地方,将值又恢复成如果布局文件中的值,上面写的都是0。恢复很简单:

public void restoreLayoutParams(ViewGroup.LayoutParams params) {            params.width = mPreservedParams.width;            params.height = mPreservedParams.height;        }

你应该没有忘在哪存的把~忘了的话,麻烦Ctrl+F ‘mPreservedParams.width’ 。

也就是说,你去打印上面写法,布局文件中view的v.getLayoutParams().width,这个值应该是0。

这里感觉略微不爽~这个0没撒用处呀,还不如不重置~~

好了,到此就分析完了,其实主要就几个步骤:

  • LayoutParams中属性的获取
  • onMeasure中,改变params.width为百分比计算结果,测量
  • 如果测量值过小且设置的w/h是wrap_content,重新测量
  • onLayout中,重置params.w/h为布局文件中编写的值

可以看到,有了RelativeLayout、FrameLayout的扩展,竟然没有LinearLayout几个意思。好在,我们的核心代码都由PercentLayoutHelper封装了,自己扩展下LinearLayout也不复杂。


三、实现PercentLinearlayout

可能有人会说,有了weight呀,但是weight能做到宽、高同时百分比赋值嘛?

好了,代码很简单,如下:


(一)PercentLinearLayout

package com.juliengenoud.percentsamples;import android.content.Context;import android.content.res.TypedArray;import android.support.percent.PercentLayoutHelper;import android.util.AttributeSet;import android.view.ViewGroup;import android.widget.LinearLayout;/** * Created by zhy on 15/6/30. */public class PercentLinearLayout extends LinearLayout{    private PercentLayoutHelper mPercentLayoutHelper;    public PercentLinearLayout(Context context, AttributeSet attrs)    {        super(context, attrs);        mPercentLayoutHelper = new PercentLayoutHelper(this);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)    {        mPercentLayoutHelper.adjustChildren(widthMeasureSpec, heightMeasureSpec);        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        if (mPercentLayoutHelper.handleMeasuredStateTooSmall())        {            super.onMeasure(widthMeasureSpec, heightMeasureSpec);        }    }    @Override    protected void onLayout(boolean changed, int l, int t, int r, int b)    {        super.onLayout(changed, l, t, r, b);        mPercentLayoutHelper.restoreOriginalParams();    }    @Override    public LayoutParams generateLayoutParams(AttributeSet attrs)    {        return new LayoutParams(getContext(), attrs);    }    public static class LayoutParams extends LinearLayout.LayoutParams            implements PercentLayoutHelper.PercentLayoutParams    {        private PercentLayoutHelper.PercentLayoutInfo mPercentLayoutInfo;        public LayoutParams(Context c, AttributeSet attrs)        {            super(c, attrs);            mPercentLayoutInfo = PercentLayoutHelper.getPercentLayoutInfo(c, attrs);        }        @Override        public PercentLayoutHelper.PercentLayoutInfo getPercentLayoutInfo()        {            return mPercentLayoutInfo;        }        @Override        protected void setBaseAttributes(TypedArray a, int widthAttr, int heightAttr)        {            PercentLayoutHelper.fetchWidthAndHeight(this, a, widthAttr, heightAttr);        }        public LayoutParams(int width, int height) {            super(width, height);        }        public LayoutParams(ViewGroup.LayoutParams source) {            super(source);        }        public LayoutParams(MarginLayoutParams source) {            super(source);        }    }}

如果你详细看了上面的源码分析,这个代码是不是没撒解释的了~


(二)测试布局

<?xml version="1.0" encoding="utf-8"?><com.juliengenoud.percentsamples.PercentLinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:background="#ff44aacc"        android:text="width:60%,height:5%"        android:textColor="#ffffff"        app:layout_heightPercent="5%"        app:layout_marginBottomPercent="5%"        app:layout_widthPercent="60%"/>    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:background="#ff4400cc"        android:gravity="center"        android:textColor="#ffffff"        android:text="width:70%,height:10%"        app:layout_heightPercent="10%"        app:layout_marginBottomPercent="5%"        app:layout_widthPercent="70%"/>    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:background="#ff44aacc"        android:gravity="center"        android:text="width:80%,height:15%"        android:textColor="#ffffff"        app:layout_heightPercent="15%"        app:layout_marginBottomPercent="5%"        app:layout_widthPercent="80%"/>    <TextView        android:layout_width="0dp"        android:layout_height="0dp"        android:background="#ff4400cc"        android:gravity="center"        android:text="width:90%,height:5%"        android:textColor="#ffffff"        app:layout_heightPercent="20%"        app:layout_marginBottomPercent="10%"        app:layout_widthPercent="90%"/>    <TextView        android:layout_width="match_parent"        android:layout_height="0dp"        android:background="#ff44aacc"        android:gravity="center"        android:text="width:100%,height:25%"        android:textColor="#ffffff"        app:layout_heightPercent="25%"        app:layout_marginBottomPercent="5%"        /></com.juliengenoud.percentsamples.PercentLinearLayout>

我们纵向排列的几个TextView,分别设置宽/高都为百分比,且之间的间隔为5%p。


(三)效果图

ok,到此,我们使用、源码分析、扩展PercentLinearLayout就结束了。

添加PercentLinearLayout后的地址:点击查看

~~have a nice day ~~

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25楼u01293236128分钟前
翔哥 是有多爱 唐嫣
24楼gaobin0001小时前
翔哥威武
23楼buluodebeidou1小时前
lz太给力了吧,我刚看到这个百分比布局的概念,网上一搜又转到你这了哈
22楼lianlianzhuifeng3小时前
21楼ApkCore4小时前
占位
Re: ApkCore3小时前
回复ApkCoreneclipse中如何添加这依赖呀?
20楼u0109031364小时前
话说我不知道为什么会有人踩,真不明白
19楼tiantang_19914小时前
eclipse中如何添加这个库的依赖呀
18楼qianguming4小时前
鸿神,怎么没有用那个wifi direct 写个可以不用连接wifi热点就也可以传输的apkdemo呢。
17楼tanranran5小时前
碉堡了,google已经把大神的代码加到更新里面了nhttps://github.com/hongyangAndroid/android-percent-support-lib-sample/commits/master
16楼nidage_5小时前
+1
15楼linzhong1235小时前
我来组成头部
14楼zuck_T5小时前
向hongyang致敬
13楼Dakaring5小时前
先顶再看
12楼davyzzzzz5小时前
沙发~~~~~~~~~~~~~~~~~
11楼u0109115766小时前
昨天晚上刚看到,就用了下,可是还是你牛啊,直接自己写了一个。。。
10楼wangyuetingtao6小时前
屌,真的收录了,牛逼大发了
9楼hlglinglong6小时前
顶!
8楼DanteStones6小时前
喜大普奔
7楼zhangkangbin6小时前
厉害更新那么快。。。一篇一篇的看楼主文章。。收益匪浅啊
6楼INfangkong6小时前
厉害 学习了
5楼u0133368286小时前
如果能控制位置!那就用一套布局就好了!
4楼jielundewode6小时前
不错,支持大神
3楼hlglinglong6小时前
android:text="width:90%,height:5%"n android:textColor="#ffffff"n app:layout_heightPercent="20%"nn这里注释写错了,应该是 height:20%
2楼qq_260057316小时前
翔哥威武!
1楼u0113709336小时前
在问我适配问题就可以好好回答了.
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