安卓百分比布局的使用

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安卓百分比布局的使用： 在gradle中加此行代码 compile 'com.zhy:percent-support-extends:1.0.1'

他有PercentRelativeLayout、PercentFrameLayout两个类，

我们可以根据他们延伸出其他布局 比如线性布局（LinearL

package com.example.mrzhang.myapplication.MyControl;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 MrZhang on 15/6/30. * 自定义组件  实现线性百分比布局 */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);        }        //可加也可以不加//        public LayoutParams(int width, int height) {//            super(width, height);//        }//////        public LayoutParams(ViewGroup.LayoutParams source) {//            super(source);//        }////        public LayoutParams(MarginLayoutParams source) {//            super(source);//        }    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout 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">    <com.example.mrzhang.myapplication.MyControl.PercentLinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical">        <TextView            android:gravity="center"            android:id="@+id/text"            android:layout_width="0dp"            android:layout_height="0dp"            android:background="#000000"            android:text="textview"            android:textColor="#ffffff"            app:layout_heightPercent="10%"            app:layout_widthPercent="100%" />        <TextView            android:id="@+id/tiaozuan"            android:gravity="center"            android:layout_width="0dp"            android:layout_height="0dp"            android:background="#ff0000"            android:text="textview"            android:textColor="#ffffff"            app:layout_heightPercent="10%"            app:layout_widthPercent="100%" />        <Button            android:gravity="center"            android:id="@+id/xiangce"            android:layout_width="0dp"            android:layout_height="0dp"            android:text="相册"            app:layout_heightPercent="10%"            app:layout_widthPercent="100%" />        <ImageView            android:id="@+id/imageview"            android:layout_width="0dp"            android:layout_height="0dp"            app:layout_heightPercent="30%"            android:layout_gravity="center"            app:layout_widthPercent="50%"/>        <com.example.mrzhang.myapplication.MyAsynchronization.NumberKeyboardView            android:id="@+id/numbers"            android:layout_width="0dp"            android:layout_height="0dp"            android:gravity="center"            android:layout_gravity="center_horizontal"            app:layout_heightPercent="40%"            app:layout_widthPercent="100%" />    </com.example.mrzhang.myapplication.MyControl.PercentLinearLayout></LinearLayout>

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