解决API<21时 GridLayout平均分配格行/列的问题

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问题：GridLayout在API21时引入了Android:layout_columnWeight和android:layout_rowWeight来解决平分问题，但是api21前怎么办呢？

解决：

1.引入兼容包：

[java] view plain copy print?

compile 'com.android.support:gridlayout-v7:23.0.0'

2.为GridLayout设置权重：

app:layout_columnWeight app:layout_rowWeight (注意这是是app因为21以前android是没有这个属性的)

以及行列跨越：app:layout_rowSpan app:layout_columnSpan

eg:

执行效果：

代码：

[java] view plain copy print?

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.nuctech.tr.trapp.activity.LoginActivity">
<com.zhy.android.percent.support.PercentLinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:gravity="center"
android:orientation="vertical">
<LinearLayout
android:layout_width="0dp"
android:layout_height="0dp"
android:orientation="vertical"
app:layout_heightPercent="80%sh"
app:layout_widthPercent="50%sw">
<com.nuctech.tr.trapp.ui.FillBlankView
android:layout_width="match_parent"
android:layout_height="60dp"
android:padding="5dp" />
<android.support.v7.widget.GridLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
app:rowCount="4"
app:columnCount="4"
>
　
<Button
android:id="@+id/one"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="1" />
　　
<Button
android:id="@+id/two"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="2" />
　　　
<Button
android:id="@+id/three"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="3" />
　　　
<Button
android:id="@+id/delete"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="退格" />
<Button
android:id="@+id/four"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="4" />
　　
<Button
android:id="@+id/five"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="5" />
　　
<Button
android:id="@+id/six"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="6" />
<Button
android:id="@+id/confirm"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowSpan="3"
app:layout_rowWeight="3"
android:text="OK" />
<Button
android:id="@+id/seven"
app:layout_columnWeight="1"
app:layout_gravity="fill"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="7" />
　　
<Button
android:id="@+id/eight"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="8" />
　　
<Button
android:id="@+id/nine"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="9" />
<Button
android:id="@+id/removeall"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="X" />
　　
<Button
android:id="@+id/zero"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="0" />
　　
<Button
android:id="@+id/shutdown"
app:layout_columnWeight="1"
android:layout_margin="2dp"
app:layout_rowWeight="1"
android:text="S" />
</android.support.v7.widget.GridLayout>
</LinearLayout>
</com.zhy.android.percent.support.PercentLinearLayout>
</RelativeLayout>

转自：http://blog.csdn.net/lvwenbo0107/article/details/51769602

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