如何以编程方式将android:layout_columnWeight="1“设置为android support v7网格布局中的元素
如何以编程方式将android:layout_columnWeight="1“设置为android support v7网格布局中的元素
提问于 2015-07-27 22:07:06
我正在尝试以编程方式构建一个有2列的GirdLayout，我希望这些列的宽度相等，设置为屏幕宽度的一半。
我知道你可以从API21开始或者使用support v7 GirdLayout视图来做这件事。我看到一些使用android:layout_columnWeight="1“来做这件事的例子。但我找不到如何通过编程来实现这一点。
有人能帮我解决这件事吗？
package com.tunify.v3.component;
import java.util.ArrayList;
import android.support.v7.widget.GridLayout;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.ViewGroup;
import com.tunify.asme.data.ChangeableSelectionParameterValue;
public class ChangeableSelectionParameters extends GridLayout{
//private ArrayList<ChangeableSelectionParameterView> selectionParameterViews;
private ArrayList<ChangeableSelectionParameterValue> selectionParameterValues;
private static final int ITEM_PADDING_LEFT_DP = 0;
private static final int ITEM_PADDING_RIGHT_DP = 0;
private static final int ITEM_PADDING_TOP_DP = 0;
private static final int ITEM_PADDING_BOTTOM_DP = 0;
//private static final int MUSICCOLLECTION_DISPLAY_TEXT_SIZE_SP = 15;
public ChangeableSelectionParameters(android.content.Context context, ArrayList<ChangeableSelectionParameterValue> selectionParameterValues) {
super(context);
this.selectionParameterValues = selectionParameterValues;
initializeLayoutBasics(context);
initializeComponents();
}
private void initializeLayoutBasics(android.content.Context context) {
setOrientation(VERTICAL);
setColumnCount(2);
setRowCount((int)Math.ceil(selectionParameterValues.size()/2.0));
int width = ViewGroup.LayoutParams.MATCH_PARENT;
int height = ViewGroup.LayoutParams.WRAP_CONTENT;
android.view.ViewGroup.LayoutParams layoutParams = new android.view.ViewGroup.LayoutParams(width, height);
this.setLayoutParams(layoutParams);
DisplayMetrics metrics = getResources().getDisplayMetrics();
int paddingLeftPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_LEFT_DP, metrics);
int paddingRightPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_RIGHT_DP, metrics);
int paddingTopPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_TOP_DP, metrics);
int paddingBottomPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, ITEM_PADDING_BOTTOM_DP, metrics);
setPadding(paddingLeftPx, paddingTopPx, paddingRightPx, paddingBottomPx);
}
private void initializeComponents() {
for(ChangeableSelectionParameterValue param : this.selectionParameterValues){
ChangeableSelectionParameterView v = new ChangeableSelectionParameterView(getContext(), param);
//TODO set views layout column weight to 1
this.addView(v);
}
}
}解决方案：
GridLayout.LayoutParams parem = new LayoutParams(GridLayout.spec(GridLayout.UNDEFINED, 1f), GridLayout.spec(GridLayout.UNDEFINED, 1f));
v.setLayoutParams(parem);回答 4
Stack Overflow用户
回答已采纳
发布于 2015-07-27 22:56:29
我在GridLayout中找到了这个方法：http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/5.0.0_r1/android/widget/GridLayout.java#GridLayout.spec%28int%2Cfloat%29
所以也许你可以尝试一下这样的方法：
((GridLayout.LayoutParams) this.getLayoutParams()).columnSpec =
GridLayout.spec(GridLayout.UNDEFINED, 1f);Stack Overflow用户
发布于 2017-11-26 11:58:21
-Here你就是！:>
Button button = new Button(this);
GridLayout.LayoutParams param= new GridLayout.LayoutParams(GridLayout.spec(
GridLayout.UNDEFINED,GridLayout.FILL,1f),
GridLayout.spec(GridLayout.UNDEFINED,GridLayout.FILL,1f));
param.height = 0;
param.width = 0;
button.setLayoutParams(param);Stack Overflow用户
发布于 2018-03-11 08:43:38
对于任何使用xamarin.android的人来说，这些答案对我很有帮助，但我不得不稍微改变一下语法。因此，如果其他人正在使用xamarin.android，下面是语法：
GridLayout.LayoutParams param = new GridLayout.LayoutParams();
param.RowSpec = GridLayout.InvokeSpec(GridLayout.Undefined, 1f);
param.ColumnSpec = GridLayout.InvokeSpec(GridLayout.Undefined, 1f);
view.LayoutParameters = param;其中view是包含在GridLayout中的视图。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/31655352
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