我想有一个2x2网格内的按钮。这只是ICS，所以我试图使用新的GridLayout给定。
这是我的布局的XML:
<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/favorites_grid"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00ff00"
android:rowCount="2"
android:columnCount="2">
<Button
android:text="Cell 0"
android:layout_row="0"
android:layout_column="0"
android:textSize="14dip" />
<Button
android:text="Cell 1"
android:layout_row="0"
android:layout_column="1"
android:textSize="14dip" />
<Button
android:text="Cell 2"
android:layout_row="1"
android:layout_column="0"
android:textSize="14dip" />
<Button
android:text="Cell 3"
android:layout_row="1"
android:layout_column="1"
android:textSize="14dip" />
</GridLayout>
问题是我的视图没有为每一行均匀地拉伸。这导致GridLayout的右侧有很多额外的空间。
我尝试设置layout_gravity="fill_horizontal"，但这只适用于该行的最后一个视图。这意味着单元格1会一直延伸，为单元格0提供足够的空间。
如何解决这个问题?
我只是在网格视图中做了简单的网格布局，并在想为什么我以前没有这样做。它很容易实现。(我在示例中使用自定义包装器CSView，但只是将其更改为View)。Ops要求只适用于GridView，所以我把它贴在这里作为答案。为了使拉伸均匀，以numColumns:auto_fit android:numColumns=2为例。
用法:
CSGridLayout(this, R.id.sound_store_grid, SubscriptionUpgradeStoreDialogItem(this),
PresetUpgradeStoreDialogItem(this), MidiUpgradeStoreDialogItem(this))
实现:
class CSGridLayout(parent: CSActivityView<*>,
viewId: Int,
vararg items: CSView<*>) : CSView<GridView>(parent, viewId) {
private val items = list(items)
private var adapter = Adapter()
init {
view.adapter = adapter
adapter.notifyDataSetChanged()
}
inner class Adapter : BaseAdapter() {
override fun getCount() = items.size
override fun getViewTypeCount() = 1
override fun isEnabled(position: Int) = true
override fun getItem(position: Int) = items[position]
override fun getItemViewType(position: Int) = 0
override fun getItemId(position: Int) = position.toLong()
override fun getView(position: Int, toReuseView: View?, parent: ViewGroup) =
items[position].view
}
}
你可以通过重写ViewGroup onLayout方法来提高速度。
这是我的普遍解决方案:
package your.app.package;
import android.content.Context;
import android.view.ViewGroup;
public class GridLayout extends ViewGroup {
public GridLayout(Context context) {
super(context);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int columns = 2;//edit this if you need different grid
final int rows = 2;
int children = getChildCount();
if (children != columns * rows)
throw new IllegalStateException("GridLayout must have " + columns * rows + " children");
int width = getWidth();
int height = getHeight();
int viewWidth = width / columns;
int viewHeight = height / rows;
int rowIndex = 0;
int columnIndex = 0;
for (int i = 0; i < children; i++) {
getChildAt(i).layout(viewWidth * columnIndex, viewHeight * rowIndex, viewWidth * columnIndex + viewWidth, viewHeight * rowIndex + viewHeight);
columnIndex++;
if (columnIndex == columns) {
columnIndex = 0;
rowIndex++;
}
}
}
}
编辑:
不要忘记match_parent for children!
android:layout_width="match_parent"
android:layout_height="match_parent"
给你:
Button button = new Button(this);
// weight = 1f , gravity = GridLayout.FILL
GridLayout.LayoutParams param= new GridLayout.LayoutParams(GridLayout.spec(
GridLayout.UNDEFINED,GridLayout.FILL,1f),
GridLayout.spec(GridLayout.UNDEFINED,GridLayout.FILL,1f));
// Layout_height = 0 ,Layout_weight = 0
params.height =0;
params.width = 0;
button.setLayoutParams(param);
