为GridView中的分隔符提供不同的颜色？ [英] Provide Different Color to the Seperator in the GridView?
本文介绍了为GridView中的分隔符提供不同的颜色？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我拥有对其主要布局透明的GridView背景。列表项目应该有背景透明，但Seperator应该有不同的颜色。如何实现？
主容器（图片drawable是通过progamatically设置的）
< *************。AutoGridView
android：id =@ + id / dashMenu
android：layout_width =match_parent
android：layout_height =210dp
android：layout_alignParentBottom =true
android ：background =@ android：color / transparent
android：horizontalSpacing =1dp
android：numColumns =@ integer / grid_columns
android：scrollbars =none
android：stretchMode =columnWidth
android：verticalSpacing =1dp
android：visibility =visible/>
商品
<？xml version =1.0encoding =utf-8？>
< RelativeLayout xmlns：android =http://schemas.android.com/apk/res/android
xmlns：tools =http://schemas.android.com / tools
android：layout_width =match_parent
android：layout_height =match_parent
android：orientation =vertical>
$ b< LinearLayout
android：id =@ + id / menuWrapper
android：layout_width =match_parent
android：layout_height = match_parent
android：gravity =center
android：orientation =vertical
android：padding =12dp
tools：ignore =UseCompoundDrawables>
< ImageView
android：id =@ + id / menuImg
android：layout_width =58dp
android：layout_height =58dp
android：padding =8dp
android：src =@ mipmap / ic_launcher/>
TextView
android：id =@ + id / menuLabel
android：layout_width =match_parent
android：layout_height =wrap_content
android：fontFamily =@ font / montserrat_regular
android：gravity =center_horizontal
android：paddingBottom =6dp
android：text =Menu Item
android：textColor =@ color / white
android：textSize =12sp/>
< / LinearLayout>
< / RelativeLayout>
适配器
public class HomeMenuAdapter extends BaseAdapter {
private Context mContext;
private ArrayList< Menu>菜单;
public HomeMenuAdapter（Context context，ArrayList< Menu> menus）{
mContext = context;
this.menus =菜单;
}
@Override
public int getCount（）{
return menus.size（）;
}
@Override
public Menu getItem（int position）{
return menus.get（position）;
}
@Override
public long getItemId（int position）{
return 0;
}
@Override
public View getView（int position，View convertView，ViewGroup parent）{
LayoutInflater layoutInflater = LayoutInflater.from（mContext）;
Menu menu = menus.get（position）;
ImageView menuImage;
TextView menuLabel;
查看v;
if（convertView == null）{
v = layoutInflater.inflate（R.layout.dash_menu_item，null）;
} else {
v = convertView;
}
/ * int columns = 3;
int total = menus.size（）;
int rows = total / columns;
LinearLayout menuWrapper = v.findViewById（R.id.menuWrapper）; （（（位置+ 1）％列）== 0）{
if（（total - position）> columns）{
CommonUtils.setDrawableBackground（mContext，menuWrapper， drawable.menu_border_bottom）;
} else {
CommonUtils.setDrawableBackground（mContext，menuWrapper，R.drawable.menu_border_neutral）;
}
} else if（（total - position）> columns）{
CommonUtils.setDrawableBackground（mContext，menuWrapper，R.drawable.menu_border_right_bottom）;
} else {
CommonUtils.setDrawableBackground（mContext，menuWrapper，R.drawable.menu_border_right）;
}
* /
menuImage = v.findViewById（R.id.menuImg）;
menuLabel = v.findViewById（R.id.menuLabel）; （menu.getIcon（）！= null&&！TextUtils.isEmpty（menu.getIcon（））&& $ amp;
URLUtil.isValidUrl（menu.getIcon（） ））{
RequestOptions requestOptions = new RequestOptions（）;
requestOptions.error（menu.getIconId（））;
Glide.with（menuImage）.applyDefaultRequestOptions（requestOptions）
.load（menu.getIcon（））。into（menuImage）;
} else if（menu.getIconId（）！= 0）{
setImage（menuImage，menu.getIconId（））;
}
menuLabel.setText（menu.getName（））;
v.setOnClickListener（new OnOneClickListener（）{
@Override
public void onOneClick（View v）{
new Router（mContext）.route（menu）;
}
}）;
return v;
private void setImage（ImageView menuImage，int iconId）{
menuImage.setImageDrawable（mContext.getResources（）。getDrawable（
iconId））;
}
}
AutoGridView
public class AutoGridView extends GridView {
private static final String TAG =AutoGridView;
private int numColumnsID;
private int previousFirstVisible;
private int numColumns = 1;
public AutoGridView（Context context，AttributeSet attrs，int defStyle）{
super（context，attrs，defStyle）;
init（attrs）;
public AutoGridView（Context context，AttributeSet attrs）{
super（context，attrs）;
init（attrs）;
}
public AutoGridView（Context context）{
super（context）;
$ b $ ** b $ b *根据属性集
* /
设置numColumns private void init（AttributeSet attrs）{
//从AttributeSet中读取numColumns
int count = attrs.getAttributeCount（）;
if（count> 0）{
for（int i = 0; i< count; i ++）{
String name = attrs.getAttributeName（i）;
if（name！= null&& name.equals（numColumns））{
//更新列
this.numColumnsID = attrs.getAttributeResourceValue（i，1）;
updateColumns（）;
休息;
}
}
}
Log.d（TAG，numColumns设置为：+ numColumns）;
$ b / **
*从资源文件中读取列的数量，
*更新numColumns变量
* /
private void updateColumns（）{
this.numColumns = getContext（）。getResources（）。getInteger（numColumnsID）;
}
@Override
public void setNumColumns（int numColumns）{
this.numColumns = numColumns;
super.setNumColumns（numColumns）;
Log.d（TAG，setSelection - >+ previousFirstVisible）;
setSelection（previousFirstVisible）;
$ b $覆盖
protected void onLayout（boolean changed，int leftPos，int topPos，int rightPos，int bottomPos）{
super.onLayout（changed，leftPos ，topPos，rightPos，bottomPos）;
setHeights（）;
@Override
protected void onConfigurationChanged（Configuration newConfig）{
updateColumns（）;
setNumColumns（this.numColumns）;
$ b @Override
保护void onScrollChanged（int newHorizontal，int newVertical，int oldHorizontal，int oldVertical）{
//检查第一个可见位置是否已经改变由于这个滚动
int firstVisible = getFirstVisiblePosition（）;
if（previousFirstVisible！= firstVisible）{
//更新位置并更新高度
previousFirstVisible = firstVisible;
setHeights（）;
}
super.onScrollChanged（newHorizontal，newVertical，oldHorizontal，oldVertical）;
}
/ **
*设置一行中每个视图的高度等于此行中最高视图的高度。
* /
private void setHeights（）{
ListAdapter adapter = getAdapter（）;
if（adapter！= null）{
for（int i = 0; i< getChildCount（）; i + = numColumns）{
//确定最大高度这一行
int maxHeight = 0;
for（int j = i; j< i + numColumns; j ++）{
View view = getChildAt（j）;
if（view！= null&& view; getHeight（）> maxHeight）{
maxHeight = view.getHeight（）;
//Log.d（TAG，最大行高度＃+ i / numColumns +：+ maxHeight）;
//设置该行中每个元素的最大高度
if（maxHeight> 0）{
for（int j = i; j< i + numColumns; j ++ ）{
View view = getChildAt（j）;
if（view！= null&&& view.getHeight（）！= maxHeight）{
view.setMinimumHeight（maxHeight）;
}
}
}
}
}
}
}
不建议添加额外的视图（请）。
解决方案
请参阅
你必须根据你的愿望改变项目装饰颜色
I have the background of the GridView which is Transparent to its main layout. The List Item Should also have the background transparent , but the Seperator should have different Color .How can this be Achieved?
Main Container(image drawable is setted through progamatically)
<*************.AutoGridView
android:id="@+id/dashMenu"
android:layout_width="match_parent"
android:layout_height="210dp"
android:layout_alignParentBottom="true"
android:background="@android:color/transparent"
android:horizontalSpacing="1dp"
android:numColumns="@integer/grid_columns"
android:scrollbars="none"
android:stretchMode="columnWidth"
android:verticalSpacing="1dp"
android:visibility="visible" />
items
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/menuWrapper"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
android:padding="12dp"
tools:ignore="UseCompoundDrawables">
<ImageView
android:id="@+id/menuImg"
android:layout_width="58dp"
android:layout_height="58dp"
android:padding="8dp"
android:src="@mipmap/ic_launcher" />
<TextView
android:id="@+id/menuLabel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="@font/montserrat_regular"
android:gravity="center_horizontal"
android:paddingBottom="6dp"
android:text="Menu Item"
android:textColor="@color/white"
android:textSize="12sp" />
</LinearLayout>
</RelativeLayout>
Adapter
public class HomeMenuAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<Menu> menus;
public HomeMenuAdapter(Context context, ArrayList<Menu> menus) {
mContext = context;
this.menus = menus;
}
@Override
public int getCount() {
return menus.size();
}
@Override
public Menu getItem(int position) {
return menus.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater layoutInflater = LayoutInflater.from(mContext);
Menu menu = menus.get(position);
ImageView menuImage;
TextView menuLabel;
View v;
if (convertView == null) {
v = layoutInflater.inflate(R.layout.dash_menu_item, null);
} else {
v = convertView;
}
/*int columns = 3;
int total = menus.size();
int rows = total / columns;
LinearLayout menuWrapper = v.findViewById(R.id.menuWrapper);
if (((position + 1) % columns) == 0) {
if((total - position) > columns ) {
CommonUtils.setDrawableBackground(mContext, menuWrapper, R.drawable.menu_border_bottom);
} else {
CommonUtils.setDrawableBackground(mContext, menuWrapper, R.drawable.menu_border_neutral);
}
} else if((total - position) > columns ) {
CommonUtils.setDrawableBackground(mContext, menuWrapper, R.drawable.menu_border_right_bottom);
} else {
CommonUtils.setDrawableBackground(mContext, menuWrapper, R.drawable.menu_border_right);
}
*/
menuImage = v.findViewById(R.id.menuImg);
menuLabel = v.findViewById(R.id.menuLabel);
if(menu.getIcon() != null && !TextUtils.isEmpty(menu.getIcon()) &&
URLUtil.isValidUrl(menu.getIcon())) {
RequestOptions requestOptions = new RequestOptions();
requestOptions.error(menu.getIconId());
Glide.with(menuImage).applyDefaultRequestOptions(requestOptions)
.load(menu.getIcon()).into(menuImage);
} else if(menu.getIconId() != 0) {
setImage(menuImage, menu.getIconId());
}
menuLabel.setText(menu.getName());
v.setOnClickListener(new OnOneClickListener() {
@Override
public void onOneClick(View v) {
new Router(mContext).route(menu);
}
});
return v;
}
private void setImage(ImageView menuImage, int iconId) {
menuImage.setImageDrawable(mContext.getResources().getDrawable(
iconId));
}
}
AutoGridView
public class AutoGridView extends GridView {
private static final String TAG = "AutoGridView";
private int numColumnsID;
private int previousFirstVisible;
private int numColumns = 1;
public AutoGridView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(attrs);
}
public AutoGridView(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs);
}
public AutoGridView(Context context) {
super(context);
}
/**
* Sets the numColumns based on the attributeset
*/
private void init(AttributeSet attrs) {
// Read numColumns out of the AttributeSet
int count = attrs.getAttributeCount();
if(count > 0) {
for(int i = 0; i < count; i++) {
String name = attrs.getAttributeName(i);
if(name != null && name.equals("numColumns")) {
// Update columns
this.numColumnsID = attrs.getAttributeResourceValue(i, 1);
updateColumns();
break;
}
}
}
Log.d(TAG, "numColumns set to: " + numColumns);
}
/**
* Reads the amount of columns from the resource file and
* updates the "numColumns" variable
*/
private void updateColumns() {
this.numColumns = getContext().getResources().getInteger(numColumnsID);
}
@Override
public void setNumColumns(int numColumns) {
this.numColumns = numColumns;
super.setNumColumns(numColumns);
Log.d(TAG, "setSelection --> " + previousFirstVisible);
setSelection(previousFirstVisible);
}
@Override
protected void onLayout(boolean changed, int leftPos, int topPos, int rightPos, int bottomPos) {
super.onLayout(changed, leftPos, topPos, rightPos, bottomPos);
setHeights();
}
@Override
protected void onConfigurationChanged(Configuration newConfig) {
updateColumns();
setNumColumns(this.numColumns);
}
@Override
protected void onScrollChanged(int newHorizontal, int newVertical, int oldHorizontal, int oldVertical) {
// Check if the first visible position has changed due to this scroll
int firstVisible = getFirstVisiblePosition();
if(previousFirstVisible != firstVisible) {
// Update position, and update heights
previousFirstVisible = firstVisible;
setHeights();
}
super.onScrollChanged(newHorizontal, newVertical, oldHorizontal, oldVertical);
}
/**
* Sets the height of each view in a row equal to the height of the tallest view in this row.
*/
private void setHeights() {
ListAdapter adapter = getAdapter();
if(adapter != null) {
for(int i = 0; i < getChildCount(); i+=numColumns) {
// Determine the maximum height for this row
int maxHeight = 0;
for(int j = i; j < i+numColumns; j++) {
View view = getChildAt(j);
if(view != null && view.getHeight() > maxHeight) {
maxHeight = view.getHeight();
}
}
//Log.d(TAG, "Max height for row #" + i/numColumns + ": " + maxHeight);
// Set max height for each element in this row
if(maxHeight > 0) {
for(int j = i; j < i+numColumns; j++) {
View view = getChildAt(j);
if(view != null && view.getHeight() != maxHeight) {
view.setMinimumHeight(maxHeight);
}
}
}
}
}
}
}
Do not Suggest adding extra view(please).
解决方案
Please refer to
How can a divider line be added in an Android RecyclerView?
You have to change the item decorator color as u desire
这篇关于为GridView中的分隔符提供不同的颜色？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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