Hi friends I'm working on an app which contains a ViewPager having heading and its description in each view. Initially only 3 lines of those description has to be shown but when clicked it will expand to full description.
I tried doing these but unfortunately couldn't achieve it. So, anyone can please help me with these.. Thanks in advance.
Xml
<RelativeLayout android:id="#+id/llDescriptionMap"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.explorelife.CustomViews.CustomViewPager
android:id="#+id/vpDescriptionMap"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<com.viewpagerindicator.CirclePageIndicator
android:id="#+id/indicatorDescriptionMap"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/vpDescriptionMap"
android:padding="2dp"
app:radius="5dp" />
</RelativeLayout>
CustomViewPager
public class CustomViewPager extends ViewPager{
public CustomViewPager(Context context) {
super(context);
}
public CustomViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = 0;
for(int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int h = child.getMeasuredHeight();
if(h > height) height = h;
}
heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}}
first your XML Must be like this..
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
>
</android.support.v4.view.ViewPager>
can you send your viewpager code first..
Related
I've only included one direct child in the scroll view , and i've added the below codes in the java files. When i remove the Utility method the listview appear fully, but doesnt work as a scrollview
ScrollView sv_fragment_globe;
sv_fragment_globe = (ScrollView)rowView.findViewById(R.id.sv_fragment_globe);
sv_fragment_globe.smoothScrollTo(0,0);
Utility.setListViewHeightBasedOnChildren(holder.lv_globe);
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/sv_fragment_globe"
android:fillViewport="true"
>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="0dp"
android:orientation="vertical"
>
<ImageView
android:layout_width="fill_parent"
android:layout_height="200dp"
android:src="#drawable/home_hospital1"
android:id="#+id/iv_vp_globe"
android:scaleType="fitXY"
/>
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/lv_globe"
>
</ListView>
</LinearLayout>
</ScrollView>
</android.support.v4.widget.SwipeRefreshLayout>
If you have more than two scrolling views inside any Layout, then the parent scrolling view will only scrolls. Follow the steps below to allows the child's scrolling elements to scroll.
Step 1:
Create a custom ListView.
public class ExpandableHeightListView extends ListView
{
boolean expanded = false;
public ExpandableHeightListView(Context context)
{
super(context);
}
public ExpandableHeightListView(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public ExpandableHeightListView(Context context, AttributeSet attrs,int defStyle)
{
super(context, attrs, defStyle);
}
public boolean isExpanded()
{
return expanded;
}
#Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// HACK! TAKE THAT ANDROID!
if (isExpanded())
{
// Calculate entire height by providing a very large height hint.
// But do not use the highest 2 bits of this integer; those are
// reserved for the MeasureSpec mode.
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
ViewGroup.LayoutParams params = getLayoutParams();
params.height = getMeasuredHeight();
}
else
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public void setExpanded(boolean expanded)
{
this.expanded = expanded;
}
}
Step 2: Add the line below after initializing the Listview object.
lv_selected_time_zone.setExpanded(true);
Try this
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="1"
>
<ImageView
android:layout_width="match_parent"
android:layout_height="200dp"
android:src="#android:drawable/home_hospital"
android:id="#+id/iv_vp_globe"
android:scaleType="fitXY"
/>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/lv_globe"
android:layout_weight="1"
>
</ListView>
</LinearLayout>
</ScrollView>
</android.support.v4.widget.SwipeRefreshLayout>
I am trying to populate a gridview with image thumbnails. I am unable to center the child items and a mismatch occurs when the image orientation is different i.e landscape vs portrait. The pic shows how it is coming out. I dont want to change the size of the thumbnails but to display the text view on the same level and the imageview to be centered accordingly.
photo gridview with childs not centered
Gridview XML:
<syook.syookfirst.classes.Utils.ExpandableHeightGridView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/listview_call_photos"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
android:layout_weight="1"
android:nestedScrollingEnabled="true"
android:gravity="center"
android:layout_gravity="center"
android:numColumns="auto_fit">
</syook.syookfirst.classes.Utils.ExpandableHeightGridView>
ExpandableHeightGridView class:
public class ExpandableHeightGridView extends GridView
{
boolean expanded = false;
public ExpandableHeightGridView(Context context)
{
super(context);
}
public ExpandableHeightGridView(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public ExpandableHeightGridView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}
public boolean isExpanded()
{
return expanded;
}
#Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// HACK! TAKE THAT ANDROID!
if (isExpanded())
{
// Calculate entire height by providing a very large height hint.
// But do not use the highest 2 bits of this integer; those are
// reserved for the MeasureSpec mode.
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
ViewGroup.LayoutParams params = getLayoutParams();
params.height = getMeasuredHeight();
}
else
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public void setExpanded(boolean expanded)
{
this.expanded = expanded;
}
}
Gridview child layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/button_pressed_nocolor_all"
android:gravity="center">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/photo_thumb_calldetails"
android:padding="5dp"
android:layout_gravity="center" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/label_photo_name"
android:textSize="12sp"
android:layout_gravity="center"
android:gravity="center"
android:padding="2dp"
android:layout_marginBottom="2dp" />
Appreciate any help on this. I tried searching for such issues but haven't been able to resolve it with any of the solutions provided.
Setting the height of ImageView to 100dp works. Thanks :)
Just set fix width and set gravity to center.
android:layout_width="8" and
android:gravity="center"
I try to create custom ScrollView, which will have attribute max_height, but i faced with problem. When I set custom height, ScrollView doesn't show TextView.
Lite version of my code:
Layout:
<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">
<com.example.scrollviewtest.ExpandScrollView
android:id="#+id/scrollView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="#Fe6" >
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView TextView TextView TextView TextView" />
</com.example.scrollviewtest.ExpandScrollView>
ExpandScrollView.java
public class ExpandScrollView extends ScrollView {
public ExpandScrollView(Context context) {
super(context);
}
public ExpandScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
setMeasuredDimension(widthSize, 180);
}}
So what do i do wrong?
Just remove the onMeasure() method in ExpandScrollView class. It is causing problem.
Once you remove it textview will be visible.
The problem was solved!
I just added super.onMeasure(widthMeasureSpec, heightMeasureSpec); before widthSize
Here is what I would like my ScrollView to look like:
The maximum size is defined with the layout_weight (so that other items below the ScrollView can be displayed properly)
If the content is smaller than that maximum size, then it just behaves as with layout_height="wrap_content"
Here is what I currently have:
<ScrollView
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:measureAllChildren="true"
android:fillViewport="false"
>
I don't think the measureAllChildren really does anything at all...
If I add android:layout_weight, the size will always be what I would like the maximum to be. Without it, it just extends more than it should...
I don't mind extending the ScrollView class to change the behavior of onMeasure if I need to...?
PS: If that makes a differences, I am trying to get this working from Froyo onward.
I ended up writing my own class, extending ScrollView
Since you ask...here is the code. Probably not the cleanest but it does what I want.
Note that it expects the layout_weight to be set when the view is created and you should not set the weigthSum in the parent LinearLayout or you'll get funny things (since the weight of this one changes from the original value to 0 depending on the size of the content of the ScrollView)
First, in the layout file, the view is declared like this:
<com.matthieu.widget.ShrinkingScrollView
android:id="#+id/scroll"
android:scrollbars="vertical"
android:layout_height="0dp"
android:layout_width="fill_parent"
android:layout_weight="4"
android:background="#cc0000"
>
<TextView
android:id="#+id/in_scroll_view"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:background="#0000bb"
/>
</com.matthieu.widget.ShrinkingScrollView>
Then the code for the widget:
import android.content.Context;
import android.util.AttributeSet;
import android.widget.LinearLayout;
import android.widget.ScrollView;
public class ShrinkingScrollView extends ScrollView {
private float original_weight=-1;
public ShrinkingScrollView(Context context) {
super(context);
}
public ShrinkingScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ShrinkingScrollView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) getLayoutParams();
float previous_weight = params.weight;
if (original_weight == -1)
original_weight = params.weight;
if ((getChildCount()>0) && (getVisibility()!=GONE)) {
super.onMeasure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0,MeasureSpec.UNSPECIFIED));
int overall_height = getChildAt(0).getMeasuredHeight();
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (getMeasuredHeight() >= overall_height) {
if (previous_weight != 0) {
params.weight=0;
params.height = overall_height;
setLayoutParams(params);
post(new Runnable() {
public void run() {
requestLayout();
}
});
}
setMeasuredDimension(getMeasuredWidth(),overall_height);
}
else if (previous_weight == 0) {
params.weight = original_weight;
params.height = 0;
setLayoutParams(params);
post(new Runnable() {
public void run() {
requestLayout();
}
});
}
}
else {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
}
If I understand your requirement correctly, the way I have done something like this is to place the scrollview along with anything else you want to display below it into a Relative layout. Then, in your layout file place the item on the bottom of the screen in the file first (with android:layout_alignParentBottom="true"), then put the scroll view and place it above the first item using something like:android:layout_above="#id/firstItem". Like this in which I put an image view on the bottom with a scroll view above it taking the remaining space:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/searchByNameScreen"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:layout_marginTop="1dip"
android:gravity="center_horizontal"
android:orientation="vertical" >
<ImageView
android:id="#+id/bottomImage"
android:layout_width="fill_parent"
android:layout_height="75dip"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:paddingBottom="15dip"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:paddingTop="7dip"
android:scaleType="fitXY"
android:src="#drawable/android_450x50_moreinfo" />
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/ScrollView01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#id/bottomImage"
android:layout_marginBottom="3dip"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:layout_marginTop="1dip"
android:scrollbars="none" >
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/aboutCopyLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/aboutTopLayer"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"
android:background="#drawable/rounded_background"
android:gravity="center"
android:padding="5dip" >
<!-- android:background="#drawable/rounded_background" -->
<TextView
android:id="#+id/aboutCopyText"
style="#style/ResortNameExtraLine"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_horizontal"
android:text="#string/aboutCopy" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
Here another solution using sizes instead of weights. I've extended ScrollView and added code to implement this feature:
https://gist.github.com/JMPergar/439aaa3249fa184c7c0c
I hope that be useful.
JMpergar answer seems right but its not worked until I changed the onMeasure method like below.
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
try {
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
if (maxHeight != WITHOUT_MAX_HEIGHT_VALUE
&& heightSize > maxHeight) {
heightSize = maxHeight;
heightMeasureSpec = MeasureSpec.makeMeasureSpec(heightSize, MeasureSpec.AT_MOST);
getLayoutParams().height = heightSize;
} else {
heightMeasureSpec = MeasureSpec.makeMeasureSpec(heightSize, MeasureSpec.AT_MOST);
setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec)
, getDefaultSize(this.getSuggestedMinimumHeight(), heightMeasureSpec));
}
} catch (Exception e) {
e.printStackTrace();
} finally {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
you can just wrap your ScrollView into another ConstraintLayout, then constrain the height (the line app:layout_constrainedHeight="true"):
<!-- another constraint layout to keep ScrollView shrinking -->
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constrainedHeight="true"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/content_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
I am trying to display a dynamically-growing list of strings with a checkbox in a GridView, which is itself in a TableLayout.
I can display these "checkboxed" strings fine in a row. My problem occurs when I let the user dynamically add new strings in the GridView.
I created a custom adapter that receives the list of strings. Say we have n strings. The adapter returns 'n + 1' for the items count; in getView, it returns:
a View with a LinearLayout, itself having a CheckBox and an EditText for the first n items,
a LinearLayout with a simple button, with a '+' caption for the 'n + 1'th item.
So far so good. When the '+' button is clicked, I add an empty string to the list of strings and call notifyDataSetChanged in the adapter.
The GridView redraws itself with one more item. BUT it keeps its original height and creates a vertical scrollbar. I'd like the GridView to expand its height (i.e. take up more space on screen and show all items).
I've tried to change the screen to a vertical LinearLayout instead of a TableLayout, but the results is the same.
Here is the layout of my screen:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<!-- other lines omitted -->
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/wine_rack_explanation"
android:layout_gravity="center_vertical" />
<GridView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/gvRack"
android:columnWidth="90dp"
android:numColumns="auto_fit" />
</LinearLayout>
<!-- other lines omitted -->
</LinearLayout>
</ScrollView>
The checkbox + string item from the adapter is defined like this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<CheckBox android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/cbCoordinate"
android:checked="true"
/>
<EditText android:id="#+id/txtCoordinate"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
The '+' button item is defined like this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button android:id="#+id/btnAddBottle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/add_bottle_caption" />
</LinearLayout>
I've tried to call invalidate or invalideViews on the GridView after an item is added. Also called invalidate on the TableLayout and TableRow (in the previous layout of the screen). No success.
Any idea why the GridView refuses to extend its height ?
(Note that I am completely open to using an other viewgroup than the GridView)
Use this code
public class MyGridView extends GridView {
public MyGridView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyGridView(Context context) {
super(context);
}
public MyGridView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
}
}
I have done this way:
This code will set GridView height as per number of Child.
Note: Where 5 is number of columns.
private void setDynamicHeight(GridView gridView) {
ListAdapter gridViewAdapter = gridView.getAdapter();
if (gridViewAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
int items = gridViewAdapter.getCount();
int rows = 0;
View listItem = gridViewAdapter.getView(0, null, gridView);
listItem.measure(0, 0);
totalHeight = listItem.getMeasuredHeight();
float x = 1;
if( items > 5 ){
x = items/5;
rows = (int) (x + 1);
totalHeight *= rows;
}
ViewGroup.LayoutParams params = gridView.getLayoutParams();
params.height = totalHeight;
gridView.setLayoutParams(params);
}
Hope this will help you.
Developed on the idea shared by https://stackoverflow.com/users/4233197/hiren-patel, so Thank You :)
Pass you GridView and its number of columns through this function and you are done.
private void setGridViewHeightBasedOnChildren(GridView gridView, int noOfColumns) {
ListAdapter gridViewAdapter = gridView.getAdapter();
if (gridViewAdapter == null) {
// adapter is not set yet
return;
}
int totalHeight; //total height to set on grid view
int items = gridViewAdapter.getCount(); //no. of items in the grid
int rows; //no. of rows in grid
View listItem = gridViewAdapter.getView(0, null, gridView);
listItem.measure(0, 0);
totalHeight = listItem.getMeasuredHeight();
float x;
if( items > noOfColumns ){
x = items/noOfColumns;
//Check if exact no. of rows of rows are available, if not adding 1 extra row
if(items%noOfColumns != 0) {
rows = (int) (x + 1);
}else {
rows = (int) (x);
}
totalHeight *= rows;
//Adding any vertical space set on grid view
totalHeight += gridView.getVerticalSpacing() * rows;
}
//Setting height on grid view
ViewGroup.LayoutParams params = gridView.getLayoutParams();
params.height = totalHeight;
gridView.setLayoutParams(params);
}
When onMeasure() is called for GridView, if heightMode is MeasureSpec.UNSPECIFIED, then the gridview will be as tall as all of it's contained elements (plus some padding).
To ensure that this is the case, you can make a quick custom view extending GridView and including the following override:
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, MeasureSpec.UNSPECIFIED);
}
This is working for me:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/background" >
<!-- MORE LAYOUTS IF YOU WANT -->
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:fillViewport="true" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<!-- MORE LAYOUTS IF YOU WANT -->
<GridView
android:id="#+id/gridview"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="5dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp" >
</GridView>
<!-- MORE LAYOUTS IF YOU WANT -->
</RelativeLayout>
</ScrollView>
</RelativeLayout>
Graham's solution did not work for me. However this one (with a bit more hacking) did: https://stackoverflow.com/a/8483078/479478
This is working for me
public class MyGridView extends GridView {
public MyGridView(Context context) {
super(context);
}
public MyGridView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyGridView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// set childs height to same value as child that has highest value
for(int i=0; i<getChildCount(); i++) {
MyLinearLayout child = (MyLinearLayout) getChildAt(i);
AbsListView.LayoutParams params = (AbsListView.LayoutParams) child.getLayoutParams();
params.height = MyLinearLayout.maxHeight;
child.setLayoutParams(params);
}
// calculate total height and apply to the grid
double numRow = Math.ceil((double) getCount() / (double) getNumColumns());
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) this.getLayoutParams();
params.height = (int) numRow * MyLinearLayout.maxHeight;
this.setLayoutParams(params);
// invalidate after change grid's height
this.invalidate();
}
}
MyLinearLayout class
public class MyLinearLayout extends LinearLayout {
public static int maxHeight = 0;
public MyLinearLayout(Context context) {
super(context);
}
public MyLinearLayout(Context context, #Nullable AttributeSet attrs) {
super(context, attrs);
}
public MyLinearLayout(Context context, #Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (maxHeight<this.getMeasuredHeight()) maxHeight=this.getMeasuredHeight();
}
}
The GridView contains some childs of MyLinearLayout, and this is the layout
<?xml version="1.0" encoding="utf-8"?>
<com.mysystem.view.MyLinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="100dp"
android:layout_height="100dp"
android:background="#ddd"
android:padding="0.5dp"
android:layout_gravity="top"
android:gravity="center_horizontal"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff"
android:padding="20dp"
android:orientation="vertical">
<ImageView
android:id="#+id/img_menu"
android:layout_width="30dp"
android:layout_gravity="center_horizontal"
android:layout_height="30dp"
android:layout_marginTop="5dp"/>
<TextView
android:id="#+id/tv_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:textAlignment="center"
android:textColor="#000"
android:text="Title"
android:textSize="10sp"/>
</LinearLayout>
</com.mysystem.view.MyLinearLayout>