Develop Reference

GridView rows height are not same size

In my app I use a GridView but my values for each cells are not same size, when I put my values in GridView, it automatically set a size for all cells(I think it consider first cell height for all cells), can you tell me how can I fix that?
GridView Adapter:

You should try to use custom view your row Item in Gridview
public class SquareRelativeLayout extends RelativeLayout {
public SquareRelativeLayout(Context context) {
super(context);
}
public SquareRelativeLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SquareRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
if (widthMeasureSpec < heightMeasureSpec)
super.onMeasure(widthMeasureSpec, widthMeasureSpec);
else
super.onMeasure(heightMeasureSpec, heightMeasureSpec);
}
}
In GridView row XML
<SquareRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/image"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:adjustViewBounds="true"
android:contentDescription="#string/descr_image"
android:scaleType="centerCrop" />
</SquareRelativeLayout>
Hope this helps you.

I suggest please use RecyclerView with StaggeredGridLayoutManager, Throw this you can get layout same which you draw upside,
This is the link which will help you:
https://android--code.blogspot.in/2015/12/android-recyclerview.html

How to set ImageView height and width before image is loaded with Picasso inside Recycerview StaggeredGridLayout

I am looking to set the ImageView height before loading the image with Picasso. Trying to prevent the parent view from changing its height to the image. I am getting a height and width of the image and setting it inside of of Picasso and then scaling it down.
How do I scale the ImageView based on the "webformatHeight" and "webformatWidth" before loading the image with Picasso to prevent resizing.
Data
{
...
"hits":[
{
"webformatHeight":426,
"webformatWidth":640,
"webformatURL":"https://pixabay.com/get/eb32b5062dfd013ed95c4518b74a4291ea77ead204b0144190f8c478a2ebb3_640.jpg",
...
},
...
]
}
Recycler Implementation
RecyclerView recycler = (RecyclerView) findViewById(R.id.recycler);
mPixabayAdapter = new PixabayAdapter();
recycler.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
recycler.setAdapter(mPixabayAdapter);
ViewHolder
class ViewHolder extends RecyclerView.ViewHolder {
private ImageView mImage;
private TextView mTitle;
private ViewHolder(View view) {
super(view);
mImage = view.findViewById(R.id.image);
mTitle = view.findViewById(R.id.title);
}
void bindView() {
ColorDrawable[] shotLoadingPlaceholders = new ColorDrawable[]{new ColorDrawable(ContextCompat.getColor(itemView.getContext(), R.color.background_light))};
Hit hit = mHitList.get(getAdapterPosition());
mTitle.setText(hit.getUser());
Picasso
.with(mImage.getContext())
.load(hit.getWebformatURL())
.placeholder(shotLoadingPlaceholders[0])
.resize(hit.getImageWidth(), hit.getImageHeight())
.priority(Picasso.Priority.HIGH)
.onlyScaleDown()
.into(mImage);
}
}
XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true" />
<TextView
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="48dp"
android:layout_below="#+id/image"
android:background="#color/background_light"
android:fontFamily="sans-serif-medium"
android:gravity="center_vertical"
android:maxLines="1"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:textColor="#color/white_light"
android:textSize="13sp" />
</RelativeLayout>

Calc the aspect ratio of your image by width/height and wrap your ImageView inside something like this:
public class RelativeSizeLayout extends FrameLayout {
private float aspectRatio = 1.77f;
public RelativeSizeLayout(Context context) {
this(context,null);
}
public RelativeSizeLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public RelativeSizeLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
public boolean shouldDelayChildPressedState() {
return false;
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int width = MeasureSpec.getSize(widthMeasureSpec);
heightMeasureSpec = MeasureSpec.makeMeasureSpec((int) (width / aspectRatio), MeasureSpec.EXACTLY);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
public void setAspectRatio(float ratio) {
aspectRatio = ratio;
}
}

you can set the layoutParams of the ImageView on the bindView with the width and hight the Hit class like this.
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(hit.getImageWidth(), hit.getImageHeight());
mImage.setLayoutParams(layoutParams);
regards.

How to make a list of square buttons with autoresize?

I am developing an app that displays a page with a variable number of square buttons, like the second picture of "Square MIUI":
Square MIUI on APP store
I need displaying only three columns of square buttons, and make the entire list scrollable.
I'm trying first with plain XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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" >
<ScrollView
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="center"
android:layout_weight="1.19"
android:orientation="horizontal" >
<TableLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" >
<TableRow
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_weight="1" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Title"/>
</TableRow>
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<!-- Icon buttons here -->
</TableRow>
</TableLayout>
</ScrollView>
<Button
android:layout_width="fill_parent"
android:layout_height="48dp"
android:text="Button" />
</LinearLayout>
For every button (4 TableRow of 3 buttons, images are square .png made with Eclipse icon generator)
EDIT: checked, icons of all screen densities are square
<Button
android:layout_margin="4dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="image"/>
but the buttons on my tablet are square, and on my phone are wider than tall (stretched on X-axis).
What I'm doing wrong?
TODO: code a variable button number.
Thanks in advance.
EDIT:
I tried this code:
private void squareButton() {
square(R.id.b1);
square(R.id.b2);
....
square(R.id.b<N>);
}
private void square(int id) {
ImageButton temp=(ImageButton) findViewById(id);
int l=temp.getWidth();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int Measuredwidth = metrics.widthPixels;
l=(int) (Measuredwidth/4);
temp.setMaxWidth(l);
temp.setMaxHeight(l);
temp.setMinimumWidth(l);
temp.setMinimumHeight(l);
LayoutParams param = temp.getLayoutParams();
param.width = l;
param.height = l;
temp.setLayoutParams(param);
temp.requestLayout();
}
But I'm still getting weird buttons on phone (Gingerbread)...
I can't rely only on the auto-sized icons (too little on my tablet, too big on my phone)
EDIT:
I'm looking for a code that:
squares button
has user-definable width
works with Gingerbread
In my case, button_width = widthPixels/4;
Thank you in advance.

Implements you own square button class like this:
public class SquareButton extends Button {
public SquareButton(Context context) {
super(context);
}
public SquareButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SquareButton(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth()); // Snap to width
}
}

Finally, I found a solution using GridView.
First, I follow the GridView tutorial
Then I got some code from other answers.
Now this code creates a scrollable and clickable big square icon list, resized according to screen size. When one icon is clicked, changes his image.
Thank you Lubos for your suggestion.
[main activity]
public class Grid extends Activity {
public boolean audio=true;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_grid);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
// load icons on grid
ImageAdapter.loadImages(new Integer[] {
R.drawable.ic_blu_voice_on,
R.drawable.ic_blu_help,
R.drawable.ic_blu_save,
R.drawable.ic_blu_load
});
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View imgView, int position, long id) {
ImageView image=(ImageView) imgView;
switch (position) {
case 0:
// switch voice icon on/off when clicked
image.setImageResource(voice());
break;
}
Toast.makeText(Grid.this, "" + position, Toast.LENGTH_SHORT).show();
}
});
}
private int voice() {
audio=!audio;
if (audio) return R.drawable.ic_blu_voice_on;
return R.drawable.ic_blu_voice_off;
}
}
[imageadapter.java]
public class ImageAdapter extends BaseAdapter {
private Context mContext;
// reference to images (dummy)
private static Integer[] mThumbIds = {0,0};
private float px;
public ImageAdapter(Context c) {
mContext = c;
//Calculation of ImageView Size - density independent.
Resources r = Resources.getSystem();
px = r.getDisplayMetrics().widthPixels;
px=px/3;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
public static void setImage(int position, int id) {
mThumbIds[position]=id;
}
public static void loadImages(Integer[] images) {
mThumbIds = images;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams((int)px, (int)px));
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
}
[activity_grid.xml]
<RelativeLayout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:orientation="vertical"
tools:context="${packageName}.${activityClass}">
<LinearLayout
android:id="#+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:id="#+id/testo1"
android:layout_width="fill_parent"
android:layout_height="48dp"
android:gravity="center_horizontal"
android:text="#string/hello_world"
android:textSize="30sp" />
<GridView
android:id="#+id/gridview"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:columnWidth="120dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="spacingWidthUniform">
</GridView>
<Button
android:id="#+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello_world"
android:textSize="30sp" />
</LinearLayout>
</RelativeLayout>

Square cells in GridView

I'm using GridView in my app:
<GridView
android:id="#+id/main_grid_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:numColumns="4" >
</GridView>
Every cell in this GridView is ImageView:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/img"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:contentDescription="#string/img"
android:scaleType="centerCrop" />
</RelativeLayout>
All cells in my GridView must be square (height must equals width) and image must fit cell. But it always looks like rectangle... How I can to implements square cells in GridView?

Make sure your cell is square.
For this, you can set the width and height of the RelativeLayout programmatically with the value screen_width/4.

This can do the trick
#Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
int size = width > height ? height : width;
setMeasuredDimension(size, size);
}

As mentioned in the answer here - Gridview with two columns and auto resized images
You can make a custom ImageView for this
public class SquareImageView extends ImageView {
public SquareImageView(Context context) {
super(context);
}
public SquareImageView(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
}
public SquareImageView(Context context, AttributeSet attributeSet, int defStyle) {
super(context, attributeSet, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth());
} else {
setMeasuredDimension(getMeasuredHeight(), getMeasuredHeight());
}
}
}
and then use this in your grid view cell layout as
<package_containing_SquareImageView.SquareImageView
android:layout_width="match_parent"
android:layout_height="match_parent" />

GridView Stretching ImageView Non-Uniformly

I have a GridView that I am using to display a row of 4 images, each image is 200 x 200 pixels. Here is the layout xml:
<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"
tools:context=".MainActivity" >
<GridView
android:id="#+id/myGridView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:numColumns="4" >
</GridView>
</RelativeLayout>
When I run my app here is what the images look like:
As you can see the images are getting scaled (narrowed) to fit the screen.
How do I make it so the images are stretched both vertically and horizontally to maintain the correct aspect ratio?
Note that I am using an adapter to draw the images:
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
imageView = new ImageView(context);
} else {
imageView = (ImageView) convertView;
}
imageView.setBackgroundResource(imageIds[position]);
return imageView;
}

I got the same issue in last weak.Use my image view class and solve this issue.
public class iv_autoSizedImageView extends ImageView {
public iv_autoSizedImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
try {
getLayoutParams().height = getMeasuredWidth();
} catch (Exception e) {
// TODO: handle exception
}
}
}
layout.xml
<com.sample.test.iv_autoSizedImageView
android:id="#+id/IV_NEWS_IMAGE"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>