I have a ScrollView that contain one imageView
I want this imageView matching the parent width, full width of the screen and then keep ratio aspect, so wrapping the height.
My options where :
- layout_widht : match_parent
- layout_height : wrap_content
- scaletype : centerCrop
Here is the code
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView
android:id="#+id/cellarWineImageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop"
android:src="#drawable/etiquette_unknown" />
</LinearLayout>
</ScrollView>
Here is the result
If I just put a fixe height 348dp the result is here
After fighting, I suspect that the wrap content, consider the original height of the image, doesn't matter if the size change due to match parent of the width. Please help for such basic topic. And I hope we can handle this without making any code...
Based on Akshat Agarwal great answer, we can use simple stuff by extending ImageView into a a new component : AspectRatioImageView, and then reusing it directly in the layout.
package com.yourpackage.widgets;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;
public class AspectRatioImageView extends ImageView {
public AspectRatioImageView(Context context) {
super(context);
}
public AspectRatioImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public AspectRatioImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if (getDrawable() == null)
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
else {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = width * getDrawable().getIntrinsicHeight() / getDrawable().getIntrinsicWidth();
setMeasuredDimension(width, height);
}
}
}
Now to use it in the XML:
<com.yourpackage.widgets.AspectRatioImageView android:layout_centerHorizontal="true"
android:src="#drawable/yourdrawable" android:id="#+id/image"
android:layout_alignParentTop="true" android:layout_height="wrap_content"
android:layout_width="match_parent" android:adjustViewBounds="true" />
This works great on my project, by just changing curent ImageView, by this new packageName. Then everything worked perfectly.
Try putting on LinearLayout, ImageView and ScrollView your android:layout_height="fill_parent" to see if works.
Try this way,hope this will help you to solve your problem.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center">
<ImageView
android:id="#+id/cellarWineImageView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:src="#drawable/ic_launcher"
android:scaleType="fitXY" />
</LinearLayout>
change the layout like this
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:minHeight="348dp"
android:orientation="vertical" >
<ImageView
android:id="#+id/cellarWineImageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop"
android:minHeight="348dp"
android:src="#drawable/ic_launcher" />
</LinearLayout>
Related
I'm trying to create this view:
It´s Rerecyclew with a Gridview for each item.
So when you press the plus item I've to add a new item to the Gridview and adjust the RecyclewView item height.
But i can't make it with a wrap_content and i don´t know why.
Activity Layout
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_scenes"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
</LinearLayout>
RecyclewView Item
<?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="wrap_content"
android:orientation="vertical">
<GridView
android:id="#+id/gv_scene_items"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:numColumns="3"
android:gravity="center"
android:columnWidth="50dp" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#eaeaea" />
</LinearLayout>
GridView Item (just for example)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="55dp"
android:layout_height="55dp"
android:background="#color/liloColorBlue">
</LinearLayout>
Can you help me to get the example view?
Thank you.
You can do this very easily.
Change the recyclerView height in xml to:
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_scenes"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical" />
This will automatically adjust the layouts.
Hope this helps.
Call the notifyDataSetChanged() or notifyItemChanged(int position) methods of the RecyclerView.Adapter from the MAIN THREAD.
I hope this can help you
I found the solution creating my own gridview like this:
public class ScenesGridView extends GridView {
public ScenesGridView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ScenesGridView(Context context) {
super(context);
}
public ScenesGridView(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 want to show all the pictures posted by user's in a gridview in one of my Activities. These are my codes and I am having the result in the picture below. I specified the width and height of each of the pictures in gridview(90dp,90dp), but it doesn't follow.They are being populated as their uploaded size (landscape/portrait). Also even after setting the height of the gridview to wrap_content, the height stays like the picture(about 200dp may b). How do I solve this? Where did I do wrong ?
Model of each picture:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="90dp"
android:layout_height="90dp"
app:srcCompat="#drawable/post2"
android:id="#+id/imageView2"
android:scaleType="centerCrop"
android:layout_margin="0dp"/>
</RelativeLayout>
My Gridview in another activity:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/content_competition_user"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="8dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.golstars.www.glostars.competitionUser"
tools:showIn="#layout/activity_competition_user">
<GridView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:columnWidth="90dp"
android:numColumns="3"
android:verticalSpacing="8dp"
android:stretchMode="columnWidth"
android:horizontalSpacing="8dp"
android:id="#+id/competitionusergrid"
/>
</ScrollView>
My Adapter :
MyUser mUser = MyUser.getmUser();
mUser.setContext(this);
Picasso.with(this).load(mUser.getProfilePicURL()).into(profileFAB);
targetList = new ArrayList<>();
targetAdapter = new GridAdapter(getApplicationContext(), targetList);
competitionusergrid.setAdapter(targetAdapter);
String target = "";
target = this.getIntent().getStringExtra("LOAD_TARGET");
System.out.println(target);
if(target.equals("COMPETITION")){
//if we have competition pics
if(targetList.isEmpty()){
ArrayList<String> aux = this.getIntent().getStringArrayListExtra("COMPETITION_PICS");
System.out.println("target list - " + aux);
for(int i = 0; i < aux.size(); i++){
targetList.add(aux.get(i));
targetAdapter.notifyDataSetChanged();
}
}
How it looks : UI
Use GridView Setup with all images are same width & height.
Use RecyclerView insteadof GridView, RecyclerView is same as GridView & easy to implement.
If you want to use current code, then you may use the following ImageView,
public class SquareImageView extends ImageView {
public SquareImageView(Context context) {
super(context);
}
public SquareImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SquareImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, widthMeasureSpec);
}}
And, the layout of each item,
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:srcCompat="#drawable/post2"
android:id="#+id/imageView2"
android:scaleType="centerCrop"
android:layout_margin="0dp"/>
</RelativeLayout>
I have a layout which contains only a LinearLayour with 3 buttons inside.
I would want this 3 buttons to fill the screen vertically so I used "weigth=1" but I should also want the buttons to be square, that is, that their width is equal to their height.
Any way to do it?
Here's the .xml file
<?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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="android.jose.se.Prueba"
android:background="#drawable/bg"
android:gravity="center">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<Button
android:id="#+id/bHet"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#drawable/layer1"
android:onClick="cambiarBoton"/>
<Button
android:id="#+id/bGay"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#drawable/layer2"
android:onClick="cambiarBoton"/>
<Button
android:id="#+id/bLesbi"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#drawable/layer3"
android:onClick="cambiarBoton"/>
</LinearLayout>
</RelativeLayout>
I had similar issue and done it using Google's Percent Relative Layout that helps you manage view aspect ratio.
You can use it like this
<android.support.percent.PercentRelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="match_parent"
app:layout_aspectRatio="100%"/>
</android.support.percent.PercentFrameLayout>
The best way to do this, is to make a new Class called Square button and this class should extend Button. Then in the onMeasure of this class, simply make your heightSpec as WidthSpec.
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 defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
protected void onMeasure(int WidthSpec, int HeightSpec){
int newWidthSpec = HeightSpec ;
super.onMeasure(newWidthSpec, HeightSpec);
}}
Now you can use this SquareButton instead of a normal Button in your xml like this. The value of android:width attribute will be ignored.
<com.example.package.SquareButton
android:height = "0dp"
android:weight = "1"
android:width = "0dp"
/>
I have a ListView with an ImageView and TextView, I want to set the width of the image as 2/3 of the screen.
How do I create a custom ImageView to do this? This is what I've tried so far.
Custom View
public class CustomImageListView extends ImageView {
public CustomImageListView(Context context) {
super(context);
}
public CustomImageListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomImageListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// Snap
// to
int width = MainActivity.width;
int height = MainActivity.height;
int w = width *2/5;
int h = w *4/6;
setMeasuredDimension(w, h);
// setMeasuredDimension(ChoseImage.width, ChoseImage.height); // Snap to
// //
// width
}
}
The custom View XML
<tuannt.tinmoi.custom.CustomImageListView
android:id="#+id/ivAvater"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/nomage" />
You can define a horizontal linear layout with WeightSum = 3 and inside it put another layout with with layout_weight = 1, the remaining portion will be of weight = 2, so you can put your imageView there. Refer below:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/fullscreen"
style="#style/translucent"
android:orientation="horizontal"
android:weightSum="3">
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_gravity="right"
android:gravity="center"
android:background="#88000000"
android:id="#+id/sidebar"
android:layout_weight="1" >
</RelativeLayout>
<!-- other views, with a total layout_weight of 2 -->
</LinearLayout>
You don't need to create a Custom View to achieve this. You can make use of the layout_weight attribute.
This would be your layout for every item in the ListView.
item_in_listview.xml:
<?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="horizontal">
<ImageView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
The layout_weight attribute is explained in this question.
In a nutshell, layout_weight specifies how much of the extra space in
the layout to be allocated to the View.
My app needs the height and width of the extended ImageView. I thought this should work:
package my.android.test;
public class TestImageView extends ImageView
{
private int mWidth=0;
private int mHeight=0;
public TestImageView(Context context, AttributeSet as)
{
super(context, as);
final String xmlns="http://schemas.android.com/apk/res/android";
mWidth = as.getAttributeIntValue(xmlns, "layout_width", 0);
mHeight = as.getAttributeIntValue(xmlns, "layout_height", 0);
}
#Override
protected void onDraw(Canvas canvas)
{
//do stuff
}
}
but it doesn't work. 0 is returned by getAttributeIntValue() eventhough the layout_height is defined in the layout XML:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true"
android:background="#fffcb95a"
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
<FrameLayout android:layout_width="fill_parent"
android:layout_height="wrap_content"
<RelativeLayout android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="6dip"
<my.android.test.TestImageView
android:id="#+id/TestImageViewID"
android:layout_width="100dip"
android:layout_height="100dip"
android:src="#drawable/icon"
android:scaleType="centerCrop" />
</RelativeLayout
</FrameLayout
</LinearLayout
</ScrollView
what to do ?
Note an explanation for why the original attempt doesn't work -- layout_width and layout_height are not actually holding integers, they are holding dimensions. You need to retrieve these via Context/Theme.obtainStyledAttributes, so you can get them as a TypedValue that can be converted to pixels.
Just call getWidth() and getHeight().