I'm new to Android programming and I'm facing a problem: I don't know how to set the position of an imageView over another imageView. I want the position to be relative, maybe with percentages, to maintain the aspect on different screens or in both landscape and portrait.
thank you!
to place an Image over another use relativelayout as the root layout for both image views. This will make both image views start at the same coordinate and you can flexibly arrange them as you like.
example :
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
>
<ImageView android:id="#+id/videoImage"
android:layout_width="match_parent"
android:layout_height="170dip"
android:layout_centerHorizontal="true"
android:scaleType="fitXY"/>
<ImageView
android:id="#+id/playVideo"
android:src="#drawable/play_"
android:layout_width="30dip"
android:layout_height="30dip"
android:layout_centerInParent="true"
android:layout_centerHorizontal="true"/>
Alternatively you can use frame layout.
Related
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv_sales_report"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="20dp"
android:clipToPadding="false"
android:paddingHorizontal="10dp"
android:paddingBottom="120dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/mtv_sales_report_date"
tools:listitem="#layout/item_reportings_new" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/rv_dynamic_inner_reporting"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="vertical"
android:paddingBottom="10dp"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintTop_toBottomOf="#id/mtv_date_dynamic"
tools:listitem="#layout/item_inner_reporting" />
The inner recycler view is not scrolling I have tried many solutions, non helped me, how can I make the inner recycler view scroll vertically, they both scroll vertically.
android:layout_height="0dp" You shouldn't use this without setting either the layout weight or without constraining both the top and bottom of the view because without constraints, it might just act as wrap_content basically extending beyond the screen.
Also, for the inner view, if the orientation is vertical, then height shouldn't be wrap_content maybe changing that would help.
Also, just a tip, having both recycler be vertical is a bad idea because how would android (or the user) know which view you are scrolling on if they are together.
Issue is solved by showing only four items in the inner Recycler View, and enabling nestedScrollView = true, also handling OnTouch Events for the parent Recycler View.
My code below doesnt work for each specific scrollto or smoothScrollTo, can anyone help me?
I basically want to be able to dynamically scroll to a specific Item position in the activity, e.g. if a specific recyclerviewItem has been clicked on it will go to the activity and scroll to the specific item. The position variable has been ranging from "recyclerview.getChildAdapterPosition(itemview)" to itemview.Bottom which also doesn't work.
Help would be appreciated.
private fun focusOnView(scroll: ScrollView, itemView : View?,position :Int) {
scroll.post(Runnable {
if (editBox != null) {
val x= 1
// scroll.scrollTo(0,NestedScrollView.FOCUS_DOWN)
// scroll.smoothScrollTo(0, scroll.bottom)
scroll.smoothScrollTo(0,position)
//scroll.fullScroll(130)
}
})
}
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/scrollView"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/contentreyclerpager"
android:layout_width="match_parent"
android:paddingTop="10dp"
android:layout_height="wrap_content" />
</RelativeLayout>
</ScrollView>
Why you use the nestedScollView smoothScrollTo with the position you have to give x,y coordonate i think in your case you can use recycleView.smoothScrollToPosition(yourPosition);
I am trying to build a gallery for my app. Following some tutorials and stackoverflow, I finally managed to make the gallery. I am using Glide to set images, so no issue of memory crashing and all. The only problem is, when I fling, Images are not set into their views as fast as those views are being shown. Here is a gif. So I get to see the placeholders or the background of the recyclerview while imageviews are being set. Depending on the fling speed, this may last for 500-1000ms. But that is sufficient to make the gallery look bad. This happens when I use fling to scroll up or down. To my knowledge, this is because glide freeing the images from it's cache. Is there any solution for it.
Here is my code.
activity_gallery:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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/activity_monuments"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".GalleryActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerview_gallery"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:alwaysDrawnWithCache="true"
android:clipToPadding="false"
android:scrollbars="vertical"
android:scrollbarStyle="insideOverlay"/>
</LinearLayout>
Here is how I am setting recyclerview:
RecyclerView gridView = (RecyclerView)findViewById(R.id.recyclerview_gallery);
gridView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getApplicationContext(),NUM_OF_COLUMNS);
gridView.setLayoutManager(layoutManager);
gridView.isDrawingCacheEnabled();
gridView.addItemDecoration(new MarginDecoration(GalleryActivity.this, NUM_OF_COLUMNS, GRID_PADDING, true));
gridView.setHasFixedSize(true);
gridView.setVerticalScrollBarEnabled(true);
gridView.setBackgroundColor(getResources().getColor(R.color.colorBlack));
GalleryAdapter galleryAdapter = new GalleryAdapter(GalleryActivity.this, GalleryActivity.this, ImageNamesList, columnWidth);
gridView.setAdapter(galleryAdapter);
Here is how I am setting imageview in adapter:
viewHolder.galleryImage.setLayoutParams(new GridView.LayoutParams(imageWidth, imageWidth));
Glide.with(context)
.load(uri)
.asBitmap()
.placeholder(R.drawable.monument)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(viewHolder.galleryImage);
Please let me know of the possible solutions.
P.S: The gif is low frame rate and hence showing the slow fling which is not the case.
To solve cache management, i use a singleton store best practice. Realm for android is perfect it is NoSql and super fast, what i normally do is create a realm object, in the adapter check if the current url is in realm, if true dont pull new image else, pull and store.
Then when the main activity or fragment is ever being destroy just delete all from realm.
I've been looking in Stackoverflow how to integrate an AdView inside a RecyclerView. I've been following these posts:
One, two
Basically the way to do it is calling loadAd inside onCreateViewHolder or inside the constructor of the ViewHolder.
Either way, this is my implementation:
JAVA
public class AdExpressViewHolder extends RecyclerView.ViewHolder {
public AdExpressViewHolder(View itemView) {
super(itemView);
final AdView adView = (AdView)itemView.findViewById(R.id.adView);
AdRequest request = new AdRequest.Builder()
.build();
adView.loadAd(request);
}
}
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="match_parent"
xmlns:ads="http://schemas.android.com/apk/res-auto">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true">
<com.google.android.gms.ads.AdView
android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
ads:adUnitId="**********************"
ads:adSize="BANNER">
</com.google.android.gms.ads.AdView>
</RelativeLayout>
</RelativeLayout>
The problem is: when I scroll the RecyclerView, it seems to load on the UI thread since it gets stuck, only the first time. The rest of the times is ok.
This is the video that demonstrates it:
Video
As you can see, the first one is blocking the UI, but not the second one.
What am I doing wrong?
Thank you in advance.
EDIT
I've tried to load a conventional AdView in an activity, fixed. It works and it doesn't seem to be load in the UI Thread. Seems it's just happening in the RecyclerView.
After 3 weeks, I've done a Method profiling, and this is what I've got out:
You can realise the red spots. Those are 2 different AdView loading, while the rest are 38 normal custom views of mine.
To be more concrete, these are the functions, so it's regarding 100% the AdView:
It seems a bug of the Ads SDK for Android and it's not been fixed, at least until v9.4.0.
More information here:
https://groups.google.com/forum/#!searchin/google-admob-ads-sdk/ui$20thread%7Csort:relevance/google-admob-ads-sdk/k4IFZA_QGT4/3gMHaCPPBQAJ
I'm trying to create a custom "loading/throbber" icon for my app. I have an ImageView that points to my "loading" icon:
The problem is the rotation is off axis and looks "wobbly", but I'm not sure what I'm doing wrong:
<ImageView
android:id="#+id/headerReload"
android:src="#drawable/reload"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="5dip"
android:onClick="headerReload_onClick"
android:layout_alignParentRight="true"
/>
public void headerReload_onClick(final View v) {
ImageView searchSpinner = (ImageView)findViewById(R.id.headerReload);
Animation spinnerAnimation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.loading);
searchSpinner.startAnimation(spinnerAnimation);
}
loading.xml
<?xml version="1.0" encoding="UTF-8"?>
<rotate
xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="0"
android:toDegrees="360"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="infinite"
android:interpolator="#android:anim/linear_interpolator"
android:duration="1200"
/>
5dp padding on the right side will cause it to rotate unevenly