I want to display a text over an Image View. I do it like Alesqui suggested here:
Android Text over image
The preview in Android studio looks fine:
But my actual result looks like this with the text unwantedly above:
I have to add the following XML dynamically to a LinearLayout during the execution:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativelayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="#+id/myImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/myImageSouce" />
<TextView
android:id="#+id/myImageViewText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/myImageView"
android:layout_alignTop="#+id/myImageView"
android:layout_alignRight="#+id/myImageView"
android:layout_alignBottom="#+id/myImageView"
android:layout_margin="1dp"
android:gravity="center"
android:text="Hello"
android:textColor="#000000" />
</RelativeLayout>
I add it the following way:
LinearLayout ll = (LinearLayout) findViewById(R.id.layout_story_covers);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
for (int i = 0; i < stories.size(); i++)
{
// add imageView
RelativeLayout coverLayout = (RelativeLayout) inflater.inflate(R.layout.fragment_cover, null);
ImageView imageView =(ImageView) coverLayout.findViewById(R.id.imageViewCover);
TextView textView = (TextView) coverLayout.findViewById(R.id.textViewCover);
textView.setText(stories.get(i).title);
imageLoader.displayImage(stories.get(i).cover.fileUrl, imageView);
ll.addView(coverLayout);
}
This must have something to do with that parent LinearLayout. What is the proper way to do get the result?
Try this instead:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativelayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/myImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/myImageSouce" />
<TextView
android:id="#+id/myImageViewText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_margin="1dp"
android:gravity="center"
android:text="Hello"
android:textColor="#000000" />
</RelativeLayout>
Tips:
Romain guy said: "I didn’t say don’t use RelativeLayout, you just must be aware of its (possible) impact on performance if used at the top of the tree." Much better to use a simple FrameLayout if you can.
Be aware of the scaleType property in ImageView's
If you want the ImageView to be the same size as the parent then you need to set it as match_parent height and width. If you use wrap content it will depend on the size of the bitmap and the resolution.
Consider using match_parent instead of the deprecated fill_parent
I would prefer Picasso for bitmaps management.
-
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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">
<ImageView
android:id="#+id/myImageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/myImageSouce"
android:scaleType="centerCrop"/>
<TextView
android:id="#+id/myImageViewText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="#dimen/spacing_medium"
android:layout_gravity="center"
tools:text="Test"/>
</FrameLayout>
Related
I am inflating a bottom_sheet_layout. It contains a LinearLayout as the root element. It has one child CardView.
I've tried the following:
setting `android:background` property to
1. #00FFFFFF
2. #00000000
3. #android:color/transparent
setting the background color of LinearLayout programatically
`LinearLayout l = container.findViewById(R.id.root_element);
l.setBackgroundColor(Color.TRANSPARENT);`
This is the BottomSheet.Class that is linked to the bottom_sheet_layout
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.bottom_sheet_layout, container, false);
LinearLayout l = container.findViewById(R.id.root_element);
l.setBackgroundColor(Color.TRANSPARENT);
return v;
}
This is the full bottom_sheet_layout
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout
android:id="#+id/root_element"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_margin="16dp">
<!-- A CardView that contains a TextView -->
<androidx.cardview.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
card_view:cardCornerRadius="4dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/poiName"
android:fontFamily="#font/comfortaa_bold"
android:text="#string/poiName"
android:textSize="20sp"
android:layout_marginTop="20dp"
android:layout_marginLeft="20dp"
android:layout_marginBottom="20dp"/>
<!--Location-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:fontFamily="#font/work_sans_medium"
android:text="#string/ui_location"
android:textFontWeight="800" />
<TextView
android:id="#+id/location"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp"
android:fontFamily="#font/work_sans"
android:text="#string/ui_location_addr" />
</LinearLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginTop="10dp"
android:layout_marginBottom="20dp"
android:layout_marginRight="20dp"
android:src="#drawable/share"
android:scaleType="center"
card_view:backgroundTint="#color/colorPrimary" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
This is the Map Fragment. Here is where I inflate the bottom_sheet_layout
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity" />
Following several guides, I still could not get the #00FFFFFF method to work. Programmatically setting the color to transparent, crashes the application.
It seems that in earlier questions on StackOverflow, setting the background to the hex code with alpha value used to work. Now I only get a dim gray background.
Screenshots of the application
Image Layout
App ScreenShot
If you are not using MapView, I supposed that you are inflating the Google Map + bottom_sheet_layout in the same fragment. If Yes, I think that your issue is not the LinearLayout transparency but you are inserting bottom_sheet_layout to the bottom of the fragment container, not over the map.
You can use this layout for your Map fragment
(androidx, but very similar if you are using android)
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- use this fragment for your google map -->
<fragment
android:id="#+id/google_map"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<!-- use this fragment for your bottom_sheet class -->
<fragment
android:id="#+id/bottom_sheet"
android:layout_margin="16dp" // with this you do not need the LinearLayout root_element
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
Then, you can play with your CardView (or LinearLayout) visibility to show the card or not.
Other layouts are possible like using directly the card view instead of a Fragment.
I think I can help you with some sort of solutions, which you can also try and see if that works or not.
Make use of alpha property in your .java file
Range the value as per your ease
LinearLayout l = container.findViewById(R.id.root_element);
l.setAlpha(0.4);
You can make use of alpha in your XML file too:
<LinearLayout
android:id="#+id/l1"
android:alpha="0.5"
android:layout_width="190dp"
android:layout_height="match_parent">
0.0 is for fully transparent and 1.0 is for fully opaque.
Let me know if any of the solutions work for you. However, do more research here, you will definitely get a solution. Happy coding.
Try background null.
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#null">
......
</LinearLayout>
Are you sure that the child layout elements doesn't have backgrounds?
I managed to implement Cardviews in my app, but the cardview show an unnecessary padding in the top.
What i want to achieve is to get a header image like this :
Here's my cardview Layout file :
<android.support.v7.widget.CardView
android:id="#+id/programCardview"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="match_parent"
card_view:cardUseCompatPadding="true"
xmlns:card_view="http://schemas.android.com/apk/res-auto">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/programHeader"
android:layout_width="match_parent"
android:layout_height="160dp"
android:src="#drawable/createdprogramviewcard"/>
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:paddingBottom="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp">
<TextView
android:id="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="Programme d'endurance"
android:textSize="20sp"
android:textAlignment="center"/>
<TextView
android:id="#+id/objectif"
android:layout_below="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="Objectif : " />
<TextView
android:id="#+id/programObjectif"
android:layout_below="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="6 séances"
android:layout_toRightOf="#id/objectif"/>
<TextView
android:id="#+id/programWorkouts"
android:layout_below="#+id/programTitle"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textAlignment="textEnd"
android:layout_alignParentRight="true"
android:text="6 séances" />
</RelativeLayout>
</LinearLayout>
This is the code of the RecyclerView :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerViewPrograms"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
I manage to change the attribute cardUseCompatPadding but that not affect the internal form of the cardview, it's just there to separate them.
Thanks in advance.
I found a solution for my problem by changing the height of the imageView to 130dp. Apparently since i made the with of the image to match_parent, i had to find the exact height that will suit the image inside the cardview without giving it some extra padding.
The situation is due to two reasons, the first is that the height property of the CardView is in match_parent or in a larger size than the components occupy and at the same time the gravity property of the layout is in center.
To fix it just set the gravity of the LinearLayout to center | fill or just to fill.
I used these below attributes and it works for me.
card_view:cardElevation="0dp"
card_view:cardMaxElevation="0dp"
Or you can just use MaterialCardView instead of legacy CardView
I want to place an imageview on top of mapview/mapfragment. I have successfully placed the imageview, but there is a gap on the left and right of the screen. I want the imageview to completely cover the mapview. The resolution of the image used is 720x1280.
The layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:src="#drawable/sphere_background" />
</RelativeLayout>
The output:
Please tell me a way by which the imageview will completely cover the map from left to right.
Add ImageView in android:scaleType="fitXY". Eg.
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:scaleType="fitXY"
android:src="#drawable/sphere_background" />
If I want to make my TextView width exactly equal to the width of its parent, I can use
android:layout_width="fill_parent"
What about if I want to make it half the width of the part? Or, in general, set the width relative to the parent's width?
Edit: I am using Relative Layout
My screen looks like this.
The quick and dirty way is like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="2">
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#ff0000"
/>
</LinearLayout>
</RelativeLayout>
You have to wrap it in another container, then use only half the weight sum of the parent.
Use android:layout_weight="0.5" it will work for linearLayout
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="1"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:id="#+id/feedback"
android:layout_width="wrap_content"
android:layout_weight="0.5"
android:textSize="15pt" />
You may want to set the weightSum of the parent LinearLayout, something like this:-
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:padding="6dp"
android:weightSum="2">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="#string/hello"
android:layout_weight="1" />
</LinearLayout>
First of all don't use "fill_parent" it a deprecated tearm, use "match_parent".
Secondly where do you want to place the half parent TextView in the parent?
As you are using RelativeLayout this action is a little harder, try to do it from code, some thing like this:
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
int myWidth = (int) (parentHeight * 0.5);
super.onMeasure(MeasureSpec.makeMeasureSpec(myWidth, MeasureSpec.EXACTLY),
heightMeasureSpec);
}
reference: How to size an Android view based on its parent's dimensions
If you want to use RelativeLayout, then best approach is to put a dummy view at the center of the screen and put the first view to the right and second to the left hand side of the dummy view like this;
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_contentt"
android:background="#ff0000"
android:layout_toLeftOf="#id/dummyView/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#ff0000"
android:layout_toRightOf="#id/dummyView"/>
<View
android:id="+#id/dummyView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="invisible"
android:layout_centerInParent="true"/>
</RelativeLayout>
Wrap your TextView with a Linear Layout, like #r-j and #djhacktorreborn have suggested, and then put the whole thing into a Relative Layout.
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,R.layout.activity_haltestellen, R.id.tvHaltestellen, HaltestellenListe);
lvH.setAdapter(arrayAdapter);
this is how the stuff is set and .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" >
<ListView
android:id="#+id/lvHaltestellen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
<TextView
android:id="#+id/tvHaltestellen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
/>
I get the StringArray from a database.
so how can center the tv inside the listview? realy bad thing
Try to add this one: android:layout_centerInParent="true"
<TextView
android:id="#+id/tvHaltestellen"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
I'm not quite sure what do you want to do, but if you want to center the TextView inside the RelativeLayout then remove
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
from TV and try adding something like android:layout_centarInParent="true", and in the relative layout change match_parent to wrap_contents
You could anchor the TextView to the top and bottom of the ListView (and optionally left and right too, depending on the desired effect). That will make the TextView equally tall (and optionally wide), so use a center gravity to position the text in the middle.
<?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" >
<ListView
android:id="#+id/lvHaltestellen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<TextView
android:id="#+id/tvHaltestellen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/lvHaltestellen"
android:layout_alignBottom="#+id/lvHaltestellen"
android:layout_alignLeft="#+id/lvHaltestellen"
android:layout_alignRight="#+id/lvHaltestellen"
android:gravity="center" />
</RelativeLayout>
If you're planning to add a background colour to the TextView, you'll need to wrap it inside another transparent container (e.g. a FrameLayout), to avoid the colour from obscuring what's displayed in the list. Something like:
<?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" >
<ListView
android:id="#+id/lvHaltestellen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/lvHaltestellen"
android:layout_alignLeft="#+id/lvHaltestellen"
android:layout_alignRight="#+id/lvHaltestellen"
android:layout_alignTop="#+id/lvHaltestellen" >
<TextView
android:id="#+id/tvHaltestellen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#android:color/black" />
</FrameLayout>
</RelativeLayout>
Alternatively, if you decide to make the ListView fill up the whole height of the RelativeLayout, you don't need to anchor the TextView to the list anymore. As already pointed out by #user1796624, you can then just center the TextView.
As per your earlier comment on someone else's answer:
the textview is shown inside the listview.
I understand what you're trying to say here, but please do realize that the TextView does not sit inside the ListView, but rather floats on top of it.