We are using android API 17 in our application. I have defined a layout containing two images vies as below:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/image_container_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/image_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/image_1_resource"/>
<ImageView
android:id="#+id/image_2"
android:layout_marginTop="3dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/image_container_layout"
android:src="#drawable/image_2_resource"/>
This layout is included inside another layout as below:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
style="#style/wizard_content_style"
tools:context=".ui.Wizard"
android:orientation="vertical"
android:gravity="center_vertical"
android:layout_gravity="center_vertical"
>
<include layout="#layout/image_container_layout"
android:id="#+id/included_view"
/>
<TextView
style="#style/wizard_content_text_style_medium"
android:id="#+id/text_description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/included_view"
android:layout_centerHorizontal="true"
android:gravity="center_horizontal"
android:layout_gravity="center_horizontal"
android:text="#string/instruction"
android:layout_marginBottom="15dp"/>
The reason that the layout is included is that we want to reuse it in two more layouts.
Now based on some condition I want to hide or show the image views inside image_container_layout.
The java code looks like this:
containerLayout = (ViewGroup) ((Activity) getAndroidContext()).getLayoutInflater().inflate(R.layout.image_container_layout, null);
image1 = (ImageView) containerLayout.findViewById(R.id.image_1);
image2 = (ImageView) containerLayout.findViewById(R.id.image_2);
switch (accuracy) {
case 1:
log().i(getClass().getSimpleName(), "case 1 chosen");
image1.setVisibility(View.VISIBLE);
image2.setVisibility(View.GONE);
log().i(getClass().getSimpleName(), "image 1 has been shown");
break;
case 2:
image1.setVisibility(View.GONE);
image2.setVisibility(View.VISIBLE);
break;
case 3:
image1.setVisibility(View.VISIBLE);
image2.setVisibility(View.VISIBLE);
break;
}
I am debugging this code and I am sure the code is running. The log messages are printed in Logcat as well, but nothing happens no change in the images. Also, both images are always shown.
I wonder if there is something that I have to do when working with the included layout?
Thanks for any help in advance.
Based on answers I got below, seems that inflating a view will create a new object and because of this, changes in the visibility are not shown on the user interface.
Then the question is that if we have a wizard and inside 3 different pages of the wizard I want to have an image and depending on some condition I want to show or hide the image, what is the best solution? I mean I want to reuse the code which is responsible for hiding and showing the image regardless which page of wizard is active.
Why are you complexing with so much code. If you include some layout in your xml then you can use those widgets also same as the xml have. There is no need to inflate.
ImageView image_2 = findViewById(R.id.image_2);
image_2.setVisbility(Visible.GONE);
You said at this comment the code not inside activity but wherever it is you inflated a new layout to your view currently displaying by this line:
containerLayout = (ViewGroup) ((Activity) getAndroidContext()).getLayoutInflater().inflate(R.layout.image_container_layout, null);
When you try to change visibility of those images actually it works, i think so. But if your activity or fragment layout contains image_container_layout maybe you see
those images.
And I wonder that what do you do with inflated view containerLayout. Do you add it to inside of any other view. If you dont it wont be visible for you.
you have to use it like this:
View included_view1 = findViewById(R.id.included_view1);
ImageView image_1 = included_view1.findViewById(R.id.image_1);
ImageView image_2 = included_view1.findViewById(R.id.image_2);
image_1.setVisibility(View.VISIBLE);
image_1.setVisibility(View.GONE);
image_2.setVisibility(View.VISIBLE)
image_2.setVisibility(View.GONE)
View included_view2 = findViewById(R.id.included_view2);
ImageView image_11 = included_view2.findViewById(R.id.image_1);
ImageView image_22 = included_view2.findViewById(R.id.image_2);
image_11.setVisibility(View.VISIBLE);
image_11.setVisibility(View.GONE);
image_22.setVisibility(View.VISIBLE)
image_22.setVisibility(View.GONE)
Above code will be helpful in the case of multiple time you want to use same layout.
Related
So in my program, I want to generate CardViews dynamically on a predefined Layout that I intend to place inside a LinearLayout with horizontal orientation, which is inside a horizontal ScrollView. Everything in the code works fine except:
cv.setRadius(Tools.convertDpToPx(context,5));
[cv is a CardView Object]
[Tools.convertDpToPx(context,float) resides in Tools as static function and returns translated values in Pixels from DP]
Tried getting cv.getRadius() to check if my values are getting assigned, and they are.
Does anyone have an idea why the setRadius() is not working?
IMPLEMENTATION OF CODE
CardView cv = new CardView(context);
// Set external card view wrapper(cv) properties
CardView.LayoutParams cvlp=new CardView.LayoutParams(Tools.convertDpToPx(context,155),Tools.convertDpToPx(context,200));
cvlp.leftMargin=Tools.convertDpToPx(context,10);
cv.setLayoutParams(cvlp);
cv.setBackground(new ColorDrawable(Color.parseColor("#002038")));
cv.setPreventCornerOverlap(false);
cv.setRadius(Tools.convertDpToPx(context,5));
//And more elements added to Card View Layout
cv.setId(View.generateViewId());
Adding a Background or Background Color to a CardView will remove Rounded Corners.
My solution: add a LinearLayout(or other) inside the Cardview ,change backgroundColor of LinearLayout instead using setBackgroundColor
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:cardCornerRadius="12dp"
>
<LinearLayout
android:id="#+id/video_card_duration_size"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
...
</LinearLayout>
</androidx.cardview.widget.CardView>
in java code
linearLayout.setBackgroundColor(SurfaceColors.SURFACE_2.getColor(context));
I want to insert an image to an ImageView, which gets used as a background. This background is in a RecyclerView. When it gets loaded the first time, it looks like this:
But when I scroll to another item and scroll back, it looks like this (it should always look like this):
Here i add the image:
public void onBindViewHolder(StoryViewHolder holder, int position) {
holder.cardView.setMinimumHeight(height/3);
holder.layout.setMinimumHeight((int) ((float) width / 4));
//set image
Picasso.with(activity).load(MainPostAdapter.URL + 140 + ".png").
transform(new BlurTransform(holder.background.getContext())).fit().centerCrop().into(holder.background);
holder.background.setAlpha(0.25f);
}
And this is the image itself:
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/story_view_background"/>
What could the problem be?
EDIT:
whole XML (It doesn't show all of the code. Here is also pastebin:http://pastebin.com/8rJvSx7V):
<?xml version="1.0" encoding="utf-8"?>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/story_view_background"/>
<RelativeLayout
android:id="#+id/story_view_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="50px">
<ImageView
android:id="#+id/story_view_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:id="#+id/story_view_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="13sp"
android:layout_below="#+id/story_view_image"
android:paddingBottom="8dp"
android:paddingTop="8dp"
android:gravity="center_horizontal"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
</FrameLayout>
try to set android:layout_height="150dp" for your CardView (don't use px!). Its child FrameLayout is unnecesarry (CardView is extending FrameLayout and have set same attributes set), remove it.
It's not so well written, all your Views have match_parent set for height, besides Image and Text views... Your item is probably trying to fit RecyclerView height in this case ("whole screen") and is measured without image at first time (Picasso async downloading, setting image when view is already measured). But when you inflate your View again (scroll and recycle) new list item will be measured differently, because Picasso will insert your image "in runtime", no need to async fetching (cache)
I have a relative layout:
RelativeLayout battle_layout = (RelativeLayout) findViewById(R.id.battle);
I need to attach here a child (a JPG image from resources/drawable).
I was writting in c# and javascript earlier, but here it's a bit harder to accomplish :)
Is there someone who could help me? Thanks!
Maybe you can use one of these options. programmatically or in xml:
Add a ImageView to your layout
Set the image as background of your layout
Layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/YOUR_IMAGE">
<ImageView
android:src="#drawable/YOUR_IMAGE"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
Code
ImageView imageView = new ImageView(this);
image.setImageResource(R.drawable.YOUR_IMAGE);
battle_layout.addView(image);
I'm trying to set an imageview's resource like so:
Code:
ImageView imageView = new ImageView(getApplicationContext());
imageView.setImageResource(R.drawable.bg);
Yet I see nothing on my screen.
I can set
imageView = (ImageView) findViewById(R.id.bgView);
And it works, but in my instance I can't use this because I need apply the imageview to an arraylist of imageviews.
Is there any other way to construct my imageview or am I doing something wrong?
Edit:
My xml looks like:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/entire_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/black"
tools:context="com.example.guilyan.Game" >
<ImageView
android:id="#+id/bgView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:contentDescription="#string/Descript"
android:scaleType="fitXY"
android:src="#+drawable/testpicks" />
</FrameLayout>
I think u should add the dynamically created image view to your layout.just try this.Suppose if your layout id is frameLayout then
frameLayout.addView(imageView);
Using of
new ImageView(getApplicationContext()); not correct.
You need use activity context, not application.
And of course after initialization of view you need attach it to parent.
I'm stuck on a problem and I don't know, what causes it.
I have a very simple Layout like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/my_text_view"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_gravity="NOTE_THIS"
android:textColor="#FFFFFF"
android:textSize="22dp"
android:text="TestText"/>
</LinearLayout>
which is included inside another layout. If I change the gravity inside the xml I see same Result in Layout-Editor and on my phone. If I wanna apply the Gravity programatically like with myTextView.setGravity(Gravity.CENTER) it doesn't Change anything. And I cannot set LayoutGravity in Java on a TextView
I'll tried for debug purposes to include them three times each with another gravity which does work even. So I assume everything is alright with my Layout and there has to be a Bug or something else I miss.
Can someone give me a hint what I also can try, or what causes this problem?
Set your TextView's width as android:layout_width="fill_parent" then you can set it programmatically using myTextView.setGravity(Gravity.CENTER)
You need to set the gravity of the LayoutParams object instead of the View itself:
TextView tv = new TextView(getApplicationContext());
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);
lp.gravity = Gravity.CENTER;
tv.setLayoutParams(lp);
When you use LinearLayout as parent, then layout_gravity comes in picture which align control but not content inside the control so,
Instead using android:layout_gravity use android:gravity.