How can I specify that this ImageView have to be shown smaller?

Question

I am absolutly new in Android development and I am findig the following problem working on my first app.

My problem is related to changing the space occupied by an image into my layout.

So I have a situation like this: I don't put the image directly into my XML layout file but I do it programatically into my activity code calling this method:

ImageView difficultyContainerImageView1 = (ImageView) rootView.findViewById(R.id.difficultyContainer);

difficultyContainerImageView1.setImageDrawable(new BitmapDrawable(getResources(), ImgUtility.createRankingImg(context, 3)));

So the ImgUtility.createRankingImg(context, 3) return a Bitmap object that is setted into the ImgeView of my layout having difficultyContainer as ID.

It works fine and the image is showed into my layout, this one:

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="fill_parent"
    android:layout_height="250dp"
    android:scaleType="fitXY" />

<TextView
    android:id="@android:id/text1"
    style="@style/pastaTitleTextStyle" />

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <LinearLayout
        android:layout_width="0px"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical">

        <TextView
            style="@style/HeaderTextStyle"
            android:text="Difficoltà:" />


        <ImageView
            android:id="@+id/difficultyContainer"
            android:layout_width="fill_parent"
            android:layout_height="55dp"
            android:scaleType="fitXY" />

    </LinearLayout>

</LinearLayout>

The image is correctly showed into this ImageView:

<ImageView
    android:id="@+id/difficultyContainer"
    android:layout_width="fill_parent"
    android:layout_height="55dp"
    android:scaleType="fitXY" />

The only problem is that doing in this way the image horizontally occupy all the space of the view, this is what I obtained (the image is the last one that contains the chef hats):

It should depends by the fact that I am using android:layout_width="fill_parent" to say that the ImageView having id=difficultyContainer have to horizontally occupy all the spac of its container (the main LinearLayout).

So I want know how can I set a percentual width\height for this ImageView.

What is the best way to specify a percentage so my image will be shown smaller in my app? What is the best solution to do it?

what I get is you want to set width of image view manually (by programmatic way) ? — dex, Sep 04 '16 at 14:39
I think you should be able to search for "percent layout android"... http://stackoverflow.com/a/32168421/2308683 — OneCricketeer, Sep 04 '16 at 14:42

score 1 · Accepted Answer · answered Sep 04 '16 at 14:52

1

Are you trying to ask how to set the size of the imageView programmatically?

If so use:

ImageView imageView = findViewById(R.id.difficultyContainer);
imageView.getLayoutParams().width = 120;

The same for height, just replace width with height.

This value of '120' being in dp, which means the size of the image will adjust depending on the screen size of the output device, meaning you don't need to utilise percentages like you would in html/css

answered Sep 04 '16 at 14:52

enem95

34
4

ok, interesting, so if I set the width in my XML view definition using the DP it is related to the specific used display and I can avoid to specifu a percentage? – AndreaNobili Sep 04 '16 at 14:54
1

yes exactly :) 1 dp = the size of one physical pixel on the device screen, so these sizes will differ from device to device find more information here in the 'Density Independence' section: https://developer.android.com/guide/practices/screens_support.html – enem95 Sep 04 '16 at 17:13

score 0 · Answer 2 · answered Sep 04 '16 at 15:00

0

Just add padding to your ImageView

<ImageView
        android:id="@+id/difficultyContainer"
        android:layout_width="fill_parent"
        android:layout_height="55dp"
        android:padding="8dp"
        android:scaleType="fitXY" />

answered Sep 04 '16 at 15:00

Dmytro Rostopira

10,588
4
64
86

How can I specify that this ImageView have to be shown smaller?

2 Answers2