Android add imageview programmatically fix size all screen

Question

I'm creating several ImageViews programmatically, but I'm running into an issue where there are different ImageView sizes on different displays. I want the ImageView size to be fixed on all screens. Here is how I am generating those ImageViews:

for (int i = 0; i < myImageList.size(); i++) {
    ImageView iv = new ImageView(this);
    iv.setImageResource(myImageList.get(i));
    FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(420, 210);
    lp.gravity = Gravity.CENTER;
    iv.setLayoutParams(lp);
    float angleDeg = i * 360.0f / myImageList.size() - 70.0f;
    float angleRad = (float) (angleDeg * Math.PI / 180.0f);
    iv.setTranslationX(320 * (float) Math.cos(angleRad));
    iv.setTranslationY(320 * (float) Math.sin(angleRad));
    iv.setRotation(angleDeg + 80.0f);
    main.addView(iv);
    final int finalI = i;
}

score 0 · Answer 1 · answered Jun 19 '19 at 15:11

0

You could introduce new class derived from ImageView and make all those adjustments in that class. Then just replaces ImageView to your class implementation in layouts etc

answered Jun 19 '19 at 15:11

Dmytro Batyuk

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score 0 · Answer 2 · answered Jun 19 '19 at 15:24

There are multiple interpretations of your questions.

The ImageView should have same size on all the devices - use dp. You are using pixels right now in the LayoutParams.
The ImageView should look that it has same size on all screens - find the width and height of the screen, set an aspect ration, eg. 0.33 and use that factored width and height in LayoutParams.
Use MATCH_PARENT in LayoutParams for width as well as height and the ImageView will take the full size (of the parent).

This question has a lot of great explanation about dp, px, sp that could be useful - What is the difference between "px", "dip", "dp" and "sp"?

score 0 · Answer 3 · answered Jun 19 '19 at 15:29

To find screen sizes

    DisplayMetrics metrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(metrics);
    // these are sizes in pixels
    metrics.widthPixels, metric.heightPixels

Then, you can use this

iv.setScaleType(ImageView.ScaleType.FIT_XY);

See this link for all ScaleType values

Android ImageView ScaleType: A Visual Guide

Android add imageview programmatically fix size all screen

3 Answers3