如何以编程方式设置ImageView
的宽度和高度?
It may be too late but for the sake of others who have the same problem, to set the height of the ImageView
:
imageView.getLayoutParams().height = 20;
Important. If you're setting the height after the layout has already been 'laid out', make sure you also call:
imageView.requestLayout();
If your image view is dynamic, the answer containing getLayout will fail with null-exception.
In that case the correct way is:
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(100, 100);
iv.setLayoutParams(layoutParams);
This simple way to do your task:
setContentView(R.id.main);
ImageView iv = (ImageView) findViewById(R.id.left);
int width = 60;
int height = 60;
LinearLayout.LayoutParams parms = new LinearLayout.LayoutParams(width,height);
iv.setLayoutParams(parms);
and another way if you want to give screen size in height and width then use below code :
setContentView(R.id.main);
Display display = getWindowManager().getDefaultDisplay();
ImageView iv = (LinearLayout) findViewById(R.id.left);
int width = display.getWidth(); // ((display.getWidth()*20)/100)
int height = display.getHeight();// ((display.getHeight()*30)/100)
LinearLayout.LayoutParams parms = new LinearLayout.LayoutParams(width,height);
iv.setLayoutParams(parms);
hope use full to you.
I have played this one with pixel
and dp
.
private int dimensionInPixel = 200;
How to set by pixel :
view.getLayoutParams().height = dimensionInPixel;
view.getLayoutParams().width = dimensionInPixel;
view.requestLayout();
How to set by dp :
int dimensionInDp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dimensionInPixel, getResources().getDisplayMetrics());
view.getLayoutParams().height = dimensionInDp;
view.getLayoutParams().width = dimensionInDp;
view.requestLayout();
Hope this would help you.
If you need to set your width or height to match_parent
(as big as its parent) or wrap_content
(large enough to fit its own internal content), then ViewGroup.LayoutParams
has this two constants:
imageView.setLayoutParams(
new ViewGroup.LayoutParams(
// or ViewGroup.LayoutParams.WRAP_CONTENT
ViewGroup.LayoutParams.MATCH_PARENT,
// or ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.MATCH_PARENT ) );
Or you can set them like in Hakem Zaied's answer :
imageView.getLayoutParams().width = ViewGroup.LayoutParams.MATCH_PARENT;
//...
You can set value for all case.
demoImage.getLayoutParams().height = 150;
demoImage.getLayoutParams().width = 150;
demoImage.setScaleType(ImageView.ScaleType.FIT_XY);
The best and easiest way to set a button dynamically is
Button index=new Button(this);
int height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 45, getResources().getDisplayMetrics());
int width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 42, getResources().getDisplayMetrics());
The above height and width are in pixels px . 45 being the height in dp and 42 being the width in dp .
index.setLayoutParams(new <Parent>.LayoutParams(width, height));
So, for example, if you've placed your button within a TableRow within a TableLayout, you should have it as TableRow.LayoutParams
index.setLayoutParams(new TableRow.LayoutParams(width, height));
Simply create a LayoutParams object and assign it to your imageView
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(150, 150);
imageView.setLayoutParams(params);
image_view.getLayoutParams().height
returns height value in pixels. You need to get the screen dimensions first to set the values properly.
Display display = context.getWindowManager().getDefaultDisplay();
DisplayMetrics outMetrics = new DisplayMetrics();
display.getMetrics(outMetrics);
int screen_height = outMetrics.heightPixels;
int screen_width = outMetrics.widthPixels;
After you get the screen dimensions, you can set the imageview width&height using proper margins.
view.getLayoutParams().height = screen_height - 140;
view.getLayoutParams().width = screen_width - 130 ;
In order to set the ImageView and Height Programatically, you can do
//Makesure you calculate the density pixel and multiply it with the size of width/height
float dpCalculation = getResources().getDisplayMetrics().density;
your_imageview.getLayoutParams().width = (int) (150 * dpCalculation);
//Set ScaleType according to your choice...
your_imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);
kotlin
val density = Resources.getSystem().displayMetrics.density
view.layoutParams.height = 20 * density.toInt()
image.setLayoutParams(new ViewGroup.LayoutParams(width, height));
example:
image.setLayoutParams(new ViewGroup.LayoutParams(150, 150));
In the scenario where the widget size needs to be set programmatically, ensure the below rules.
LayoutParam
for the Layout in which you are adding that view . In my case I am adding to TableRow
so I had to do TableRow.LayoutParams
final float scale = getResources().getDisplayMetrics().density; int dpWidthInPx = (int) (17 * scale); int dpHeightInPx = (int) (17 * scale);
TableRow.LayoutParams deletelayoutParams = new TableRow.LayoutParams(dpWidthInPx, dpHeightInPx); button.setLayoutParams(deletelayoutParams); tableRow.addView(button, 1);
If you want to just fit the image in image view you can use" wrap content" in height and width property with scale-type but if you want to set manually you have to use LayoutParams.
Layoutparams is efficient for setting the layout height and width programmatically.
int newHeight = 150;
int newWidth = 150;
holder.iv_arrow.requestLayout();
holder.iv_arrow.getLayoutParams().height = newHeight;
holder.iv_arrow.getLayoutParams().width = newWidth;
holder.iv_arrow.setScaleType(ImageView.ScaleType.FIT_XY);
holder.iv_arrow.setImageResource(R.drawable.video_menu);
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