may I know how to set margin in imageview dynamically?
You're probably looking for something like this: http://developer.android.com/reference/android/view/View.html#setLayoutParams(android.view.ViewGroup.LayoutParams)
Note this part of the method description though:
These supply parameters to the parent of this view specifying how it
should be arranged
Which means that if you have an ImageView inside of a LinearLayout, you need to supply the method with LinearLayout.LayoutParams, like this:
ImageView image = new ImageView(this);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(100, 100);
params.setMargins(1, 1, 1, 1);
image.setLayoutParams(params);
And then you just call setMargins or set the specific leftMargin, bottomMargin etc. properties of the LayoutParams.
Related
I'm creating the above popup, the content of which consists of rows of horizontal LinearLayout views within a main vertical LinearLayout. Each horizontal LinearLayout contains one ImageView and one TextView.
I'm creating this within a PopupWindow, and doing so programmatically so that I can change the ImageView source as required.
As you can see the first icon seems to take up a lot of space, despite having the same code generating it as the other icons.
Below is the code:
LinearLayout verticalLayout = new LinearLayout(context);
verticalLayout.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams mainLayoutParams =
new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
verticalLayout.setLayoutParams(mainLayoutParams);
LinearLayout.LayoutParams layoutParams =
new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
LinearLayout.LayoutParams iconParams =
new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT);
LinearLayout.LayoutParams textParams =
new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
//History row
LinearLayout historyLayout = new LinearLayout(context);
historyLayout.setLayoutParams(layoutParams);
historyLayout.setOrientation(LinearLayout.HORIZONTAL);
ImageView historyIcon = new ImageView(context);
historyIcon.setImageResource(R.drawable.small_book_grey);
historyIcon.setAdjustViewBounds(true);
historyIcon.setLayoutParams(iconParams);
historyLayout.addView(historyIcon);
TextView historyText = new TextView(context);
historyText.setLayoutParams(textParams);
historyText.setText("History");
historyLayout.addView(historyText);
verticalLayout.addView(historyLayout);
//Exam row...
//... (duplicate of history row)
I've tried playing around with the layout parameters, even creating a mock xml layout that displays the content as I'd like, to match the parameters to.
If anyone can give some advice on making that book icon the same size as the others, I'd be grateful.
Add a scaleType to ImageView of fitCenter
Write this code under historyIcon.setAdjustViewBounds(true);
historyIcon.setWidth()`
And put width according to your layout.
Although I didn't figure out why the first image was scaling differently to the other images, I did find another solution: Using compound left drawables.
historyText.getViewTreeObserver()
.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
Drawable img = m_context.getResources().getDrawable(
R.drawable.small_book_grey);
img.setBounds(0, 0, img.getIntrinsicWidth() * historyText.getMeasuredHeight() / img.getIntrinsicHeight(), historyText.getMeasuredHeight());
historyText.setCompoundDrawables(img, null, null, null);
historyText.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
});
Manually setting the bounds to match the TextView worked. Seems clunky, but it was the only way I could get it to do what I was aiming for.
I have a method that creates several buttons
public Button[] generaBottoniRisposta(int numeroBottoni, Context context){
Button bottoni[]= new Button[numeroBottoni];
/*genero un tot di bottoni in base a numeroBottoni, รจ necessario avere il context*/
for(int i=0; i < bottoni.length;i++){
bottoni[i] = new Button(context);
bottoni[i].setId(i);
bottoni[i].setText(String.valueOf(i+1));
LayoutParams param = new LinearLayout.LayoutParams(50, 50);
bottoni[i].setLayoutParams(param);
}
return bottoni;
}
and then another method that add them to a gridlayout.
I want to set the width of those buttons, but i'm not able to do it.
I tried a lot of stuff, setWidth(), setMaxWidth(), invalidate() etc.
Something weird happens. If I try to make the button bigger than its default size it works, if i try to make the button smaller than its default size it doesn't work!
How should I do? thank you
Try using LayoutParams, something like..
RelativeLayout.LayoutParams rel_bottone = new RelativeLayout.LayoutParams(buttonWidth, buttonHeight);
button.setLayoutParams(rel_bottone);
And the layout depends on the parent layout that contains the buttons..
I think setlayoutparams should do what you want. Like in the answer in this thread.
Set View Width Programmatically
try this:
LinearLayout.LayoutParams params = button.getLayoutParams();
params.width = 100;
button.setLayoutParams(params);
one more thing LinearLayout.LayoutParams is used when parent is a LinearLayout and when parent is RelativeLayout use RelativeLayout.LayoutParams.
Try something like this :
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, height);
button.setLayoutParams(params);
My buttons are inside a gridlayout. I tried to use GridLayout.LayoutParams giving the width of the cells, instead of trying to set the width of the button, and now it seems to work.
this is the code I use to add the buttons to the GridLayout
Spec row = GridLayout.spec(numeroRiga, 1);
Spec colspan = GridLayout.spec(numeroColonna, 1);
GridLayout.LayoutParams gridLayoutParam = new GridLayout.LayoutParams(row,colspan);
gridLayoutParam.width=50;
gridLayoutParam.height=50;
gridLayout.addView(button,gridLayoutParam);
But i'm wondering if i can set the width of the buttons in a similar way.
Need to set left margin to a button object programatically.
This is the code segment:
RelativeLayout rl = (RelativeLayout) findViewById(R.id.for_button);
MarginLayoutParams ml = new MarginLayoutParams(-2,-2);
ml.setMargins(5, 0, 0, 0);
Button btn = new Button(this);
btn.setText("7");
btn.setTextColor(Color.WHITE);
btn.setBackgroundResource(R.drawable.date_button);
rl.addView(btn,ml)
I also tried
btn.setLayoutParams(ml);
rl.addView(btn);
Whats the big problem. Or is there any alternative way?
Alright, I'm gonna give this a shot IronBlossom; this is how I do it and I hope it works:
LinearLayout myLinearLayout = (LinearLayout)findViewById(R.id.my_linear_layout);
Button myButton = new Button(this);
// more myButton attribute setting here like text etc //
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
params.setMargins(5,0,0,0);
myLinearLayout.addView(myButton, params);
best,
-serkan
You use a RelativeLayout as the parent for the button, but you don't specify any rules for the it where to place the button (e.g. ALIGN_PARENT_LEFT and ALIGN_PARENT_TOP).
You have to set rules for position when using a RelativeLayout though, so this messes with the layout calculation. This means that you have to use RelativeLayout.LayoutParams instead of the MarginLayoutParams because the former allows these rules and has proper default values set.
Alter this line:
MarginLayoutParams ml = new MarginLayoutParams(-2,-2);
to
RelativeLayout.LayoutParams ml = new RelativeLayout.LayoutParams(-2,-2);
Chances are that you also want to add rules because the default positioning values don't suit you (views get positioned in the top left corner of the parent layout by default). You can use RelativeLayout.LayoutParams.addRule() for that.
Can anyone help me how to set the width of TextView to wrap_content through code and not from XML?
I am dynamically creating a TextView in code ,so is there anyway to how to set its width to wrap_content through code?
TextView pf = new TextView(context);
pf.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
For different layouts like ConstraintLayout and others, they have their own LayoutParams, like so:
pf.setLayoutParams(new ConstraintLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
or
parentView.addView(pf, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
There is another way to achieve same result. In case you need to set only one parameter, for example 'height':
TextView textView = (TextView)findViewById(R.id.text_view);
ViewGroup.LayoutParams params = textView.getLayoutParams();
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
textView.setLayoutParams(params);
Solution for change TextView width to wrap content.
textView.getLayoutParams().width = ViewGroup.LayoutParams.WRAP_CONTENT;
textView.requestLayout();
// Call requestLayout() for redraw your TextView when your TextView is already drawn (laid out) (eg: you update TextView width when click a Button).
// If your TextView is drawing you may not need requestLayout() (eg: you change TextView width inside onCreate()). However if you call it, it still working well => for easy: always use requestLayout()
// Another useful example
// textView.getLayoutParams().width = 200; // For change `TextView` width to 200 pixel
A little update on this post: if you are using ktx within your Android project, there is a little helper method that makes updating LayoutParams a lot easier.
If you want to update e.g. only the width you can do that with the following line in Kotlin.
tv.updateLayoutParams { width = WRAP_CONTENT }
I am posting android Java base multi line edittext.
EditText editText = findViewById(R.id.editText);/* edittext access */
ViewGroup.LayoutParams params = editText.getLayoutParams();
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
editText.setLayoutParams(params); /* Gives as much height for multi line*/
editText.setSingleLine(false); /* Makes it Multi line */
I think this code answer your question
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)
holder.desc1.getLayoutParams();
params.height = RelativeLayout.LayoutParams.WRAP_CONTENT;
holder.desc1.setLayoutParams(params);
I want to set the LayoutParams for an ImageView but cant seem to find out the proper way to do it.
I can only find documentation in the API for the various ViewGroups, but not an ImageView. Yet the ImageView seems to have this functionality.
This code doesn't work...
myImageView.setLayoutParams(new ImageView.LayoutParams(30,30));
How do I do it?
You need to set the LayoutParams of the ViewGroup the ImageView is sitting in. For example if your ImageView is inside a LinearLayout, then you create a
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(30, 30);
yourImageView.setLayoutParams(layoutParams);
This is because it's the parent of the View that needs to know what size to allocate to the View.
Old thread but I had the same problem now. If anyone encounters this he'll probably find this answer:
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(30, 30);
yourImageView.setLayoutParams(layoutParams);
This will work only if you add the ImageView as a subView to a LinearLayout. If you add it to a RelativeLayout you will need to call:
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(30, 30);
yourImageView.setLayoutParams(layoutParams);
If you're changing the layout of an existing ImageView, you should be able to simply get the current LayoutParams, change the width/height, and set it back:
android.view.ViewGroup.LayoutParams layoutParams = myImageView.getLayoutParams();
layoutParams.width = 30;
layoutParams.height = 30;
myImageView.setLayoutParams(layoutParams);
I don't know if that's your goal, but if it is, this is probably the easiest solution.
An ImageView gets setLayoutParams from View which uses ViewGroup.LayoutParams. If you use that, it will crash in most cases so you should use getLayoutParams() which is in View.class. This will inherit the parent View of the ImageView and will work always. You can confirm this here: ImageView extends view
Assuming you have an ImageView defined as 'image_view' and the width/height int defined as 'thumb_size'
The best way to do this:
ViewGroup.LayoutParams iv_params_b = image_view.getLayoutParams();
iv_params_b.height = thumb_size;
iv_params_b.width = thumb_size;
image_view.setLayoutParams(iv_params_b);
In order not to lose the rest of the parameters, you need to do as shown below:
Drawable drawable = ResourcesCompat.getDrawable(getResources(), R.drawable.checked, null);
preview.setImageDrawable(drawable);
ViewGroup.LayoutParams layoutParams = preview.getLayoutParams();
layoutParams.width = 100;
layoutParams.height = 98;
preview.setLayoutParams(layoutParams);