Develop Reference

Formatting Dynamic Edittext Android

ANDROID
I have a layout defined in xml and have a static textview, edittext and checkboxes which are all formatted as below:
android:layout_width="0px"
android:layout_height="wrap_content"
android:layout_weight="2"
android:singleLine="true"
android:textSize="14dp"
android:width="180dp"
I add textview, edittext and checkbox dynamically. I need the new added ones to have the same visual display as the ones already present(static ones) on the layout! Could someone guide or point me how to go about it?

You can add the layout by inflating each time you need textview, edittext and chekbox.This way your layout will have same look.Because you are reusing your static layout in xml.
See Layout Inflating for details
You have a layout with textview,edittext and checkbox.Now you will use the layout as a view.Like you said for each row you have to inflate the layout and add it to the row.So for every row you will have the copy of the layout.
TableLayout layout=(TableLayout)findViewById(R.id.tblLayout);
Now you can add the view after inflating the layout
View rowView = inflater.inflate(R.layout.row_layout, null, true);
TableRow tblrow=new TableRow(this);
tblRow.add(rowView);
layout.add(tblRow);

You can create any control Dynamic like this way.
Here i show for Edit Text same way you can do for others.
EditText et = new EditText(this);
et.setText("");
et.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));

Use the following code for dynamic configurations about EditText.
EditText my_edit = (EditText) findViewById(R.id.my_edit);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.weight = 2.0f;
my_edit.setLayoutParams(params);
my_edit.setTextSize(20);
my_edit.setWidth(180);
my_edit.setSingleLine(true);
For this you must need LinearLayout as a parent of your EditText.
I hope this helps you somehow.
Thanks.

Why my edit text is not taking gravity...?

I am adding one edit text pro-grammatically, in that i am setting the gravity but its not reflecting.
code:
EditText bcc = new EditText(getApplicationContext());
LayoutParams para = new LayoutParams(LayoutParams.FILL_PARENT, 45);
//bcc.setBackgroundColor(Color.parseColor("#00000000"));
bcc.setTextColor(Color.parseColor("#000000"));
bcc.setSingleLine(true);
para.setMargins(0, 0, 0, 5); // left, top, right, bottom.
bcc.setTextSize(15);
bcc.setGravity(Gravity.BOTTOM);
bcc.setInputType(InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS);
bcc.setId(100);
bcc.setLayoutParams(para);

This gravity bcc.setGravity(Gravity.BOTTOM); marks only how text should lay inside EditText.
If parent of EditText is RelativeLayout you can provide rules inside RelativeLayout.LayoutParams.

set gravity of parent of the view. If view parent is layout then the code will be like the following
((LinearLayout) bcc.getParent()).setGravity(Gravity.CENTER_VERTICAL);

Eventually you would be adding this EditText bcc to a view group? Depending on what type of ViewGroup the parent is, you would need to do the following:
LinearLayout:
via XML:
You have to set android:layout_gravity="center_vertical".
via code:
LinearLayout.LayoutParams lp = viewGroup.getLayoutParams();
lp.gravity = Gravity.CENTER_VERTICAL;
viewGroup.setLayoutParams(lp);
The code will be different for different parent layout types.

When you creating EditText programmatically, you must at first set setKeyListener(TextKeyListener.getInstance());
Otherwise your view will always be aligned with Gravity.TOP.
I don't know real reason, but before you specifiy any other parameter to EditText, you must set setKeyListener(TextKeyListener.getInstance());
Correction : It only work if you create you custom widget by extending EditText and defining your widget in XML. Only tested on Android 5.0.1

Added Views appear at top of screen

I've been trying to add multiple textviews and buttons when onClick, and this is the best code I have found that actually works:
RelativeLayout relative = (RelativeLayout) findViewById(R.id.RelativeLayout01);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
(LayoutParams.WRAP_CONTENT), (LayoutParams.WRAP_CONTENT));
TextView tv = new TextView(getApplicationContext());
tv.setLayoutParams(lp);
tv.setText("Shift" + mShiftCount);
EditText edittv = new EditText(getApplicationContext());
edittv.setLayoutParams(lp);
relative.addView(tv);
relative.addView(edittv);
This seems to be the best code to add additional items that are alike to that of what I already have in my main.XML file.
My issue is that when these are added, they appear at the top of the screen and I am unsure how to add further parameters to the objects.
How would I go about placing the textview and edittext below my other elements specified in the XML?

What you need to do is create a RelativeLayout.LayoutParams (refer here) when you add the views like tv and edittv to the RelativeLayout. In your RelativeLayout.LayoutParams, you need to define the same parameters you would give to your other RelativeLayout objects. Here is an example:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.BELOW, R.id.idOfWhatYouWantToBeBelowOf);
addView(tv, params);

First off there are definitely some static components to your view and some dynamic components. can you please specify what is your layout file so that i can give you a much more detail in your application.

How to set the android property layout_alignParentBottom to a button dynamically

I have a dynamic layout and I have a button. How can I set the property layout_alignParentBottom to that button so that it would appear in the bottom of my relative layout?
Or do you know another way?

This will only work if your layout is a RelativeLayout, as other ViewGroups don't understand alignParentBottom.
RelativeLayout layout = findViewById(R.id.my_relative_layout);
Button button = new Button(this); // your button
lp = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); // You might want to tweak these to WRAP_CONTENT
lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
layout.addView(button, lp);

Setting attributes of an EditText added dynamically in Android

I am developping an android app which downloads an xml and displays a layout with a number of edittexts, checkboxes, spinners, etc. added dynamically like this:
LinearLayout ll = new LinearLayout(this);
EditText nameField = new EditText(this);
ll.addView(nameField);
ScrollView sv = new ScrollView(this);
sv.addView(ll);
setContentView(sv);
I'm having trouble with setting some properties to an EditText added this way. For examle android:maxLength attribute can easily be set in an xml layout but I found no method to do the same in the java code.
How can I do it when hawing to add dynamically?
Thanks,
Zoltán from Hungary

If you look at the XML attributes in the docs, it lists the corresponding method you can call in your java code for each attribute
So for example setting the maxLength attribute can be accomplished through the setFilters(InputFilter) method.