I'm trying to generate a dynamic screen that contains a "textview", "edittext","button" and "listview". I'm trying to add what is written in the edittext to my listview. I'm not getting any errors and i can see added items inside my ArrayList when i debug the code. But listview shows only the very first item added into the list.
LayoutParams layoutMatchParent = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
LayoutParams layoutWrapContent = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
LayoutParams layoutMatchParentWidth = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
ScrollView scrollView = new ScrollView(this);
LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.VERTICAL);
scrollView.addView(linearLayout);
setContentView(scrollView, layoutMatchParent);
LinearLayout vgMul=new LinearLayout(this);
vgMul.setOrientation(LinearLayout.VERTICAL);
TextView tvMul=new TextView(this);
tvMul.setText("Some Label");
tvMul.setId(1);
tvMul.setLayoutParams(layoutWrapContent);
vgMul.addView(tvMul);
EditText edtMul=new EditText(this);
edtMul.setId(2);
edtMul.setLayoutParams(layoutMatchParentWidth);
vgMul.addView(edtMul);
Button btnAddMul=new Button(this);
btnAddMul.setText("Add");
btnAddMul.setLayoutParams(layoutMatchParentWidth);
vgMul.addView(btnAddMul);
ListView lvMul =new ListView(this);
lvMul.setId(3);
lvListItems =new ArrayList<String>();
lvArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, lvListItems);
lvMul.setAdapter(lvArrayAdapter);
lvMul.setScrollContainer(false);
vgMul.addView(lvMul);
btnAddMul.setOnClickListener(new View.OnClickListener() {
#Override public void onClick(View v) {
EditText edtMul=(EditText)findViewById(2);
lvListItems.add(edtMul.getText().toString());
lvArrayAdapter.notifyDataSetChanged();}
});
linearLayout.addView(vgMul);
Is this because of the scrollview? I'm adding my controls as children of a linear layout but i'm stuck...Any help will be appreciated...Thanks...
Remove your scroll view, a listview already implements a scrollview.
Alright, so I assume you have an activity, some part of that activity has a listview, you want to scroll on the listview and also scroll the whole activity.
You can do it by creating the listview in another Relative Layout (or Linear layout). Let me write an example for you in xml
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
//Your text views and other stuff goes here
</RelativeLayout>
</ScrollView>
<RelativeLayout
android:id="#+id/SecondRelativeLayoutDetailedPage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:background="#color/holoActionBarColor">
<ListView
android:id="#+id/myRewardsActiveList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/myActiveRewardsHeadingLinLayout">
</ListView>
</RelativeLayout>
</RelativeLayout>
Does this make more sense now?
Related
I am trying to make buttons wrap in a LinearLayout in Android, but they are just continuing off to the right of the view (the word shown in the screenshot should be "HELLO", so I want the "O" to drop down to the next line).
I am adding the buttons programmatically, but even if I code them into the XML layout file, they still don't wrap. Here is the layout file with the LinearLayout container into which I am dynamically adding the buttons:
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constrainedWidth="true"
tools:context=".LetterTileView">
<LinearLayout
android:id="#+id/TilesContainer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constrainedWidth="true"
android:orientation="horizontal">
</LinearLayout>
And here is the code I am using to create and add the tile buttons:
Context context = this;
LinearLayout layout = (LinearLayout) findViewById(R.id.TilesContainer);
LayoutParams params = new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT );
params.setMargins(50, 50, 0, 0);
for (int i=0;i<wordLength;i++) {
Button tileButton = new Button(this);
tileButton.setLayoutParams(params);
tileButton.setText(wordStringtoLetters[i]);
tileButton.setId(i);
tileButton.setBackgroundResource(R.drawable.tile_button);
tileButton.setTextSize(TypedValue.COMPLEX_UNIT_SP, 36);
layout.addView(tileButton);
}
Any advice would be appreciated. Thanks!
I ended up using FlexboxLayout, which works great for this. Thanks to those who offered suggestions!
First of all, there is no need to use a ConstraintLayout you can use your LinearLayout as the parent layout.
Then for the purpose of displaying all buttons in one line, you have to set weight for the LinearLayout in XML and set weight for the views you add to it.
The xml file should look like:
<LinearLayout
android:id="#+id/TilesContainer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:weightSum="5"
app:layout_constrainedWidth="true"
android:orientation="horizontal">
</LinearLayout>
And in code you should set weight for each view you by adding ,1.0f to LayoutParam :
Context context = this;
LinearLayout layout = (LinearLayout) findViewById(R.id.TilesContainer);
LayoutParams params = new LayoutParams( LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT,1.0f );
params.setMargins(50, 50, 0, 0);
for (int i=0;i<wordLength;i++) {
Button tileButton = new Button(this);
tileButton.setLayoutParams(params);
tileButton.setText(wordStringtoLetters[i]);
tileButton.setId(i);
tileButton.setBackgroundResource(R.drawable.tile_button);
tileButton.setTextSize(TypedValue.COMPLEX_UNIT_SP, 36);
layout.addView(tileButton);
}
I have a linear layout set to vertical where when a button is clicked items are added to it but they are all added vertically.
I would like the fields to be added horizontally each row such that on the next click the new fields are added below the current fields,
setting the layout to horizontal achieves this but on the next click the items are stacked onto each other
This is the xml file
<RelativeLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/toplayout">
<Button <!--..onclick of this fields are added below-->
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/add_household"
android:layout_alignParentRight="true"
android:layout_margin="5dp"
android:id="#+id/add_households_btn" />
</RelativeLayout>
<LinearLayout ..fields are added in this layout
android:orientation="vertical"
android:layout_below="#+id/toplayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/household_items_layout"
android:weightSum="1">
</LinearLayout>
Am adding the fields dynamically and this is the code:
public void add_houses(){ //this is called when the button is clicked
itemslayout.setWeightSum(1);
//sets widget items
Button removeitems = new Button(this);
EditText surname = new EditText(this);
EditText first_name = new EditText(this);
EditText middle_name = new EditText(this);
Spinner gender = new Spinner(this);
EditText dob = new EditText(this);
...other fields here
//set fields properties
surname.setBackgroundResource(android.R.drawable.edit_text);
first_name.setBackgroundResource(android.R.drawable.edit_text);
//set hint for edit texts
surname.setHint("Surname");
first_name.setHint("First name");
...
//set layouts params
LinearLayout.LayoutParams itemsdetails = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, 0.3f
);
itemslayout.addView(surname, itemsdetails);
itemslayout.addView(first_name, itemsdetails);
itemslayout.addView(middle_name, itemsdetails);
itemslayout.addView(dob, itemsdetails);
itemslayout.addView(gender, itemsdetails);
}
The above generates this
How do i stack up the fields horizontally and yet on button click the new fields are set below(vertically)
I am making an alert dialog in an application.Because of more text present in the alert dialog,i want to put vertical scroll bar in the alert dialog.I have tried many options,But nothing is working.Please tell me how to solve this problem.This is the code :
AlertDialog.Builder HelpOnButtonDialog ;
HelpOnButtonDialog = new AlertDialog.Builder(this);
TextView HelpOnButtonView = new TextView(this);
HelpOnButtonView.setSingleLine(false);
HelpOnButtonView.setTextColor(getResources().getColor(R.color.dark_green));
HelpOnButtonView.setText("hello");
Button HelpOnButton = new Button(this);
HelpOnButton.setHeight(20);
HelpOnButton.setWidth(20);
HelpOnButton.setText("Ok");
HelpOnButton.setOnClickListener(HelpOnButtonClickListener);
LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setLayoutParams( new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT));
linearLayout.setOrientation(1);
linearLayout.setBackgroundColor(getResources().getColor(R.color.black));
linearLayout.addView(HelpOnButtonView);
linearLayout.addView(HelpOnButton);
ScrollView sv = new ScrollView(this);
sv.pageScroll(0);
sv.setBackgroundColor(0);
sv.setScrollbarFadingEnabled(true);
sv.setVerticalFadingEdgeEnabled(false);
sv.addView(linearLayout);
alertHelp = HelpOnButtonDialog.create();
alertHelp.setView(sv);
alertHelp.show();
Create a custom dialog you can customize it as you wish. In the dialog box layout xml file
surround your RelativeLayout or LinearLayout with scrollable like below code
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"
android:scrollbarAlwaysDrawVerticalTrack="true"
android:orientation="vertical"
android:layout_weight="1">
<!--Your other text views, buttons... etc surrounded by RelativeLayout
or LinearLayout goes here-->
</ScrollView>
When the content exceeds dlalog box size it will display the scroll bar.
Hope this will help you :)
How do I dynamically add a scrollview in my layout? and once I get that scrollview added I want to add a linearlayout inside it so I can now add controls in that linearlayout?
I hope it will helpful to you.
Try this Code...
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RelativeLayout rl=(RelativeLayout)findViewById(R.id.rl);
ScrollView sv = new ScrollView(this);
sv.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));
LinearLayout ll = new LinearLayout(this);
ll.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
ll.setOrientation(1);
sv.addView(ll);
for(int i = 0; i < 20; i++)
{
Button b = new Button(this);
b.setText("Button "+i);
ll.addView(b);
}
rl.addView(sv);
/* If you want to set entire layout as dynamically, then remove below lines in program :
* setContentView(R.layout.activity_main);
* RelativeLayout rl=(RelativeLayout)findViewById(R.id.rl);
* rl.addView(sv);
*
* And Add below line :
* this.setContentView(sv);
*/
}
try this
http://www.dreamincode.net/forums/topic/130521-android-part-iii-dynamic-layouts/
try this it will work :
TextView tv = new TextView(this);
tv.setText(msg);
tv.setMovementMethod(new ScrollingMovementMethod());
setContentView(tv);
You can wrap your widget inside a ScrollView. Here's a simple example:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/txt"/>
</LinearLayout>
</ScrollView>
If you want to do it in code:
ScrollView sv = new ScrollView(this);
//Add your widget as a child of the ScrollView.
sv.addView(wView);
I have an android xml layout, main.xml. I would like to add controls to this layout at runtime (I would like to add a series of additional linear layouts that contain buttons controls). Can I do that and if yes, how?
Thanks
I see the error u r doing here
LinearLayout mainLayout = (LinearLayout) findViewById(R.layout.main);
You r taking the layout as Linearlayout object, you should take the LinearLayout id
Try this
LinearLayout lnr = (LinearLayout) findViewById(R.id.LinearLayout01);
Button b1 = new Button(this);
b1.setText("Btn");
lnr.addView(b1);
You can add controls programmatically if you want in your code, or even another XML with a View and an Inflater.
Here you can read the basics: http://developer.android.com/guide/topics/ui/declaring-layout.html
Ok, I have got it to work.
The steps are the following:
First inflate the xml layout, ie,
View view = View.inflate(this, R.layout.main, null);
Then instantiate the container object from the xml layout into a ViewGroup class, ie,
ViewGroup container = (ViewGroup) view.findViewById(R.id.myContainer);
Then create a linearLayout object, create and add onto that any controls needed, add the linearLayout to the container object and use setContentView on the view object, ie,
container.addView(buttonsLayout);
this.setContentView(view);
You can do this quite easy by setting an id on the layout on which you want to add views to. Say your main.xml look like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="#+id/label"
android:layout_width="fill_parent"/>
<LinearLayout android:id="#+id/container"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</LinearLayout>
</LinearLayout>
Lets assume that you want to add your additional views to the LinearLayout with id id/container. In your onCreate method you could retrieve that object for later use:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContainer = (ViewGroup)view.findViewById(R.id.container);
}
Now you are all set to add other views to your container ViewGroup:
LinearLayout theButtons = getButtons()
mContainer.addView(theButtons);
In the getButtons method you need to create your LinearLayout containing the buttons you need. Either you do this programmatically or by inflating a view defined in an XML file. See LayoutInflater.inflate.
just try this:
LinearLayout mainLinearLayout = (LinearLayout) findViewById(R.layout.llmain);
now create button dynamically like this
Button btn1 = new Button(this);
btn1.setText=("Button 1");
mainLinearLayout .addView(btn1);
now if you want to add onether linearlayout then add it below button then
LinearLayout llinner = new LinearLayout(this);
Button btn2 = new Button(this);
btn2.setText=("Button 2");
mainLinearLayout .addView(btn2);
llinner.addView(btn2 );
mainLinearLayout .addView(llinner);
Try this :
LinearLayout ll =(LinearLayout)findViewById(R.id.linlay);
Button b = new Button(this);
b.setText("Hello");
l.addView(b);
This might help you
Here is what I did to display a set of runtime buttons on table layout.
MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
View view = View.inflate(this, R.layout.activity_main, null);
TableRow myrow = (TableRow) view.findViewById(R.id.myrow);
Button btn1 = new Button(this);
btn1.setText("Button 1");
myrow .addView(btn1);
Button btn2 = new Button(this);
btn2.setText("Button 2");
myrow .addView(btn2);
this.setContentView(view);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ScrollView
android:id="#+id/myview"
android:layout_width="404dp"
android:layout_height="691dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TableLayout
android:id="#+id/mylayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TableRow android:id="#+id/myrow"></TableRow>
</TableLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
AVD Pixel4API30
Output screenshot