Develop Reference

how to display a layout dynamically with margin

I have two layouts, i inflate one layout into another and want to display this inflated layout including textview as many times as condition is true . I set the textview value as value of i and also set the layout top margin. but it displaying value of i in one row only and rest are blank,also its setMargin() also not working.Below is what i have done yet.
public void displayRows(){
int n= 6;
for(int i=0;i< n;i++){
LinearLayout container = (LinearLayout)findViewById(R.id.layoutContainer);
View hiddenInfo = getLayoutInflater().inflate(R.layout.dynamic, container, false);
container.addView(hiddenInfo);
LinearLayout hiddenLayout = (LinearLayout)findViewById(R.id.dynamic);
TextView textView = (TextView) findViewById(R.id.text);
textView.setText("Text"+i);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(0, 30, 0, 0);
hiddenLayout.setLayoutParams(layoutParams);
hiddenLayout.addView(textView);
}
container.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="#+id/layoutContainer"
android:animateLayoutChanges="true"
android:layout_gravity="center|top"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/li1"
android:layout_gravity="center"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:background="#color/colorAccent"
android:onClick="displayRows"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:textColor="#color/colorPrimary"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:layout_gravity="center"
android:text="Rows"/>
</LinearLayout>
</LinearLayout>
dynamic.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/dynamic"
android:background="#color/colorAccent"
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text"
android:text=""
android:textColor="#color/colorPrimary"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
I also want to know how to remove all the generated dynamic rows on click remove button.

Replace
LinearLayout hiddenLayout = (LinearLayout)findViewById(R.id.dynamic);
TextView textView = (TextView) findViewById(R.id.text);
with
LinearLayout hiddenLayout = (LinearLayout) hiddenInfo.findViewById(R.id.dynamic);
TextView textView = (TextView) hiddenInfo.findViewById(R.id.text);
And remove this line
hiddenLayout.addView(textView);

Inflating View into LinearLayout and editing cmponents in this view

I am trying to add multiple LinearLayouts into one declared in xml. Everyone has 3 textView which will be edited in code. My problem is, when i am inflating xml layout to View object in code, all margins are ignored. My second question:
How can i dynamically set ids to textViews and then edit text in it?
LinearLayout xml which is inflating:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/pointsAwaiting"
android:layout_marginTop="40dp"
android:background="#drawable/background_blue"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical"
android:padding="10dp">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:textColor="#FFFFFF"
android:textSize="20dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="2"
android:textColor="#FFFFFF"
android:textSize="15dp" />
</LinearLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="2"
android:padding="10dp"
android:textColor="#FFFFFF"
android:textSize="20dp" />
</LinearLayout>
He is inflating into this piece of code:
<
ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/background"
tools:context="pl.com.qiteq.zielonomocni_rework.HistoryActivity">
<LinearLayout
android:id="#+id/mainView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">
<LinearLayout
android:id="#+id/historyView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</LinearLayout>
</ScrollView>
And finnaly java code: (loop counter is for example)
LinearLayout mainView = (LinearLayout) findViewById(R.id.historyView);
for (int i=0; i<=2; i++){
View layout = View.inflate(this, R.layout.history_bar, null);
mainView.addView(layout);
}

The reason all your margins are being ignored is that you are passing null into your inflater here:
View layout = View.inflate(this, R.layout.history_bar, null);
When you do this all the LayoutParams of your view are thrown away. You should replace it with:
View layout = inflater.inflate(this, R.layout.history_bar, mainView, false);
To set text in the TextViews you don't need to set a different id for each one, just give each one an id. Then in your loop you can do something like:
List<TextView> textViews = new ArrayList<>();
LayoutInflater inflater = LayoutInflater.from(this);
for (int i=0; i<=2; i++){
View layout = inflater.inflate(this, R.layout.history_bar, mainView, false);
mainView.addView(layout);
TextView textView = (TextView) layout.findViewById(R.id.text1);
textViews.add(textView);
}
You would then have a reference to each of your TextViews in the List

How to programmatically (dynamically) center a LinearLayout inside a RelativeLayout?

I want to dynamically center a LinearLayout view inside its RelativeLayout parent and so I want to use android.R.attr.layout_centerInParent.
How do I apply it?
I tried the following but the child view does not appear at all.
child view
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView android:id="#+id/text1"
android:textSize="16sp"
android:textStyle="bold"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView android:id="#+id/text2"
android:textSize="16sp"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
parent view
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/parent_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center">
<FrameLayout
android:id="#+id/my_preview"
android:layout_width="match_parent"
android:layout_height="407dp" >
</FrameLayout>
<include
android:id="#+id/my_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="0dp"
android:layout_marginTop="408dp"
layout="#layout/my_bar" />
</RelativeLayout>
in my activity
LayoutInflater inflater = (LayoutInflater) this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
RelativeLayout rootView = (RelativeLayout) inflater.inflate(id, null);
LinearLayout textBox = (LinearLayout) inflater.inflate(R.layout.child_view, null);
TextView line2 = (TextView) textBox.findViewById(R.id.text2);
line2.setText("hahahaha");
TextView line1 = (TextView) textBox.findViewById(R.id.text1);
line1.setText("rrrrrrrrrr");
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
rlp.addRule(android.R.attr.layout_centerInParent);
textBox.setLayoutParams(rlp);
rootView.addView(textBox);
setContentView(rootView);
I changed the child view to a RelativeLayout but still cannot see the child view.

For some reason, android.R.attr.layout_centerInParent fails.
I used
rlp.addRule(RelativeLayout.CENTER_IN_PARENT);
and it worked!

Dynamic layout inflator within a loop

I want to display x number of an xml layout within an activity based upon a loop of data from a parcelable array. For this example, I've changed the array size to a fixed value of 3.
The xml of the layout I am wanting to inflate is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<RadioGroup android:id="#+id/rg_type"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<RadioButton
android:id="#+id/radioButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Yes"
android:tag="1" />
<RadioButton
android:id="#+id/radioButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="No"
android:tag="0" />
<RadioButton
android:id="#+id/radioButton3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Don't Know"
android:tag="3" />
</RadioGroup>
</LinearLayout>
The xml of the parent page is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/ll_content"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</LinearLayout>
</LinearLayout>
This is the code for the Activity:
public class PainRecord_FollowUp extends Activity {
LinearLayout llContent;
Context context;
PainDataItem pd_in; //this is the Parcelable extra received
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.painrecord_followup);
Bundle extras = getIntent().getExtras();
if (extras != null) {
pd_in = extras.getParcelable("m_PainDataItem");
}
LayoutInflater layoutInflator = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout insertPoint = (LinearLayout) findViewById(R.id.ll_content);
List views = new ArrayList();
for(int i=0; i<3; i++){
View view = layoutInflator.inflate(R.layout.row_painrecord_followup, null);
TextView textView = (TextView) view.findViewById(R.id.tv_title);
textView.setText("did x help " + i);
view.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
views.add(view);
}
for(int i = 0; i<views.size(); i++)
insertPoint.addView((View) views.get(i));
}
}
Instead of showing each layout underneath each other, it displays it like this:
If I change to LayoutParams.FILL_PARENT, then just the [0] loop value shows.
Any advice greatly received.
Thanks

Set your LinearLayout orientation to vertical
<LinearLayout
android:id="#+id/ll_content"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>

How to have a ListView with icons beside the text?

I'm trying to have a ListView with icon and text but there is a little problem as you can see in the screen shot (only a very small part of text is visible!):
Here is the xml files creating this layout:
//The overall layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="#+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android" >
<ListView
android:id="#+id/ListView01"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</LinearLayout>
// this layout is for single rows
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/lIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/lText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
Edit: This is the getView method of my custom adapter.
public View getView(int position, View convertView, ViewGroup parent) {
View myView = convertView;
cu.moveToPosition(position);
if (convertView == null) {
LayoutInflater li = getLayoutInflater();
myView = li.inflate(R.layout.listicon, null);
ImageView imageView = (ImageView) myView.findViewById(R.id.lIcon);
myView.setLayoutParams(new GridView.LayoutParams(60, 90));
myView.setPadding(8, 8, 8, 8);
byte[] b = Base64.decode(cu.getString(2),Base64.DEFAULT);
imageView.setImageBitmap(BitmapFactory.decodeByteArray(b, 0, b.length));
TextView textView = (TextView) myView.findViewById(R.id.lText);
textView.setText(cu.getString(1));
}
//cu.moveToNext();
int catID = cu.getInt(0);
myView.setTag((Object) catID);
return myView;
}

Try setting layout_width of the ListView and TextView to fill_parent
EDIT: you're resetting list item width in the getView. Either remove or correct your code

Use a relative layout for your rows and place the text right of the image as below :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/lIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/lText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/lIcon"/>
</RelativeLayout>

This is related to the way single row is inflated in the adapter
You should try using
LayoutInflater#inflate(layoutId, parent, false)
as suggested in this answer:
https://stackoverflow.com/a/1662611

Try this layout for the row layout:
Adjust the IDs to yours.. also notice the android:layout_toRightOf id.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<ImageView
android:id="#+id/bimage"
android:layout_height="20dip"
android:layout_width="20dip"
android:layout_gravity="left|center"
android:layout_marginTop="10dip"
android:layout_marginLeft="5dip"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
/>
<TextView
android:id="#+id/btitle"
android:layout_toRightOf="#id/bimage"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginTop="8dip"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:textSize="18dip"
android:textColor="#ffffff"
android:gravity="center_vertical"
/>
</RelativeLayout>