Connecting xml to programmatic layout in Android

Question

I have a custom layout java file that I create and add views to like this:

 PredicateLayout layout = new PredicateLayout(this);

    for (int i = 0; i < someNumberThatChangesEveryTime; i++) 
    {            
        TextView t = new TextView(this);
        t.setText("Hello");
        t.setBackgroundColor(Color.RED);
        t.setSingleLine(true);
       layout.addView(t, new PredicateLayout.LayoutParams(2, 0));
    }
 setContentView(layout);

What I would like to do is define my TextView in an xml, so I can add it like so:

TextView t = (TextView) findViewById(R.id.textview);

And of couse also add other kinds of views. I have no idea how to write this xml file, or how to connect it to this activity. The layout I'm using is this one: Line-breaking widget layout for Android

Answer 1

Find the id of the root layout in xml and add other ui elements programatically to the root layout.

activity_main.xml

<RelativeLayout 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:orientation="vertical"
andorid:id="@+id/ll
tools:context=".MainActivity" >

<TextView
    android:id="@+id/tv"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginTop="20dp"
    android:text="Blank text" />
 </RelativeLayout>

Your MainActivity

 public class MainActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
           RelativeLayout ll = (RelativeLayout) findViewById(R.id.ll);
            TextView tv= (TextView) findViewById(R.id.tv);
            // add other ui elements to the root layout ie Relative layout  


     }
    }