layout parameters

Adding TextView in Android

Objectives :

  • How to set TextView in Android?
  • How to add TextView in Android?
  • How to add TextView in Android via Java program?
  • How to set Layout parameters from Java code in Android?

TextView is a one of the Views available in Android. There are two (2) ways to add TextView in your Android application as follows :

  1. Using XML code
  2. Using Java code

XML Code example – Adding to a TextView in a layout xml file

[sourcecode language=”xml”]
<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World" />

</LinearLayout>
[/sourcecode]

 

Java Code example – Creating and adding a new TextView to a Layout

[sourcecode language=”java”]
// Creates object of TextView
TextView textView = new TextView(this);
// Set text to display in TextView on Screen
textView.setText(“Hello World”);
// Add TextView to Linear Layout with layout parameters
((LinearLayout)findViewById(R.id.mainLayout))
.addView(textView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
[/sourcecode]

Above Java code can be written in onCreate() of your Activity.

Here LayoutParams.FILL_PARENT will set layout height to FILL_PARENT, LayoutParams.WRAP_CONTENT will set layout width to WRAP_CONTENT.

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