Use Java code to create a view. Use java code to create a view.

Use Java code to create a view. Use java code to create a view.
Use Java code to create view 1. Introduction

Knowledge needed

 

 

Ii. Method

1) create a view using java code
* 1. Create a view object first

View view = View. inflate (this, R. layout. activity01, null );

* 2. Fill in the R. layout. activity01 page in the view.

View view = View. inflate (this, R. layout. activity01, null );
* 3. Add various controls (such as TextView and Button) to the view object. You must convert them to the ViewGroup type before adding them.

Create a TextView Control

(RelativeLayout) view). addView (textView );
* 4. Fill in the view object to the page, that is, fill the value of setContentView into the view object,

SetContentView (view );

2) create a control using TextView as an example.
* 1. Create a TextView object

TextView textView = new TextView (this );
* 2. Set layout parameters for TextView objects

LayoutParams layoutParams = new LayoutParams (LayoutParams. MATCH_PARENT, LayoutParams. WRAP_CONTENT );

TextView. setLayoutParams (layoutParams );
* 3. Set other attributes for the TextView object

TextView. setBackgroundColor (Color. CYAN );
TextView. setText ("hello, stranger !!! ");

 

Iii. code example

 

Code

Fry. Activity01

1 package fry; 2 3 4 import com. fry. javaCreateView. r; 5 6 import android. app. activity; 7 import android. graphics. color; 8 import android. OS. bundle; 9 import android. view. view; 10 import android. view. viewGroup. layoutParams; 11 import android. widget. relativeLayout; 12 import android. widget. textView; 13 14 public class Activity01 extends Activity {15 @ Override16 protected void onCreate (Bundle savedInstance State) {17 // TODO Auto-generated method stub18 setTitle ("java code create view"); 19 super. onCreate (savedInstanceState); 20/* 21 * java code to create the view Method 22*1. First create the view object 23*2. Fill in the view with R. layout. activity01 page 24*3. Add various controls (such as TextView and Button) to the view object ), note that you must convert it to the ViewGroup type before adding 25*4. Finally, you can fill the view object to the page, that is, you can fill the value of setContentView into a view object, and 26*27 * Create a control method, take TextView as an example 28*1. Create TextView object 29*2. Set layout parameters for TextView object 30*3. Set other properties for TextView object 3. 1*32 */33 View view = View. inflate (this, R. layout. activity01, null); 34 35 LayoutParams layoutParams = new LayoutParams (LayoutParams. MATCH_PARENT, 36 LayoutParams. WRAP_CONTENT); 37 TextView textView = new TextView (this); 38 textView. setLayoutParams (layoutParams); 39 textView. setBackgroundColor (Color. CYAN); 40 textView. setText ("hello, stranger !!! "); 41 42 43 (RelativeLayout) view). addView (textView); 44 45 46 setContentView (view); 47} 48}