Capturing keyevent

falcon · by **falcon** » Thu Feb 21, 2008 6:55 am

Hey plusminus,
great work!!!!
I wanted to know that how can we capture a keypress and to display it on the screen......for example if I press J on the android mobile keypad then the screen should display J on the screen.[font=Arial] [/font]

venkat · by **venkat** » Thu Feb 21, 2008 9:48 am

Hi falcon, This is very simple.

mail.xml

Syntax: [ Download ] [ Hide ]

Using xml Syntax Highlighting

<?xml version="1.0" encoding="utf-8"?>
<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/key"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Hello World, keypress"
    />
</LinearLayout>
Parsed in 0.003 seconds,  using GeSHi 1.0.8.4

That's it.

keypress.java

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.TextView;
 
public class keypress extends Activity {
    /** Called when the activity is first created. */
        TextView tv;
        @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        tv=(TextView)findViewById(R.id.key);
                tv.setText("Press Any Key");
                
                
    }
 
 
        
        public boolean onKeyDown(int keyCode, KeyEvent event) {
                // TODO Auto-generated method stub
           
                //get the key code and convert into ASCII Code. 
                int keypressed='A'+keyCode-29;
                
                //Convert ASCII Code into String.  and show it. 
                tv.setText("You have pressed:  "+(char)keypressed);
return super.onKeyDown(keyCode, event);
        } 
}
Parsed in 0.033 seconds,  using GeSHi 1.0.8.4

It will work only for "A - Z " Thats it

falcon · by **falcon** » Thu Feb 21, 2008 12:18 pm

Thanks a lot[font=Arial] [/font]

venkat · by **venkat** » Thu Feb 21, 2008 12:23 pm

you are welcome. Feel free to ask you doubt.

Capturing keyevent

Capturing keyevent

Who is online