Activity key event : Activity « UI « Android

1. Android
2. UI
3. Activity

Activity key event

     
package app.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Test extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button btn1 = (Button) findViewById(R.id.btn1);
    btn1.setOnClickListener(btnListener);

    Button btn2 = (Button) findViewById(R.id.btn2);
    btn2.setOnClickListener(btnListener);

    EditText txt1 = (EditText) findViewById(R.id.txt1);
    txt1.setOnFocusChangeListener(new View.OnFocusChangeListener() {
      @Override
      public void onFocusChange(View v, boolean hasFocus) {
        Toast.makeText(getBaseContext(),
            ((EditText) v).getId() + " has focus - " + hasFocus,
            Toast.LENGTH_LONG).show();
      }
    });
  }

  private OnClickListener btnListener = new OnClickListener() {
    public void onClick(View v) {
      Toast.makeText(getBaseContext(),
          ((Button) v).getText() + " was clicked", Toast.LENGTH_LONG)
          .show();
    }
  };

  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    switch (keyCode) {
    case KeyEvent.KEYCODE_DPAD_CENTER:
      Toast.makeText(getBaseContext(), "Center was clicked",
          Toast.LENGTH_LONG).show();
      break;
    case KeyEvent.KEYCODE_DPAD_LEFT:
      Toast.makeText(getBaseContext(), "Left arrow was clicked",
          Toast.LENGTH_LONG).show();
      break;
    case KeyEvent.KEYCODE_DPAD_RIGHT:
      Toast.makeText(getBaseContext(), "Right arrow was clicked",
          Toast.LENGTH_LONG).show();
      break;
    case KeyEvent.KEYCODE_DPAD_UP:
      Toast.makeText(getBaseContext(), "Up arrow was clicked",
          Toast.LENGTH_LONG).show();
      break;
    case KeyEvent.KEYCODE_DPAD_DOWN:
      Toast.makeText(getBaseContext(), "Down arrow was clicked",
          Toast.LENGTH_LONG).show();
      break;
    }
    return false;
  }
}
//main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:id="@+id/widget28"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android"    
    >
    <TextView        
        android:layout_width="214dp"
        android:layout_height="wrap_content"
        android:text="Your Name"        
        />
    <EditText
        android:id="@+id/txt1"
        android:layout_width="214dp"
        android:layout_height="wrap_content"        
        />   
    <Button
        android:id="@+id/btn1"
        android:layout_width="106dp"
        android:layout_height="wrap_content"
        android:text="OK"
        />
    <Button
        android:id="@+id/btn2"
        android:layout_width="106dp"
        android:layout_height="wrap_content"
        android:text="Cancel"
        />
</LinearLayout>

   
    
    
    
    
  

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