ANDROID APP

120 บทที่ 5 อีเวนต์ต่างๆ ที่เกิดขึ้นในส่วนการติดต่อกับผู้ใช้งาน
public class PhysicalKeyPress extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_CAMERA:
Toast.makeText(this, "Pressed Camera Button",
Toast.LENGTH_LONG).show();
return true;
case KeyEvent.KEYCODE_DPAD_LEFT:
Toast.makeText(this, "Pressed DPAD Left Button",
Toast.LENGTH_LONG).show();
return true;
case KeyEvent.KEYCODE_VOLUME_UP:
Toast.makeText(this, "Pressed Volume Up Button",
Toast.LENGTH_LONG).show();
return false;
case KeyEvent.KEYCODE_SEARCH:
//example of tracking through to the KeyUp
if(event.getRepeatCount() == 0)
event.startTracking();
return true;
case KeyEvent.KEYCODE_BACK:
// Make new onBackPressed compatible with earlier SDK's
if (android.os.Build.VERSION.SDK_INT
< android.os.Build.VERSION_CODES.ECLAIR
&& event.getRepeatCount() == 0) {
onBackPressed();
}
}
return super.onKeyDown(keyCode, event);
}
public void onBackPressed() {
Toast.makeText(this, "Pressed BACK Key",
Toast.LENGTH_LONG).show();
}
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_SEARCH && event.isTracking()
&& !event.isCanceled()) {
Toast.makeText(this, "Pressed SEARCH Key",
Toast.LENGTH_LONG).show();
return true;