double a = Math.sqrt(s + 3 * Math.pow(t, 1 + n));
b | = |
|
double b = (2 * s * Math.pow(t * (1 + n)) / (1 - 5 * Math(u + 2, 2 * n));
int n = 476; String s = (n >= 500) ? "large" : "small";
public class RollDice { public static ArrayList<Integer> roll(int numDiceFaces) { ArrayList<Integer> rolls = new ArrayList<Integer>( ); Random r = new Random( ); int die1 = r.nextInt(numDieFaces) + 1; int die2 = r.nextInt(numDieFaces) + 1; rolls.add(die1); rolls.add(die2); return rolls; } }Use android:orientation="horizontal" for the linear layout.
Toast t = Toast.makeText(getApplicationContext( ), "Testing the toast.", Toast.LENGTH_LONG); t.show( );
Toast.makeText(getApplicationContext( ), "Testing the toast.", Toast.LENGTH_LONG).show( );
// Set up array list. ArrayList<Integer> arrList = new ArrayList<Integer>( ); for(int n = 1001; n <= 1005; n++) { arrList.add(n); } // Set up array adapter. ArrayAdapter<Integer> adapter = new ArrayAdapter<Integer>( this, android.R.layout.simple_list_item_1, arrList); spinner1.setAdapter(adapter);
Event | Event Handler | Description | Required |
---|---|---|---|
ON_CREATE | onCreate | Fires immediately after the activity is first created. | Yes |
ON_START | onStart | Fires immediately after the activity becomes visible. It prepares the activity to move into the foreground and become interactive. | No |
ON_RESUME | onResume | Fires when the activity moves into the foreground after going into the background. | No |
ON_RESTART | onRestart | Fires when a covered activity moves into the foreground after being stopped, but not destroyed. | No |
ON_PAUSE | onPause | Fires immediately before the activity moves into the background. It may still be visible. | No |
ON_STOP | onStop | Fires when the activity has finished running and is no longer visible to the user, but may still be in memory. | No |
ON_DESTROY | onDestroy | Fires immediately before an app has terminated and is about to be unloaded from memory. | No |
@Override public void onCreate(...) { super.onCreate(...); openGarageDoor( ); unlockCar( ); getInCar( ); closeCarDoor( ); putOnSeatBelt( ); putKeyInIgnition( ); } @Override public void onStart( ) { super.onStart( ); startEngine( ); changeRadioStation( ); switchOnLightsIfNeeded( ); switchOnWipersIfNeeded( ); } @Override public void onResume( ) { super.onResume( ); applyFootbrake( ); releaseHandbrake( ); putCarInGear( ); drive( ); } @Override public void onPause( ) { super.onPause( ); putCarInNeutral( ); applyHandbrake( ); } @Override public void onStop( ) { super.onStop( ); switchOffLights( ); switchOffRadio( ); switchOffHeater( ); turnOffEngine( ); removeSeatBelt( ); getOutOfCar( ); lockCar( ); } @Override public void onDestroy( ) { super.onDestroy( ); goToOfficeBuilding( ); } @Override protected void onRestart() { unlockCar( ); getInCar( ); closeCarDoor( ); putOnSeatBelt( ); putKeyInIgnition( ); }Reference:
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); System.out.println("In onCreate method"); }
@Override public void onStart() { super.onStart( ); System.out.println("In onStart method"); }