0
私は左上隅にカウントダウンタイマーを持つゲームを作成しようとしています。Androidスタジオでカウントダウンタイマーを設定する
私はTextViewボックスを作成し、それを '時間'と呼んでいましたが、私が見る限り、タイマーを正しく設定しましたが、何も表示されません。
私のコードは以下の通りです：
public class GameView extends SurfaceView implements SurfaceHolder.Callback {
/* Member (state) fields */
private GameLoopThread gameLoopThread;
private Paint paint; //Reference a paint object
/** The drawable to use as the background of the animation canvas */
private Bitmap mBackgroundImage;
// For creating the game Sprite
private Sprite sprite;
// For recording the number of hits
private int hitCount;
public GameView(Context context) {
super(context);
// Focus must be on GameView so that events can be handled.
this.setFocusable(true);
// For intercepting events on the surface.
this.getHolder().addCallback(this);
// Background image added
mBackgroundImage = BitmapFactory.decodeResource(this.getResources(), R.drawable.half_moon);
}
/* Called immediately after the surface created */
public void surfaceCreated(SurfaceHolder holder) {
// We can now safely setup the game start the game loop.
ResetGame();//Set up a new game up - could be called by a 'play again option'
mBackgroundImage = Bitmap.createScaledBitmap(mBackgroundImage, getWidth(), getHeight(), true);
gameLoopThread = new GameLoopThread(this.getHolder(), this);
gameLoopThread.running = true;
gameLoopThread.start();
}
// For the countdown timer
private long startTime; // Timer to count down from
private final long interval = 1 * 1000; // 1 sec interval
private CountDownTimer countDownTimer; // Reference to the class
private boolean timerRunning = false;
private String displayTime; // To display the time on the screen
private TextView time = (TextView) findViewById(R.id.time);
// Countdown Timer - private class
private class MyCountDownTimer extends CountDownTimer {
public MyCountDownTimer (long startTime, long interval) {
super(startTime, interval);
}
public void onFinish() {
displayTime = "Time is up!";
timerRunning = false;
countDownTimer.cancel();
}
public void onTick (long millisUntilFinished) {
displayTime = " " + millisUntilFinished/1000;
}
}
//To initialise/reset game
private void ResetGame(){
/* Set paint details */
paint = new Paint();
paint.setColor(Color.WHITE);
paint.setTextSize(20);
sprite = new Sprite(this);
hitCount = 0;
// Set timer
startTime = 10; // Start at 10s to count down
// Create new object - convert startTime to milliseconds
countDownTimer = new MyCountDownTimer(startTime*1000, interval);
countDownTimer.start(); // Start the time running
timerRunning = true;
}
//This class updates and manages the assets prior to drawing - called from the Thread
public void update(){
sprite.update();
}
/**
* To draw the game to the screen
* This is called from Thread, so synchronisation can be done
*/
public void doDraw(Canvas canvas) {
//Draw all the objects on the canvas
canvas.drawBitmap(mBackgroundImage, 0, 0, null);
canvas.drawText("The Game ",15,25, paint);
sprite.draw(canvas);
}
//To be used if we need to find where screen was touched
public boolean onTouchEvent(MotionEvent event) {
if (sprite.wasItTouched(event.getX(), event.getY())) {
// This just renews the sprite for now
sprite = new Sprite(this);
hitCount++;
}
return true;
}
public void surfaceDestroyed(SurfaceHolder holder) {
gameLoopThread.running = false;
// Shut down the game loop thread cleanly.
boolean retry = true;
while(retry) {
try {
gameLoopThread.join();
retry = false;
} catch (InterruptedException e) {}
}
}
public void getHitCount() {
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
}
は、あなたがのTextView内のテキストを設定していない知っているあなたのneeds.Pleaseを満たしていない場合。それで空のテキストを表示します。 –