我有应用程序中所有屏幕的背景和动画。我有 使用表面视图和线程创建了动画背景。
下面
是我的SurfaceView班。
public class FloatingCirclesPanel extends SurfaceView implements
SurfaceHolder.Callback {
private static final String TAG = FloatingCirclesPanel.class
.getSimpleName();
public MainThread thread;
private Circle circle_white1;
private Circle circle_blue1;
private Circle circle_white2;
private Circle circle_blue2;
private Bitmap scaled;
Canvas canvas = null;
private Display mdisp;
private Context context;
private RotateAnimation anim;
private Matrix matrix;
@SuppressLint("NewApi")
public FloatingCirclesPanel(Context context) {
super(context);
this.context = context;
matrix = new Matrix();
// adding the callback (this) to the surface holder to intercept events
getHolder().addCallback(this);
// create droid and load bitmap
circle_white1 = new Circle(BitmapFactory.decodeResource(getResources(),
R.drawable.circle), 50, 50);
mdisp = ((Activity) getContext()).getWindowManager()
.getDefaultDisplay();
Point mdispSize = new Point();
mdisp.getSize(mdispSize);
int maxX = mdispSize.x;
int maxY = mdispSize.y;
Bitmap b = scaleDown(BitmapFactory.decodeResource(getResources(),
R.drawable.circle_img), 300, true);
Bitmap b1 = scaleDown(BitmapFactory.decodeResource(getResources(),
R.drawable.circle_img), 130, true);
Bitmap b2 = scaleDown(
BitmapFactory.decodeResource(getResources(), R.drawable.circle),
100, true);
// droid1 = new Droid(BitmapFactory.decodeResource(getResources(),
// R.drawable.icon), 150, 150);
if (b != null) {
circle_blue1 = new Circle(b, 500, 500);
} else {
circle_blue1 = new Circle(BitmapFactory.decodeResource(
getResources(), R.drawable.circle_img), 500, 500);
}
if (b1 != null) {
circle_white2 = new Circle(b1, 800, 800);
} else {
circle_white2 = new Circle(BitmapFactory.decodeResource(
getResources(), R.drawable.circle), 800, 800);
}
if (b2 != null) {
circle_blue2 = new Circle(b2, 1500, 1500);
} else {
circle_blue2 = new Circle(BitmapFactory.decodeResource(
getResources(), R.drawable.circle_img), 1500, 1500);
}
// droid3 = new Droid(BitmapFactory.decodeResource(getResources(),
// R.drawable.icon), 150, 150);
// create the game loop thread
thread = new MainThread(getHolder(), this, context);
// make the GamePanel focusable so it can handle events
setFocusable(true);
}
public FloatingCirclesPanel(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public FloatingCirclesPanel(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
public static Bitmap scaleDown(Bitmap realImage, float maxImageSize,
boolean filter) {
float ratio = Math.min((float) maxImageSize / realImage.getWidth(),
(float) maxImageSize / realImage.getHeight());
int width = Math.round((float) ratio * realImage.getWidth());
int height = Math.round((float) ratio * realImage.getHeight());
Bitmap newBitmap = Bitmap.createScaledBitmap(realImage, width, height,
filter);
return newBitmap;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// at this point the surface is created and
// we can safely start the game loop
if (thread != null && (thread.getState() == Thread.State.NEW)) {
thread.setRunning(true);// riga originale
thread.start();// riga originale
}
// after a pause it starts the thread again
else if (thread != null && thread.getState() == Thread.State.TERMINATED) {
thread = new MainThread(getHolder(), this, context);
;
thread.setRunning(true);
thread.start(); // Start a new thread
}
// thread.setRunning(true);
// thread.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.d(TAG, "Surface is being destroyed");
// tell the thread to shut down and wait for it to finish
// this is a clean shutdown
boolean retry = true;
while (retry) {
try {
thread.interrupt();
retry = false;
thread = null;
} catch (Exception e) {
// try again shutting down the thread
}
}
Log.d(TAG, "Thread was shut down cleanly");
}
public void render(Canvas canvas) {
if (canvas != null) {
Rect dest = new Rect(0, 0, getWidth(), getHeight());
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);
paint.setFilterBitmap(true);
paint.setDither(true);
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.splashscreen);
canvas.drawBitmap(bitmap, null, dest, paint);
// canvas.drawColor(Color.BLUE);
circle_white1.draw(canvas);
circle_blue1.draw(canvas);
circle_white2.draw(canvas);
circle_blue2.draw(canvas);
}
}
private void createAnimation(Canvas canvas) {
anim = new RotateAnimation(0, 360, getWidth() / 2, getHeight() / 2);
anim.setRepeatMode(Animation.RESTART);
anim.setRepeatCount(Animation.INFINITE);
anim.setDuration(10000L);
((Activity) context).runOnUiThread(new Runnable() {
@Override
public void run() {
startAnimation(anim);
}
});
}
/**
* This is the game update method. It iterates through all the objects and
* calls their update method if they have one or calls specific engine's
* update method.
*/
public void update() {
// check collision with right wall if heading right
if (circle_white1.getSpeed().getxDirection() == Speed.DIRECTION_RIGHT
&& circle_white1.getX() + circle_white1.getBitmap().getWidth()
/ 2 >= getWidth()) {
circle_white1.getSpeed().toggleXDirection();
}
// check collision with left wall if heading left
if (circle_white1.getSpeed().getxDirection() == Speed.DIRECTION_LEFT
&& circle_white1.getX() - circle_white1.getBitmap().getWidth()
/ 2 <= 0) {
circle_white1.getSpeed().toggleXDirection();
}
// check collision with bottom wall if heading down
if (circle_white1.getSpeed().getyDirection() == Speed.DIRECTION_DOWN
&& circle_white1.getY() + circle_white1.getBitmap().getHeight()
/ 2 >= getHeight()) {
circle_white1.getSpeed().toggleYDirection();
}
// check collision with top wall if heading up
if (circle_white1.getSpeed().getyDirection() == Speed.DIRECTION_UP
&& circle_white1.getY() - circle_white1.getBitmap().getHeight()
/ 2 <= 0) {
circle_white1.getSpeed().toggleYDirection();
}
// Update the lone droid
circle_white1.update();
if (circle_blue1.getSpeed().getxDirection() == Speed.DIRECTION_RIGHT
&& circle_blue1.getX() + circle_blue1.getBitmap().getWidth()
/ 2 >= getWidth()) {
circle_blue1.getSpeed().toggleXDirection();
}
// check collision with left wall if heading left
if (circle_blue1.getSpeed().getxDirection() == Speed.DIRECTION_LEFT
&& circle_blue1.getX() - circle_blue1.getBitmap().getWidth()
/ 2 <= 0) {
circle_blue1.getSpeed().toggleXDirection();
}
// check collision with bottom wall if heading down
if (circle_blue1.getSpeed().getyDirection() == Speed.DIRECTION_DOWN
&& circle_blue1.getY() + circle_blue1.getBitmap().getHeight()
/ 2 >= getHeight()) {
circle_blue1.getSpeed().toggleYDirection();
}
// check collision with top wall if heading up
if (circle_blue1.getSpeed().getyDirection() == Speed.DIRECTION_UP
&& circle_blue1.getY() - circle_blue1.getBitmap().getHeight()
/ 2 <= 0) {
circle_blue1.getSpeed().toggleYDirection();
}
// Update the lone droid1
circle_blue1.update();
if (circle_white2.getSpeed().getxDirection() == Speed.DIRECTION_RIGHT
&& circle_white2.getX() + circle_white2.getBitmap().getWidth()
/ 2 >= getWidth()) {
circle_white2.getSpeed().toggleXDirection();
}
// check collision with left wall if heading left
if (circle_white2.getSpeed().getxDirection() == Speed.DIRECTION_LEFT
&& circle_white2.getX() - circle_white2.getBitmap().getWidth()
/ 2 <= 0) {
circle_white2.getSpeed().toggleXDirection();
}
// check collision with bottom wall if heading down
if (circle_white2.getSpeed().getyDirection() == Speed.DIRECTION_DOWN
&& circle_white2.getY() + circle_white2.getBitmap().getHeight()
/ 2 >= getHeight()) {
circle_white2.getSpeed().toggleYDirection();
}
// check collision with top wall if heading up
if (circle_white2.getSpeed().getyDirection() == Speed.DIRECTION_UP
&& circle_white2.getY() - circle_white2.getBitmap().getHeight()
/ 2 <= 0) {
circle_white2.getSpeed().toggleYDirection();
}
// Update the lone droid2
circle_white2.update();
if (circle_blue2.getSpeed().getxDirection() == Speed.DIRECTION_RIGHT
&& circle_blue2.getX() + circle_blue2.getBitmap().getWidth()
/ 2 >= getWidth()) {
circle_blue2.getSpeed().toggleXDirection();
}
// check collision with left wall if heading left
if (circle_blue2.getSpeed().getxDirection() == Speed.DIRECTION_LEFT
&& circle_blue2.getX() - circle_blue2.getBitmap().getWidth()
/ 2 <= 0) {
circle_blue2.getSpeed().toggleXDirection();
}
// check collision with bottom wall if heading down
if (circle_blue2.getSpeed().getyDirection() == Speed.DIRECTION_DOWN
&& circle_blue2.getY() + circle_blue2.getBitmap().getHeight()
/ 2 >= getHeight()) {
circle_blue2.getSpeed().toggleYDirection();
}
// check collision with top wall if heading up
if (circle_blue2.getSpeed().getyDirection() == Speed.DIRECTION_UP
&& circle_blue2.getY() - circle_blue2.getBitmap().getHeight()
/ 2 <= 0) {
circle_blue2.getSpeed().toggleYDirection();
}
// Update the lone droid3
circle_blue2.update();
}
}
我将SurfaceView添加到我的活动中，如下所示
@Override
protected void onStart() {
super.onStart();
View childView = getLayoutInflater().inflate(R.layout.main, null);
circleAnimation = new FloatingCirclesPanel(this);
setContentView(circleAnimation);
final ImageView image = (ImageView) childView.findViewById(R.id.logout);
现在问题是应用程序在浏览应用程序中的屏幕时运行缓慢。
如果我在onStart / onResume中添加了SurfaceView代码，则整个视图会重新设计两次并导致性能问题。
如何改善表现？