Android onMeasure()测量宽度,但不测量高度
我有一个SurfaceView,我需要知道的宽度和高度,代码如下:Android onMeasure()测量宽度,但不测量高度,android,view,size,measure,Android,View,Size,Measure,我有一个SurfaceView,我需要知道的宽度和高度,代码如下: protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); screenWidth = MeasureSpec.getSize(widthMeasureSpec); screenHeight = MeasureSpe
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
screenWidth = MeasureSpec.getSize(widthMeasureSpec);
screenHeight = MeasureSpec.getSize(heightMeasureSpec);
}
出于某种原因,它可以测量这个视图的宽度,但不能测量它的高度。我试着将高度测量放在宽度测量之前,看看它是否调用onMeasure()方法不够快,但它不起作用
编辑:
以下是所有代码:
public class GameView extends SurfaceView {
GameLoopThread gameLoopThread;
Integer screenWidth, screenHeight;
static Integer score;
long lastTime = 0;
byte speed = 5;
static Boolean mute;
static String textureUsed = "space";
public GameView(Context context) {
super(context);
mute = MainMenu.getMute();
score = 0;
gameLoopThread = new GameLoopThread(this);
SurfaceHolder holder = getHolder();
holder.addCallback(new Callback() {
public void surfaceChanged(SurfaceHolder holder, int format,
int width, int height) {
}
public void surfaceCreated(SurfaceHolder holder) {
gameLoopThread.setRunning(true);
gameLoopThread.start();
}
public void surfaceDestroyed(SurfaceHolder holder) {
boolean retry = true;
gameLoopThread.setRunning(false);
while (retry) {
try {
gameLoopThread.join();
retry = false;
} catch (InterruptedException e) {
}
}
}
});
}
// graphics are drawn here
@Override
protected void onDraw(Canvas canvas) {
//covers the whole canvas in white to clear previouslly draw graphics
canvas.drawColor(Color.WHITE);
//set the location of the players selected texture pack
int resID = getResources().getIdentifier(textureUsed, "drawable", "com.unreturnablestudios.FlipSide");
//loads this texture pack
Bitmap graphics = BitmapFactory.decodeResource(getResources(), resID);
//src and dst are used to detarmine which parts of the image are
//going to be used and where abouts on the screen they are going
//to be displayed
Rect src = new Rect(0, 0, 640, 480);
Rect dst = new Rect(0, 0, screenWidth, screenHeight);
canvas.drawBitmap(graphics, src, dst, null);
// sets the style of the text up
String scoreString = Integer.toString(score);
Paint paint = new Paint();
paint.setColor(Color.RED);//red font
paint.setTypeface(Typeface.DEFAULT);//Uses the players default font
paint.setTextSize(screenWidth / 10);//font size
//draws the text
canvas.drawText(scoreString,0, 0, paint);
score -= speed;
}
// deals with user touching the screen
@Override
public boolean onTouchEvent(MotionEvent event) {
double X = event.getX();
long currentTime = System.currentTimeMillis();
if (currentTime > lastTime + 100) {
if (X < (screenWidth / 2) && X != 0) {
} else {
}
}
lastTime = System.currentTimeMillis();
return super.onTouchEvent(event);
}
public void launchEnd() {
Context context = getContext();
Intent openEnd = new Intent("com.unreturnablestudios.FlipSide.END");
context.startActivity(openEnd);
gameLoopThread.setRunning(false);
}
public static Integer getScore() {
// called by the End class and returns the score.
return score;
}
public static boolean getMute() {
// called by the End class and returns the boolean that is in control of
// sound
return mute;
}
// gets the measurements of the screen (width and height)
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
screenWidth = MeasureSpec.getSize(widthMeasureSpec);
screenHeight = MeasureSpec.getSize(heightMeasureSpec);
}
}
公共类GameView扩展了SurfaceView{
GameLoopThread GameLoopThread;
整数屏幕宽度,屏幕高度;
静态整数分;
长时间=0;
字节速度=5;
静态布尔静音;
静态字符串textureUsed=“space”;
公共游戏视图(上下文){
超级(上下文);
静音=主菜单。getMute();
得分=0;
gameLoopThread=新gameLoopThread(此);
SurfaceHolder holder=getHolder();
holder.addCallback(新回调(){
公共无效表面更改(表面文件夹持有者,整数格式,
整数宽度,整数高度){
}
已创建的公共空白表面(表面持有人){
gameLoopThread.setRunning(true);
gameLoopThread.start();
}
公共空间表面覆盖(表面覆盖物持有人){
布尔重试=真;
gameLoopThread.setRunning(false);
while(重试){
试一试{
gameLoopThread.join();
重试=错误;
}捕捉(中断异常e){
}
}
}
});
}
//这里画的是图形
@凌驾
受保护的void onDraw(画布){
//用白色覆盖整个画布以清除先前绘制的图形
画布。drawColor(颜色。白色);
//设置玩家所选纹理包的位置
int resID=getResources().getIdentifier(使用纹理,“drawable”,“com.unreturnablestudios.FlipSide”);
//加载此纹理包
位图图形=BitmapFactory.decodeResource(getResources(),resID);
//src和dst用于确定图像的哪些部分是
//将要被使用,以及他们将在屏幕上的位置
//展示
Rect src=新的Rect(0,060480);
Rect dst=新的Rect(0,0,屏幕宽度,屏幕高度);
drawBitmap(图形、src、dst、null);
//设置文本的样式
字符串scoreString=Integer.toString(分数);
油漆=新油漆();
paint.setColor(Color.RED);//红色字体
paint.setTypeface(Typeface.DEFAULT);//使用默认字体
paint.setTextSize(屏幕宽度/10);//字体大小
//绘制文本
drawText(scoreString,0,0,paint);
分数-=速度;
}
//处理用户触摸屏幕的问题
@凌驾
公共布尔onTouchEvent(运动事件){
double X=event.getX();
长currentTime=System.currentTimeMillis();
如果(当前时间>上次时间+100){
如果(X<(屏幕宽度/2)和&X!=0){
}否则{
}
}
lastTime=System.currentTimeMillis();
返回super.onTouchEvent(事件);
}
公共无效启动(){
Context=getContext();
Intent openEnd=newintent(“com.unreturnablestudios.FlipSide.END”);
背景。起始触觉(开放性);
gameLoopThread.setRunning(false);
}
公共静态整数getScore(){
//由结束类调用并返回分数。
返回分数;
}
公共静态布尔getMute(){
//由End类调用,并返回控制
//声音
返回静音;
}
//获取屏幕的测量值(宽度和高度)
测量时的保护空隙(内部宽度测量等级、内部高度测量等级){
超级测量(宽度测量、高度测量);
screenWidth=MeasureSpec.getSize(widthMeasureSpec);
屏幕高度=测量等级getSize(高度测量等级);
}
}
奇怪的是,我以前在这个应用程序的前一个版本中使用过onMeasure(),它工作得很好,但我决定修改大部分代码,使它运行得更快,现在它不工作了。onMeasure经常被布局过程调用多次,您检查过它没有被多次调用吗
通常我所看到的是,对于某些布局,第一次测量视图宽度称为第一次,然后在锁定所有视图宽度后,第二次测量高度。如何实例化它?在代码或XML中,请根据需要显示。我只是再次查看了代码,似乎度量值不是问题,因为某种原因,它是src矩形,我试图绘制一个480px高的图像的一部分,但如果我使用480的值,它会被截断,然后我需要使它看起来像图像没有正确缩放。