Android多个SurfaceView
我尝试在一个屏幕上使用3个SurfaceView，一个在上半部分（BoardView），一个在下半部分（StatusView），最后一个作为上半部分（TileView）上方的额外层（请参见main.xml） 我创建了一个类MySurfaceView，它由BoardView、StatusView和TileView扩展 我有很多问题 让我先给出代码 main.xml：Android多个SurfaceView,android,surfaceview,ondraw,Android,Surfaceview,Ondraw,我尝试在一个屏幕上使用3个SurfaceView，一个在上半部分（BoardView），一个在下半部分（StatusView），最后一个作为上半部分（TileView）上方的额外层（请参见main.xml） 我创建了一个类MySurfaceView，它由BoardView、StatusView和TileView扩展 我有很多问题 让我先给出代码 main.xml： <?xml version="1.0" encoding="utf-8"?> <RelativeLayout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/main_background">
<com.niek.test.BoardView
android:id="@+id/boardview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/boardview">
<com.niek.test.StatusView
android:id="@+id/statusview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#F0931E"
android:layout_below="@+id/boardview" />
<com.niek.test.TileView
android:id="@+id/tileview"
android:layout_width="180dip"
android:layout_height="60dip"
android:layout_gravity="bottom"/>
</FrameLayout>
</RelativeLayout>
package com.niek.test;
public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback {
protected DrawThread drawThread;
public MyView(Context context, AttributeSet attrs) {
super(context, attrs);
getHolder().addCallback(this);
setFocusable(true);
drawThread = new DrawThread(getHolder());
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
drawThread.setRunning(true);
drawThread.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// we have to tell thread to shut down & wait for it to finish, or else
// it might touch the Surface after we return and explode
boolean retry = true;
drawThread.setRunning(false);
while (retry) {
try {
drawThread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
protected class DrawThread extends Thread {
private SurfaceHolder surfaceHolder;
private boolean isRunning;
public DrawThread(SurfaceHolder surfaceHolder) {
this.surfaceHolder = surfaceHolder;
isRunning = false;
}
public void setRunning(boolean run) {
isRunning = run;
}
public void run() {
Canvas c;
while (isRunning) {
try {
Thread.sleep(100);
} catch (Exception e) {
// TODO: handle exception
}
c = null;
try {
c = surfaceHolder.lockCanvas(null);
synchronized (surfaceHolder) {
onDraw(c);
postInvalidate();
}
} finally {
// do this in a finally so that if an exception is thrown
// during the above, we don't leave the Surface in an
// inconsistent state
if (c != null) {
surfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
}
}
package com.niek.test;
public class TileView extends MySurfaceView {
public TileView(Context context, AttributeSet attrs) {
super(context, attrs);
System.out.println(0);
}
int tmp =0;
@Override
public void onDraw(Canvas c) {
System.out.println(2);
Paint p= new Paint();
p.setColor(Color.RED);
c.drawColor(Color.RED);
c.drawText(tmp+"",10,10,p);
tmp++;
}
}
package com.niek.test;
public class BoardView extends MySurfaceView {
private int squareSize, marginX, marginY;
private Board board;
Paint boardBorder;
public BoardView(Context context, AttributeSet attrs) {
super(context, attrs);
board = null;
}
public void setBoard(Board board) {
this.board = board;
}
private void init(SurfaceHolder holder) {
Canvas canvas = null;
try {
canvas = holder.lockCanvas();
/* Initialize the board */
squareSize = canvas.getWidth() / Board.GRIDSIZE;
/* Size the view */
LayoutParams lp = getLayoutParams();
lp.height = (squareSize * Board.GRIDSIZE) + 4;
setLayoutParams(lp);
/* Place the board neatly in the center */
marginX = (canvas.getWidth() - (squareSize * Board.GRIDSIZE)) / 2;
marginY = 1;
} finally {
holder.unlockCanvasAndPost(canvas);
}
boardBorder = new Paint();
boardBorder.setColor(Color.RED);
boardBorder.setStyle(Style.STROKE);
}
@Override
public void onDraw(Canvas canvas) {
drawBoard(board, canvas);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
init(holder);
super.surfaceCreated(holder);
}
private void drawBoard(Board board, Canvas canvas) {
synchronized (board) {
if (board != null) {
for (Square[] ys : board.getSquares()) {
for (Square xs : ys) {
xs.onDraw(canvas, squareSize, squareSize, marginX, marginY);
}
}
}
canvas.drawRect(marginX - 1, marginY - 1, marginX + squareSize * Board.GRIDSIZE + 1, marginY + squareSize * Board.GRIDSIZE + 1, boardBorder);
}
}
}
package com.niek.test;
public class StatusView extends MySurfaceView {
private Board board;
private Paint textPaint;
public StatusView(Context context, AttributeSet attrs) {
super(context, attrs);
board = null;
textPaint = new Paint();
textPaint.setColor(Color.BLACK);
textPaint.setTextSize(20);
textPaint.setTypeface(Typeface.DEFAULT_BOLD);
}
public void setBoard(Board board) {
this.board = board;
}
int tmp=0;
@Override
public void onDraw(Canvas c) {
if (board != null) {
c.drawText(tmp+"", 10, 20, textPaint);
tmp++;
System.out.println(tmp);
}
}
}
package com.niek.test;
public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback {
protected DrawThread drawThread;
public MyView(Context context, AttributeSet attrs) {
super(context, attrs);
getHolder().addCallback(this);
setFocusable(true);
drawThread = new DrawThread(getHolder());
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
drawThread.setRunning(true);
drawThread.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// we have to tell thread to shut down & wait for it to finish, or else
// it might touch the Surface after we return and explode
boolean retry = true;
drawThread.setRunning(false);
while (retry) {
try {
drawThread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
protected class DrawThread extends Thread {
private SurfaceHolder surfaceHolder;
private boolean isRunning;
public DrawThread(SurfaceHolder surfaceHolder) {
this.surfaceHolder = surfaceHolder;
isRunning = false;
}
public void setRunning(boolean run) {
isRunning = run;
}
public void run() {
Canvas c;
while (isRunning) {
try {
Thread.sleep(100);
} catch (Exception e) {
// TODO: handle exception
}
c = null;
try {
c = surfaceHolder.lockCanvas(null);
synchronized (surfaceHolder) {
onDraw(c);
postInvalidate();
}
} finally {
// do this in a finally so that if an exception is thrown
// during the above, we don't leave the Surface in an
// inconsistent state
if (c != null) {
surfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
}
}
package com.niek.test;
public class TileView extends MySurfaceView {
public TileView(Context context, AttributeSet attrs) {
super(context, attrs);
System.out.println(0);
}
int tmp =0;
@Override
public void onDraw(Canvas c) {
System.out.println(2);
Paint p= new Paint();
p.setColor(Color.RED);
c.drawColor(Color.RED);
c.drawText(tmp+"",10,10,p);
tmp++;
}
}
try {
c = surfaceHolder.lockCanvas(null);
synchronized (surfaceHolder) {
onDraw(c);
postInvalidate();
}
}
为清楚起见，我根据教程创建了此视图。看起来您不应该在一个布局上创建多个SurfaceView。 根据Android框架工程师撰写的这篇文章： 曲面视图的实现方式是在其包含窗口后面创建一个单独的曲面并按Z顺序排列，并将透明像素绘制到曲面视图所在的矩形中，以便可以看到后面的曲面。我们从未打算允许多个曲面视图 及 您应该有效地将SurfaceView视为嵌入窗口中的覆盖层， 为您提供一个区域，在该区域中，您可以独立于法线视图更新系统直接绘制 因此，您可以使用一个SurfaceView来绘制所需的所有图形。在一个布局中可以有多个
SurfaceViewSurfaceViewSurfaceViewSurfaceView
+ZOrderOnTopSurfaceView- （应用程序界面在这里）
+ZOrderMediaOverlaySurfaceView
（默认）SurfaceView
SurfaceViews更新：如果您真的想了解SurfaceView是如何工作的，请参阅。听起来好像正在绘制SurfaceView，但顶部的任何一个都不启用透明度。在surfaceCreated（）方法的MySurfaceView类中，确保调用的是
holder.setFormat（PixelFormat.TRANSPARENT）那么我可以在不同的家长中添加两个surfaceview吗？这个答案有误导性。从fadden的回答中，在该工程师的帖子链接后，我们读到：“在2.0之前，不支持多个相互重叠的曲面……从2.0开始，有一个黑客可以用来至少控制两个曲面视图的Z顺序”。关键短语相互重叠。即使在2.0之前，非重叠曲面也没有问题。（参见fadden的答案，链接到Grafika source，它演示了这一点。）2.0之后，即使是重叠的表面也可以处理，只需一点努力。这应该被标记为答案。谢谢你@fadden@fadden:嗨，首先，谢谢你的回答！如果有两个SurfaceView，而其中一个总是隐藏的（View.INVISIBLE）？对于那些来到这里但正在使用GLSurfaceView
的读者来说：但是，如果您试图有两个GLSurfaceView
，而不仅仅是两个surfaceView
，那就行不通了。（关于锁定GL线程的内容）因此Grafika使用的方法是创建自己的GL线程，并管理对该线程上不同SurfaceView
的访问。这应该被标记为答案。多谢各位@fadden@ToolmakerSteve嘿，你能告诉我你在格拉菲卡密码里到底指的是什么吗？我需要同时使用GLSURFACHEVIEW和SURFACHEVIEW，并面临类似的问题。