1

私は新しいプロジェクトを開始しようとしていましたが、開始したときに何も機能しませんでした。過去数時間コードを見て遊んでみましたが、前回この問題が発生したときにどのように修正したか思い出せません。

package org.waldev.canvascollisiontest;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class CollisionTest extends Activity {
private Panel game;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    game = new Panel(this);
    setContentView(game);
}

public class Panel extends SurfaceView implements SurfaceHolder.Callback{
    Threads thread;

    public Panel(Context context) {
        super(context);
        thread = new Threads(this.getHolder(), this);
        setFocusable(true);
    }

    public void onDraw(Canvas c)
    {
        c.drawColor(Color.BLUE);
    }
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        // TODO Auto-generated method stub
    }

    //when the game starts, run the thread\
    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        holder.setFormat(PixelFormat.RGB_565);
        thread.setRunning(true);
        thread.start();
    }

    //if its destroyed, then destroy the thread
    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        // TODO Auto-generated method stub
        boolean retry = true;
        thread.setRunning(false);
        while (retry) {
            try {
                thread.join();
                //                  bitmaps.recycleAll();
                retry = false;
            } catch (InterruptedException e) {
                // we will try it again and again...
            }
        }
    }

}
}

そしてスレッド：

package org.waldev.canvascollisiontest;

import org.waldev.canvascollisiontest.CollisionTest.Panel;

import android.graphics.Canvas;
import android.view.SurfaceHolder;

public class Threads extends Thread{
SurfaceHolder surfaceHolder;
private Panel game;

private Canvas c;
private boolean isRunning = true;

// desired fps
private final static int    MAX_FPS = 24;
// maximum number of frames to be skipped
private final static int    MAX_FRAME_SKIPS = 0;
// the frame period
private final static int    FRAME_PERIOD = 1000 / MAX_FPS;  


public Threads(SurfaceHolder surfaceHolder, Panel panel){
    this.surfaceHolder = surfaceHolder;
    game = panel;
}

public void setRunning(boolean run){
    isRunning = run;
}

public boolean getRunning(){
    return isRunning();
}

public SurfaceHolder getSurface(){
    return surfaceHolder;
}

@Override
public void run() {
    Canvas canvas;

    long beginTime;     // the time when the cycle begun
    long timeDiff;      // the time it took for the cycle to execute
    int sleepTime;      // ms to sleep (<0 if we're behind)
    int framesSkipped;  // number of frames being skipped 
    boolean updated = false;

    sleepTime = 0;

    while (isRunning) {
        canvas = null;
        try {
            canvas = this.surfaceHolder.lockCanvas();
            synchronized (surfaceHolder) {
                beginTime = System.currentTimeMillis();
                framesSkipped = 0;
                if(canvas != null)
                {
                    game.onDraw(canvas);
                }
                timeDiff = System.currentTimeMillis() - beginTime;
                sleepTime = (int)(FRAME_PERIOD - timeDiff);

                if (sleepTime > 0) {
                    try {
                        Thread.sleep(sleepTime);
                    } catch (InterruptedException e) {}
                }
                else
                {
                    updated = false;
                }
            }
        } finally {
            // in case of an exception the surface is not left in
            // an inconsistent state
            if (canvas != null) {
                surfaceHolder.unlockCanvasAndPost(canvas);
            }
        }   // end finally
    }
}
public boolean isRunning() {
    return isRunning;
}
}

そこにいくつかのブレークポイントを投げましたが、CollisionTest で surfaceCreated を呼び出すことはありません。ここで見逃しているのはばかげているに違いないことはわかっているので、もしそれを見たら教えてください. ありがとう！

ウィリアム

4

1 に答える 1

2

私はそれを機能させました、私は追加するのを忘れました:

getHolder().addCallback(this);

パネルのコンストラクターに、それが機能しない原因となっていました。ありがとう！

于 2012-12-21T16:14:06.987 に答える