Использование SurfaceView в activity_main.xml

Question

У меня есть программа тетрис на Android. часть программы:

вот основная деятельность:

package com.tetris.classictetris;

public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


final ParcelGamesField pgf = new ParcelGamesField(10,20);

        final Button buttonLeft = findViewById(R.id.button_left);
        buttonLeft.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                pgf.moveLeft();
            }
        });

        final Button buttonStartPause = findViewById(R.id.button_start_pause);
        buttonStartPause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(String.valueOf(GameSurface.class));
                startActivity(intent);
            }
        });

        final Button buttonReset = findViewById(R.id.button_reset);
        buttonReset.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });

вот ParcelGamesField:

package com.tetris.classictetris;

public class ParcelGamesField implements GamesField {
    int a,b;
    int[] gamesField;
    int sh;
    int state;

public ParcelGamesField(int a, int b) {
    this.a = a;
    this.b = b;
    gamesField = new int[a*b];
}

class Field extends View {
    private Rect mRectField;
    private Rect mRectSquare;
    private Paint mPaint;
    private Paint mPaintErase;

    public Field(Context context, AttributeSet attrs) {
        super(context, attrs);

        mRectField = new Rect();
        mRectSquare = new Rect();
        mPaint = new Paint();
        mPaintErase = new Paint();
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setColor(0x80000000);
        mPaintErase.setStyle(Paint.Style.STROKE);
        mPaintErase.setColor(0x80FFFFFF);
    }

    @Override
    protected void onDraw(Canvas canvas) {

        Rect rf = mRectField;
        Rect rs = mRectSquare;
        Paint paint = mPaint;
        Paint paintErase = mPaintErase;

        canvas.drawRect(0,0,501,1001,paint);
        for (int j=0; j < b; j++){
            for (int i=0; i < a; i++){
                if ( gamesField[i+a*j] == 1 ) {
                    canvas.drawRect(25+i*50,25+j*50,75+i*50,75+j*50,paint);
                }
            }
        }
        super.onDraw(canvas);
    }
}


@Override
public void disappearFullSolidRows() {
    //...........
}

@Override
public boolean setShape(int generatedShape) {
    sh = generatedShape;
    switch (generatedShape) {
        //.......
}

public boolean naturalFallingDown(){
//.....
}

public void moveLeft(){
//.....
}

код детали. Я хочу перейти из ParcelGamesField в GameSurface. (сейчас я только копирую.)

как заставить его работать вместе: mainactivity, activity_main.xml (с кнопкой в ​​игре), игровой интерфейс, gamethread и parcelgamesfield или без (удалить) ParcelGamesField?

вот GameSurface:

package com.tetris.classictetris;
public class GameSurface extends SurfaceView implements SurfaceHolder.Callback  {


private Rect mRectField;
private Rect mRectSquare;
private Paint mPaint;
private Paint mPaintErase;

int a,b;
int[] gamesField;
int sh;
int state;




private GameThread gameThread;

public GameSurface(Context context)  {
    super(context);

    // Make Game Surface focusable so it can handle events.
    this.setFocusable(true);

    // Sét callback.
    this.getHolder().addCallback(this);

    a = 10;
    b = 20;
    gamesField = new int[a*b];

}

class Field extends View {
private Rect mRectField;
private Rect mRectSquare;
private Paint mPaint;
private Paint mPaintErase;

public Field(Context context, AttributeSet attrs) {
    super(context, attrs);

    mRectField = new Rect();
    mRectSquare = new Rect();
    mPaint = new Paint();
    mPaintErase = new Paint();
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setColor(0x80000000);
    mPaintErase.setStyle(Paint.Style.STROKE);
    mPaintErase.setColor(0x80FFFFFF);
}

@Override
protected void onDraw(Canvas canvas) {

    Rect rf = mRectField;
    Rect rs = mRectSquare;
    Paint paint = mPaint;
    Paint paintErase = mPaintErase;

    canvas.drawRect(0,0,501,1001,paint);
    for (int j=0; j < b; j++){
        for (int i=0; i < a; i++){
            if ( gamesField[i+a*j] == 1 ) {
                canvas.drawRect(25+i*50,25+j*50,75+i*50,75+j*50,paint);
            }
        }
    }
    super.onDraw(canvas);
}



@Override
public void disappearFullSolidRows() {
    //...........
}

@Override
public boolean setShape(int generatedShape) {
    sh = generatedShape;
    switch (generatedShape) {
        //.......
}

public boolean naturalFallingDown(){
//.....
}

public void moveLeft(){
//.....
}

Вот GameThread:

package com.tetris.classictetris;


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

public class GameThread extends Thread {

private boolean running;
private GameSurface gameSurface;
private SurfaceHolder surfaceHolder;

public GameThread(GameSurface gameSurface, SurfaceHolder surfaceHolder)  {
    this.gameSurface = gameSurface;
    this.surfaceHolder = surfaceHolder;
}

@Override
public void run()  {
    long startTime = System.nanoTime();

    while(running)  {
        Canvas canvas = null;
        try {
            // Get Canvas from Holder and lock it.
            canvas = this.surfaceHolder.lockCanvas();

            // Synchronized
            synchronized (canvas)  {
                this.gameSurface.update();
                this.gameSurface.draw(canvas);
            }
        }catch(Exception e)  {
            // Do nothing.
        } finally {
            if(canvas!= null)  {
                // Unlock Canvas.
                this.surfaceHolder.unlockCanvasAndPost(canvas);
            }
        }
        long now = System.nanoTime() ;
        // Interval to redraw game
        // (Change nanoseconds to milliseconds)
        long waitTime = (now - startTime)/1000000;
        if(waitTime < 10)  {
            waitTime= 10; // Millisecond.
        }
        System.out.print(" Wait Time="+ waitTime);

        try {
            // Sleep.
            this.sleep(waitTime);
        } catch(InterruptedException e)  {

        }
        startTime = System.nanoTime();
        System.out.print(".");
    }
}

public void setRunning(boolean running)  {
    this.running = running;
}
}