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私はアンドロイドスタジオで2dゲームを作る方法についてレトロチキンチュートリアルをオンラインでフォローしていましたが、問題を横断して実行しましたが、解決策を見つけるように思われる。彼のコードを実行した2番目のビデオ（https://www.youtube.com/watch?v=Rliwg0sELJo）に問題が発生し、画面上に四角形が表示され、彼は動き回ることができます。私の場合、何らかの理由でキャンバスに四角形が表示されません。私は彼とまったく同じコードを持っています（私は戻ってチェックしました）。キャンバスにキャンバスを描く[Androidスタジオゲーム]
：Cold swapped changes.
$ adb shell am start -n "com.example.ridhavraj.stardrifter/com.example.ridhavraj.stardrifter.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Connected to process 3319 on device emulator-5554
W/System: ClassLoader referenced unknown path: /data/app/com.example.ridhavraj.stardrifter-2/lib/x86
I/InstantRun: Instant Run Runtime started. Android package is com.example.ridhavraj.stardrifter, real application class is null.
W/System: ClassLoader referenced unknown path: /data/app/com.example.ridhavraj.stardrifter-2/lib/x86
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 1
[ 11-11 20:20:52.858 3319: 3343 D/ ]
HostConnection::get() New Host Connection established 0xaee13300, tid 3343
A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 3343 (Thread-5)
[ 11-11 20:20:53.138 1214: 1214 W/ ]
debuggerd: handling request: pid=3319 uid=10072 gid=10072 tid=3343
Application terminated.
ここで私はビデオから作られているコードは次のとおりです。回私のアプリケーションで
は、時には（私は最新のSDKのバージョンとすべてのものを持っている）を起動し、私にこのようなエラーが発生しますがdoesntの
[ゲームオブジェクトインターフェイス]
package com.example.ridhavraj.stardrifter;
import android.graphics.Canvas;
public interface GameObject {
public void draw(Canvas canvas);
public void update();
}
[MainActivityクラス】
package com.example.ridhavraj.stardrifter;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
//setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(new GamePanel(this));
}
}
[MainThreadクラス]
package com.example.ridhavraj.stardrifter;
import android.graphics.Canvas;
import android.provider.Settings;
import android.view.SurfaceHolder;
public class MainThread extends Thread{
public static final int MAX_FPS = 30;
private double averageFPS;
private SurfaceHolder surfaceHolder;
private GamePanel gamePanel;
private boolean running;
public static Canvas canvas;
public void setRunning(boolean running)
{
this.running = running;
}
public MainThread(SurfaceHolder surfaceHolder, GamePanel gamePanel)
{
super();
this.surfaceHolder = surfaceHolder;
this.gamePanel = gamePanel;
}
@Override
public void run()
{
long startTime;
long timeMillis = 1000/MAX_FPS;
long waitTime;
int frameCount = 0;
long totalTime = 0;
long targetTime = 1000/MAX_FPS;
while(running)
{
startTime = System.nanoTime();
canvas = null;
try
{
canvas = this.surfaceHolder.lockCanvas();
synchronized (surfaceHolder)
{
this.gamePanel.update();
this.gamePanel.draw(canvas);
}
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
if (canvas != null)
{
try
{
surfaceHolder.unlockCanvasAndPost(canvas);
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
timeMillis = (System.nanoTime()-startTime)/1000000;
waitTime = targetTime - timeMillis;
try
{
if (waitTime > 0)
{
this.sleep(waitTime);
}
}
catch (Exception e)
{
e.printStackTrace();
}
totalTime += System.nanoTime() - startTime;
frameCount++;
if (frameCount == MAX_FPS)
{
averageFPS = 1000/((totalTime/frameCount)/1000000);
frameCount = 0;
totalTime = 0;
System.out.println(averageFPS);
}
}
}
}
[GamePanelのクラス]
package com.example.ridhavraj.stardrifter;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Point;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class GamePanel extends SurfaceView implements SurfaceHolder.Callback {
private MainThread thread;
private Player player;
private Point playerPoint;
public GamePanel(Context context)
{
super(context);
getHolder().addCallback(this);
thread = new MainThread(getHolder(), this);
player = new Player(new Rect(100,100,200,200), Color.rgb(255,0,0));
playerPoint = new Point(150,150);
setFocusable(true);
}
@Override
public void surfaceChanged(SurfaceHolder Holder, int format, int width, int height)
{
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
thread = new MainThread(getHolder(), this);
thread.setRunning(true);
thread.start();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
boolean retry = true;
while(true)
{
try
{
thread.setRunning(false);
thread.join();
}
catch (Exception e)
{
e.printStackTrace();
}
retry = false;
}
}
public boolean onTouchEvent(MotionEvent event)
{
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
playerPoint.set((int)event.getX(), (int)event.getY());
}
return true;
//return super.onTouchEvent(event);
}
public void update()
{
player.update(playerPoint);
}
@Override
public void draw(Canvas canvas)
{
super.draw(canvas);
canvas.drawColor(Color.WHITE);
player.draw(canvas);
}
}
[プレーヤークラス]
package com.example.ridhavraj.stardrifter;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Canvas;
import android.graphics.Rect;
public class Player implements GameObject{
private Rect rectangle;
private int color;
public Player(Rect rectangle, int Color)
{
this.rectangle = rectangle;
this.color = color;
}
@Override
public void draw(Canvas canvas)
{
Paint paint = new Paint();
paint.setColor(color);
canvas.drawRect(rectangle, paint);
}
@Override
public void update()
{
}
public void update(Point point)
{
//l,t,r,b
rectangle.set(point.x-rectangle.width()/2, point.y-rectangle.height()/2, point.x+rectangle.width()/2, point.y+rectangle.height()/2);
}
}
私は私が間違っているの何の手がかりをいけない、任意のヘルプは次のようになります大いに感謝します。