LibGDX And​​roid上的崩溃实施一些彩车

Question

所以我LibGDX项目工程完全罚款在桌面上，并在Android太后，但是当我实现它测量球员得分的浮动，游戏会崩溃在Android上。这个想法是，每次屏幕向上滚动时，分数都会降低，当它向下滚动时，分数会增加。我正在使用gesturedetector控制器进行滚动。 下面是主要代码：

public class WorldScreen implements Screen{ 

    private Texture bgCity; 
    private Texture bgLoop; 
    private Texture hud; 

    public static OrthographicCamera camera; 
    SpriteBatch batch; 

    Rectangle player; 
    Rectangle background; 
    Rectangle backgroundloop; 

    public float camx = 0; 
    public float camy = 0; 

    public static float score = 384400000; 

    GestureListenerC controller; 

    public WorldScreen(final JetpackGame aa) { 

    } 

    @Override 
    public void render(float delta) { 
     Gdx.gl.glClearColor(0, 0, 0, 1); 
     Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); 

     camx = camera.viewportWidth/2f; 
     camy = camera.viewportHeight/2f; 

     controller.update(); 
     camera.update(); 

     batch.setProjectionMatrix(camera.combined); 
     batch.begin(); 
     batch.draw(bgCity, background.x, background.y); 
     if(background.y <= -3296){ 
      if(backgroundloop.y <= -800) backgroundloop.y = 0; 
     } 

     if(camy >= 100) batch.draw(bgLoop, backgroundloop.x, backgroundloop.y); 
     if(camera.position.y >= 5360) camera.position.y = 4420; 

     batch.end();   



    } 
    @Override 
    public void resize(int width, int height) { 

    } 

    @Override 
    public void show() { 
     controller = new GestureListenerC(); 
     GestureDetector gestureDetector = new GestureDetector(20, 0.5f, 2, 0.15f, controller); 
     Gdx.input.setInputProcessor(gestureDetector); 

     bgCity = new Texture(Gdx.files.internal("img/city_BG.png")); 
     bgLoop = new Texture(Gdx.files.internal("img/loopBG.png")); 
     hud = new Texture(Gdx.files.internal("img/hud.png")); 

     camera = new OrthographicCamera(); 
     camera.setToOrtho(false, 420,800); 
     batch = new SpriteBatch(); 

     player = new Rectangle(); 
     player.x = 420/2; 
     player.y = 800/2; 

     background = new Rectangle(); 
     background.x = 0; 
     background.y = 0; 
     background.width = 479; 
     background.height = 4096; 

     backgroundloop = new Rectangle(); 
     backgroundloop.x = 0; 
     backgroundloop.y = 4096; 
     backgroundloop.width = 512; 
     backgroundloop.height = 1024; 

    } 

    @Override 
    public void hide() { 

    } 

    @Override 
    public void pause() { 

    } 

    @Override 
    public void resume() { 

    } 

    @Override 
    public void dispose() { 
     batch.dispose(); 
     bgCity.dispose(); 
     bgLoop.dispose(); 
     hud.dispose(); 
    } 

    } 

And here is the controller class: 

    public class GestureListenerC implements GestureListener{ 

    public static float velX, velY; 
    public static boolean flinging = false; 
    float initialScale = 1; 

    public boolean touchDown (float x, float y, int pointer, int button) { 
     flinging = false; 
     return false; 
    } 

    @Override 
    public boolean tap (float x, float y, int count, int button) { 
     return false; 
    } 

    @Override 
    public boolean longPress (float x, float y) { 
     return false; 
    } 

    @Override 
    public boolean fling (float velocityX, float velocityY, int button) { 
     flinging = true; 
     velX = WorldScreen.camera.zoom * velocityX * 0.5f; 
     velY = WorldScreen.camera.zoom * velocityY * 0.5f; 
     return false; 
    } 

    @Override 
    public boolean pan (float x, float y, float deltaX, float deltaY) { 
     WorldScreen.camera.position.y += deltaY; 
     WorldScreen.score -= deltaY; 
     return false; 
    } 

    @Override 
    public boolean panStop (float x, float y, int pointer, int button) { 
     return false; 
    } 

    @Override 
    public boolean zoom (float originalDistance, float currentDistance) { 
     return false; 
    } 

    @Override 
    public boolean pinch (Vector2 initialFirstPointer, Vector2 initialSecondPointer, Vector2 firstPointer, Vector2 secondPointer) { 
     return false; 
    } 

    public void update() { 
     if (flinging) { 
      velY *= 0.98f; 
      WorldScreen.score -= 0.2f * velY; 
      WorldScreen.camera.position.add(0, velY * Gdx.graphics.getDeltaTime(), 0); 
      if (Math.abs(velY) < 0.01f) velY = 0; 
     } 
    } 
} 

这是一个模拟器运行它后什么logcat的说：（我不喜欢使用它，因为它经常死机由于模拟器图形问题）

01-21 10:01:37.982: W/dalvikvm(274): threadid=1: thread exiting with uncaught  exception (group=0x4001d800) 
01-21 10:01:38.002: E/AndroidRuntime(274): FATAL EXCEPTION: main 
01-21 10:01:38.002: E/AndroidRuntime(274): java.lang.RuntimeException: Unable to start activityy ComponentInfo{com.vahlaville.game.android/com.vahlaville.game.android.AndroidLauncher}: com.badlogic.gdx.utils.GdxRuntimeException: Libgdx requires OpenGL ES 2.0 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.os.Looper.loop(Looper.java:123) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.app.ActivityThread.main(ActivityThread.java:4627) 
01-21 10:01:38.002: E/AndroidRuntime(274): at java.lang.reflect.Method.invokeNative(Native Method) 
01-21 10:01:38.002: E/AndroidRuntime(274): at java.lang.reflect.Method.invoke(Method.java:521) 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
01-21 10:01:38.002: E/AndroidRuntime(274): at dalvik.system.NativeStart.main(Native Method) 
01-21 10:01:38.002: E/AndroidRuntime(274): Caused by: com.badlogic.gdx.utils.GdxRuntimeException: Libgdx requires OpenGL ES 2.0 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.badlogic.gdx.backends.android.AndroidGraphics.createGLSurfaceView(AndroidGraphics.java:122) 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.badlogic.gdx.backends.android.AndroidGraphics.<init>(AndroidGraphics.java:102) 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.badlogic.gdx.backends.android.AndroidGraphics.<init>(AndroidGraphics.java:95) 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.badlogic.gdx.backends.android.AndroidApplication.init(AndroidApplication.java:133) 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.badlogic.gdx.backends.android.AndroidApplication.initialize(AndroidApplication.java:99) 
01-21 10:01:38.002: E/AndroidRuntime(274): at com.vahlaville.game.android.AndroidLauncher.onCreate(AndroidLauncher.java:18) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
01-21 10:01:38.002: E/AndroidRuntime(274): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
01-21 10:01:38.002: E/AndroidRuntime(274): ... 11 more 

Answer 1

GdxRuntimeException：Libgdx需要OpenGL ES 2.0

请确保您有这个在`AndroidManifest.xml中：

<uses-feature android:glEsVersion="0x00020000" android:required="true" /> 

如果你这样做，那么就意味着您的设备不具备OpenGL ES的V2，这是需要通过libgdx。