安卓 OpenGL ES 2 : How to use an OpenGL activity as a fragment in the main activity

Question

我对 Android 和 OpenGL ES 还很陌生。我必须在 OpenGL 中创建一个 GUI，我想将它用作主要 Activity 中的 Fragment。为了学习如何做到这一点，我尝试了 2 个教程 - this Fragment tutorial和 the Android developer tutorial on OpenGL ES .

但我仍然不明白如何在 Fragment 中包含一个 OpenGL View 。 OpenGL 不使用 XML 布局文件，所以这个过程让我很困惑。我想做这样的事情:在 Fragment 教程的主要 Activity 中，我想用 OpenGL 包含第三个 Fragment。对我放轻松，我是初学者 :)

Answer 1

如果开发人员教程可以作为引用，那么以下设置将起作用:

Activity :

public class MainActivity extends FragmentActivity
{
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        getSupportFragmentManager().addOnBackStackChangedListener(new OnBackStackChangedListener()
        {
            public void onBackStackChanged()
            {
                int backCount = getSupportFragmentManager().getBackStackEntryCount();
                if (backCount == 0)
                {
                    finish();
                }
            }
        });

        if (savedInstanceState == null)
        {
            getSupportFragmentManager().beginTransaction().add(R.id.main_container, new OpenGLFragment()).addToBackStack(null).commit();
        }
    }
}

Activity XML (activity_main.xml):

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

fragment :

public class OpenGLFragment extends Fragment
{ 
    private GLSurfaceView mGLView;

    public OpenGLFragment()
    {
        super();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        mGLView = new MyGLSurfaceView(this.getActivity()); //I believe you may also use getActivity().getApplicationContext();
        return mGLView;
    }
}

而且我想您需要按照教程所述制作自己的 GLSurfaceView:

class MyGLSurfaceView extends GLSurfaceView {

    public MyGLSurfaceView(Context context){
        super(context);
        setEGLContextClientVersion(2);    
        // Set the Renderer for drawing on the GLSurfaceView
        setRenderer(new MyRenderer());

    }
}

正如教程所说，制作你的渲染器:

public class MyGLRenderer implements GLSurfaceView.Renderer {

    public void onSurfaceCreated(GL10 unused, EGLConfig config) {
        // Set the background frame color
        GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    }

    public void onDrawFrame(GL10 unused) {
        // Redraw background color
        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    }

    public void onSurfaceChanged(GL10 unused, int width, int height) {
        GLES20.glViewport(0, 0, width, height);
    }
}