java - 无法在 GLSurfaceView 上获取 android 触摸事件

Question

系统没有在我的应用程序中调用 onTouchEvent。我已经尝试在 Activity 、 View 和渲染器中使用 onTouchEvent 实现它。他们都没有被叫到。所以我在 Activity 和 View 上尝试了 dispatchTouchEvent，但仍然没有被调用。它基于我编译的 San Angeles NDK 示例，可以正确检测触摸。

下面是完整的java源代码，其他一切都是原生的c++。

---

package com.example.SanAngeles;
    import javax.microedition.khronos.egl.EGLConfig;
    import javax.microedition.khronos.opengles.GL10;

    import android.app.Activity;
    import android.content.Context;
    import android.opengl.GLSurfaceView;
    import android.os.Bundle;
    import android.view.MotionEvent;

    public class DemoActivity extends Activity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            mGLView = new DemoGLSurfaceView(this);
            setContentView(mGLView);
        }

        @Override
        protected void onPause() {
            super.onPause();
            mGLView.onPause();
        }

        @Override
        protected void onResume() {
            super.onResume();
            mGLView.onResume();
        }

        private DemoGLSurfaceView mGLView;

        static {
            System.loadLibrary("Android");
        }
    }

    class DemoGLSurfaceView extends GLSurfaceView {
        public DemoGLSurfaceView(Context context) {
            super(context);
            mRenderer = new DemoRenderer();
            mRenderer.context = context;
            setRenderer(mRenderer);
        }
        @Override
        public boolean onTouchEvent(final MotionEvent event) {
            System.out.println("onTouchEvent");
            System.out.println("Motion Event" + event.getAction());
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                System.out.println("ACTION DOWN");
                final int pointerCount = event.getPointerCount();
                System.out.println("down pcount:" + pointerCount);
                for(int i = 0; i < pointerCount; i++)
                {
                    System.out.println("Touch x:" + event.getX(i) + "y:" + event.getY(i));
                    int id = event.getPointerId(i);
                    nativeTouchDown(id, (int)event.getX(i), (int)event.getY(i));
                }
            }
            if (event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL) {
                final int pointerCount = event.getPointerCount();
            System.out.println("up pcount:" + pointerCount);

                for(int i = 0; i < pointerCount; i++)
                {
                    int id = event.getPointerId(i);
                    nativeTouchUp(id);
                }
            }
            if (event.getAction() == MotionEvent.ACTION_MOVE) {
                final int pointerCount = event.getPointerCount();
            System.out.println("move pcount:" + pointerCount);

                for(int i = 0; i < pointerCount; i++)
                {
                    int id = event.getPointerId(i);
                    nativeTouchMove(id, (int)event.getX(i), (int)event.getY(i));
                }
            }
            return true;
        }

        DemoRenderer mRenderer;

        private static native void nativePause();
    }

    class DemoRenderer implements GLSurfaceView.Renderer {
        Context context;
        Object am;
        public void onSurfaceCreated(GL10 gl, EGLConfig config) {

            am = (Object)context.getAssets();
            System.out.println("HDROP:\n AssetManager:" + am);
            nativeInit(am, 500,500);
        }

        public void onSurfaceChanged(GL10 gl, int w, int h) {
            //gl.glViewport(0, 0, w, h);
            System.out.println("Hdrop  surface changed");
            nativeResize(w, h);
        }

        public void onDrawFrame(GL10 gl) {
            nativeRender();
        }

        private static native void nativeInit(Object assetManager, int w, int h);
        private static native void nativeTouchDown(int id, int x, int y);
        private static native void nativeTouchUp(int id);
        private static native void nativeTouchMove(int id, int x, int y);
        private static native void nativeResize(int w, int h);
        private static native void nativeRender();
        private static native void nativeDone();
    }

Answer 1

onTouch 可以在您想要的任何地方工作(即，如果它是 Activity 或 View )，只要您已声明接口(interface)并将监听器设置正确!另一方面，onTouchEvent 仅在 View 内工作

换句话说，onTouch() 被 View 的用户使用 来获取触摸事件，而 onTouchEvent() 被 View 的派生类使用获取触摸事件

尝试用 onTouch 替换 onTouchEvent..

希望对你有帮助