新建android opengl工程
新建android opengl工程
通过eclipse新建一个空的工程。然后使用GLSurfaceView来支持opengl
package com.cloudgame.org;
import android.app.Activity;
import android.os.Bundle;
import android.opengl.GLSurfaceView;
import android.opengl.GLSurfaceView.Renderer;
public class GameActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
Renderer render = new GameRenderer();//要实现的 Renderer
GLSurfaceView glView = new GLSurfaceView(this);
glView.setEGLConfigChooser(8 , 8, 8, 8, 16, 0);
glView.setEGLContextClientVersion(2);
glView.setRenderer(render);
setContentView(glView);
helloLog("hello");
}
private native void helloLog(String logThis);
static {
System.loadLibrary("cloudGameEngine");
}
}render 里面只是清空屏幕
package com.cloudgame.org;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import android.opengl.GLES20;
import android.opengl.GLSurfaceView.Renderer;
public class GameRenderer implements Renderer {
@Override
public void onDrawFrame(GL10 arg0) {
// TODO Auto-generated method stub
GLES20.glClearColor(1, 0, 0, 0);
// 清除屏幕和深度缓存
GLES20.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
}
@Override
public void onSurfaceChanged(GL10 arg0, int arg1, int arg2) {
// TODO Auto-generated method stub
GLES20.glViewport(0, 0, arg1, arg2);
}
@Override
public void onSurfaceCreated(GL10 arg0, EGLConfig arg1) {
// TODO Auto-generated method stub
}
}为了让它全屏显示，还要在AndroidManifest.xml里面加这么一句。
这里有要注意一下：在模拟器调试时要设置 glView.setEGLConfigChooser(8 , 8, 8, 8, 16, 0); 不然会crash。这个是gl模式，真机上会自动适配。所以不调用这句，真机运行没问题，但模拟器会crash掉。
引擎的主要部分，用c++来做比较好。所以这里涉及到android ndk开发，java调用c++。
eclipse当前工程右键->android tools->Native support.然后写cpp
#include <jni.h>
#include <android/log.h>
extern "C" void Java_com_cloudgame_org_GameActivity_helloLog(JNIEnv *env, jobject thiz,jstring logThis) {
const char *nativeString = env->GetStringUTFChars(logThis, JNI_FALSE);
// use your string
__android_log_print(ANDROID_LOG_INFO, "MYPROG", "x = %s ", nativeString);
env->ReleaseStringUTFChars(logThis, nativeString);
}
还要配置一下android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := cloudGameEngine LOCAL_SRC_FILES := cloudGameEngine.cpp LOCAL_LDLIBS := -llog include $(BUILD_SHARED_LIBRARY)
jni函数的命名规范。Java_包名_调用的类名_函数名。
GameActivity中声明并调用helloLog。
最后说下打包。
打包可以直接eclipse来打包，也可以通过命名来完成。
1、ndk-build -j%d NDK_DEBUG=1 ndk 打so库命令 -j的参数是cpu个数
2、android update project -t %s -n %s -p %s -s android 更新工程命令
3、ant debug ant 打包命令
我写了一个python来自动打包
import sys
import os, os.path
import shutil
def get_num_of_cpu():
''' The build process can be accelerated by running multiple concurrent job processes using the -j-option.
'''
try:
platform = sys.platform
if platform == 'win32':
if 'NUMBER_OF_PROCESSORS' in os.environ:
return int(os.environ['NUMBER_OF_PROCESSORS'])
else:
return 1
else:
from numpy.distutils import cpuinfo
return cpuinfo.cpu._getNCPUs()
except Exception:
print "Can't know cpuinfo, use default 1 cpu"
return 1
# -------------- main --------------
if __name__ == '__main__':
app_name = "cloudGame"
android_platform = "android-19"
current_dir = os.path.dirname(os.path.realpath(__file__))
app_android_root = current_dir
num_of_cpu = get_num_of_cpu()
ndk_root = os.environ['NDK_ROOT']
command = '%s/ndk-build -j%d NDK_DEBUG=1' % (ndk_root,num_of_cpu)
if os.system(command) != 0:
raise Exception("ndk-build fails!")
sdk_root = os.environ['ANDROID_SDK_ROOT']
sdk_tool_path = os.path.join(sdk_root, "tools/android")
command = '%s update project -t %s -n %s -p %s -s' % (sdk_tool_path,android_platform,app_name,app_android_root)
if os.system(command) != 0:
raise Exception("update project [ " + app_android_root + " ] fails!")
command = 'ant debug'
if os.system(command) != 0:
raise Exception("ant debug fails!")