繼承時把Activity改成NativeActivity，這個類別只適用於Android2.3以及NDKr5以上的版本。
Java:
package com.horizon.AndroidHelloWorld; import com.horizon.AndroidHelloWorld.R; import android.os.Bundle;import android.app.NativeActivity;import android.util.Log;import android.view.Menu; public class MyMainNativeActivity extends NativeActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.d(“MyMainNativeActivity”, “MyMainNativeActivity.onCreate”); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_main, menu); return true; } @Override public void onPause(){ super.onPause(); Log.d(“MyMainNativeActivity”, “MyMainNativeActivity.onPause”); } @Override public void onResume(){ super.onResume(); Log.d(“MyMainNativeActivity”, “MyMainNativeActivity.onResume”); } }
C++:main.cpp
#include <jni.h>#include <android/log.h>#include <android_native_app_glue.h> /** * This is the main entry point of a native application that is using * android_native_app_glue. It runs in its own thread, with its own * event loop for receiving input events and doing other things. /void android_main(struct android_app state) { // Make sure glue isn’t stripped. app_dummy(); __android_log_print(ANDROID_LOG_DEBUG, “C++”, “NDK:LC: [%s]”, “Hello NativeActivity”); while(true){ //do game loop //__android_log_print(ANDROID_LOG_DEBUG, “C++”, “NDK:LC: [%s]”, “Game Loop”); }} /*#include <stdio.h>#include <stdlib.h>#include <jni.h>int main(){ JNIEnv *env; JavaVM jvm; JavaVMInitArgs vm_args; JavaVMOption options[1]; // launch Jvm options[0].optionString = “-Djava.class.path=.”; // add user classes vm_args.version = JNI_VERSION_1_6; //JDK version. vm_args.options = options; vm_args.nOptions = 1; if( JNI_CreateJavaVM(&jvm, (void) &env, &vm_args) < 0 ) { fprintf( stderr , “Launch JVM Error\n” ); exit(1); } // find the obj & method jclass my_class; jmethodID my_main; if( !( my_class = (*env)→FindClass( env, “MyJavaClass”) ) ) { fprintf( stderr , “‘Class’ Not Found\n” ); exit(1); } if( !( my_main = (*env)→GetStaticMethodID( env, my_class , “main” , ”([Ljava/lang/String;)V” ) ) ) fprintf( stderr , “‘main’ Not Found\n” ); else // Call main function (*env)→CallStaticVoidMethod( env, my_class, my_main, NULL); // finish (jvm)→DestroyJavaVM(jvm); return 0;}@ MyJavaClass.javaclass MyJavaClass{ public static void main( String []arg) { System.out.println(“Hello World”); }}/
Android.mk
LOCAL_PATH := (CLEAR_VARS) LOCAL_LDLIBS := -llog LOCAL_MODULE := myNativeLOCAL_SRC_FILES += main.cpp LOCAL_LDLIBS := -llog -landroid -lEGL -lGLESv1_CM LOCAL_STATIC_LIBRARIES := android_native_app_glueinclude (call import-module,android/native_app_glue)
AndroidManifest.xml
先至CYGWIN的project目錄下ndk-build把.so檔建立出來後即可執行。