[Android]NativeActivity：hello world

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");

    }

}

#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.java

class MyJavaClass

{

    public static void main( String []arg)

    {

        System.out.println("Hello World");

    }

}*/

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_LDLIBS := -llog

LOCAL_MODULE    := myNative

LOCAL_SRC_FILES += main.cpp

 LOCAL_LDLIBS    := -llog -landroid -lEGL -lGLESv1_CM 

LOCAL_STATIC_LIBRARIES := android_native_app_glue

include $(BUILD_SHARED_LIBRARY)

$(call import-module,android/native_app_glue)

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.horizon.AndroidHelloWorld"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme"

        android:hasCode="true" >

        <activity

            android:name=".MyMainNativeActivity" 

            android:label="@string/title_activity_main" >

             <meta-data android:name="android.app.lib_name"

                    android:value="myNative" />

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity> 

          <!-- Our activity is the built-in NativeActivity framework class.

             This will take care of integrating with our NDK code. -->

       <!-- <activity android:name="android.app.NativeActivity"

                android:label="@string/app_name"

                android:configChanges="orientation|keyboardHidden">

            <meta-data android:name="android.app.lib_name"

                    android:value="myNative" />

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>-->

    </application>

</manifest>