package cn.hyc.led;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.widget.Button;

public class MainActivity extends Activity {

    private Button led1, led2, led3, led4;

    private boolean led1OnOFF = false;

    private boolean led2OnOFF = false;

    private boolean led3OnOFF = false;

    private boolean led4OnOFF = false;

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        led1 = (Button)this.findViewById(R.id.led1);

        led2 = (Button)this.findViewById(R.id.led2);

        led3 = (Button)this.findViewById(R.id.led3);

        led4 = (Button)this.findViewById(R.id.led4);

        led1.setOnClickListener(new OnClickLed());

        led2.setOnClickListener(new OnClickLed());

        led3.setOnClickListener(new OnClickLed());

        led4.setOnClickListener(new OnClickLed());

    }

    public class OnClickLed implements View.OnClickListener{

		public void onClick(View v) {

				switch (v.getId()) {

				case R.id.led1:

							if(led1OnOFF){

								cmdLeds(0, 0);

								led1OnOFF = false;

							}	else{

								cmdLeds(1, 0);

								led1OnOFF = true;

							}

					break;

				case R.id.led2:

							if(led2OnOFF){

								cmdLeds(0, 1);

								led2OnOFF = false;

							}	else{

								cmdLeds(1, 1);

								led2OnOFF = true;

							}

					break;

				case R.id.led3:

							if(led3OnOFF){

								cmdLeds(0, 2);

								led3OnOFF = false;

							}	else{

								cmdLeds(1, 2);

								led3OnOFF = true;

							}

					break;

				case R.id.led4:

						if(led4OnOFF){

							cmdLeds(0, 3);

							led4OnOFF = false;

						}	else{

							cmdLeds(1, 3);

							led4OnOFF = true;

						}

					break;

				default:

					break;

				}

		}

    } 

   public native void cmdLeds(int cmd, int arg);

    static

    {

    		System.loadLibrary("leds");

    }

    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

}

#include <jni.h>

#include <fcntl.h>

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include <stdlib.h>

 void Java_cn_hyc_led_MainActivity_cmdLeds( JNIEnv* env, jobject thiz, jint cmd, jint arg)

{

    int dev;

    dev = open("/dev/leds", O_WRONLY);

    ioctl(dev, cmd, arg);

    close(dev);

}

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := leds

LOCAL_SRC_FILES := leds.c

include $(BUILD_SHARED_LIBRARY)