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 
        
         #include 
         
          #include 
          
           #include 
           
            #include 
            
             #include 
             
              #include 
              
                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    := ledsLOCAL_SRC_FILES := leds.cinclude $(BUILD_SHARED_LIBRARY)