Detection of key-pressing at boot-time.

< ?xml version="1.0" encoding="utf-8"?>
< manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.sgtmeow.boot.service"
      android:versionCode="1"
      android:versionName="1.0">
      < uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    < application android:icon="@drawable/icon" android:label="@string/app_name">
       < service android:name=".BootService">
       < intent-filter>
       < action
       android:name = "com.sgtmeow.boot.service.BootService">
       < /action>
       < /intent-filter>
       < /service>
       < receiver android:name=".BootReceiver">
       < intent-filter>
       < action
       android:name ="android.intent.action.BOOT_COMPLETED">
       < /action>
       < /intent-filter>
       < /receiver>
    < /application>
    < uses-sdk android:minSdkVersion="8"
       android:targetSdkVersion="17"android:targetSdkVersion="17" />
< /manifest>

package com.sgtmeow.boot.service;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class BootDemoReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(final Context context, final Intent bootintent) {
  Intent mServiceIntent = new Intent();
mServiceIntent.setAction("com.sgtmeow.boot.service.BootService");
  context.startService(mServiceIntent);
 }
}

package com.sgtmeow.boot.service;

import java.io.DataOutputStream;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
import android.view.KeyEvent;

import com.sgtmeow.boot.service.BootReceiver;

public class BootService extends Service {

	Runtime mRuntime;
	Process mProcess = null;
	DataOutputStream mOutput = null;

	@Override
	public IBinder onBind(final Intent intent) {
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();

	}

	public boolean onKeyDown(int keyCode, KeyEvent event) {
		super.onKeyDown(keyCode, event);

		if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
			mountSystem();
			Log.w("SGT.MEOW", "Volume Up has been pressed");
			return true;
		}
		return true;
	}

	public void onStartCommand(final Intent intent, final int startId) {
		super.onStartCommand(intent, startId, startId);

		mountSystem();
	}

	private void mountSystem() {

		Runtime.getRuntime();

		// The service is now started, ask for root and mount /system using
		// busybox (or not)
		try {
			mProcess = mRuntime.exec("su");
			mOutput = new DataOutputStream(mProcess.getOutputStream());
			mOutput.writeBytes("busybox mount -o remount,rw /system");
			mOutput.flush();
			stopService(new Intent(BootService.this, BootReceiver.class));

		} catch (Exception e) {
			Log.e("SGT.MEOW", "An Error Has Occured", e);
			e.printStackTrace();
		}

	}
}