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@fpersson
Created October 26, 2011 18:13
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lockfile for android
package test.demo;
import java.io.File;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.util.Date;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
/**
* @author fredrik persson
* a quick android version, writing to /mnt/sdcard
*/
public class demo extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i("Demo", "Locking file...");
Date now = new Date();
File file = new File("/mnt/sdcard/myfile");
try{
FileChannel channel = new RandomAccessFile(file, "rw").getChannel();
FileLock lock = channel.lock();
if(!file.exists()){
file.createNewFile();
Log.i("Demo","Createing file");
}else{
Log.i("Demo","modify file");
file.setLastModified(now.getTime());
}
lock.release();
channel.close();
}catch(Exception e){
Log.i("Demo","Err: "+e.getMessage());
}
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.i("Demo","Current unixtime is: "+Long.toString(now.getTime()));
Log.i("Demo","File last modified:" +Long.toString(file.lastModified()));
}
}
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