大叔的程序员之路

摘要： 1,computer management 中可查看系统服务，其中可以看到mysql服务。可设置启动方式为auto或者manual.(安装时的默认商品号为3306)2,打开安装文件夹下bin，输入···mysql -u root -p 回车后再输入密码fdsa （或进入mysql 的commend line client直接输入密码fdsa）。 或者直接进入安装时留下的mysql 的commend line client程序。3,当显示mysql>的时候表示已经开启数据库。每一个语句后边跟上；号。如果打错了一直回车，检查下是否有配对的符号如‘号。使用完用ex 阅读全文

摘要： import java.text.DecimalFormat; import java.text.NumberFormat; import java.text.SimpleDateFormat; import java.util.Calendar; public class MyEclipseGen { public static final void main(String[] args){ String id="juny"; String num="999"; System.out.println(getSerial(id,"100&quo 阅读全文

摘要： 传递方：//点击btn_sub传递fieldHeight.getText()和fieldWeight.getText()private void setListeners() { btn_sub.setOnClickListener(calrBMI); } private OnClickListener calrBMI = new OnClickListener() { public void onClick(View v) { Intent intent = new Intent(); Bundle bundle = new Bundle(); bundle.putString(" 阅读全文

摘要： 本帖最后由 cj6585256 于 2013-6-20 13:31 编辑protected static boolean isTopActivity(Activity activity){ String packageName = "xxxxx"; ActivityManager activityManager = (ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE); ListtasksInfo = activityManager.getRunningTasks(1); if(tasks 阅读全文

摘要： Lockjava.util.concurrent.locks.LockKnown Indirect SubclassesReentrantLock,ReentrantReadWriteLock.ReadLock,ReentrantReadWriteLock.WriteLockClass OverviewLockimplementations provide more extensive locking operations than can be obtained usingsynchronizedmethods and statements. They allow more flexible 阅读全文

摘要： 好久没用sqLite又忘了,今天搞了一下SQLiteDatabase是安卓里的数据库类,实际使用时几乎都是用SQLiteDatabaseHelp类,写一个其子类, override onCreate和onUpdate 两个方法即可. 首次运行软件执行onCreate , versionCode更新时调用onUpdate方法.然后使用helper.getWritableDatabase和getReadableDatabase两个方法 阅读全文

摘要： java has deprecate many function as "stop","destroy"等, here is an article written by sun.explains why deprecate and how to do to control thread, 看了比较受用http://docs.oracle.com/javase/1.5.0/docs/guide/misc/threadPrimitiveDeprecation.html 阅读全文

摘要： 有三种方式,EntrySet----forEach----keySet前2种比较后,keyset实际要遍历2轮.******EntrySet********Iterator it = tempMap.entrySet().iterator(); while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); Object key = entry.getKey(); Object value = entry.getValue(); System.out.println("key=" + key + " 阅读全文

摘要： 1,图片缓存用一个LinkedHashmap> , 再存到本地. 需要时先判断map中有没有, 没有找本地文件, 再没有重新下载.2,当getView中异步加载图片的时候, convert不需要重用, 转而用set来保存生成的view3,getview方法内不要做获取数据的处理, getView就是用来get view的4,客户端不管如何优化,如果返回的都是大图片的话,仍然会OOM. 有些时候需要客户端增加字段,判断该字段还返回不同大小的图片.private String getBitmapName(String imageUrl){ String[] str = imageUr... 阅读全文

摘要： The monkeyrunner tool provides an API for writing programs that control an Android device or emulator from outside of Android code. With monkeyrunner, you can write a Python program that installs an Android application or test package, runs it, sends keystrokes to it, takes screenshots of its user i 阅读全文