来源: 互联网  发布时间: 2014-02-18

这里对IP4都很淡定阿
ip4都发售这么久了,相信这边拿到机器的同学也不在少数,貌似开箱文一个都没有,针对ip4新OS开发和API的讨论也好像寥寥无几. 纳闷了,是因为ip4太好玩还没玩转过来, 还是相对于ip3,从开发者角度来看几乎毫无新意?

话说回来,今年android倒是新机频频,从年初Goole原生的Nexus One(G5)到最近火热的三星I90000和HTC Desire(G7),再加上即将到来的android 2.2, 呵呵, 只能说Apple淡定得可以阿

    

    来源: 互联网  发布时间: 2014-02-18

采用Timer+TimerTask+Handler+LocationManager这种定时的间隔定位

采用Timer+TimerTask+Handler+LocationManager这种定时的间隔定位时，在TimerTask中用handler发sendMessage,然后在Handler的handleMessage里面处理message并进行定位。这种方式是完全合理且正确的，
因为我也查了查，有人是这样说的：

Ok took me a while but I have found the solution to this,as the documentation says you can only request location updates from the location manager from a looper thread, that means that when the timer task is called you have to obtain a message and send the message to a handler and the handler would be responsible for requesting location updates.
来自于http://www.questionhub.com/StackOverflow/3589963

 
于是，我又查了查官方文档中Reference对LocationManager的方法requestLocationUpdates (String provider, long minTime, float minDistance, LocationListener listener) 的解释，有这么一句话，如下：

The calling thread must be a Looper thread such as the main thread of the calling Activity.

所以，正好在Activity里面创建一个Handler时，就满足了上面的要求，创建一个没有形参的Handler时，文档中是这么解释的，如下：

Default constructor associates this handler with the queue for the current thread.

综上所述，这些是我能解释和查到的。

    

    来源: 互联网  发布时间: 2014-02-18

得到id的方法

int id = getResources().getIdentifier("cell00", "id", getPackageName());
TextView currcell = (TextView) findViewById(id); 

Class clazz = R.id.class;
Field f = clazz.getField("cell" + "00");
int id = f.getInt(null);  // pass in null, since field is a static field.
TextView currcell = (TextView) findViewById(id);