pcwiki的部落格

http://blog.csdn.net/geekwangminli/article/details/8007114

最近公司让做一个地图定位系统，需要将山东省大中城市的经纬度写入到sqlite中，手工逐个写入很不现实，最好的方法是将网上的资料导入到sqlite中，我先将网上下载的资源保存成excel表格，再导入sqlite中，这时发现导入的中文数据都是乱码，原来是由于两个工具之间的编码不同造成的，几经周折，问题终于解决，先列出该步骤，以飨网友。

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10月 11 週六 201403:34
[轉] Java Collections copy list

http://stackoverflow.com/questions/689370/java-collections-copy-list-i-dont-understand
若想要複製 collections
那要用下列方法:
List<String> b =newArrayList<String>(a);

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10月 11 週六 201403:32
[轉] Java - String.getBytes()的中文編碼問題亂碼中文

http://uki-kemono.blogspot.tw/2009/07/java-stringgetbytes.html

因為放到server上一直出現亂碼，但又不是db和網頁的問題，找了一下是程式中關於getByte()的問題。

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9月 17 週三 201418:01
[轉] android 螢幕亮度開關 on off 調整之二

一：只改变当前程序android屏幕亮度
（1）方法：
lp.screenBrightness 取值 0.0 -- 1.0 ※设定值（float）的范围，默认小于 0（系统设定）、0.0（暗）～1.0（亮） ※调用处理的地方，例如， Activity.onCreate()等等

代码：
WindowManager.LayoutParams lp = getWindow().getAttributes();

lp.screenBrightness = 1.0f;

getWindow().setAttributes(lp);

注：1、b是一个浮点数从0~1 ，表示亮度

2、当我们遇到把Activity做为子Activity潜入到TabActivity 或者 ViewGroup 类容器时，通常上面的方法设置无法取得成功。

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9月 17 週三 201417:57
[轉] Android锁屏API-DevicePolicyManager介绍鎖屏鎖螢幕

从Android 2.2开始，加入了一个新的锁屏API位于android.app.admin.DevicePolicyManager包，DevicePolicyManager类的lockNow方法可以锁住屏幕，查看Android源代码发现其实是从IDevicePolicyManager实现的，整个AIDL接口调用代码为:

private final IDevicePolicyManager mService;

mService = IDevicePolicyManager.Stub.asInterface(

ServiceManager.getService(Context.DEVICE_POLICY_SERVICE));

if (mService != null) {

try {

mService.lockNow();

} catch (RemoteException e) {

Log.w(TAG, "Failed talking with device policy service", e);

}

}

复制代码

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9月 17 週三 201417:54
[轉] android 螢幕亮度開關 on off 調整之一

http://stackoverflow.com/questions/9561320/android-how-to-turn-screen-on-and-off-programmatically

Before marking this post as a "duplicate", I am writing this post because no other post holds the solution to the problem.

I am trying to turn off the device, then after a few minutes or sensor change, turn it back on.

Turn Off Display Tests

I am able to turn off the screen using:

params.flags |=LayoutParams.FLAG_KEEP_SCREEN_ON;params.screenBrightness =0;
 getWindow().setAttributes(params);

I have been unable to turn off the screen using the wl.release() method.

Turn On Display Test

My first guess, as follows, does not work. Nothing happens, screen remains off.

params.flags |=LayoutParams.FLAG_KEEP_SCREEN_ON;params.screenBrightness =-1f;
 getWindow().setAttributes(params);

I also then tried to use wakelocks, with no success.

PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK,"tag");
 wl.acquire();

Finally I have tried the following, with no result.

getWindow().addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);

All in all, I don't get any kind of error in the console for any of these methods. My test text "Screen should be on", is on the the screen when I turn on the device using the power button. This shows that the code should have ran. Please only answer if you have tested the code, it seems like many of the functions such as params.screenBrightness = -1, do not work as they should according to the sdk.

Thanks!