以编程方式设置Android的日期/时间

Question

我需要以编程方式从Android设置日期/时间,但我没有成功!我有以上这三个来源:

源代码1

AlarmManager alarm = (AlarmManager) getSystemService(ALARM_SERVICE);  
alarm.setTime(1330082817000); 

AndroidManifest:

<uses-permission android:name="android.permission.SET_TIME" />  
<uses-permission android:name="android.permission.SET_TIME_ZONE" />  

例外:

Service fatal error : Unable to start activity ComponentInfo{br.com.tdta.service/br.com.tdta.service.Service}: java.lang.SecurityException: setTime: Neither user 10038 nor current process has android.permission.SET_TIME.  
java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.tdta.service/br.com.tdta.service.Service}: java.lang.SecurityException: setTime: Neither user 10038 nor current process has android.permission.SET_TIME.  
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)  
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)  
    at android.app.ActivityThread.access$2300(ActivityThread.java:125)  
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)  
    at android.os.Handler.dispatchMessage(Handler.java:99)  
    at android.os.Looper.loop(Looper.java:123)  
    at android.app.ActivityThread.main(ActivityThread.java:4627)  
    at java.lang.reflect.Method.invokeNative(Native Method)  
    at java.lang.reflect.Method.invoke(Method.java:521)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)  
    at dalvik.system.NativeStart.main(Native Method)  
Caused by: java.lang.SecurityException: setTime: Neither user 10038 nor current process has android.permission.SET_TIME.  
    at android.os.Parcel.readException(Parcel.java:1247)  
    at android.os.Parcel.readException(Parcel.java:1235)  
    at android.app.IAlarmManager$Stub$Proxy.setTime(IAlarmManager.java:237)  
    at android.app.AlarmManager.setTime(AlarmManager.java:289)  
    at br.com.tdta.service.Service.onCreate(Service.java:32)  
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)  
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)  
... 11 more  

====

源代码2

boolean itsWork = SystemClock.setCurrentTimeMillis(1330082817000);  
System.out.println(itsWork);  

表现:

<uses-permission android:name="android.permission.SET_TIME" />  
<uses-permission android:name="android.permission.SET_TIME_ZONE" />  

其工作价值:

false  

====

源代码3

SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd.hhmmss");
String data = format.format(new Date(1330082817000));
try {
    Runtime.getRuntime().exec("date -s " + data);
} catch (IOException e) {
}

我究竟做错了什么？

提前致谢!

Answer 1

用户应用程序无权更改设备时间.请通过以下帖子中的cashbash阅读答案,以获取备用选项.

复制到此处以供快速参考:

根据这个帖子,无论我们提供什么权限,用户应用程序都无法设置时间.相反,最好的方法是让用户手动设置时间.我们将使用:

startActivity(new Intent(android.provider.Settings.ACTION_DATE_SETTINGS));

不幸的是,没有办法将它们直接链接到时间设置(这将节省他们一次点击).通过利用ellapsedRealtime,我们可以确保用户正确设置时间.