Android 通过应用程序来设置系统的日期和时间中的
android 2.3
android 4.0
测试可行,刚需ROOT权限.
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.Calendar; import android.os.SystemClock; public class SystemDateTime { static final String TAG = "SystemDateTime"; public static void setDateTime(int year, int month, int day, int hour, int minute) throws IOException, InterruptedException { requestPermission(); Calendar c = Calendar.getInstance(); c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month-1);
c.set(Calendar.DAY_OF_MONTH, day);
c.set(Calendar.HOUR_OF_DAY, hour);
c.set(Calendar.MINUTE, minute); long when = c.getTimeInMillis(); if (when / 1000 < Integer.MAX_VALUE) {
SystemClock.setCurrentTimeMillis(when);
} long now = Calendar.getInstance().getTimeInMillis();
//Log.d(TAG, "set tm="+when + ", now tm="+now); if(now - when > 1000)
throw new IOException("failed to set Date."); } public static void setDate(int year, int month, int day) throws IOException, InterruptedException { requestPermission(); Calendar c = Calendar.getInstance(); c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);
c.set(Calendar.DAY_OF_MONTH, day);
long when = c.getTimeInMillis(); if (when / 1000 < Integer.MAX_VALUE) {
SystemClock.setCurrentTimeMillis(when);
} long now = Calendar.getInstance().getTimeInMillis();
//Log.d(TAG, "set tm="+when + ", now tm="+now); if(now - when > 1000)
throw new IOException("failed to set Date.");
} public static void setTime(int hour, int minute) throws IOException, InterruptedException { requestPermission(); Calendar c = Calendar.getInstance(); c.set(Calendar.HOUR_OF_DAY, hour);
c.set(Calendar.MINUTE, minute);
long when = c.getTimeInMillis(); if (when / 1000 < Integer.MAX_VALUE) {
SystemClock.setCurrentTimeMillis(when);
} long now = Calendar.getInstance().getTimeInMillis();
//Log.d(TAG, "set tm="+when + ", now tm="+now); if(now - when > 1000)
throw new IOException("failed to set Time.");
} static void requestPermission() throws InterruptedException, IOException {
createSuProcess("chmod 666 /dev/alarm").waitFor();
} static Process createSuProcess() throws IOException {
File rootUser = new File("/system/xbin/ru");
if(rootUser.exists()) {
return Runtime.getRuntime().exec(rootUser.getAbsolutePath());
} else {
return Runtime.getRuntime().exec("su");
}
} static Process createSuProcess(String cmd) throws IOException { DataOutputStream os = null;
Process process = createSuProcess(); try {
os = new DataOutputStream(process.getOutputStream());
os.writeBytes(cmd + "\n");
os.writeBytes("exit $?\n");
} finally {
if(os != null) {
try {
os.close();
} catch (IOException e) {
}
}
} return process;
}
}
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