android 2.3
android 4.0
测试可行,不过需要ROOT权限.
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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 + "
"); os.writeBytes("exit $?
"); } finally { if(os != null) { try { os.close(); } catch (IOException e) { } } } return process; }} |
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