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 + "\n");
os.writeBytes("exit $?\n");
} finally {
if(os != null) {
try {
os.close();
} catch (IOException e) {
}
}
}
return process;
}
} |
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