我使用此代码为我的应用添加时钟:
<DigitalClock
android:id="@+id/digitalclock"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:textSize = "30sp"
/>
问题在于它还显示了几秒钟......有一种简单快捷的隐藏方式吗?我需要几小时和几分钟的hh:mm格式而不是hh:mm:ss!有什么建议?谢谢!
答案 0 :(得分:28)
找到答案here,对于其他寻找合适答案的人来说,这是:
DigitalClock.java
更改新CustomDigitalClock
package com.example;
import android.content.Context;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.os.Handler;
import android.os.SystemClock;
import android.provider.Settings;
import android.text.format.DateFormat;
import android.util.AttributeSet;
import android.widget.TextView;
import java.util.Calendar;
/**
* You have to make a clone of the file DigitalClock.java to use in your application, modify in the following manner:-
* private final static String m12 = "h:mm aa";
* private final static String m24 = "k:mm";
*/
public class CustomDigitalClock extends TextView {
Calendar mCalendar;
private final static String m12 = "h:mm aa";
private final static String m24 = "k:mm";
private FormatChangeObserver mFormatChangeObserver;
private Runnable mTicker;
private Handler mHandler;
private boolean mTickerStopped = false;
String mFormat;
public CustomDigitalClock(Context context) {
super(context);
initClock(context);
}
public CustomDigitalClock(Context context, AttributeSet attrs) {
super(context, attrs);
initClock(context);
}
private void initClock(Context context) {
Resources r = context.getResources();
if (mCalendar == null) {
mCalendar = Calendar.getInstance();
}
mFormatChangeObserver = new FormatChangeObserver();
getContext().getContentResolver().registerContentObserver(
Settings.System.CONTENT_URI, true, mFormatChangeObserver);
setFormat();
}
@Override
protected void onAttachedToWindow() {
mTickerStopped = false;
super.onAttachedToWindow();
mHandler = new Handler();
/**
* requests a tick on the next hard-second boundary
*/
mTicker = new Runnable() {
public void run() {
if (mTickerStopped) return;
mCalendar.setTimeInMillis(System.currentTimeMillis());
setText(DateFormat.format(mFormat, mCalendar));
invalidate();
long now = SystemClock.uptimeMillis();
long next = now + (1000 - now % 1000);
mHandler.postAtTime(mTicker, next);
}
};
mTicker.run();
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mTickerStopped = true;
}
/**
* Pulls 12/24 mode from system settings
*/
private boolean get24HourMode() {
return android.text.format.DateFormat.is24HourFormat(getContext());
}
private void setFormat() {
if (get24HourMode()) {
mFormat = m24;
} else {
mFormat = m12;
}
}
private class FormatChangeObserver extends ContentObserver {
public FormatChangeObserver() {
super(new Handler());
}
@Override
public void onChange(boolean selfChange) {
setFormat();
}
}
}
在布局xml中引用自定义类
<com.example.CustomDigitalClock
android:id="@+id/fragment_clock_digital"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DigitalClock" />
在activity / fragment
中加载CustomDigitalClockCustomDigitalClock dc = (CustomDigitalClock)
mFragmentView.findViewById(R.id.fragment_clock_digital);
答案 1 :(得分:2)
课程概述
像AnalogClock一样,但数码。显示秒数。 FIXME:实施 小时/分钟/秒的单独视图,因此比例字体不会 摇动渲染
根据FIXME
判断,最终可能会隐藏部分DigitalClock。我没有在Javadoc或源代码中找到任何你想要的东西。
除非您想编写自己的扩展DigitalClock的类(或者您自己的时钟实现),否则您可以使用另一个元素覆盖DigitalClock的秒部分,如果它可以满足您的目的。