android+digitalclock+格式,Android：DigitalClock删除秒

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在这里找到答案，其他正在寻找有效答案的人是：

DigitalClock.java从Android源克隆/复制

更改新的格式字符串 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

android:id="@+id/fragment_clock_digital"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="DigitalClock" />

在活动/片段中加载CustomDigitalClock

CustomDigitalClock dc = (CustomDigitalClock)

mFragmentView.findViewById(R.id.fragment_clock_digital);

2020-09-26