Android：DigitalClock删除秒

Question

我使用以下代码为我的应用添加了时钟：

      <DigitalClock 
    android:id="@+id/digitalclock"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:textSize = "30sp"
    />

问题在于它还显示秒。.有一种简单快速的隐藏方法吗？我只需要hh：mm格式的小时和分钟，而不是hh：mm：ss！有什么建议？谢谢！

Answer 1

在这里找到答案，其他正在寻找有效答案的人是：

1. DigitalClock.java从Android源克隆/复制
2. 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();
            }
        }

    }

1. 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" />
   

2. 在活动/片段中加载CustomDigitalClock

        CustomDigitalClock dc = (CustomDigitalClock)
    mFragmentView.findViewById(R.id.fragment_clock_digital);