一个简单的自定义view。在里面封装了时间的倒计时，以及距离现在时间的时间计算

public class TimerTextView extends LinearLayout{ // 时间变量 private long second; private TextView tv_Time; private TextView tv_Unit; RefreshCallBack refreshCallBack; public TimerTextView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(context); } public TimerTextView(Context context, AttributeSet attrs) { super(context, attrs); initView(context); } public TimerTextView(Context context) { super(context); initView(context); } private void initView(Context context) { // 加载布局 LayoutInflater.from(context).inflate(R.layout.timer_text_view, this); tv_Time = (TextView) findViewById(R.id.countdown_time); tv_Unit = (TextView) findViewById(R.id.countdown_unit); } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); // 在控件被销毁时移除消息 handler.removeMessages(0); } private boolean isRun = true; // 是否启动了 private Handler handler = new Handler(Looper.getMainLooper()) { @Override public void handleMessage(Message msg) { switch (msg.what) { case 0: if (isRun) { if (second > 0) { second = second - 1; handler.sendEmptyMessageDelayed(0, 1000); }else{ if(null != refreshCallBack){ refreshCallBack.refreshCallBack(true); isRun = false; } } } break; } } }; public boolean isRun() { return isRun; } /** * 开始计时 */ public void start() { isRun = true; handler.removeMessages(0); handler.sendEmptyMessage(0); } /** * 结束计时 */ public void stop() { isRun = false; } public void diffTime(String endTime) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA); String startTime = sdf.format(new Date()); String format = "yyyy-MM-dd hh:mm:ss"; //按照传入的格式生成一个simpledateformate对象 SimpleDateFormat sd = new SimpleDateFormat(format); long nd = 1000 * 24 * 60 * 60;//一天的毫秒数 long nh = 1000 * 60 * 60;//一小时的毫秒数 long nm = 1000 * 60;//一分钟的毫秒数 long ns = 1000;//一秒钟的毫秒数long diff;try { //获得两个时间的毫秒时间差异 long diff = 0; try { diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime(); } catch (ParseException e) { e.printStackTrace(); } if (diff < 0) { if(null != refreshCallBack){ refreshCallBack.showCallBack(false); } return ; } else { if(null != refreshCallBack){ refreshCallBack.showCallBack(true); } long day = diff / nd;//计算差多少天 if (day > 0) { tv_Time.setText(String.valueOf(day)); tv_Unit.setText("天"); } else { long hour = diff % nd / nh;//计算差多少小时 if (hour > 0) { tv_Time.setText(String.valueOf(hour)); tv_Unit.setText("小时"); } else { long min = diff % nd % nh / nm;//计算差多少分钟 if (min > 0) { tv_Time.setText(String.valueOf(min)); tv_Unit.setText("分钟"); } else { second = diff%nd%nh%nm/ns;//计算差多少秒//输出结果// if(min > 0){// stringBuffer.append(sec+"秒");// } handler.removeMessages(0); handler.sendEmptyMessage(0); tv_Unit.setText("即将开始"); tv_Time.setVisibility(GONE); } } } } } public void setTextViewSize(int size){ if(null != tv_Time){ tv_Time.setTextSize(size); } if(null != tv_Unit){ tv_Unit.setTextSize(size); } } public void setTextViewSpace(String type){ if("Big".equals(type)){ LinearLayout.LayoutParams lp2 = (LayoutParams) tv_Time.getLayoutParams(); lp2.setMargins(0, 0, DensityUtil.dip2px(tv_Time.getContext(), 12), 0); tv_Time.setLayoutParams(lp2); tv_Time.setBackground(getResources().getDrawable(R.drawable.bg_video_count_down)); }else if("Middle".equals(type)){ tv_Time.setPadding(12, 0, 12, 0); LinearLayout.LayoutParams lp2 = (LayoutParams) tv_Time.getLayoutParams(); lp2.setMargins(0, 0,12, 0); tv_Time.setLayoutParams(lp2); }else { tv_Time.setPadding(8, 0, 8, 0); LinearLayout.LayoutParams lp2 = (LayoutParams) tv_Time.getLayoutParams(); lp2.setMargins(0, 0, 8, 0); tv_Time.setLayoutParams(lp2); } } public void setRefreshCallBack(RefreshCallBack refreshCallBack){ this.refreshCallBack = refreshCallBack; } public interface RefreshCallBack { public void refreshCallBack(boolean flag); public void showCallBack(boolean flag); } }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。