本文實例為大家分享了Android實現計時器功能的具體代碼，供大家參考，具體內容如下

計時器工具類

import android.annotation.SuppressLint;import android.os.Handler;import android.os.Message; import androidx.annotation.NonNull; import java.util.Timer;import java.util.TimerTask; /** * 用于計時，在主線程中使用此方法 */public class ChjTimer { private int time;//設置倒計時 X 秒 private int interval = 1000;//設置間隔時間 private ChjTimerInter chjTimerInter; //回調 private Timer timer; // 定時器 private static final int WHAT_REFREH = 0;//刷新 /** * 創建對象則開始計時 * * @param chjTimerInter 接口回調 */ public ChjTimer(ChjTimerInter chjTimerInter) {this.chjTimerInter = chjTimerInter; } /** * 創建對象開始計時 * @param interval 間隔時間通知(使用第一個方法，默認1秒鐘刷新一次) * @param chjTimerInter 接口回調 */ public ChjTimer(int interval, ChjTimerInter chjTimerInter) {this.chjTimerInter = chjTimerInter;this.interval = interval; } /** * 開始計時 */ public void start(int time) {this.time = time;if (timer == null){ timer = new Timer();} else { stop(); return;}timer.schedule(new TimerTask() { @Override public void run() {timesss.sendMessage(new Message()); }}, interval); } /** * 終止計時 */ public void stop() {if (timer != null) { timer.cancel(); timer = null;}if (timesss != null) timesss.removeMessages(WHAT_REFREH);if (chjTimerInter != null)chjTimerInter.stop(time); } @SuppressLint('HandlerLeak') private Handler timesss = new Handler() {@Overridepublic void handleMessage(@NonNull Message msg) { super.handleMessage(msg); if (msg.what != WHAT_REFREH) return; time -= 1; if (chjTimerInter != null) chjTimerInter.second(time); if (time == 0) {if (timer == null) return;timer.cancel();timer = null;if (chjTimerInter != null) chjTimerInter.expire(); } else if (time > 0) {timer.schedule(new TimerTask() { @Override public void run() {timesss.sendMessage(new Message()); }}, interval); }} }; /** * 接口 */ public interface ChjTimerInter { /** * 間隔時間內回調 */void second(int time); /** * 完成回調 */void expire(); /** * 終止計時 */void stop(int time); } }

使用演示

import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.TextView; public class MainActivity extends Activity implements View.OnClickListener, ChjTimer.ChjTimerInter { private TextView tiems,timnew; private ChjTimer chjTimer; @Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tiems = findViewById(R.id.time);timnew = findViewById(R.id.timnew);findViewById(R.id.but).setOnClickListener(this);findViewById(R.id.buts).setOnClickListener(this); chjTimer = new ChjTimer(this); } @Override public void onClick(View view) {switch (view.getId()){ case R.id.but:tiems.setText('10');timnew.setText('正在計時');chjTimer.start(10);break; case R.id.buts:chjTimer.stop();break;} } @Override public void second(int time) {tiems.setText(time + ''); } @Override public void expire() {timnew.setText('計時完成'); } @Override public void stop(int time) {timnew.setText('計時終止' + time); }}

頁面布局

<?xml version='1.0' encoding='utf-8'?><LinearLayout xmlns:android='http://schemas.android.com/apk/res/android' xmlns:app='http://schemas.android.com/apk/res-auto' xmlns:tools='http://schemas.android.com/tools' android:orientation='vertical' android:layout_gravity='center' android:gravity='center' android:layout_width='match_parent' android:layout_height='match_parent' tools:context='.MainActivity'> <TextViewandroid: android:layout_width='wrap_content'android:layout_height='wrap_content'android:text='計時完成'app:layout_constraintBottom_toBottomOf='parent'app:layout_constraintLeft_toLeftOf='parent'app:layout_constraintRight_toRightOf='parent'app:layout_constraintTop_toTopOf='parent' /> <TextViewandroid: android:text='0'android:layout_width='wrap_content'android:layout_height='wrap_content' /> <Buttonandroid: android:text='開始'android:layout_width='wrap_content'android:layout_height='wrap_content' /> <Buttonandroid: android:text='終止'android:layout_width='wrap_content'android:layout_height='wrap_content' /> </LinearLayout>

演示效果

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。