Android-ObjectAnimator实现动画开始，暂停，继续，结束

package com.example.test;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import android.animation.ObjectAnimator;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private ImageView imageView;
    private Button button1,button2;
    private ObjectAnimator objectAnimator;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView=findViewById(R.id.iv);
        button1=findViewById(R.id.bt_1);/*暂停按钮*/
        button2=findViewById(R.id.bt_2);/*继续按钮*/
        objectAnimator= ObjectAnimator.ofFloat(imageView, 
        "alpha",1f,0f,1f);/*创建*/
        /*设置属性*/
        objectAnimator.setDuration(4000);
        objectAnimator.setRepeatCount(ObjectAnimator.INFINITE);
        objectAnimator.start();
        button1.setOnClickListener(this);
        button2.setOnClickListener(this);
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)/*api版本*/
    public void onClick(View v){
        switch(v.getId()){
            case R.id.bt_1:
                objectAnimator.pause();/*点击暂停动画*/
                break;
            case R.id.bt_2:
                objectAnimator.resume();/*点击继续动画*/
                break;
                    Android-ObjectAnimator实现动画开始，暂停，继续，结束前言本人计机专业大学学生，这是第一篇博客。在某些地方的术语可能有所偏颇，酌情参考。接下来的博客内容都围绕大学Android移动应用开发中设计一个角色扮演游戏APP中遇到的开发问题并相应的解决问题。问题当设计两个角色对战界面时候，需要根据进度条动画显示可选技能界面，用户选择技能后继续进行进度条动画。这里就需要解决进度条...
 private int[] imageRes = {R.id.img_menu, R.id.img_menu1, R.id.img_menu2, R.id.img_menu3,
R.id.img_menu4, R.id.img_menu5};
private ArcMenu arcMenu;
//初始化，参数为资源图片id
 arcMenu = new ArcMenu(this, imageRes);
//点击事件，
				
最近做音乐播放相关的开发，需要实现一个较为简单的图片转动的一个功能，同时转动的时候在暂停播放的时候，需要停止在当前转动到的角度，所以使用了ObejctAnimator来实现，记录下实现的方法：
ObjectAnimator  mMusicAnimation =ObjectAnimator.ofFloat(mMusicImage, "rotation", 0f,360f);        
				
ObjectAnimator是ValueAnimator的子类，他本身就已经包含了时间引擎和值计算，所以它拥有为对象的某个属性设置动画的功能。这使得为任何对象设置动画更加的容易。你不再需要实现 ValueAnimator.AnimatorUpdateListener接口，因为ObjectAnimator动画自己会自动更新相应的属性值。
ObjectAnimator的实例和ValueAnimato
<ProgressBar
                    android:id="@+id/progress_voice"
                    style="?android:attr/progressBarStyleHorizontal"
                    android:layout_centerInParent="true"
    private TextView timerTextView;
    private Button startButton, pauseButton, resumeButton, resetButton;
    private Handler handler;
    private long startTime, timeInMilliseconds = 0;
    private boolean timerRunning = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        timerTextView = findViewById(R.id.timerTextView);
        startButton = findViewById(R.id.startButton);
        pauseButton = findViewById(R.id.pauseButton);
        resumeButton = findViewById(R.id.resumeButton);
        resetButton = findViewById(R.id.resetButton);
        handler = new Handler();
        startButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!timerRunning) {
                    startTime = SystemClock.uptimeMillis();
                    handler.postDelayed(runnable, 0);
                    timerRunning = true;
        pauseButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (timerRunning) {
                    handler.removeCallbacks(runnable);
                    timeInMilliseconds = SystemClock.uptimeMillis() - startTime;
                    timerRunning = false;
        resumeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!timerRunning) {
                    startTime = SystemClock.uptimeMillis() - timeInMilliseconds;
                    handler.postDelayed(runnable, 0);
                    timerRunning = true;
        resetButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!timerRunning) {
                    timeInMilliseconds = 0;
                    timerTextView.setText("00:00:00");
    private Runnable runnable = new Runnable() {
        @Override
        public void run() {
            timeInMilliseconds = SystemClock.uptimeMillis() - startTime;
            int seconds = (int) (timeInMilliseconds / 1000);
            int minutes = seconds / 60;
            seconds = seconds % 60;
            int milliseconds = (int) (timeInMilliseconds % 1000);
            timerTextView.setText(String.format("%02d:%02d:%03d", minutes, seconds, milliseconds));
            handler.postDelayed(this, 0);
这个代码包含了开始、暂停、继续和重置按钮，可以实现秒表的基本功能。