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Android中的动画ProgressBar更新

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少年击剑更吹箫，剑气箫心一例消。这篇文章主要讲述Android中的动画ProgressBar更新相关的知识，希望能为你提供帮助。
我在我的应用程序中使用ProgressBar，我在AsyncTask的onProgressUpdate中更新。到现在为止还挺好。
我想要做的是为进度更新设置动画，这样它不仅可以“跳转”到值，而且可以平滑地移动到它。
我尝试这样做运行以下代码：

this.runOnUiThread(new Runnable() {@Override public void run() { while (progressBar.getProgress() < progress) { progressBar.incrementProgressBy(1); progressBar.invalidate(); try { Thread.sleep(10); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }});

【Android中的动画ProgressBar更新】问题是进度条在完成其最终值（进度变量）之前不会更新其状态。中间的所有状态都不会显示在屏幕上。调用progressBar.invalidate（）也没有帮助。
有任何想法吗？谢谢！
答案我用android动画：
public class ProgressBarAnimation extends Animation{ private ProgressBar progressBar; private float from; private floatto; public ProgressBarAnimation(ProgressBar progressBar, float from, float to) { super(); this.progressBar = progressBar; this.from = from; this.to = to; }@Override protected void applyTransformation(float interpolatedTime, Transformation t) { super.applyTransformation(interpolatedTime, t); float value = https://www.songbingjia.com/android/from + (to - from) * interpolatedTime; progressBar.setProgress((int) value); }}

并称之为：
ProgressBarAnimation anim = new ProgressBarAnimation(progress, from, to); anim.setDuration(1000); progress.startAnimation(anim);

注意：如果from和to值太低而无法生成平滑动画，只需将它们相乘100左右即可。如果你这样做，也不要忘记将setMax（..）相乘。
另一答案我使用ObjectAnimator
private ProgressBar progreso; private ObjectAnimator progressAnimator; progreso = (ProgressBar)findViewById(R.id.progressbar1); progressAnimator = ObjectAnimator.ofFloat(progreso, "progress", 0.0f,1.0f); progressAnimator.setDuration(7000); progressAnimator.start();

另一答案这是@Eli Konky解决方案的改进版本：
public class ProgressBarAnimation extends Animation { private ProgressBar mProgressBar; private int mTo; private int mFrom; private long mStepDuration; /** * @param fullDuration - time required to fill progress from 0% to 100% */ public ProgressBarAnimation(ProgressBar progressBar, long fullDuration) { super(); mProgressBar = progressBar; mStepDuration = fullDuration / progressBar.getMax(); }public void setProgress(int progress) { if (progress < 0) { progress = 0; }if (progress > mProgressBar.getMax()) { progress = mProgressBar.getMax(); }mTo = progress; mFrom = mProgressBar.getProgress(); setDuration(Math.abs(mTo - mFrom) * mStepDuration); mProgressBar.startAnimation(this); }@Override protected void applyTransformation(float interpolatedTime, Transformation t) { float value = https://www.songbingjia.com/android/mFrom + (mTo - mFrom) * interpolatedTime; mProgressBar.setProgress((int) value); } }

用法：
ProgressBarAnimation mProgressAnimation = new ProgressBarAnimation(mProgressBar, 1000); .../* Update progress later anywhere in code: */ mProgressAnimation.setProgress(progress);

另一答案最简单的方法，使用ObjectAnimator：
ObjectAnimator.ofInt(progressBar, "progress", progressValue) .setDuration(300) .start();

其中progressValue是0-100范围内的整数（默认情况下上限设置为100，但您可以使用Progressbar#setMax()方法更改它）
您还可以通过使用setInterpolator()方法设置不同的插值器来更改值的更改方式。这是不同插值器的可视化：https://www.youtube.com/watch?v=6UL7PXdJ6-E
另一答案编辑：虽然我的回答有效，但Eli Konkys的回答更好。用它。
如果您的线程在UI线程上运行，那么它必须放弃UI线程以使视图有机会更新。目前，您可以告诉进度条“更新为1，更新为2，更新为3”，而无需释放UI线程，因此它实际上可以更新。
解决此问题的最佳方法是使用Asynctask，它具有在UI线程内外运行的本机方法：
public class MahClass extends AsyncTask< Void, Void, Void> {@Override protected Void doInBackground(Void... params) { while (progressBar.getProgress() < progress) { publishProgress(); try { Thread.sleep(10); } catch (InterruptedException e) { e.printStackTrace(); } } return null; }@Override protected void onProgressUpdate(Void... values) { progressBar.incrementProgressBy(1); } }

AsyncTask最初可能看起来很复杂，但它对于许多不同的任务非常有效，或者在Android API中指定：
“AsyncTask可以正确，轻松地使用UI线程。该类允许执行后台操作并在UI线程上发布结果，而无需操纵线程和/或处理程序。”
另一答案您可以尝试使用处理程序/ runnable代替......
private Handler h = new Handler(); private Runnable myRunnable = new Runnable() { public void run() { if (progressBar.getProgress() < progress) { progressBar.incrementProgressBy(1); progressBar.invalidate(); h.postDelayed(myRunnable, 10); //run again after 10 ms } }; //trigger runnable in your code h.postDelayed(myRunnable, 10); //don't forget to cancel runnable when you reach 100% h.removeCallbacks(myRunnable);

另一答案Kotlin这样做的方式
import kotlinx.android.synthetic.main.activity.*progressBar.max = value * 100 progressBar.progress = 0val progressAnimator = ObjectAnimator.ofInt(progressBar, "progress", progressBar.progress, progressBar.progress + 100) progressAnimator.setDuration(7000) progressAnimator.start()

另一答案
ProgressBar().setProgress(int progress, boolean animate)

Android已经为您解决了这个问题
另一答案这是a.ch的改进版本。解决方案，您还可以使用循环ProgressBar旋转。有时需要设置不断的进度并仅改变旋转，甚至改变进度和旋转。也可以强制顺时针或逆时针旋转。我希望它会有所帮助。
public class ProgressBarAnimation extends Animation { private ProgressBar progressBar; private int progressTo; private int progressFrom; private float rotationTo; private float rotationFrom; private long animationDuration; private boolean forceClockwiseRotation; private boolean forceCounterClockwiseRotation; /** * Default constructor * @param progressBar ProgressBar object * @param fullDuration - time required to change progress/rotation */ public ProgressBarAnimation(ProgressBar progressBar, long fullDuration) { super(); this.progressBar = progressBar; animationDuration = fullDuration; forceClockwiseRotation = false; forceCounterClockwiseRotation = false; }/** * Method for forcing clockwise rotation for progress bar * Method also disables forcing counter clockwise rotation * @param forceClockwiseRotation true if should force clockwise rotation for progress bar */ public void forceClockwiseRotation(boolean forceClockwiseRotation) { this.forceClockwiseRotation = forceClockwiseRotation; if (forceClockwiseRotation & & forceCounterClockwiseRotation) { // Can't force counter clockwise and clockwise rotation in the same time forceCounterClockwiseRotation = false; } }/** * Method for forcing counter clockwise rotation for progress bar * Method also disables forcing clockwise rotation * @param forceCounterClockwiseRotation true if should force counter clockwise rotation for progress bar */ public void forceCounterClockwiseRotation(boolean forceCounterClockwiseRotation) { this.forceCounterClockwiseRotation = forceCounterClockwiseRotation; if (forceCounterClockwiseRotation & & forceClockwiseRotation) { // Can't force counter clockwise and clockwise rotation in the sa

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