暂停和恢复翻译动画(Pause and Resume Translate Animation)

2019-06-23 09:42发布

我使用翻译动画用于移动ImageView 。 我使用此代码:

TranslateAnimation set1 = new TranslateAnimation(-4, 10, -110, 0);
        set1.setDuration(3000);
        TranslateAnimation set2 = new TranslateAnimation(10, -3, 0, 115);
        set2.setDuration(3000);
        set2.setStartOffset(2200);
        TranslateAnimation set3 = new TranslateAnimation(-3, -20, 0, -100);
        set3.setDuration(3000);
        set3.setStartOffset(4500);
        TranslateAnimation set4 = new TranslateAnimation(0, 13, 0, -120);
        set4.setDuration(3000);
        set4.setStartOffset(6500);

        animSet.addAnimation(set1);
        animSet.addAnimation(set2);
        animSet.addAnimation(set3);
        animSet.addAnimation(set4);

        animSet.setFillAfter(true);

创建一组动画后,我申请他们在ImageView是这样的:

image = (ImageView)findViewById(R.id.img);
        image.startAnimation(animSet);

一切工作正常,但我不能暂停动画和恢复按钮点击

我怎样才能做到这一点?

我什么都试过,但没有成功。 任何想法如何做到这一点?

请帮忙!

Answer 1:

寻找一段时间后,我发现这个链接 ,并检查该工作翻译动画或不和某些修改之后,这是工作动画太多!

请参见下面修改后的代码:

public class TranslateAnim extends TranslateAnimation{

    public TranslateAnim(float fromXDelta, float toXDelta, float fromYDelta,
            float toYDelta) {
        super(fromXDelta, toXDelta, fromYDelta, toYDelta);
        // TODO Auto-generated constructor stub
    }

    private long mElapsedAtPause=0;
    private boolean mPaused=false;

    @Override
    public boolean getTransformation(long currentTime, Transformation outTransformation) {
        if(mPaused && mElapsedAtPause==0) {
            mElapsedAtPause=currentTime-getStartTime();
        }
        if(mPaused)
            setStartTime(currentTime-mElapsedAtPause);
        return super.getTransformation(currentTime, outTransformation);
    }

    public void pause() {
        mElapsedAtPause=0;
        mPaused=true;
    }

    public void resume() {
        mPaused=false;
    }
}

我只改变类名,扩展类名和这个类的构造函数。

你可以使用它像:

TranslateAnim set1, set2, set3, set4; // objects of TranslateAnim Class

set1 = new TranslateAnim(-4, 10, -110, 0); // initialize all objects like this way

animSet.addAnimation(set1); // add all animation objests in your animation set as you do before

animSet.setFillAfter(true);

并启动动画后,你只能叫暂停和恢复方法。 感谢约翰对分享他与我们的代码。

希望这会解决您的问题。 :)



Answer 2:

你也可以这样做: 它还是可以这样:

public class MyTranslateAnimation extends TranslateAnimation {

    private long mTimePause, mTimeTotal;
    private boolean mPause;


    public MyTranslateAnimation(Context context, AttributeSet attrs) {

        super(context, attrs);

    }

    @Override
    public boolean getTransformation(long currentTime, Transformation outTransformation) {
        updateTime(currentTime);
        return super.getTransformation(mTimeTotal - mTimePause, outTransformation);
    }

    private void updateTime(long currentTime) {
        long dt = currentTime - mTimeTotal;
        mTimeTotal += dt;
        if (mPause) {
            mTimePause += dt;
        }
    }

    public void pause() {
        mPause = true;
    }

    public void resume() {
        mPause = false;
    }

}

在创建动画的从XML,您可以创建自己的AnimationUtils子类,像这样从XML创建动画可以让你的AnimationUtils:

public class MyAnimationUtils {

    public static Animation loadAnimation(Context context, int id) throws Resources.NotFoundException {

        XmlResourceParser parser = null;
        try {
            parser = context.getResources().getAnimation(id);
            return createAnimationFromXml(context, parser);
        } catch (XmlPullParserException ex) {
            Resources.NotFoundException rnf = new Resources.NotFoundException("Can't load animation resource ID #0x" + Integer.toHexString(id));
            rnf.initCause(ex);
            throw rnf;
        } catch (IOException ex) {
            Resources.NotFoundException rnf = new Resources.NotFoundException("Can't load animation resource ID #0x" + Integer.toHexString(id));
            rnf.initCause(ex);
            throw rnf;
        } finally {
            if (parser != null) parser.close();
        }

    }

    private static Animation createAnimationFromXml(Context c, XmlPullParser parser) throws XmlPullParserException, IOException {

        return createAnimationFromXml(c, parser, null, Xml.asAttributeSet(parser));

    }

    private static Animation createAnimationFromXml(Context c, XmlPullParser parser, AnimationSet parent, AttributeSet attrs) throws XmlPullParserException, IOException {

        Animation anim = null;

        // Make sure we are on a start tag.
        int type;
        int depth = parser.getDepth();

        while (((type=parser.next()) != XmlPullParser.END_TAG || parser.getDepth() > depth)
                && type != XmlPullParser.END_DOCUMENT) {

            if (type != XmlPullParser.START_TAG) {
                continue;
            }

            String  name = parser.getName();

            if (name.equals("set")) {
                anim = new AnimationSet(c, attrs);
                createAnimationFromXml(c, parser, (AnimationSet)anim, attrs);
            } else if (name.equals("alpha")) {
                anim = new AlphaAnimation(c, attrs);
            } else if (name.equals("scale")) {
                anim = new ScaleAnimation(c, attrs);
            }  else if (name.equals("rotate")) {
                anim = new RotateAnimation(c, attrs);
            }  else if (name.equals("translate")) {
                //anim = new TranslateAnimation(c, attrs);
                anim = new MyTranslateAnimation(c, attrs); // отредактировали только эту строчку, остальное взяли как было
            } else {
                throw new RuntimeException("Unknown animation name: " + parser.getName());
            }

            if (parent != null) {
                parent.addAnimation(anim);
            }
        }

        return anim;

    }

}

然后你建立这样的动画: 这是如何创建一个动画:

MyTranslateAnimation cloud1 = (MyTranslateAnimation) MyAnimationUtils.loadAnimation(this, R.anim.main_cloud1);

希望这有助于。 使用健康的!



文章来源: Pause and Resume Translate Animation