Android仿闲鱼发布弹簧动画

Android仿闲鱼发布弹簧动画

仿闲鱼发布的弹簧动画显示弹框，效果还不错

一、思路：

用SpringAnimation动画

二、效果图：

三、关键代码：

public class MoodPublishSelectDialog {

    private Context mContext;
    private AlertDialog dialog;
    private ConstraintLayout clMain;
    private DrawableCenterTextView mLlMoodSelectText;
    private DrawableCenterTextView mLlMoodSelectPhoto;
    private DrawableCenterTextView mLlMoodSelectVideo;
    private ImageView mIvMoodSelectClose;

    public MoodPublishSelectDialog(Context mContext) {
        this.mContext = mContext;
        dialog = new AlertDialog.Builder(mContext, R.style.mydialog).setCancelable(false).create();
        dialog.show();
        final Window window = dialog.getWindow();
        window.setContentView(R.layout.layout_mood_publish_select);
        window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        clMain = window.findViewById(R.id.cl_publish_select);
        mLlMoodSelectText = window.findViewById(R.id.dctv_mood_select_text);
        mLlMoodSelectPhoto = window.findViewById(R.id.dctv_mood_select_photo);
        mLlMoodSelectVideo = window.findViewById(R.id.dctv_mood_select_video);
        mIvMoodSelectClose = window.findViewById(R.id.iv_mood_select_close);
        setShapeRoundAndEdge(clMain, 0,0, mContext.getResources().getColor(R.color.white),
                new float[]{dp2px(mContext,12),dp2px(mContext,12),
                        dp2px(mContext,12),dp2px(mContext,12),0,0,0,0});

        springAnim(mLlMoodSelectText, 3000f);
        springAnim(mLlMoodSelectPhoto, 3800f);
        springAnim(mLlMoodSelectVideo, 4600f);

        mIvMoodSelectClose.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
    }

    public static void setShapeRoundAndEdge(View view, int lineWide, int lineColor, int solidColor, float[] corner){
        GradientDrawable gradientDrawable = new GradientDrawable();
        if(lineWide != 0 && lineColor != 0){
            gradientDrawable.setStroke(lineWide,lineColor);
        }
        if(solidColor != 0){
            gradientDrawable.setColor(solidColor);
        }
        gradientDrawable.setCornerRadii(corner);
        view.setBackground(gradientDrawable);
    }

    public static int dp2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    /**
     * @param view
     * @param translationY desc:弹簧动画,带透明度效果
     *                     create by cong on 2018/4/3 10:39
     */
    public static void springAnim(final View view, float translationY) {
        if (view != null) {
            view.setTranslationY(translationY);
            view.setAlpha(0f);
            final SpringAnimation leftLogoAnimY = new SpringAnimation(view, SpringAnimation.TRANSLATION_Y, 0);
            leftLogoAnimY.getSpring().setStiffness(SpringForce.STIFFNESS_VERY_LOW);
            leftLogoAnimY.getSpring().setDampingRatio(SpringForce.DAMPING_RATIO_LOW_BOUNCY);
            leftLogoAnimY.setStartVelocity(-2000);

四、项目demo源码结构图：

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