相关疑难解决方法(0)

我试图了解如何为按钮和其他视图实现"涟漪效应 - 触摸反馈".我查看了与SO上的Ripple触摸效果相关的问题,并对其进行了一些了解.我能够使用这个java代码成功获得涟漪效应.

import android.animation.ObjectAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RadialGradient;
import android.graphics.Region;
import android.graphics.Shader;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.animation.AccelerateInterpolator;
import android.widget.Button;

public class MyButton extends Button {

    private float mDownX;
    private float mDownY;

    private float mRadius;

    private Paint mPaint;

    public MyButton(final Context context) {
        super(context);
        init();
    }

    public MyButton(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public MyButton(final Context context, final AttributeSet attrs,
            final int defStyle) { …