一个动态波浪纹Android界面

IndexActivity.java

package com.example.rubikrobot;

import androidx.appcompat.app.AppCompatActivity;

import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.view.View;
import android.view.Window;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.widget.Button;
import android.widget.ImageView;

import java.util.ArrayList;

public class IndexActivity extends AppCompatActivity {
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_index);
        final RippleBackground rippleBackground=findViewById(R.id.content);
        final Handler handler=new Handler(Looper.myLooper());
        //foundDevice=(ImageView)findViewById(R.id.foundDevice);
        button=findViewById(R.id.centerImage);
        rippleBackground.startRippleAnimation();
        Intent intent=new Intent();
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                intent.setClass(IndexActivity.this,MainActivity.class);
                startActivity(intent);
            }
        });

    }
}

RippleBackground.java

package com.example.rubikrobot;

import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.widget.RelativeLayout;

import java.util.ArrayList;

public class RippleBackground extends RelativeLayout{

    private static final int DEFAULT_RIPPLE_COUNT=6;
    private static final int DEFAULT_DURATION_TIME=3000;
    private static final float DEFAULT_SCALE=6.0f;
    private static final int DEFAULT_FILL_TYPE=0;

    private int rippleColor;
    private float rippleStrokeWidth;
    private float rippleRadius;
    private int rippleDurationTime;
    private int rippleAmount;
    private int rippleDelay;
    private float rippleScale;
    private int rippleType;
    private Paint paint;
    private boolean animationRunning=false;
    private AnimatorSet animatorSet;
    private ArrayList<Animator> animatorList;
    private LayoutParams rippleParams;
    private ArrayList<RippleView> rippleViewList=new ArrayList<RippleView>();

    public RippleBackground(Context context) {
        super(context);
    }

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

    public RippleBackground(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context, attrs);
    }

    private void init(final Context context, final AttributeSet attrs) {
        if (isInEditMode())
            return;

        if (null == attrs) {
            throw new IllegalArgumentException("Attributes should be provided to this view,");
        }

        final TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.RippleBackground);
        rippleColor=typedArray.getColor(R.styleable.RippleBackground_rb_color, getResources().getColor(R.color.rippelColor));
        rippleStrokeWidth=typedArray.getDimension(R.styleable.RippleBackground_rb_strokeWidth, getResources().getDimension(R.dimen.rippleStrokeWidth));
        rippleRadius=typedArray.getDimension(R.styleable.RippleBackground_rb_radius,getResources().getDimension(R.dimen.rippleRadius));
        rippleDurationTime=typedArray.getInt(R.styleable.RippleBackground_rb_duration,DEFAULT_DURATION_TIME);
        rippleAmount=typedArray.getInt(R.styleable.RippleBackground_rb_rippleAmount,DEFAULT_RIPPLE_COUNT);
        rippleScale=typedArray.getFloat(R.styleable.RippleBackground_rb_scale,DEFAULT_SCALE);
        rippleType=typedArray.getInt(R.styleable.RippleBackground_rb_type,DEFAULT_FILL_TYPE);
        typedArray.recycle();

        rippleDelay=rippleDurationTime/rippleAmount;

        paint = new Paint();
        paint.setAntiAlias(true);
        if(rippleType==DEFAULT_FILL_TYPE){
            rippleStrokeWidth=0;
            paint.setStyle(Paint.Style.FILL);
        }else
            paint.setStyle(Paint.Style.STROKE);
        paint.setColor(rippleColor);

        rippleParams=new LayoutParams((int)(2*(rippleRadius+rippleStrokeWidth)),(int)(2*(rippleRadius+rippleStrokeWidth)));
        rippleParams.addRule(CENTER_IN_PARENT, TRUE);

        animatorSet = new AnimatorSet();
        animatorSet.setInterpolator(new AccelerateDecelerateInterpolator());
        animatorList=new ArrayList<Animator>();

        for(int i=0;i<rippleAmount;i++){
            RippleView rippleView=new RippleView(getContext());
            addView(rippleView,rippleParams);
            rippleViewList.add(rippleView);
             final ObjectAnimator scaleXAnimator = ObjectAnimator.ofFloat(rippleView, "ScaleX", 1.0f, rippleScale);
            scaleXAnimator.setRepeatCount(ObjectAnimator.INFINITE);
            scaleXAnimator.setRepeatMode(ObjectAnimator.RESTART);
            scaleXAnimator.setStartDelay(i * rippleDelay);
            scaleXAnimator.setDuration(rippleDurationTime);
            animatorList.add(scaleXAnimator);
            final ObjectAnimator scaleYAnimator = ObjectAnimator.ofFloat(rippleView, "ScaleY", 1.0f, rippleScale);
            scaleYAnimator.setRepeatCount(ObjectAnimator.INFINITE);
            scaleYAnimator.setRepeatMode(ObjectAnimator.RESTART);
            scaleYAnimator.setStartDelay(i * rippleDelay);
            scaleYAnimator.setDuration(rippleDurationTime);
            animatorList.add(scaleYAnimator);
            final ObjectAnimator alphaAnimator = ObjectAnimator.ofFloat(rippleView, "Alpha", 1.0f, 0f);
            alphaAnimator.setRepeatCount(ObjectAnimator.INFINITE);
            alphaAnimator.setRepeatMode(ObjectAnimator.RESTART);
            alphaAnimator.setStartDelay(i * rippleDelay);
            alphaAnimator.setDuration(rippleDurationTime);
            animatorList.add(alphaAnimator);
        }

        animatorSet.playTogether(animatorList);
    }

    private class RippleView extends View{

        public RippleView(Context context) {
            super(context);
            this.setVisibility(View.INVISIBLE);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            int radius=(Math.min(getWidth(),getHeight()))/2;
            canvas.drawCircle(radius,radius,radius-rippleStrokeWidth,paint);
        }
    }

    public void startRippleAnimation(){
        if(!isRippleAnimationRunning()){
            for(RippleView rippleView:rippleViewList){
                rippleView.setVisibility(VISIBLE);
            }
            animatorSet.start();
            animationRunning=true;
        }
    }

    public void stopRippleAnimation(){
        if(isRippleAnimationRunning()){
            animatorSet.end();
            animationRunning=false;
        }
    }

    public boolean isRippleAnimationRunning(){
        return animationRunning;
    }
}

layout

<?xml version="1.0" encoding="utf-8"?>
<com.example.rubikrobot.RippleBackground
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#A2DAEC"
    android:id="@+id/content"
    app:rb_color="#0099CC"
    app:rb_radius="32dp"
    app:rb_rippleAmount="6"
    app:rb_duration="3000"
    app:rb_scale="6">
    <Button
        android:layout_width="64dp"
        android:layout_height="64dp"
        android:layout_centerInParent="true"
        android:id="@+id/centerImage"
        android:text="启动"
        android:textColor="@color/white"
        android:background="@drawable/ic_blue"
        />
</com.example.rubikrobot.RippleBackground>

效果图：

这是三个主要文件，剩下的没有展示。

链接：Github

参考文档以及链接均来自于：【Android开发】安卓炫酷效果集合