Android 自定義view仿支付寶咻一咻功能

更新時間：2016年12月29日 13:59:33 作者：coderinchina

支付寶上有一個咻一咻的功能,就是點擊圖片后四周有水波紋的這種效果,今天就通過本文給大家分享實現(xiàn)此功能的思路及實例代碼，一起看看吧

支付寶上有一個咻一咻的功能,就是點擊圖片后四周有水波紋的這種效果,今天也寫一個類似的功能。

效果如下所示：

思路：

就是幾個圓的半徑不斷在變大,這個可以使用動畫縮放實現(xiàn),還有透明動畫

還有就是這是好幾個圓,然后執(zhí)行的動畫有個延遲效果,其實這些動畫是放在一起執(zhí)行的,熟悉屬性動畫的知道已經(jīng)給我們提供了同步執(zhí)行動畫和順序執(zhí)行動畫的實現(xiàn)api,也會會有人說這幾個view就是在onDraw()方法中畫幾個圓,可能會說我還要繼承容器view去onLayout()方法中這些子view添加在某個特定的區(qū)域,當(dāng)然這也是可以的,其實簡單的就是以圖片為中心(圖片imageview在父view的中心),然后畫圓,指定每個字view的寬和高就行了,具體看代碼：

package com.zhifubaoxiuyixiu.view;
import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.widget.FrameLayout;
import java.util.ArrayList;
/**
 * Created by admin on 2016/12/29.
 */
public class ZhifubaoFrameLayout extends FrameLayout {
 private int rippleColor = Color.parseColor("#0099CC");//水波紋的顏色
 private int radius = 0;//水波紋圓的半徑
 private long anim_duration = 3000;//動畫執(zhí)行的時間
 private int water_ripple_count = 6;
 private int scale = 6;//動畫縮放比例
 private long animDelay;//動畫延遲的時間
 private Paint paint;
 private AnimatorSet animatorSet;
 private ArrayList<Animator> animatorList;
 private FrameLayout.LayoutParams rippleParams;
 private ArrayList<WateRipple> rippleViewList=new ArrayList<WateRipple>();
 private boolean isAnimRunning = false;
 public ZhifubaoFrameLayout(Context context) {
  this(context,null);
 }
 public ZhifubaoFrameLayout(Context context, AttributeSet attrs) {
  this(context,attrs,0);
 }
 public ZhifubaoFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  initPaint();
  addChildView();
  initAnim();
 }
 /**
  * 初始化動畫
  */
 private void initAnim() {
  animatorSet = new AnimatorSet();
  animatorSet.setInterpolator(new AccelerateDecelerateInterpolator());
  animatorList=new ArrayList<Animator>();
  for(int i=0;i<rippleViewList.size();i++){//幾個水波紋
   final ObjectAnimator scaleXAnimator = ObjectAnimator.ofFloat(rippleViewList.get(i), "ScaleX", 1.0f, scale);
   scaleXAnimator.setRepeatCount(ObjectAnimator.INFINITE);
   scaleXAnimator.setRepeatMode(ObjectAnimator.RESTART);
   scaleXAnimator.setStartDelay(i * animDelay);
   scaleXAnimator.setDuration(anim_duration);
   animatorList.add(scaleXAnimator);
   final ObjectAnimator scaleYAnimator = ObjectAnimator.ofFloat(rippleViewList.get(i), "ScaleY", 1.0f, scale);
   scaleYAnimator.setRepeatCount(ObjectAnimator.INFINITE);
   scaleYAnimator.setRepeatMode(ObjectAnimator.RESTART);
   scaleYAnimator.setStartDelay(i * animDelay);
   scaleYAnimator.setDuration(anim_duration);
   animatorList.add(scaleYAnimator);
   final ObjectAnimator alphaAnimator = ObjectAnimator.ofFloat(rippleViewList.get(i), "Alpha", 1.0f, 0f);
   alphaAnimator.setRepeatCount(ObjectAnimator.INFINITE);
   alphaAnimator.setRepeatMode(ObjectAnimator.RESTART);
   alphaAnimator.setStartDelay(i * animDelay);
   alphaAnimator.setDuration(anim_duration);
   animatorList.add(alphaAnimator);
  }
  animatorSet.playTogether(animatorList);
 }
 /**
  * 添加水波紋子view
  */
 private void addChildView() {
  radius = 32;
  animDelay=350;
  rippleParams=new FrameLayout.LayoutParams((int)(2*(radius)),(int)(2*(radius)));
  rippleParams.gravity = Gravity.CENTER;
  for(int i=0;i<water_ripple_count;i++){//幾個水波紋
   WateRipple rippleView=new WateRipple(getContext(),paint);
   addView(rippleView,rippleParams);
   rippleViewList.add(rippleView);
  }
 }

 /**
  * 初始化畫筆
  */
 private void initPaint() {
  paint = new Paint();
  paint.setAntiAlias(true);
  paint.setColor(rippleColor);
  paint.setStyle(Paint.Style.FILL);
 }
 /**
  * 開啟動畫
  */
 public void startRippleAnimation(){
  if(!isRunning()){
   for(WateRipple wateRipple:rippleViewList){
    wateRipple.setVisibility(VISIBLE);
   }
   animatorSet.start();
   isAnimRunning=true;
  }
 }
 /**
  * 動畫停止運行
  */
 public void stopAnimation(){
  if(isRunning()){
   animatorSet.cancel();
   isAnimRunning=false;
  }
 }
 /**
  * 判斷是否動畫在運行
  * @return
  */
 public boolean isRunning(){
  return isAnimRunning;
 }
 /**
  * ui不可見時關(guān)閉動畫
  * @param visibility
  */
 @Override
 protected void onWindowVisibilityChanged(int visibility) {
  super.onWindowVisibilityChanged(visibility);
  if(visibility==View.INVISIBLE||visibility ==View.GONE){
   stopAnimation();
  }
 }
}

每個水波紋view

package com.zhifubaoxiuyixiu.view;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.View;
/**
 * Created by admin on 2016/12/29.
 */
public class WateRipple extends View {
 private Paint mPaint;
 public WateRipple(Context context, Paint paint){
  super(context);
  if(paint==null){
   this.mPaint = new Paint();
  }else{
   this.mPaint = paint;
  }
  setVisibility(View.INVISIBLE);//剛開始設(shè)置不可見
 }
 public WateRipple(Context context) {
  super(context);
 }
 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  int radius=(Math.min(getWidth(),getHeight()))/2;
  canvas.drawCircle(radius,radius,radius,mPaint);
 }
}

圓形圖片：

package com.zhifubaoxiuyixiu.view;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Shader;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.util.AttributeSet;
import android.view.View;
import com.zhifubaoxiuyixiu.R;
/**
 * Created by admin on 2016/12/29.
 */
public class CircleView extends View {
 private BitmapShader bitmapShaderp ;
 private ShapeDrawable shapeDrawable;
 public CircleView(Context context) {
  this(context,null);
 }
 public CircleView(Context context, AttributeSet attrs) {
  this(context, attrs,0);
 }
 public CircleView(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  initBitmap();
 }
 private void initBitmap() {
  Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.grid);
  shapeDrawable = new ShapeDrawable(new OvalShape());
  bitmapShaderp = new BitmapShader(bitmap, Shader.TileMode.CLAMP,Shader.TileMode.CLAMP);
  shapeDrawable.getPaint().setShader(bitmapShaderp);
 }
 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  shapeDrawable.setBounds(0,0,getWidth(),getHeight());
  shapeDrawable.draw(canvas);
 }
}

布局文件：

<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 >
 <com.zhifubaoxiuyixiu.view.ZhifubaoFrameLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:id="@+id/root"
  >
  <com.zhifubaoxiuyixiu.view.CircleView
   android:layout_width="64dp"
   android:layout_height="64dp"
   android:layout_centerInParent="true"
   android:id="@+id/imageView"
   android:layout_gravity="center"
   android:src="@mipmap/grid"/>
 </com.zhifubaoxiuyixiu.view.ZhifubaoFrameLayout>
</RelativeLayout>

使用：

package com.zhifubaoxiuyixiu;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import com.zhifubaoxiuyixiu.view.CircleView;
import com.zhifubaoxiuyixiu.view.ZhifubaoFrameLayout;
public class MainActivity extends Activity {
 private CircleView imageView;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  imageView = (CircleView) findViewById(R.id.imageView);
  final ZhifubaoFrameLayout root = (ZhifubaoFrameLayout) findViewById(R.id.root);
  imageView.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    root.startRippleAnimation();
   }
  });
 }
}

以上所述是小編給大家介紹的Android 自定義view仿支付寶咻一咻功能，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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