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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # Android特效專輯(十二)——仿支付寶咻一咻功能實現波紋擴散特效,精細小巧的View > 先來看看這個效果 ![](https://box.kancloud.cn/2016-02-24_56cd2c1bb0a55.jpg) > 這是我的在Only上添加的效果,說實話,Only現在都還只是半成品,臺面都上不了,怪自己技術不行,也太懶了? > *PS:這個view也是我模仿了人家的效果,參考了人家的思路寫的,不是純手擼,罪過罪過,網上應該也能找到很多這樣的效果,我只是加入了一些自己的需求在里面* 我么新建一個工程——Whew ## RoundImageView > 這個之前講過,網上 的粒子,把頭像變成圓形的,這里就不多說了,直接擼代碼吧! ~~~ package com.lgl.whew; /** * 圓形頭像 * Created by LGL on 2016/1/12. */ import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.graphics.drawable.NinePatchDrawable; import android.util.AttributeSet; import android.widget.ImageView; /** * 圓形ImageView,可設置最多兩個寬度不同且顏色不同的圓形邊框。 * * 設置顏色在xml布局文件中由自定義屬性配置參數指定 */ public class RoundImageView extends ImageView { private int mBorderThickness = 0; private Context mContext; private int defaultColor = 0xFFFFFFFF; // 如果只有其中一個有值,則只畫一個圓形邊框 private int mBorderOutsideColor = 0; private int mBorderInsideColor = 0; // 控件默認長、寬 private int defaultWidth = 0; private int defaultHeight = 0; public RoundImageView(Context context) { super(context); mContext = context; } public RoundImageView(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; setCustomAttributes(attrs); } public RoundImageView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); mContext = context; setCustomAttributes(attrs); } private void setCustomAttributes(AttributeSet attrs) { TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.roundedimageview); mBorderThickness = a.getDimensionPixelSize( R.styleable.roundedimageview_border_thickness, 0); mBorderOutsideColor = a .getColor(R.styleable.roundedimageview_border_outside_color, defaultColor); mBorderInsideColor = a.getColor( R.styleable.roundedimageview_border_inside_color, defaultColor); } @Override protected void onDraw(Canvas canvas) { Drawable drawable = getDrawable(); if (drawable == null) { return; } if (getWidth() == 0 || getHeight() == 0) { return; } this.measure(0, 0); if (drawable.getClass() == NinePatchDrawable.class) return; Bitmap b = ((BitmapDrawable) drawable).getBitmap(); Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true); if (defaultWidth == 0) { defaultWidth = getWidth(); } if (defaultHeight == 0) { defaultHeight = getHeight(); } int radius = 0; if (mBorderInsideColor != defaultColor && mBorderOutsideColor != defaultColor) {// 定義畫兩個邊框,分別為外圓邊框和內圓邊框 radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - 2 * mBorderThickness; // 畫內圓 drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderInsideColor); // 畫外圓 drawCircleBorder(canvas, radius + mBorderThickness + mBorderThickness / 2, mBorderOutsideColor); } else if (mBorderInsideColor != defaultColor && mBorderOutsideColor == defaultColor) {// 定義畫一個邊框 radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness; drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderInsideColor); } else if (mBorderInsideColor == defaultColor && mBorderOutsideColor != defaultColor) {// 定義畫一個邊框 radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness; drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderOutsideColor); } else {// 沒有邊框 radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2; } Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius); canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight / 2 - radius, null); } /** * 獲取裁剪后的圓形圖片 */ public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) { Bitmap scaledSrcBmp; int diameter = radius * 2; // 為了防止寬高不相等,造成圓形圖片變形,因此截取長方形中處于中間位置最大的正方形圖片 int bmpWidth = bmp.getWidth(); int bmpHeight = bmp.getHeight(); int squareWidth = 0, squareHeight = 0; int x = 0, y = 0; Bitmap squareBitmap; if (bmpHeight > bmpWidth) {// 高大于寬 squareWidth = squareHeight = bmpWidth; x = 0; y = (bmpHeight - bmpWidth) / 2; // 截取正方形圖片 squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth, squareHeight); } else if (bmpHeight < bmpWidth) {// 寬大于高 squareWidth = squareHeight = bmpHeight; x = (bmpWidth - bmpHeight) / 2; y = 0; squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth, squareHeight); } else { squareBitmap = bmp; } if (squareBitmap.getWidth() != diameter || squareBitmap.getHeight() != diameter) { scaledSrcBmp = Bitmap.createScaledBitmap(squareBitmap, diameter, diameter, true); } else { scaledSrcBmp = squareBitmap; } Bitmap output = Bitmap.createBitmap(scaledSrcBmp.getWidth(), scaledSrcBmp.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(output); Paint paint = new Paint(); Rect rect = new Rect(0, 0, scaledSrcBmp.getWidth(), scaledSrcBmp.getHeight()); paint.setAntiAlias(true); paint.setFilterBitmap(true); paint.setDither(true); canvas.drawARGB(0, 0, 0, 0); canvas.drawCircle(scaledSrcBmp.getWidth() / 2, scaledSrcBmp.getHeight() / 2, scaledSrcBmp.getWidth() / 2, paint); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap(scaledSrcBmp, rect, rect, paint); bmp = null; squareBitmap = null; scaledSrcBmp = null; return output; } /** * 邊緣畫圓 */ private void drawCircleBorder(Canvas canvas, int radius, int color) { Paint paint = new Paint(); /* 去鋸齒 */ paint.setAntiAlias(true); paint.setFilterBitmap(true); paint.setDither(true); paint.setColor(color); /* 設置paint的 style 為STROKE:空心 */ paint.setStyle(Paint.Style.STROKE); /* 設置paint的外框寬度 */ paint.setStrokeWidth(mBorderThickness); canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint); } } ~~~ > 這里值得注意的是,要使用這個必須自定義一些屬性,我們在values下新建一個attr.xml ~~~ <?xml version="1.0" encoding="utf-8"?> <resources> <declare-styleable name="roundedimageview"> <attr name="border_thickness" format="dimension" /> <attr name="border_inside_color" format="color" /> <attr name="border_outside_color" format="color"></attr> </declare-styleable> </resources> ~~~ > 然后在xml文件中引入命名空間 ~~~ xmlns:imagecontrol="http://schemas.android.com/apk/res-auto" ~~~ > 我們直接看layout_mian.xml吧 ## layout_mian.xml > 就一些布局咯 ~~~ <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:imagecontrol="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <com.lgl.whew.WhewView android:id="@+id/wv" android:layout_width="match_parent" android:layout_height="match_parent" /> <com.lgl.whew.RoundImageView android:id="@+id/my_photo" android:layout_width="100dp" android:layout_height="100dp" android:layout_centerInParent="true" android:src="@drawable/myphoto" imagecontrol:border_inside_color="#bc0978" imagecontrol:border_outside_color="#ba3456" imagecontrol:border_thickness="1dp" /> </RelativeLayout> </LinearLayout> ~~~ > 這樣你就可以使用圓形圖片了,我們接下來看波紋的繪制 ## WhewView ~~~ package com.lgl.whew; import java.util.ArrayList; import java.util.List; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.util.AttributeSet; import android.view.View; /** * 模仿咻一咻 * * @author LGL * */ public class WhewView extends View { private Paint paint; private int maxWidth = 255; // 是否運行 private boolean isStarting = false; private List<String> alphaList = new ArrayList<String>(); private List<String> startWidthList = new ArrayList<String>(); public WhewView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); // TODO Auto-generated constructor stub init(); } public WhewView(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub init(); } public WhewView(Context context) { super(context); // TODO Auto-generated constructor stub init(); } private void init() { paint = new Paint(); // 設置博文的顏色 paint.setColor(0x0059ccf5); alphaList.add("255");// 圓心的不透明度 startWidthList.add("0"); } @Override public void onDraw(Canvas canvas) { super.onDraw(canvas); setBackgroundColor(Color.TRANSPARENT);// 顏色:完全透明 // 依次繪制 同心圓 for (int i = 0; i < alphaList.size(); i++) { int alpha = Integer.parseInt(alphaList.get(i)); // 圓半徑 int startWidth = Integer.parseInt(startWidthList.get(i)); paint.setAlpha(alpha); // 這個半徑決定你想要多大的擴散面積 canvas.drawCircle(getWidth() / 2, getHeight() / 2, startWidth + 50, paint); // 同心圓擴散 if (isStarting && alpha > 0 && startWidth < maxWidth) { alphaList.set(i, (alpha - 1) + ""); startWidthList.set(i, (startWidth + 1) + ""); } } if (isStarting && Integer .parseInt(startWidthList.get(startWidthList.size() - 1)) == maxWidth / 5) { alphaList.add("255"); startWidthList.add("0"); } // 同心圓數量達到10個,刪除最外層圓 if (isStarting && startWidthList.size() == 10) { startWidthList.remove(0); alphaList.remove(0); } // 刷新界面 invalidate(); } // 執行動畫 public void start() { isStarting = true; } // 停止動畫 public void stop() { isStarting = false; } // 判斷是都在不在執行 public boolean isStarting() { return isStarting; } } ~~~ > 這里我們看到,對外有幾個方法,一個開始動畫,一個停止動畫,一個檢測是否正在運行 ## MainActivity > 這里就是我們的需求了,我反編譯了一下支付寶的APK,并沒有找到他的咻一咻的音效,就在他的raw目錄下隨便找了一個,我們現在是需要這樣一個需求 * 點擊圖片執行動畫,并且每隔五分鐘響一次 * 再次點擊圖片,停止動畫,停止音效 我們先新建一個raw文件夾把音效拷貝進去吧 ~~~ package com.lgl.whew; import android.app.Activity; import android.media.AudioManager; import android.media.SoundPool; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.view.View.OnClickListener; public class MainActivity extends Activity { private WhewView wv; private RoundImageView my_photo; private static final int Nou = 1; // 聲明一個SoundPool private SoundPool sp; // 定義一個整型用load();來設置suondIDf private int music; private Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { if (msg.what == Nou) { // 每隔10s響一次 handler.sendEmptyMessageDelayed(Nou, 5000); sp.play(music, 1, 1, 0, 0, 1); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { // 第一個參數為同時播放數據流的最大個數,第二數據流類型,第三為聲音質量 sp = new SoundPool(10, AudioManager.STREAM_SYSTEM, 5); // 把你的聲音素材放到res/raw里,第2個參數即為資源文件,第3個為音樂的優先級 music = sp.load(this, R.raw.hongbao_gq, 1); wv = (WhewView) findViewById(R.id.wv); my_photo = (RoundImageView) findViewById(R.id.my_photo); my_photo.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if(wv.isStarting()){ //如果動畫正在運行就停止,否則就繼續執行 wv.stop(); //結束進程 handler.removeMessages(Nou); }else{ // 執行動畫 wv.start(); handler.sendEmptyMessage(Nou); } } }); } } ~~~ > 相信這里的邏輯不是很難吧,對了,我們在結束activity的時候也是要銷毀這個進程的,不然…你懂的 ~~~ @Override protected void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); handler.removeMessages(Nou); } ~~~ 我們運行一下,想聽效果的可以下載Demo運行一下,我們這里做一個簡單的演示 ![](https://box.kancloud.cn/2016-02-24_56cd2c1bdcdf9.jpg) ## Demo下載地址:[http://download.csdn.net/detail/qq_26787115/9437957](http://download.csdn.net/detail/qq_26787115/9437957)
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                              哎呀哎呀视频在线观看