Android 波浪進度WaveView
剛好有注意到百度外賣以及淘寶個人中心，都用到了類似水波起伏的效果，于是就參照網上的資料然后自己整改，自定義了一個waveView ,原理么，首先就是自定義個 WaveView 繼承 View ,然后再WaveView 內部實現代碼邏輯：
① 水波就波嘛？ sin函數？ 貝塞爾曲線？ 都行，這里就用二階貝塞 爾曲線去畫吧
② 波要動嘛，怎么動呢？線程？ 好吧 這里用了個Handler。
③繪制波首先要找點，那么在onMeasure()里找出需要的點咯，這里就暫時展示一個波段吧，一個波長移動左邊不就沒了？OK 那就兩個波吧，吼吼，兩個波（猥瑣男潛質表露無遺啊）。接下來就是Handler 結合 onDraw()繪制。OK，那就先看我Word繪制的粗癟的波動圖，請看VCR，oh，no... gif
wave.gif
意思就是波平移一個波長之后回到初始位置繼續平移循環。
好吧，有人說了，這么簡單的邏輯你要啰嗦那么多？？？
好吧，我承認，我有唐僧的潛質。。。
閑話就不說了，先上
效果圖
waveprogress.gif
調用的Activity
* Created by LiuDong on 2016/12/22.
* Email:15002102128@126.com
*/
public class WaveActivity extends Activity {
LD_WaveView waveView;//方形
LD_WaveView waveCircleView;//圓形
private int progrees=0;//進度
private Handler mHandler=new Handler(){
@Override
public void handleMessage(Message msg) {
if (progrees==100) progrees=0;
Log.i("progress",progrees+"");
waveView.setmProgress(progrees++);
waveCircleView.setmProgress(progrees++);
mHandler.sendEmptyMessageDelayed(0,100);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_wave);
waveView= (LD_WaveView) findViewById(R.id.waveView);
waveCircleView= (LD_WaveView) findViewById(R.id.waveViewCircle);
mHandler.sendEmptyMessageDelayed(0,10);
}
}
xml布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" android:layout_width="match_parent"
android:background="@color/ld_White"
android:layout_height="match_parent">
<com.dadong.ld_tools.widget.LD_WaveView
android:id="@+id/waveViewCircle"
android:layout_marginTop="20dp"
android:layout_width="100dp"
android:layout_centerHorizontal="true"
android:layout_height="100dp"
app:wave_color="@color/ld_Black"
app:wave_circle="true"
/>
<com.dadong.ld_tools.widget.LD_WaveView
android:id="@+id/waveView"
android:layout_width="100dp"
android:layout_height="100dp"
app:wave_color="@color/ld_Black"
app:wave_circle="false"
android:layout_centerInParent="true" />
</RelativeLayout>
自定義WaveView
/**
* Created by LiuDong on 2016/12/23.
* Email:15002102128@126.com
*/
public class LD_WaveView extends View {
private int mProgress;//進度
private int mTimeStep = 10;//時間間隔
private int mSpeed = 5;//波單次移動的距離
private int mViewHeight;//視圖寬高
private int mViewWidth;//視圖寬度
private int mLevelLine;// 基準線
private int mWaveLength;//波長 暫定view寬度為一個波長
private int mStrokeWidth;//園的線寬
private RectF rectF;//圓環區域
private int mWaveHeight;//波峰高度
private int mLeftWaveMoveLength;//波平移的距離，用來控制波的起點位置
private int mWaveColor;//波的顏色
private Paint mPaint;//畫筆
private Paint mCirclePaint;//圓環畫筆
private Paint mBorderPaint;//邊界畫筆
private int mBorderWidth=4;//邊界寬度
private Paint mTextPaint;//文字畫筆
private Path mPath;//繪畫線
private List<Point> mPoints;//點的集合
private boolean isMeasure = false;//是否已測量過
private boolean isCircle=false;//是否圓形默認false，可屬性代碼設置
//處理消息
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
initWaveMove();
}
};
/**
* 初始化波的移動
*/
private void initWaveMove(){
mLeftWaveMoveLength+=mSpeed;//波向右移動距離增加mSpeed;
if (mLeftWaveMoveLength>=mWaveLength){//當增加到一個波長時回復到0
mLeftWaveMoveLength=0;
}
invalidate();
}
public LD_WaveView(Context context) {
this(context, null);
}
public LD_WaveView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public LD_WaveView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
getAttr(context, attrs, defStyleAttr);
init();
}
/**
* 初始化畫筆
*/
private void init() {
mPoints = new ArrayList<Point>();
//波浪軌跡畫筆
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setColor(mWaveColor);
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPath = new Path();
//文字畫筆
mTextPaint=new Paint();
mTextPaint.setColor(Color.RED);
mTextPaint.setTextAlign(Paint.Align.CENTER);
mTextPaint.setTextSize(48);
//圓環畫筆
mCirclePaint=new Paint();
mCirclePaint.setAntiAlias(true);
mCirclePaint.setColor(Color.WHITE);
mCirclePaint.setStyle(Paint.Style.STROKE);
//邊界線畫筆
mBorderPaint=new Paint();
mBorderPaint.setAntiAlias(true);
mBorderPaint.setColor(mWaveColor);
mBorderPaint.setStrokeWidth(mBorderWidth);
mBorderPaint.setStyle(Paint.Style.STROKE);
}
/**
* 獲取自定義的屬性值
*
* @param attrs
*/
private void getAttr(Context context, AttributeSet attrs, int defStyle) {
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.LD_WaveView, defStyle, 0);
mWaveColor = a.getColor(R.styleable.LD_WaveView_wave_color, Color.RED);
isCircle=a.getBoolean(R.styleable.LD_WaveView_wave_circle,false);
a.recycle();
}
/**
*
* @param widthMeasureSpec
* @param heightMeasureSpec
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (!isMeasure&&Math.abs(getMeasuredHeight()-getMeasuredWidth())<50) {//只計算一次就夠了 ，relativelayout的時候要繪制兩次 加個寬高判斷
mViewHeight = getMeasuredHeight();
mViewWidth = getMeasuredWidth();
mLevelLine = mViewHeight; //初始化波的準位線 起始位視圖最底部
{
mLevelLine = mViewHeight * (100-mProgress) / 100;
if (mLevelLine < 0) mLevelLine = 0;
}
//計算波峰值
mWaveHeight = mViewHeight / 20;//波峰暫定為view高度的1/20，如果需要設置 可設置set方法賦值;
mWaveLength = getMeasuredWidth();
//計算所有的點 這里取寬度為整個波長 往左再延伸一個波長 兩個波長則需要9個點
for (int i = 0; i < 9; i++) {
int y = 0;
switch (i % 4) {
case 0:
y = mViewHeight;
break;
case 1:
y =mViewHeight+ mWaveHeight;
break;
case 2:
y = mViewHeight;
break;
case 3:
y = mViewHeight-mWaveHeight;
break;
}
Point point = new Point(-mWaveLength + i * mWaveLength / 4, y);
mPoints.add(point);
}
/**
* 計算圓環寬度
*/
int mIncircleRadius=mViewHeight<mViewWidth?mViewHeight/2:mViewWidth/2;//內切圓半徑
int mcircumcircleRadius= (int) (Math.sqrt((float)(Math.pow(mViewHeight/2,2)+Math.pow(mViewWidth/2,2)))+0.5);//外接圓半徑
int radius=mcircumcircleRadius/2+mIncircleRadius/2;
rectF=new RectF(mViewWidth/2-radius,mViewHeight/2-radius,mViewWidth/2+radius,mViewHeight/2+radius);
mStrokeWidth=mcircumcircleRadius-mIncircleRadius;
mCirclePaint.setStrokeWidth(mStrokeWidth);//線是有寬度的 采用了這種方式畫圓環
isMeasure = true;
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
/**
* 繪制線條
*/
mPath.reset();
int i = 0;
mPath.moveTo(mPoints.get(0).getX()+mLeftWaveMoveLength, mPoints.get(0).getY()-mViewHeight*mProgress/100);
for (; i < mPoints.size() - 2; i += 2) {
mPath.quadTo(mPoints.get(i + 1).getX()+mLeftWaveMoveLength, mPoints.get(i + 1).getY()-mViewHeight*mProgress/100, mPoints.get(i + 2).getX()+mLeftWaveMoveLength, mPoints.get(i + 2).getY()-mViewHeight*mProgress/100);
}
mPath.lineTo(mPoints.get(i).getX()+mLeftWaveMoveLength, mViewHeight);
mPath.lineTo(mPoints.get(0).getX()+mLeftWaveMoveLength, mViewHeight);
mPath.close();
/**
* 繪制軌跡
*/
canvas.drawPath(mPath,mPaint);
Rect rect = new Rect();
String progress=String.format("%d%%",mProgress);
mTextPaint.getTextBounds(progress,0,progress.length(), rect);
int textHeight = rect.height();
if (mProgress>=50)//如果進度達到50 顏色變為白色，沒辦法啊，進度在中間 不變顏色看不到
mTextPaint.setColor(Color.WHITE);
else
mTextPaint.setColor(mWaveColor);
canvas.drawText(progress,0,progress.length(),mViewWidth/2,mViewHeight/2+textHeight/2,mTextPaint);
if (isCircle) {
/**
* 繪制圓環
*/
canvas.drawArc(rectF, 0, 360, true, mCirclePaint);
Paint circlePaint = new Paint();
circlePaint.setStrokeWidth(5);
circlePaint.setColor(Color.WHITE);
circlePaint.setAntiAlias(true);
circlePaint.setStyle(Paint.Style.STROKE);
canvas.drawCircle(mViewWidth / 2, mViewHeight / 2, mViewHeight / 2, circlePaint);
/**
* 繪制邊界
*/
mBorderPaint.setStrokeWidth(mBorderWidth/2);
canvas.drawCircle(mViewWidth/2,mViewHeight/2,mViewHeight/2-mBorderWidth/2,mBorderPaint);
}else {
/**
* 繪制矩形邊框
*/
canvas.drawRect(0,0,mViewWidth,mViewHeight,mBorderPaint);
}
//
handler.sendEmptyMessageDelayed(0,mTimeStep);
}
/**
* 設置進度 基準線
* @param mProgress
*/
public void setmProgress(int mProgress) {
this.mProgress = mProgress;
mLevelLine=(100-mProgress)*mViewHeight/100;
}
/**
* 設置是否為圓形
* @param circle
*/
public void setCircle(boolean circle) {
isCircle = circle;
}
}
自定義屬性
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="LD_WaveView">
<attr name="wave_color" format="color"></attr>
<attr name="wave_circle" format="boolean"></attr>
</declare-styleable>
</resources>
OK，沒了，代碼里備注應該還算比較清楚了，希望能對一些人有一些幫助,瑕疵不足之處歡迎指正，或者有好的建議。
來自：http://www.jianshu.com/p/2384ccba5dc3
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