水波浪進度框

 

原文地址

 

首先自定義一個View

public class WaveView extends View {

    private static final float DEFAULT_AMPLITUDE_RATIO = 0.05f;
    private static final float DEFAULT_WATER_LEVEL_RATIO = 0.5f;
    private static final float DEFAULT_WAVE_LENGTH_RATIO = 1.0f;
    private static final float DEFAULT_WAVE_SHIFT_RATIO = 0.0f;

    public static final int DEFAULT_BEHIND_WAVE_COLOR = Color.parseColor("#28FFFFFF");
    public static final int DEFAULT_FRONT_WAVE_COLOR = Color.parseColor("#3CFFFFFF");
    public static final ShapeType DEFAULT_WAVE_SHAPE = ShapeType.CIRCLE;
    private boolean showBehindLine = true;

    public enum ShapeType {
        CIRCLE,
        SQUARE
    }

    // if true, the shader will display the wave
    private boolean mShowWave;

    // shader containing repeated waves
    private BitmapShader mWaveShader;
    // shader matrix
    private Matrix mShaderMatrix;
    // paint to draw wave
    private Paint mViewPaint;
    // paint to draw border
    private Paint mBorderPaint;//邊界畫筆
    // paint to draw backgroup
    private Paint mBgPaint; //背景畫筆

    private float mDefaultAmplitude;
    private float mDefaultWaterLevel;
    private float mDefaultWaveLength;
    private double mDefaultAngularFrequency;

    private float mAmplitudeRatio = DEFAULT_AMPLITUDE_RATIO;
    private float mWaveLengthRatio = DEFAULT_WAVE_LENGTH_RATIO;
    private float mWaterLevelRatio = DEFAULT_WATER_LEVEL_RATIO;
    private float mWaveShiftRatio = DEFAULT_WAVE_SHIFT_RATIO;

    private int mBehindWaveColor = DEFAULT_BEHIND_WAVE_COLOR;
    private int mFrontWaveColor = DEFAULT_FRONT_WAVE_COLOR;
    private ShapeType mShapeType = DEFAULT_WAVE_SHAPE;

    public WaveView(Context context) {
        super(context);
        init();
    }

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

    public WaveView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        mShaderMatrix = new Matrix();
        mViewPaint = new Paint();
        mViewPaint.setAntiAlias(true);
        mBgPaint = new Paint();
        mBgPaint.setAntiAlias(true);
        /**默認背景色---淡黃色*/
        mBgPaint.setColor(0xffffd983);
    }

    public float getWaveShiftRatio() {
        return mWaveShiftRatio;
    }

    /**
     * Shift the wave horizontally according to <code>waveShiftRatio</code>.
     *
     * @param waveShiftRatio Should be 0 ~ 1. Default to be 0.
     *                       <br/>Result of waveShiftRatio multiples width of WaveView is the length to shift.
     */
    public void setWaveShiftRatio(float waveShiftRatio) {
        if (mWaveShiftRatio != waveShiftRatio) {
            mWaveShiftRatio = waveShiftRatio;
            invalidate();
        }
    }

    public float getWaterLevelRatio() {
        return mWaterLevelRatio;
    }

    /**
     * Set water level according to <code>waterLevelRatio</code>.
     *
     * @param waterLevelRatio Should be 0 ~ 1. Default to be 0.5.
     *                        <br/>Ratio of water level to WaveView height.
     */
    public void setWaterLevelRatio(float waterLevelRatio) {
        if (mWaterLevelRatio != waterLevelRatio) {
            mWaterLevelRatio = waterLevelRatio;
            invalidate();
        }
    }

    public float getAmplitudeRatio() {
        return mAmplitudeRatio;
    }

    /**
     * Set vertical size of wave according to <code>amplitudeRatio</code>
     *
     * @param amplitudeRatio Default to be 0.05. Result of amplitudeRatio + waterLevelRatio should be less than 1.
     *                       <br/>Ratio of amplitude to height of WaveView.
     */
    public void setAmplitudeRatio(float amplitudeRatio) {
        if (mAmplitudeRatio != amplitudeRatio) {
            mAmplitudeRatio = amplitudeRatio;
            invalidate();
        }
    }

    public float getWaveLengthRatio() {
        return mWaveLengthRatio;
    }

    /**
     * Set horizontal size of wave according to <code>waveLengthRatio</code>
     *
     * @param waveLengthRatio Default to be 1.
     *                        <br/>Ratio of wave length to width of WaveView.
     */
    public void setWaveLengthRatio(float waveLengthRatio) {
        mWaveLengthRatio = waveLengthRatio;
    }

    public boolean isShowWave() {
        return mShowWave;
    }

    public void setShowWave(boolean showWave) {
        mShowWave = showWave;
    }

    public void setBorder(int width, int color) {
        if (mBorderPaint == null) {
            mBorderPaint = new Paint();
            mBorderPaint.setAntiAlias(true);
            mBorderPaint.setStyle(Paint.Style.STROKE);
        }
        mBorderPaint.setColor(color);
        mBorderPaint.setStrokeWidth(width);

        invalidate();
    }

    public void setWaveColor(int behindWaveColor, int frontWaveColor) {
        mBehindWaveColor = behindWaveColor;
        mFrontWaveColor = frontWaveColor;

        if (getWidth() > 0 && getHeight() > 0) {
            // need to recreate shader when color changed
            mWaveShader = null;
            createShader();
            invalidate();
        }
    }

    public void setShapeType(ShapeType shapeType) {
        mShapeType = shapeType;
        invalidate();
    }

    public void setShowBehindLine(boolean showBehindLine){
        this.showBehindLine = showBehindLine;
        invalidate();
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        createShader();
    }

    /**
     * Create the shader with default waves which repeat horizontally, and clamp vertically
     */
    private void createShader() {
        mDefaultAngularFrequency = 2.0f * Math.PI / DEFAULT_WAVE_LENGTH_RATIO / getWidth();
        mDefaultAmplitude = getHeight() * DEFAULT_AMPLITUDE_RATIO;
        mDefaultWaterLevel = getHeight() * DEFAULT_WATER_LEVEL_RATIO;
        mDefaultWaveLength = getWidth();

        Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);

        Paint wavePaint = new Paint();
        wavePaint.setStrokeWidth(2);
        wavePaint.setAntiAlias(true);

        // Draw default waves into the bitmap
        // y=Asin(ωx+φ)+h
        final int endX = getWidth() + 1;
        final int endY = getHeight() + 1;

        float[] waveY = new float[endX];

        wavePaint.setColor(mBehindWaveColor);
        for (int beginX = 0; beginX < endX; beginX++) {
            double wx = beginX * mDefaultAngularFrequency;
            float beginY = (float) (mDefaultWaterLevel + mDefaultAmplitude * Math.sin(wx));
            if(showBehindLine){
                canvas.drawLine(beginX, beginY, beginX, endY, wavePaint);
            }
            waveY[beginX] = beginY;
        }

        wavePaint.setColor(mFrontWaveColor);
        final int wave2Shift = (int) (mDefaultWaveLength / 4);
        for (int beginX = 0; beginX < endX; beginX++) {
            canvas.drawLine(beginX, waveY[(beginX + wave2Shift) % endX], beginX, endY, wavePaint);
        }

        // use the bitamp to create the shader
        mWaveShader = new BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.CLAMP);
        mViewPaint.setShader(mWaveShader);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        // modify paint shader according to mShowWave state
        if (mShowWave && mWaveShader != null) {
            // first call after mShowWave, assign it to our paint
            if (mViewPaint.getShader() == null) {
                mViewPaint.setShader(mWaveShader);
            }

            // sacle shader according to mWaveLengthRatio and mAmplitudeRatio
            // this decides the size(mWaveLengthRatio for width, mAmplitudeRatio for height) of waves
            mShaderMatrix.setScale(
                    mWaveLengthRatio / DEFAULT_WAVE_LENGTH_RATIO,
                    mAmplitudeRatio / DEFAULT_AMPLITUDE_RATIO,
                    0,
                    mDefaultWaterLevel);
            // translate shader according to mWaveShiftRatio and mWaterLevelRatio
            // this decides the start position(mWaveShiftRatio for x, mWaterLevelRatio for y) of waves
            mShaderMatrix.postTranslate(
                    mWaveShiftRatio * getWidth(),
                    (DEFAULT_WATER_LEVEL_RATIO - mWaterLevelRatio) * getHeight());

            // assign matrix to invalidate the shader
            mWaveShader.setLocalMatrix(mShaderMatrix);

            float borderWidth = mBorderPaint == null ? 0f : mBorderPaint.getStrokeWidth();
            switch (mShapeType) {
                case CIRCLE:
                    if (borderWidth > 0) {
                        canvas.drawCircle(getWidth() / 2f, getHeight() / 2f,
                                (getWidth() - borderWidth) / 2f - 1f, mBorderPaint);
                    }
                    float radius = getWidth() / 2f - borderWidth;
                    canvas.drawCircle(getWidth() / 2f, getHeight() / 2f, radius, mBgPaint);
                    canvas.drawCircle(getWidth() / 2f, getHeight() / 2f, radius, mViewPaint);
                    break;
                case SQUARE:
                    if (borderWidth > 0) {
                        canvas.drawRect(
                                borderWidth / 2f,
                                borderWidth / 2f,
                                getWidth() - borderWidth / 2f - 0.5f,
                                getHeight() - borderWidth / 2f - 0.5f,
                                mBorderPaint);
                    }
                    canvas.drawRect(borderWidth, borderWidth, getWidth() - borderWidth,
                            getHeight() - borderWidth, mViewPaint);
                    break;
            }
        } else {
            mViewPaint.setShader(null);
        }
    }
}

接下來自定義一個類，進行動態設置

public class WaveHelper {
    private WaveView mWaveView;

    private AnimatorSet mAnimatorSet;

    public WaveHelper(WaveView waveView) {
        mWaveView = waveView;
        initAnimation();
    }

    public void start() {
        mWaveView.setShowWave(true);
        if (mAnimatorSet != null) {
            mAnimatorSet.start();
        }
    }

    private void initAnimation() {
        List<Animator> animators = new ArrayList<>();

        // horizontal animation.
        // wave waves infinitely.
        ObjectAnimator waveShiftAnim = ObjectAnimator.ofFloat(
                mWaveView, "waveShiftRatio", 0f, 1f);
        waveShiftAnim.setRepeatCount(ValueAnimator.INFINITE);
        waveShiftAnim.setDuration(1000);
        waveShiftAnim.setInterpolator(new LinearInterpolator());
        animators.add(waveShiftAnim);

        // vertical animation.
        // water level increases from 0 to center of WaveView
//        ObjectAnimator waterLevelAnim = ObjectAnimator.ofFloat(
//                mWaveView, "waterLevelRatio", 0f, 0.5f);
//        waterLevelAnim.setDuration(10000);
//        waterLevelAnim.setInterpolator(new DecelerateInterpolator());
//        animators.add(waterLevelAnim);

        // amplitude animation.
        // wave grows big then grows small, repeatedly
        ObjectAnimator amplitudeAnim = ObjectAnimator.ofFloat(
                mWaveView, "amplitudeRatio", 0.0001f, 0.05f);
        amplitudeAnim.setRepeatCount(ValueAnimator.INFINITE);
        amplitudeAnim.setRepeatMode(ValueAnimator.REVERSE);
        amplitudeAnim.setDuration(5000);
        amplitudeAnim.setInterpolator(new LinearInterpolator());
        animators.add(amplitudeAnim);

        mAnimatorSet = new AnimatorSet();
        mAnimatorSet.playTogether(animators);
    }

    public void cancel() {
        if (mAnimatorSet != null) {
//            mAnimatorSet.cancel();
            mAnimatorSet.end();
        }
    }
}

接下來就能夠直接使用了，XML的佈局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <com.guorentong.learn.myapplication.WaveView
        android:id="@+id/wave"
        android:layout_width="200dp"
        android:layout_height="200dp" />
    <TextView
        android:id="@+id/tv_progress_point"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="50dp"
        android:textColor="#ffffff"
        android:textSize="13sp"
        android:textStyle="bold"
        android:visibility="visible"/>

</LinearLayout>

MainActivity中代碼以下：

public class MainActivity extends AppCompatActivity {


    private WaveView mWaveView;
    private WaveHelper mWaveHelper;
    private TextView mTvProgressPoint; //  可根據後臺返回值來獲取，這裏我本身設置的值
    private float progress_point = 35; //進度    可根據後臺返回值來獲取，這裏我本身設置的值

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mWaveView = (WaveView) findViewById(R.id.wave);
        mWaveView.setShapeType(WaveView.ShapeType.CIRCLE);
        /**繪製邊界線的寬及顏色，不須要的能夠註銷，此處默認寬4，白色*/
        mWaveView.setBorder((int) getResources().getDimension(R.dimen.wave_border), 0xffffffff);
        /**是否顯示雙線*/
        mWaveView.setShowBehindLine(true);
        mWaveView.setWaveColor(
                Color.parseColor("#fff7bfc0"),//波浪線上（淡紫色）setShowBehindLine爲true時顯示,false不顯示
                Color.parseColor("#fffeab2f"));//波浪線下（橘黃色）
        mWaveHelper = new WaveHelper(mWaveView);
        mWaveView.setWaterLevelRatio(0.0F);
        mWaveView.setWaterLevelRatio(progress_point/100F);
        mWaveHelper.start();

        mTvProgressPoint = (TextView) findViewById(R.id.tv_progress_point);
        mTvProgressPoint.setText("42.56%");

    }
}

上面講到的3種效果圖能夠直接在代碼中設置，須要哪一個寫那個方法，不須要的就不用寫。

進度值 和 百分比我這裏是寫死的，你們能夠根據後臺返回的值來動態設置。

裏面的setBorder方法須要的是2個參數，一個int類型，一個顏色值。

wava_border路徑在values文件下的dimends中： 

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <dimen name="wave_border">4dp</dimen>
</resources>