Android 自定义view仿微信相机单击拍照长按录视频按钮

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Android仿微信相机的拍照按钮单击拍照，长按录视频。先上效果图。

这里写图片描述

项目地址：https://github.com/c786909486/PhotoButton2/tree/v1.0

添加依赖

allprojects {
    repositories {
      ...
      maven { url 'https://jitpack.io' }
    }
  }

dependencies {
      compile compile 'com.github.c786909486:PhotoButton2:v1.1'
  }

长按效果分析

判断是否为长按，如果是，则扩大外圆，缩小内圆。由于要扩大外圆，所以在绘制常态的外圆时不可将圆的直径设置为view的宽度或高度。

outRoundPaint.setAntiAlias(true);
    outRoundPaint.setColor(outCircleColor);
    if (isLongClick){
      canvas.scale(1.2f,1.2f,width/2,height/2);
    }
    canvas.drawCircle(width/2,height/2, outRaduis, outRoundPaint);

if (isLongClick){
      canvas.drawCircle(width/2,height/2, innerRaduis /2.0f, innerRoundPaint);
      //画外原环
      mCPaint.setAntiAlias(true);
      mCPaint.setColor(progressColor);
      mCPaint.setStyle(Paint.Style.STROKE);
      mCPaint.setStrokeWidth(circleWidth/2);
      RectF rectF = new RectF(0+circleWidth,0+circleWidth,width-circleWidth,height-circleWidth);
      canvas.drawArc(rectF,startAngle,mSweepAngle,false,mCPaint);
    }else {
      canvas.drawCircle(width/2,height/2, innerRaduis, innerRoundPaint);
    }

然后通过手势识别判断单击、长按、长按抬起。

mDetector = new GestureDetectorCompat(context, new GestureDetector.SimpleOnGestureListener() {
      @Override
      public boolean onSingleTapConfirmed(MotionEvent e) {
        //单击
        isLongClick = false;
        if (listener != null) {
          listener.onClick(TakePhotoButton.this);
        }
        return super.onSingleTapConfirmed(e);
      }
      @Override
      public void onLongPress(MotionEvent e) {
        //长按
        isLongClick = true;
        postInvalidate();
        if (listener != null) {
          listener.onLongClick(TakePhotoButton.this);
        }
      }
    });
    mDetector.setIsLongpressEnabled(true);

 @Override
  public boolean onTouchEvent(MotionEvent event) {
    mDetector.onTouchEvent(event);
    switch(MotionEventCompat.getActionMasked(event)) {
      case MotionEvent.ACTION_DOWN:
        isLongClick = false;
        break;
      case MotionEvent.ACTION_UP:
      case MotionEvent.ACTION_CANCEL:
        if (isLongClick) {
          isLongClick = false;
          postInvalidate();
          if (this.listener != null) {
            this.listener.onLongClickUp(this);
          }
        }
        break;
    }
    return true;
  }

自定义接口对各个状态进行监听

public interface OnProgressTouchListener {
    /**
     * 单击
     * @param photoButton
     */
    void onClick(TakePhotoButton photoButton);
    /**
     * 长按
     * @param photoButton
     */
    void onLongClick(TakePhotoButton photoButton);
    /**
     * 长按抬起
     * @param photoButton
     */
    void onLongClickUp(TakePhotoButton photoButton);
    void onFinish();
  }

最后，给外圆弧添加动画

public void start() {
    ValueAnimator animator = ValueAnimator.ofFloat(mmSweepAngleStart, mmSweepAngleEnd);
    animator.setInterpolator(new LinearInterpolator());
    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
      @Override
      public void onAnimationUpdate(ValueAnimator valueAnimator) {
        mSweepAngle = (float) valueAnimator.getAnimatedValue();
        //获取到需要绘制的角度，重新绘制
        invalidate();
      }
    });
    //这里是时间获取和赋值
    ValueAnimator animator1 = ValueAnimator.ofInt(mLoadingTime, 0);
    animator1.setInterpolator(new LinearInterpolator());
    animator1.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
      @Override
      public void onAnimationUpdate(ValueAnimator valueAnimator) {
        int time = (int) valueAnimator.getAnimatedValue();
      }
    });
    AnimatorSet set = new AnimatorSet();
    set.playTogether(animator, animator1);
    set.setDuration(mLoadingTime * 1000);
    set.setInterpolator(new LinearInterpolator());
    set.start();
    set.addListener(new AnimatorListenerAdapter() {
      @Override
      public void onAnimationEnd(Animator animation) {
        super.onAnimationEnd(animation);
        clearAnimation();
        isLongClick = false;
        postInvalidate();
        if (listener != null) {
          listener.onFinish();
        }
      }
    });
  }

最后，在activity中给控件设置监听即可。

buttontake.setOnProgressTouchListener(new TakePhotoButton.OnProgressTouchListener() {
      @Override
      public void onClick(TakePhotoButton photoButton) {
        Toast.makeText(MainActivity.this,"单机",Toast.LENGTH_SHORT).show();
      }
      @Override
      public void onLongClick(TakePhotoButton photoButton) {
        Toast.makeText(MainActivity.this,"长按",Toast.LENGTH_SHORT).show();
        buttontake.start();
      }
      @Override
      public void onLongClickUp(TakePhotoButton photoButton) {
        onFinish();
      }
      @Override
      public void onFinish() {
        Toast.makeText(MainActivity.this,"录制结束",Toast.LENGTH_SHORT).show();
      }
    });

button.s

下面贴上完整的代码

TakePhotoButton：

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.support.annotation.Nullable;
import android.support.v4.view.GestureDetectorCompat;
import android.support.v4.view.MotionEventCompat;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.LinearInterpolator;
/**
 * Created by CKZ on 2017/8/9.
 */
public class TakePhotoButton extends View {
  private float circleWidth;//外圆环宽度
  private int outCircleColor;//外圆颜色
  private int innerCircleColor;//内圆颜色
  private int progressColor;//进度条颜色
  private Paint outRoundPaint = new Paint(); //外圆画笔
  private Paint mCPaint = new Paint();//进度画笔
  private Paint innerRoundPaint = new Paint();
  private float width; //自定义view的宽度
  private float height; //自定义view的高度
  private float outRaduis; //外圆半径
  private float innerRaduis;//内圆半径
  private GestureDetectorCompat mDetector;//手势识别
  private boolean isLongClick;//是否长按
  private float startAngle = -90;//开始角度
  private float mmSweepAngleStart = 0f;//起点
  private float mmSweepAngleEnd = 360f;//终点
  private float mSweepAngle;//扫过的角度
  private int mLoadingTime;
  public TakePhotoButton(Context context) {
    this(context,null);
}
  public TakePhotoButton(Context context, @Nullable AttributeSet attrs) {
    this(context, attrs,0);
  }
  public TakePhotoButton(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init(context,attrs);
  }
  private void init(Context context,AttributeSet attrs){
    TypedArray array = context.obtainStyledAttributes(attrs,R.styleable.TakePhotoButton);
    outCircleColor = array.getColor(R.styleable.TakePhotoButton_outCircleColor,Color.parseColor("#E0E0E0"));
    innerCircleColor = array.getColor(R.styleable.TakePhotoButton_innerCircleColor,Color.WHITE);
    progressColor = array.getColor(R.styleable.TakePhotoButton_readColor,Color.GREEN);
    mLoadingTime = array.getInteger(R.styleable.TakePhotoButton_maxSeconds,10);
    mDetector = new GestureDetectorCompat(context, new GestureDetector.SimpleOnGestureListener() {
      @Override
      public boolean onSingleTapConfirmed(MotionEvent e) {
        //单击
        isLongClick = false;
        if (listener != null) {
          listener.onClick(TakePhotoButton.this);
        }
        return super.onSingleTapConfirmed(e);
      }
      @Override
      public void onLongPress(MotionEvent e) {
        //长按
        isLongClick = true;
        postInvalidate();
        if (listener != null) {
          listener.onLongClick(TakePhotoButton.this);
        }
      }
    });
    mDetector.setIsLongpressEnabled(true);
  }
  private void resetParams() {
    width = getWidth();
    height = getHeight();
    circleWidth = width*0.13f;
    outRaduis = (float) (Math.min(width, height)/2.4);
    innerRaduis = outRaduis -circleWidth;
  }
  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    if (width > height) {
      setMeasuredDimension(height, height);
    } else {
      setMeasuredDimension(width, width);
    }
  }
  @Override
  protected void onDraw(Canvas canvas) {
    resetParams();
    //画外圆
    outRoundPaint.setAntiAlias(true);
    outRoundPaint.setColor(outCircleColor);
    if (isLongClick){
      canvas.scale(1.2f,1.2f,width/2,height/2);
    }
    canvas.drawCircle(width/2,height/2, outRaduis, outRoundPaint);
    //画内圆
    innerRoundPaint.setAntiAlias(true);
    innerRoundPaint.setColor(innerCircleColor);
    if (isLongClick){
      canvas.drawCircle(width/2,height/2, innerRaduis /2.0f, innerRoundPaint);
      //画外原环
      mCPaint.setAntiAlias(true);
      mCPaint.setColor(progressColor);
      mCPaint.setStyle(Paint.Style.STROKE);
      mCPaint.setStrokeWidth(circleWidth/2);
      RectF rectF = new RectF(0+circleWidth,0+circleWidth,width-circleWidth,height-circleWidth);
      canvas.drawArc(rectF,startAngle,mSweepAngle,false,mCPaint);
    }else {
      canvas.drawCircle(width/2,height/2, innerRaduis, innerRoundPaint);
    }
  }
  public void start() {
    ValueAnimator animator = ValueAnimator.ofFloat(mmSweepAngleStart, mmSweepAngleEnd);
    animator.setInterpolator(new LinearInterpolator());
    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
      @Override
      public void onAnimationUpdate(ValueAnimator valueAnimator) {
        mSweepAngle = (float) valueAnimator.getAnimatedValue();
        //获取到需要绘制的角度，重新绘制
        invalidate();
      }
    });
    //这里是时间获取和赋值
    ValueAnimator animator1 = ValueAnimator.ofInt(mLoadingTime, 0);
    animator1.setInterpolator(new LinearInterpolator());
    animator1.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
      @Override
      public void onAnimationUpdate(ValueAnimator valueAnimator) {
        int time = (int) valueAnimator.getAnimatedValue();
      }
    });
    AnimatorSet set = new AnimatorSet();
    set.playTogether(animator, animator1);
    set.setDuration(mLoadingTime * 1000);
    set.setInterpolator(new LinearInterpolator());
    set.start();
    set.addListener(new AnimatorListenerAdapter() {
      @Override
      public void onAnimationEnd(Animator animation) {
        super.onAnimationEnd(animation);
        clearAnimation();
        isLongClick = false;
        postInvalidate();
        if (listener != null) {
          listener.onFinish();
        }
      }
    });
  }
  @Override
  public boolean onTouchEvent(MotionEvent event) {
    mDetector.onTouchEvent(event);
    switch(MotionEventCompat.getActionMasked(event)) {
      case MotionEvent.ACTION_DOWN:
        isLongClick = false;
        break;
      case MotionEvent.ACTION_UP:
      case MotionEvent.ACTION_CANCEL:
        if (isLongClick) {
          isLongClick = false;
          postInvalidate();
          if (this.listener != null) {
            this.listener.onLongClickUp(this);
          }
        }
        break;
    }
    return true;
  }
  private OnProgressTouchListener listener;
  public void setOnProgressTouchListener(OnProgressTouchListener listener) {
    this.listener = listener;
  }
  /**
   * 进度触摸监听
   */
  public interface OnProgressTouchListener {
    /**
     * 单击
     * @param photoButton
     */
    void onClick(TakePhotoButton photoButton);
    /**
     * 长按
     * @param photoButton
     */
    void onLongClick(TakePhotoButton photoButton);
    /**
     * 长按抬起
     * @param photoButton
     */
    void onLongClickUp(TakePhotoButton photoButton);
    void onFinish();
  }
}

项目地址：https://github.com/c786909486/PhotoButton2/tree/v1.0

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