package com.zzw.qunyingzhuan2;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.LinearGradient;

import android.graphics.Paint;

import android.graphics.Shader;

import android.util.AttributeSet;

import android.view.View;

/**

 * Created by zzw on 2016/7/11.

 * 描述:

 */

public class VoiceBarView extends View {

    private int mRectCount = 10;

    private int offset = 20;

    private int mWidth;

    private int mRectHeight;

    private int mRectWidth;

    private LinearGradient mLinearGradient;

    private Paint paint;

    public VoiceBarView(Context context) {

        this(context, null);

    }

    public VoiceBarView(Context context, AttributeSet attrs, int defStyleAttr) {

        super(context, attrs, defStyleAttr);

        paint = new Paint();

        paint.setAntiAlias(true);

        paint.setStyle(Paint.Style.FILL);

        paint.setColor(Color.GRAY);

    }

    public VoiceBarView(Context context, AttributeSet attrs) {

        this(context, attrs, 0);

    }

    @Override

    protected void onDraw(Canvas canvas) {

        super.onDraw(canvas);

        for (int i = 0; i < mRectCount; i++) {

            float currentHeight = (float) (Math.random() * mRectHeight);

            float left = (float) (mWidth * 0.2 + mRectWidth * i + offset);

            float top = currentHeight;

            float right = (float) (mWidth * 0.2 + mRectWidth * (i + 1));

//            float right = left + mRectWidth;

            float bottom = mRectHeight;

            canvas.drawRect(left, top, right, bottom, paint);

        }

        postInvalidateDelayed(300);

    }

    @Override

    protected void onSizeChanged(int w, int h, int oldw, int oldh) {

        super.onSizeChanged(w, h, oldw, oldh);

        mWidth = getWidth();

        mRectHeight = getHeight();

        mRectWidth = (int) (mWidth * 0.6 / mRectCount);

        mLinearGradient = new LinearGradient(0, 0, mRectWidth, mRectHeight, Color.YELLOW, Color.BLUE, Shader.TileMode.CLAMP);

        paint.setShader(mLinearGradient);

    }

}