FoucsView.java
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package com.cjt2325.cameralibrary;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import com.cjt2325.cameralibrary.util.ScreenUtils;
/**
* =====================================
* 作 者: 陈嘉桐
* 版 本：1.1.4
* 创建日期：2017/4/26
* 描 述：对焦框
* =====================================
*/
public class FoucsView extends View {
private int size;
private int center_x;
private int center_y;
private int length;
private Paint mPaint;
public FoucsView(Context context) {
this(context, null);
}
public FoucsView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public FoucsView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.size = ScreenUtils.getScreenWidth(context) / 3;
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(0xEE16AE16);
mPaint.setStrokeWidth(4);
mPaint.setStyle(Paint.Style.STROKE);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
center_x = (int) (size / 2.0);
center_y = (int) (size / 2.0);
length = (int) (size / 2.0) - 2;
setMeasuredDimension(size, size);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawRect(center_x - length, center_y - length, center_x + length, center_y + length, mPaint);
canvas.drawLine(2, getHeight() / 2, size / 10, getHeight() / 2, mPaint);
canvas.drawLine(getWidth() - 2, getHeight() / 2, getWidth() - size / 10, getHeight() / 2, mPaint);
canvas.drawLine(getWidth() / 2, 2, getWidth() / 2, size / 10, mPaint);
canvas.drawLine(getWidth() / 2, getHeight() - 2, getWidth() / 2, getHeight() - size / 10, mPaint);
}
}