该楼层疑似违规已被系统折叠 隐藏此楼查看此楼

一、CustomImageView插件

package com.open_open.android_plantest;

import android.content.Context;

import android.content.res.TypedArray;

import android.graphics.Bitmap;

import android.graphics.Bitmap.Config;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.PorterDuff;

import android.graphics.PorterDuffXfermode;

import android.graphics.RectF;

import android.util.AttributeSet;

import android.util.TypedValue;

import android.view.View;

/**

* 自定义View，实现圆角，圆形等效果

*

* @author zhy

*

*/

public class CustomImageView extends View

{

/**

* TYPE_CIRCLE / TYPE_ROUND

*/

private int type;

private static final int TYPE_CIRCLE = 0;

private static final int TYPE_ROUND = 1;

/**

* 图片

*/

private Bitmap mSrc;

/**

* 圆角的大小

*/

private int mRadius;

/**

* 控件的宽度

*/

private int mWidth;

/**

* 控件的高度

*/

private int mHeight;

public CustomImageView(Context context, AttributeSet attrs)

{

this(context, attrs, 0);

}

public CustomImageView(Context context)

{

this(context, null);

}

/**

* 初始化一些自定义的参数

*

* @param context

* @param attrs

* @param defStyle

*/

public CustomImageView(Context context, AttributeSet attrs, int defStyle)

{

super(context, attrs, defStyle);

TypedArray a = context.getTheme().obtainStyledAttributes(attrs,

R.styleable.CustomImageView, defStyle, 0);

int n = a.getIndexCount();

for (int i = 0; i < n; i++)

{

int attr = a.getIndex(i);

switch (attr)

{

case R.styleable.CustomImageView_src:

mSrc = BitmapFactory.decodeResource(getResources(),

a.getResourceId(attr, 0));

break;

case R.styleable.CustomImageView_type:

type = a.getInt(attr, 0);// 默认为Circle

break;

case R.styleable.CustomImageView_borderRadius:

mRadius = a.getDimensionPixelSize(attr, (int) TypedValue

.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 10f,

getResources().getDisplayMetrics()));// 默认为10DP

break;

}

}

a.recycle();

}

/**

* 计算控件的高度和宽度

*/

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)

{

// super.onMeasure(widthMeasureSpec, heightMeasureSpec);

/**

* 设置宽度

*/

int specMode = MeasureSpec.getMode(widthMeasureSpec);

int specSize = MeasureSpec.getSize(widthMeasureSpec);

if (specMode == MeasureSpec.EXACTLY)// match_parent , accurate

{

mWidth = specSize;

} else

{

// 由图片决定的宽

int desireByImg = getPaddingLeft() + getPaddingRight()

+ mSrc.getWidth();

if (specMode == MeasureSpec.AT_MOST)// wrap_content

{

mWidth = Math.min(desireByImg, specSize);

} else

mWidth = desireByImg;

}

/***

* 设置高度

*/

specMode = MeasureSpec.getMode(heightMeasureSpec);

specSize = MeasureSpec.getSize(heightMeasureSpec);

if (specMode == MeasureSpec.EXACTLY)// match_parent , accurate

{

mHeight = specSize;

} else

{

int desire = getPaddingTop() + getPaddingBottom()

+ mSrc.getHeight();

if (specMode == MeasureSpec.AT_MOST)// wrap_content

{

mHeight = Math.min(desire, specSize);

} else

mHeight = desire;

}

setMeasuredDimension(mWidth, mHeight);

}

/**

* 绘制

*/

@Override

protected void onDraw(Canvas canvas)

{

switch (type)

{

// 如果是TYPE_CIRCLE绘制圆形

case TYPE_CIRCLE:

int min = Math.min(mWidth, mHeight);

/**

* 长度如果不一致，按小的值进行压缩

*/

mSrc = Bitmap.createScaledBitmap(mSrc, min, min, false);

canvas.drawBitmap(createCircleImage(mSrc, min), 0, 0, null);

break;

case TYPE_ROUND:

canvas.drawBitmap(createRoundConerImage(mSrc), 0, 0, null);

break;

}

}

/**

* 根据原图和变长绘制圆形图片

*

* @param source

* @param min

* @return

*/

private Bitmap createCircleImage(Bitmap source, int min)

{

final Paint paint = new Paint();

paint.setAntiAlias(true);

Bitmap target = Bitmap.createBitmap(min, min, Config.ARGB_8888);

/**

* 产生一个同样大小的画布

*/

Canvas canvas = new Canvas(target);

/**

* 首先绘制圆形

*/

canvas.drawCircle(min / 2, min / 2, min / 2, paint);

/**

* 使用SRC_IN，参考上面的说明

*/

paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));

/**

* 绘制图片

*/

canvas.drawBitmap(source, 0, 0, paint);

return target;

}

/**

* 根据原图添加圆角

*

* @param source

* @return

*/

private Bitmap createRoundConerImage(Bitmap source)

{

final Paint paint = new Paint();

paint.setAntiAlias(true);

Bitmap target = Bitmap.createBitmap(mWidth, mHeight, Config.ARGB_8888);

Canvas canvas = new Canvas(target);

RectF rect = new RectF(0, 0, source.getWidth(), source.getHeight());

canvas.drawRoundRect(rect, mRadius, mRadius, paint);

paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));

canvas.drawBitmap(source, 0, 0, paint);

return target;

}

}