Android 将图片快速转换成圆角的方法

 使用开源项目  RoundedImageView

 github上面的开源项目 官方地址为:  https://github.com/vinc3m1/RoundedImageView 

效果如下:

 下面快速的集成进来

步骤分为3个

1: 去github上下载 工程

  https://github.com/vinc3m1/RoundedImageView  

2: 导入工程

3  在布局中使用它

    <com.makeramen.rounded.RoundedImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentLeft="true"
        android:padding="10dip"
        android:src=http://www.mamicode.com/"@drawable/photo1">




属性的意义:
   makeramen:border_width="2dip"   表示图片的边框宽度为2个dp
 makeramen:  corner_radius表示为  图片转圆角的弧度
     修改    makeramen:corner_radius="100dip"  
        当  corner_radius 设置为100dp 的时候   会呈现为圆形 .   
       (    注:  com.makeramen.rounded.RoundedImageView  控件的宽和高需要相等   )

修改了example中的    rounded_item.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- 
	Copyright (C) 2013 Make Ramen, LLC
-->
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:makeramen="http://schemas.android.com/apk/res/com.makeramen.rounded.example"
    android:layout_width="match_parent"
    android:layout_height="200dip">
    
    <com.makeramen.rounded.RoundedImageView
        android:id="@+id/imageView1"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:padding="10dip"
        android:src=http://www.mamicode.com/"@drawable/photo1">
如下图:


用代码创建 :
RoundedImageView iv = new RoundedImageView(context);
iv.setScaleType(ScaleType.CENTER_CROP);
iv.setCornerRadius(10);
iv.setBorderWidth(2);
iv.setBorderColor(Color.DKGRAY);
iv.setRoundedBackground(true);
iv.setImageDrawable(drawable);
iv.setBackground(backgroundDrawable);
iv.setOval(true);


贴上部分源码:
package com.makeramen;

import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.net.Uri;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.ImageView;

@SuppressWarnings("UnusedDeclaration")
public class RoundedImageView extends ImageView {

  public static final String TAG = "RoundedImageView";
  public static final float DEFAULT_RADIUS = 0f;
  public static final float DEFAULT_BORDER_WIDTH = 0f;
  private static final ScaleType[] SCALE_TYPES = {
      ScaleType.MATRIX,
      ScaleType.FIT_XY,
      ScaleType.FIT_START,
      ScaleType.FIT_CENTER,
      ScaleType.FIT_END,
      ScaleType.CENTER,
      ScaleType.CENTER_CROP,
      ScaleType.CENTER_INSIDE
  };

  private float cornerRadius = DEFAULT_RADIUS;
  private float borderWidth = DEFAULT_BORDER_WIDTH;
  private ColorStateList borderColor =
      ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR);
  private boolean isOval = false;
  private boolean mutateBackground = false;

  private int mResource;
  private Drawable mDrawable;
  private Drawable mBackgroundDrawable;

  private ScaleType mScaleType;

  public RoundedImageView(Context context) {
    super(context);
  }

  public RoundedImageView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public RoundedImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundedImageView, defStyle, 0);

    int index = a.getInt(R.styleable.RoundedImageView_android_scaleType, -1);
    if (index >= 0) {
      setScaleType(SCALE_TYPES[index]);
    } else {
      // default scaletype to FIT_CENTER
      setScaleType(ScaleType.FIT_CENTER);
    }

    cornerRadius = a.getDimensionPixelSize(R.styleable.RoundedImageView_corner_radius, -1);
    borderWidth = a.getDimensionPixelSize(R.styleable.RoundedImageView_border_width, -1);

    // don't allow negative values for radius and border
    if (cornerRadius < 0) {
      cornerRadius = DEFAULT_RADIUS;
    }
    if (borderWidth < 0) {
      borderWidth = DEFAULT_BORDER_WIDTH;
    }

    borderColor = a.getColorStateList(R.styleable.RoundedImageView_border_color);
    if (borderColor == null) {
      borderColor = ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR);
    }

    mutateBackground = a.getBoolean(R.styleable.RoundedImageView_mutate_background, false);
    isOval = a.getBoolean(R.styleable.RoundedImageView_oval, false);

    updateDrawableAttrs();
    updateBackgroundDrawableAttrs(true);

    a.recycle();
  }

  @Override
  protected void drawableStateChanged() {
    super.drawableStateChanged();
    invalidate();
  }

  /**
   * Return the current scale type in use by this ImageView.
   *
   * @attr ref android.R.styleable#ImageView_scaleType
   * @see android.widget.ImageView.ScaleType
   */
  @Override
  public ScaleType getScaleType() {
    return mScaleType;
  }

  /**
   * Controls how the image should be resized or moved to match the size
   * of this ImageView.
   *
   * @param scaleType The desired scaling mode.
   * @attr ref android.R.styleable#ImageView_scaleType
   */
  @Override
  public void setScaleType(ScaleType scaleType) {
    assert scaleType != null;

    if (mScaleType != scaleType) {
      mScaleType = scaleType;

      switch (scaleType) {
        case CENTER:
        case CENTER_CROP:
        case CENTER_INSIDE:
        case FIT_CENTER:
        case FIT_START:
        case FIT_END:
        case FIT_XY:
          super.setScaleType(ScaleType.FIT_XY);
          break;
        default:
          super.setScaleType(scaleType);
          break;
      }

      updateDrawableAttrs();
      updateBackgroundDrawableAttrs(false);
      invalidate();
    }
  }

  @Override
  public void setImageDrawable(Drawable drawable) {
    mResource = 0;
    mDrawable = RoundedDrawable.fromDrawable(drawable);
    updateDrawableAttrs();
    super.setImageDrawable(mDrawable);
  }

  @Override
  public void setImageBitmap(Bitmap bm) {
    mResource = 0;
    mDrawable = RoundedDrawable.fromBitmap(bm);
    updateDrawableAttrs();
    super.setImageDrawable(mDrawable);
  }

  @Override
  public void setImageResource(int resId) {
    if (mResource != resId) {
      mResource = resId;
      mDrawable = resolveResource();
      updateDrawableAttrs();
      super.setImageDrawable(mDrawable);
    }
  }

  @Override public void setImageURI(Uri uri) {
    super.setImageURI(uri);
    setImageDrawable(getDrawable());
  }

  private Drawable resolveResource() {
    Resources rsrc = http://www.mamicode.com/getResources();>
小记: 太方便了  真心感谢开源者
每日精进一点点  谢谢


Android图片圆角转换 RoundedImageView开源项目 小记