Android图片圆角转换 RoundedImageView开源项目 小记

 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="@drawable/photo1"
        android:scaleType="center"
        makeramen:corner_radius="30dip"
        makeramen:border_width="2dip"
        makeramen:border_color="#333333" />

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="@drawable/photo1"
        android:scaleType="center"
        makeramen:corner_radius="100dp"
        makeramen:border_width="2dip"
        makeramen:border_color="#333333" />
	<TextView
	    android:id="@+id/textView3"
	    android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="36dp"
        android:layout_marginLeft="36dp"
        android:layout_alignBottom="@+id/imageView1"
        android:layout_alignLeft="@+id/imageView1"
        android:background="#7f000000"
        android:paddingLeft="8dp"
        android:paddingRight="8dp"
        android:textAppearance="?android:attr/textAppearanceSmallInverse" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/textView3"
        android:layout_alignLeft="@+id/textView3"
        android:layout_marginBottom="4dp"
        android:background="#7f000000"
        android:paddingLeft="8dp"
        android:paddingRight="8dp"
        android:textAppearance="?android:attr/textAppearanceMediumInverse" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/textView2"
        android:layout_alignLeft="@+id/textView2"
        android:layout_marginBottom="4dp"
        android:background="#7f000000"
        android:paddingLeft="8dp"
        android:paddingRight="8dp"
        android:textAppearance="?android:attr/textAppearanceLargeInverse" />

</RelativeLayout>

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 = getResources();
    if (rsrc == null) { return null; }

    Drawable d = null;

    if (mResource != 0) {
      try {
        d = rsrc.getDrawable(mResource);
      } catch (Exception e) {
        Log.w(TAG, "Unable to find resource: " + mResource, e);
        // Don't try again.
        mResource = 0;
      }
    }
    return RoundedDrawable.fromDrawable(d);
  }

  @Override
  public void setBackground(Drawable background) {
    setBackgroundDrawable(background);
  }

  private void updateDrawableAttrs() {
    updateAttrs(mDrawable);
  }

  private void updateBackgroundDrawableAttrs(boolean convert) {
    if (mutateBackground) {
      if (convert) {
        mBackgroundDrawable = RoundedDrawable.fromDrawable(mBackgroundDrawable);
      }
      updateAttrs(mBackgroundDrawable);
    }
  }

  private void updateAttrs(Drawable drawable) {
    if (drawable == null) { return; }

    if (drawable instanceof RoundedDrawable) {
      ((RoundedDrawable) drawable)
          .setScaleType(mScaleType)
          .setCornerRadius(cornerRadius)
          .setBorderWidth(borderWidth)
          .setBorderColor(borderColor)
          .setOval(isOval);
    } else if (drawable instanceof LayerDrawable) {
      // loop through layers to and set drawable attrs
      LayerDrawable ld = ((LayerDrawable) drawable);
      for (int i = 0, layers = ld.getNumberOfLayers(); i < layers; i++) {
        updateAttrs(ld.getDrawable(i));
      }
    }
  }

  @Override
  @Deprecated
  public void setBackgroundDrawable(Drawable background) {
    mBackgroundDrawable = background;
    updateBackgroundDrawableAttrs(true);
    super.setBackgroundDrawable(mBackgroundDrawable);
  }

  public float getCornerRadius() {
    return cornerRadius;
  }

  public void setCornerRadius(int resId) {
    setCornerRadius(getResources().getDimension(resId));
  }

  public void setCornerRadius(float radius) {
    if (cornerRadius == radius) { return; }

    cornerRadius = radius;
    updateDrawableAttrs();
    updateBackgroundDrawableAttrs(false);
  }

  public float getBorderWidth() {
    return borderWidth;
  }

  public void setBorderWidth(int resId) {
    setBorderWidth(getResources().getDimension(resId));
  }

  public void setBorderWidth(float width) {
    if (borderWidth == width) { return; }

    borderWidth = width;
    updateDrawableAttrs();
    updateBackgroundDrawableAttrs(false);
    invalidate();
  }

  public int getBorderColor() {
    return borderColor.getDefaultColor();
  }

  public void setBorderColor(int color) {
    setBorderColor(ColorStateList.valueOf(color));
  }

  public ColorStateList getBorderColors() {
    return borderColor;
  }

  public void setBorderColor(ColorStateList colors) {
    if (borderColor.equals(colors)) { return; }

    borderColor =
        (colors != null) ? colors : ColorStateList.valueOf(RoundedDrawable.DEFAULT_BORDER_COLOR);
    updateDrawableAttrs();
    updateBackgroundDrawableAttrs(false);
    if (borderWidth > 0) {
      invalidate();
    }
  }

  public boolean isOval() {
    return isOval;
  }

  public void setOval(boolean oval) {
    isOval = oval;
    updateDrawableAttrs();
    updateBackgroundDrawableAttrs(false);
    invalidate();
  }

  public boolean isMutateBackground() {
    return mutateBackground;
  }

  public void setMutateBackground(boolean mutate) {
    if (mutateBackground == mutate) { return; }

    mutateBackground = mutate;
    updateBackgroundDrawableAttrs(true);
    invalidate();
  }
}

每日精进一点点  谢谢