Android圆形头像图实现，android圆形头像,现在很多的应用都有设置头

Android圆形头像图实现，android圆形头像,现在很多的应用都有设置头

现在很多的应用都有设置头像的功能，如QQ、微信、微博等。头像有标准的四方形，也有圆形（如QQ）。现在结合他人的代码加以修改，给出一个以原始图形中心为原点，修剪图片为头像的工具类，此类

可以直接在布局文件中加载使用，比如：

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"          xmlns:tools="http://schemas.android.com/tools"          android:layout_width="match_parent"          android:layout_height="match_parent" >          <zhangphil.circle.CircleImageView              android:id="@+id/civ"              android:layout_width="wrap_content"              android:layout_height="wrap_content"              android:src="@drawable/pic" />      </RelativeLayout>  

CircleImageView.java的完整源代码：

import android.content.Context;  import android.content.res.TypedArray;  import android.graphics.Bitmap;  import android.graphics.BitmapShader;  import android.graphics.Canvas;  import android.graphics.Color;  import android.graphics.Matrix;  import android.graphics.Paint;  import android.graphics.Paint.Align;  import android.graphics.Rect;  import android.graphics.RectF;  import android.graphics.Shader;  import android.graphics.SweepGradient;  import android.graphics.drawable.BitmapDrawable;  import android.graphics.drawable.ColorDrawable;  import android.graphics.drawable.Drawable;  import android.net.Uri;  import android.text.TextPaint;  import android.util.AttributeSet;  import android.util.FloatMath;  import android.widget.ImageView;  /**  * @author Phil  *  */  public class CircleImageView extends ImageView {      private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;      private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;      private static final int COLORDRAWABLE_DIMENSION = 2;      // 圆形边框的厚度默认值。      // 如果是0，则没有天蓝色渐变的边框。      private static final int DEFAULT_BORDER_WIDTH = 20;      private static final int DEFAULT_BORDER_COLOR = Color.BLACK;      private final RectF mDrawableRect = new RectF();      private final RectF mBorderRect = new RectF();      private final Matrix mShaderMatrix = new Matrix();      private final Paint mBitmapPaint = new Paint();      private final Paint mBorderPaint = new Paint();      private int mBorderColor = DEFAULT_BORDER_COLOR;      private int mBorderWidth = DEFAULT_BORDER_WIDTH;      private Bitmap mBitmap;      private BitmapShader mBitmapShader;      private int mBitmapWidth;      private int mBitmapHeight;      private float mDrawableRadius;      private float mBorderRadius;      private boolean mReady;      private boolean mSetupPending;      private final Paint mFlagBackgroundPaint = new Paint();      private final TextPaint mFlagTextPaint = new TextPaint();      private String mFlagText;      private boolean mShowFlag = false;      private Rect mFlagTextBounds = new Rect();      Shader mSweepGradient = null;      public CircleImageView(Context context) {          super(context);          init();      }      public CircleImageView(Context context, AttributeSet attrs) {          this(context, attrs, 0);      }      public CircleImageView(Context context, AttributeSet attrs, int defStyle) {          super(context, attrs, defStyle);          // TypedArray a = context.obtainStyledAttributes(attrs,          // R.styleable.CircleImageView, defStyle, 0);          //          // mBorderWidth =          // a.getDimensionPixelSize(R.styleable.CircleImageView_border_width,          // DEFAULT_BORDER_WIDTH);          // mBorderColor = a.getColor(R.styleable.CircleImageView_border_color,          // DEFAULT_BORDER_COLOR);          //          // a.recycle();          init();      }      private void init() {          super.setScaleType(SCALE_TYPE);          mReady = true;          if (mSetupPending) {              setup();              mSetupPending = false;          }      }      @Override      public ScaleType getScaleType() {          return SCALE_TYPE;      }      @Override      public void setScaleType(ScaleType scaleType) {          if (scaleType != SCALE_TYPE) {              throw new IllegalArgumentException(String.format(                      "ScaleType %s not supported.", scaleType));          }      }      @Override      public void setAdjustViewBounds(boolean adjustViewBounds) {          if (adjustViewBounds) {              throw new IllegalArgumentException(                      "adjustViewBounds not supported.");          }      }      @Override      protected void onDraw(Canvas canvas) {          if (getDrawable() == null) {              return;          }          canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius,                  mBitmapPaint);          if (mBorderWidth != 0) {              canvas.save();              canvas.rotate(20, getWidth() / 2, getHeight() / 2);              canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius,                      mBorderPaint);              canvas.restore();          }          if (mShowFlag && mFlagText != null) {              canvas.drawArc(mBorderRect, 40, 100, false, mFlagBackgroundPaint);              mFlagTextPaint.getTextBounds(mFlagText, 0, mFlagText.length(),                      mFlagTextBounds);              canvas.drawText(mFlagText, getWidth() / 2,                      (3 + FloatMath.cos((float) (Math.PI * 5 / 18)))                              * getHeight() / 4 + mFlagTextBounds.height() / 3,                      mFlagTextPaint);          }      }      @Override      protected void onSizeChanged(int w, int h, int oldw, int oldh) {          super.onSizeChanged(w, h, oldw, oldh);          setup();      }      public int getBorderColor() {          return mBorderColor;      }      public void setBorderColor(int borderColor) {          if (borderColor == mBorderColor) {              return;          }          mBorderColor = borderColor;          mBorderPaint.setColor(mBorderColor);          invalidate();      }      public int getBorderWidth() {          return mBorderWidth;      }      /**      * @param borderWidth      *            圆形的边框厚度。      */      public void setBorderWidth(int borderWidth) {          if (borderWidth == mBorderWidth) {              return;          }          mBorderWidth = borderWidth;          setup();      }      @Override      public void setImageBitmap(Bitmap bm) {          super.setImageBitmap(bm);          mBitmap = bm;          setup();      }      @Override      public void setImageDrawable(Drawable drawable) {          super.setImageDrawable(drawable);          mBitmap = getBitmapFromDrawable(drawable);          setup();      }      @Override      public void setImageResource(int resId) {          super.setImageResource(resId);          mBitmap = getBitmapFromDrawable(getDrawable());          setup();      }      @Override      public void setImageURI(Uri uri) {          super.setImageURI(uri);          mBitmap = getBitmapFromDrawable(getDrawable());          setup();      }      private Bitmap getBitmapFromDrawable(Drawable drawable) {          if (drawable == null) {              return null;          }          if (drawable instanceof BitmapDrawable) {              return ((BitmapDrawable) drawable).getBitmap();          }          try {              Bitmap bitmap;              if (drawable instanceof ColorDrawable) {                  bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION,                          COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);              } else {                  bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),                          drawable.getIntrinsicHeight(), BITMAP_CONFIG);              }              Canvas canvas = new Canvas(bitmap);              drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());              drawable.draw(canvas);              return bitmap;          } catch (OutOfMemoryError e) {              return null;          }      }      private void setup() {          if (!mReady) {              mSetupPending = true;              return;          }          if (mBitmap == null) {              return;          }          mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP,                  Shader.TileMode.CLAMP);          mBitmapPaint.setAntiAlias(true);          mBitmapPaint.setShader(mBitmapShader);          mBorderPaint.setStyle(Paint.Style.STROKE);          mBorderPaint.setAntiAlias(true);          mBorderPaint.setColor(mBorderColor);          mBorderPaint.setStrokeWidth(mBorderWidth);          mBitmapHeight = mBitmap.getHeight();          mBitmapWidth = mBitmap.getWidth();          mBorderRect.set(0, 0, getWidth(), getHeight());          mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2,                  (mBorderRect.width() - mBorderWidth) / 2);          mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width()                  - mBorderWidth, mBorderRect.height() - mBorderWidth);          mDrawableRadius = Math.min(mDrawableRect.height() / 2,                  mDrawableRect.width() / 2);          mFlagBackgroundPaint.setColor(Color.BLACK & 0x66FFFFFF);          mFlagBackgroundPaint.setFlags(TextPaint.ANTI_ALIAS_FLAG);          mFlagTextPaint.setFlags(TextPaint.ANTI_ALIAS_FLAG);          mFlagTextPaint.setTextAlign(Align.CENTER);          mFlagTextPaint.setColor(Color.WHITE);          mFlagTextPaint                  .setTextSize(getResources().getDisplayMetrics().density * 18);          mSweepGradient = new SweepGradient(getWidth() / 2, getHeight() / 2,                  new int[] { Color.rgb(255, 255, 255), Color.rgb(1, 209, 255) },                  null);          mBorderPaint.setShader(mSweepGradient);          updateShaderMatrix();          invalidate();      }      private void updateShaderMatrix() {          float scale;          float dx = 0;          float dy = 0;          mShaderMatrix.set(null);          if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width()                  * mBitmapHeight) {              scale = mDrawableRect.height() / (float) mBitmapHeight;              dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;          } else {              scale = mDrawableRect.width() / (float) mBitmapWidth;              dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;          }          mShaderMatrix.setScale(scale, scale);          mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth,                  (int) (dy + 0.5f) + mBorderWidth);          mBitmapShader.setLocalMatrix(mShaderMatrix);      }      public void setShowFlag(boolean show) {          mShowFlag = show;          invalidate();      }      public void setFlagText(String text) {          mFlagText = text;          invalidate();      }  }