CircleImageView 圆形图片

画圆的类：

CircleImageView ,有一个不好的地方，第一次加载应用程序的时候，不显示图片。
RoundImageView 就更好的解决了这个问题。
  1 public class CircleImageView extends ImageView {
  2 
  3     private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;
  4 
  5     private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;
  6     private static final int COLORDRAWABLE_DIMENSION = 2;
  7 
  8     private static final int DEFAULT_BORDER_WIDTH = 0;
  9     private static final int DEFAULT_BORDER_COLOR = Color.BLACK;
 10 
 11     private final RectF mDrawableRect = new RectF();
 12     private final RectF mBorderRect = new RectF();
 13 
 14     private final Matrix mShaderMatrix = new Matrix();
 15     private final Paint mBitmapPaint = new Paint();
 16     private final Paint mBorderPaint = new Paint();
 17 
 18     private int mBorderColor = DEFAULT_BORDER_COLOR;
 19     private int mBorderWidth = DEFAULT_BORDER_WIDTH;
 20 
 21     private Bitmap mBitmap;
 22     private BitmapShader mBitmapShader;
 23     private int mBitmapWidth;
 24     private int mBitmapHeight;
 25 
 26     private float mDrawableRadius;
 27     private float mBorderRadius;
 28 
 29     private ColorFilter mColorFilter;
 30 
 31     private boolean mReady;
 32     private boolean mSetupPending;
 33 
 34     public CircleImageView(Context context) {
 35         super(context);
 36 
 37         init();
 38     }
 39 
 40     public CircleImageView(Context context, AttributeSet attrs) {
 41         this(context, attrs, 0);
 42     }
 43 
 44     public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
 45         super(context, attrs, defStyle);
 46 
 47         TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);
 48 
 49         mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);
 50         mBorderColor = a.getColor(R.styleable.CircleImageView_border_color, DEFAULT_BORDER_COLOR);
 51 
 52         a.recycle();
 53 
 54         init();
 55     }
 56 
 57     private void init() {
 58         super.setScaleType(SCALE_TYPE);
 59         mReady = true;
 60 
 61         if (mSetupPending) {
 62             setup();
 63             mSetupPending = false;
 64         }
 65     }
 66 
 67     @Override
 68     public ScaleType getScaleType() {
 69         return SCALE_TYPE;
 70     }
 71 
 72     @Override
 73     public void setScaleType(ScaleType scaleType) {
 74         if (scaleType != SCALE_TYPE) {
 75             throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));
 76         }
 77     }
 78 
 79     @Override
 80     public void setAdjustViewBounds(boolean adjustViewBounds) {
 81         if (adjustViewBounds) {
 82             throw new IllegalArgumentException("adjustViewBounds not supported.");
 83         }
 84     }
 85 
 86     @Override
 87     protected void onDraw(Canvas canvas) {
 88         if (getDrawable() == null) {
 89             return;
 90         }
 91 
 92         canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);
 93         if (mBorderWidth != 0) {
 94             canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, mBorderPaint);
 95         }
 96     }
 97 
 98     @Override
 99     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
100         super.onSizeChanged(w, h, oldw, oldh);
101         setup();
102     }
103 
104     public int getBorderColor() {
105         return mBorderColor;
106     }
107 
108     public void setBorderColor(int borderColor) {
109         if (borderColor == mBorderColor) {
110             return;
111         }
112 
113         mBorderColor = borderColor;
114         mBorderPaint.setColor(mBorderColor);
115         invalidate();
116     }
117 
118     public int getBorderWidth() {
119         return mBorderWidth;
120     }
121 
122     public void setBorderWidth(int borderWidth) {
123         if (borderWidth == mBorderWidth) {
124             return;
125         }
126 
127         mBorderWidth = borderWidth;
128         setup();
129     }
130 
131     @Override
132     public void setImageBitmap(Bitmap bm) {
133         super.setImageBitmap(bm);
134         mBitmap = bm;
135         setup();
136     }
137 
138     @Override
139     public void setImageDrawable(Drawable drawable) {
140         super.setImageDrawable(drawable);
141         mBitmap = getBitmapFromDrawable(drawable);
142         setup();
143     }
144 
145     @Override
146     public void setImageResource(int resId) {
147         super.setImageResource(resId);
148         mBitmap = getBitmapFromDrawable(getDrawable());
149         setup();
150     }
151 
152     @Override
153     public void setImageURI(Uri uri) {
154         super.setImageURI(uri);
155         mBitmap = getBitmapFromDrawable(getDrawable());
156         setup();
157     }
158 
159     @Override
160     public void setColorFilter(ColorFilter cf) {
161         if (cf == mColorFilter) {
162             return;
163         }
164 
165         mColorFilter = cf;
166         mBitmapPaint.setColorFilter(mColorFilter);
167         invalidate();
168     }
169 
170     private Bitmap getBitmapFromDrawable(Drawable drawable) {
171         if (drawable == null) {
172             return null;
173         }
174 
175         if (drawable instanceof BitmapDrawable) {
176             return ((BitmapDrawable) drawable).getBitmap();
177         }
178 
179         try {
180             Bitmap bitmap;
181 
182             if (drawable instanceof ColorDrawable) {
183                 bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);
184             } else {
185                 bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);
186             }
187 
188             Canvas canvas = new Canvas(bitmap);
189             drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
190             drawable.draw(canvas);
191             return bitmap;
192         } catch (OutOfMemoryError e) {
193             return null;
194         }
195     }
196 
197     private void setup() {
198         if (!mReady) {
199             mSetupPending = true;
200             return;
201         }
202 
203         if (mBitmap == null) {
204             return;
205         }
206 
207         mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
208 
209         mBitmapPaint.setAntiAlias(true);
210         mBitmapPaint.setShader(mBitmapShader);
211 
212         mBorderPaint.setStyle(Paint.Style.STROKE);
213         mBorderPaint.setAntiAlias(true);
214         mBorderPaint.setColor(mBorderColor);
215         mBorderPaint.setStrokeWidth(mBorderWidth);
216 
217         mBitmapHeight = mBitmap.getHeight();
218         mBitmapWidth = mBitmap.getWidth();
219 
220         mBorderRect.set(0, 0, getWidth(), getHeight());
221         mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2);
222 
223         mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width() - mBorderWidth, mBorderRect.height() - mBorderWidth);
224         mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2);
225 
226         updateShaderMatrix();
227         invalidate();
228     }
229 
230     private void updateShaderMatrix() {
231         float scale;
232         float dx = 0;
233         float dy = 0;
234 
235         mShaderMatrix.set(null);
236 
237         if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {
238             scale = mDrawableRect.height() / (float) mBitmapHeight;
239             dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;
240         } else {
241             scale = mDrawableRect.width() / (float) mBitmapWidth;
242             dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;
243         }
244 
245         mShaderMatrix.setScale(scale, scale);
246         mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth, (int) (dy + 0.5f) + mBorderWidth);
247 
248         mBitmapShader.setLocalMatrix(mShaderMatrix);
249     }
250 
251 }

XMl中：(注意：xml中要设置命名空间 xmlns:app(自己取名)="http://schemas.android.com/apk/res/主包名")

只能在xml中用src属性有效。用代码动态定义控件无效。

1 <com.qianfeng.xingshuaieducation.ui.CircleImageView
2         android:id="@+id/imgv__header_lvitem_shequ"
3         android:layout_width="60dp"
4         android:layout_height="60dp"
5         app:border_width="2dp"
6         app:border_color="#FF000000"
7         android:src="@drawable/ic_launcher" />

 

attrs, R.styleable.CircleImageView
1 <resources>
2     <declare-styleable name="CircleImageView">
3         <attr name="border_width" format="dimension" />
4         <attr name="border_color" format="color" />
5     </declare-styleable>
6 </resources>

 

posted @ 2015-09-05 11:46  annie-baby  阅读(460)  评论(0)  编辑  收藏  举报