圆形图

来源：互联网发布：mysql count查询太慢编辑：程序博客网时间：2024/05/17 03:13

自定义圆形图控件

public class RoundImageView 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 = 1;      private static final int DEFAULT_BORDER_WIDTH = 0;      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;      public RoundImageView(Context context) {        super(context);      }      public RoundImageView(Context context, AttributeSet attrs) {        this(context, attrs, 0);      }      public RoundImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        super.setScaleType(SCALE_TYPE);        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();        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      protected void onDraw(Canvas canvas) {        if (getDrawable() == null) {          return;        }        canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);        canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, mBorderPaint);      }      @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;      }      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();      }      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);        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);      }    }

需要在values文件夹下创建attr.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="CircleImageView">        <attr name="border_width" format="dimension" />        <attr name="border_color" format="color" />    </declare-styleable></resources>

布局中使用该控件即可

<com.example.androidtest.RoundImageView     android:id="@+id/img"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_centerVertical="true"    />

程序中给该控件设置图片

img=(RoundImageView) findViewById(R.id.img);        img.setImageResource(R.drawable.cardetails_img_xingshi);

0 0