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  • 1 # dadazhu1

    首先,定義定義圓形Imageview類:

    import android.content.Context;

    import android.graphics.Bitmap;

    import android.graphics.Bitmap.Config;

    import android.graphics.Canvas;

    import android.graphics.Color;

    import android.graphics.Paint;

    import android.graphics.PorterDuff.Mode;

    import android.graphics.PorterDuffXfermode;

    import android.graphics.Rect;

    import android.graphics.drawable.BitmapDrawable;

    import android.graphics.drawable.Drawable;

    import android.util.AttributeSet;

    import android.widget.ImageView;

    public class RoundImageView extends ImageView {

    public RoundImageView(Context context) {

    super(context);

    // TODO Auto-generated constructor stub

    }

    public RoundImageView(Context context, AttributeSet attrs) {

    super(context, attrs);

    }

    public RoundImageView(Context context, AttributeSet attrs, int defStyle) {

    super(context, attrs, defStyle);

    }

    @Override

    protected void onDraw(Canvas canvas) {

    Drawable drawable = getDrawable();

    if (drawable == null) {

    return;

    }

    if (getWidth() == 0 || getHeight() == 0) {

    return;

    }

    Bitmap b = ((BitmapDrawable)drawable).getBitmap();

    if(null == b)

    {

    return;

    }

    Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);

    int w = getWidth(), h = getHeight();

    Bitmap roundBitmap = getCroppedBitmap(bitmap, w);

    canvas.drawBitmap(roundBitmap, 0,0, null);

    }

    public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {

    Bitmap sbmp;

    if(bmp.getWidth() != radius || bmp.getHeight() != radius)

    sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);

    else

    sbmp = bmp;

    Bitmap output = Bitmap.createBitmap(sbmp.getWidth(),

    sbmp.getHeight(), Config.ARGB_8888);

    Canvas canvas = new Canvas(output);

    final int color = 0xffa19774;

    final Paint paint = new Paint();

    final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());

    paint.setAntiAlias(true);

    paint.setFilterBitmap(true);

    paint.setDither(true);

    canvas.drawARGB(0, 0, 0, 0);

    paint.setColor(Color.parseColor("#BAB399"));

    canvas.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f,

    sbmp.getWidth() / 2+0.1f, paint);

    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));

    canvas.drawBitmap(sbmp, rect, rect, paint);

    return output;

    }

    }

    然後在別的佈局檔案中使用該控制元件即可,如:

    <?xml version="1.0" encoding="utf-8"?>

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="@drawable/side_right"

    android:gravity="center"

    android:orientation="vertical" >

    <LinearLayout

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:gravity="center"

    android:layout_marginTop="35dip"

    android:orientation="vertical" >

    <<span>com.founder.reader.view.RoundImageView</span>

    android:id="@+id/right_login_head"

    android:layout_width="60dip"

    android:layout_height="60dip"

    android:scaleType="centerInside"

    android:src="@drawable/user" />

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