如何更改別針按鈕（Pinterest）背景矩形爲圓形？

Question

我在我的應用程序中使用pint按鈕，但它是矩形形狀。我如何改變與自定義背景的圓形按鈕。我如何設置品脫背景按鈕。

<com.pinterest.pinit.PinItButton 
    android:id="@+id/pin_bt" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 

    android:layout_margin="5dp" /> 

Answer 1

您可以使用圓角imageview的代碼，XML

<in.appera.sachin.ImageViewRounded 
     android:id="@+id/ivProfile" 
     android:layout_width="100dp" 
     android:layout_height="100dp" 
     android:layout_marginTop="30dp" 
     /> 

代碼ImageViewRounded的.class

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; 
import android.graphics.PorterDuff.Mode; 
import android.graphics.PorterDuffXfermode; 
import android.graphics.Rect; 
import android.graphics.RectF; 
import android.graphics.drawable.BitmapDrawable; 
import android.util.AttributeSet; 
import android.widget.ImageView; 

public class ImageViewRounded extends ImageView { 

public ImageViewRounded(Context context) { 
    super(context); 
} 

public ImageViewRounded(Context context, AttributeSet attrs) { 
    super(context, attrs); 
} 

public ImageViewRounded(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
} 

@Override 
protected void onDraw(Canvas canvas) { 
    BitmapDrawable drawable = (BitmapDrawable) getDrawable(); 

    if (drawable == null) { 
     return; 
    } 

    if (getWidth() == 0 || getHeight() == 0) { 
     return; 
    } 

    Bitmap fullSizeBitmap = drawable.getBitmap(); 

    int scaledWidth = getMeasuredWidth(); 
    int scaledHeight = getMeasuredHeight(); 

    Bitmap mScaledBitmap; 
    if (scaledWidth == fullSizeBitmap.getWidth() 
      && scaledHeight == fullSizeBitmap.getHeight()) { 
     mScaledBitmap = fullSizeBitmap; 
    } else { 
     mScaledBitmap = Bitmap.createScaledBitmap(fullSizeBitmap, 
       scaledWidth, scaledHeight, true /* filter */); 
    } 

    // Bitmap roundBitmap = getRoundedCornerBitmap(mScaledBitmap); 

    // Bitmap roundBitmap = getRoundedCornerBitmap(getContext(), 
    // mScaledBitmap, 10, scaledWidth, scaledHeight, false, false, 
    // false, false); 
    // canvas.drawBitmap(roundBitmap, 0, 0, null); 

    Bitmap circleBitmap = getCircledBitmap(mScaledBitmap); 

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

} 

public Bitmap getRoundedCornerBitmap(Context context, Bitmap input, 
     int pixels, int w, int h, boolean squareTL, boolean squareTR, 
     boolean squareBL, boolean squareBR) { 

    Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888); 
    Canvas canvas = new Canvas(output); 
    final float densityMultiplier = context.getResources() 
      .getDisplayMetrics().density; 

    final int color = 0xff424242; 

    final Paint paint = new Paint(); 
    final Rect rect = new Rect(0, 0, w, h); 
    final RectF rectF = new RectF(rect); 

    // make sure that our rounded corner is scaled appropriately 
    final float roundPx = pixels * densityMultiplier; 

    paint.setAntiAlias(true); 
    canvas.drawARGB(0, 0, 0, 0); 
    paint.setColor(color); 
    canvas.drawRoundRect(rectF, roundPx, roundPx, paint); 

    // draw rectangles over the corners we want to be square 
    if (squareTL) { 
     canvas.drawRect(0, 0, w/2, h/2, paint); 
    } 
    if (squareTR) { 
     canvas.drawRect(w/2, 0, w, h/2, paint); 
    } 
    if (squareBL) { 
     canvas.drawRect(0, h/2, w/2, h, paint); 
    } 
    if (squareBR) { 
     canvas.drawRect(w/2, h/2, w, h, paint); 
    } 

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); 
    canvas.drawBitmap(input, 0, 0, paint); 

    return output; 
} 

Bitmap getCircledBitmap(Bitmap bitmap) { 

    Bitmap result = Bitmap.createBitmap(bitmap.getWidth(), 
      bitmap.getHeight(), Bitmap.Config.ARGB_8888); 

    Canvas canvas = new Canvas(result); 

    int color = Color.BLUE; 
    Paint paint = new Paint(); 
    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 

    paint.setAntiAlias(true); 
    canvas.drawARGB(0, 0, 0, 0); 
    paint.setColor(color); 
    // canvas.drawRoundRect(rectF, roundPx, roundPx, paint); 
    canvas.drawCircle(bitmap.getWidth()/2, bitmap.getHeight()/2, 
      bitmap.getHeight()/2, paint); 

    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); 
    canvas.drawBitmap(bitmap, rect, rect, paint); 

    return result; 
}