Question

我目前有两个ImageViews，对齐如下：

http://imgur.com/RqltwbJ

我希望他们看起来像这样：

http://imgur.com/paBpqSI

（红色是透明的）

我假设您需要为每张图片绘制一个半圆，看起来像我想要的那样。

我目前卡住了，因为我不知道如何绘制半圆：x

它看起来像什么：

http://imgur.com/jGh2NVY

我当前进展的代码：

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.util.AttributeSet;

public class CustomImageView extends android.support.v7.widget.AppCompatImageView {

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

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

    public CustomImageView(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();
        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) {
            float smallest = Math.min(bmp.getWidth(), bmp.getHeight());
            float factor = smallest / radius;
            sbmp = Bitmap.createScaledBitmap(bmp, (int)(bmp.getWidth() / factor),
                    (int)(bmp.getHeight() / factor), false);
        } else {
            sbmp = bmp;
        }

        Bitmap output = Bitmap.createBitmap(radius, radius,
                Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);

        final int color = 0xffa19774;
        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, radius, radius);

        paint.setAntiAlias(true);
        paint.setFilterBitmap(true);
        paint.setDither(true);
        canvas.drawARGB(0, 0, 0, 0);
        paint.setColor(Color.parseColor("#BAB399"));
        canvas.drawCircle(radius / 2 + 0.7f,
                radius / 2 + 0.7f, radius / 2 + 0.1f, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(sbmp, rect, rect, paint);

        return output;
    }

}

活动代码：

ImageView picture1= (ImageView) findViewById(R.id.picture1);
        Bitmap bitmap1= BitmapFactory.decodeResource(this.getResources(),
                R.drawable.picture1);
        ImageView picture2= (ImageView) findViewById(R.id.picture2);
        Bitmap bitmap2= BitmapFactory.decodeResource(this.getResources(),
                R.drawable.picture2);

        picture1.setImageBitmap(CustomImageView.getCroppedBitmap(bitmap1, 360));
        picture2.setImageBitmap(CustomImageView.getCroppedBitmap(bitmap2, 360));

Answer 1

只需在ImageView中添加两个Drawable

In [60]: d.fillna(d.columns.to_series())
Out[60]:
   a  b
0  1  b
1  2  5
2  3  6

topImage.xml

<ImageView
    android:id="@+id/topImageView"
    android:layout_width="20dp"
    android:layout_height="10dp"
    android:background="@drawable/topImage" />
<ImageView
    android:id="@+id/bottomImageView"
    android:layout_width="20dp"
    android:layout_height="10dp"
    android:background="@drawable/bottomImage" />

bottomImage.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:topRightRadius="10dp"
        android:topLeftRadius="10dp" />
</shape>

从ImageView形成半圆

1 个答案: