在自定义ImageView中将图像在顶部对齐

public class TopAlignedImageView extends ImageView {
    public TopAlignedImageView(Context context) {
        super(context);
    }

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

    public TopAlignedImageView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        Drawable drawable = getDrawable();
        if (drawable == null) {
            super.onDraw(canvas);
            return;
        }

        // 获取ImageView的宽度和高度
        int viewWidth = getWidth();
        int viewHeight = getHeight();

        // 获取图像的宽度和高度
        int drawableWidth = drawable.getIntrinsicWidth();
        int drawableHeight = drawable.getIntrinsicHeight();

        // 计算缩放比例
        float scale = Math.max((float) viewWidth / drawableWidth, (float) viewHeight / drawableHeight);

        // 计算图像在ImageView中的实际宽度和高度
        int scaledDrawableWidth = Math.round(drawableWidth * scale);
        int scaledDrawableHeight = Math.round(drawableHeight * scale);

        // 计算图像在ImageView中的左上角坐标
        int left = (viewWidth - scaledDrawableWidth) / 2;
        int top = 0;

        // 设置图像的绘制区域
        drawable.setBounds(left, top, left + scaledDrawableWidth, top + scaledDrawableHeight);

        // 绘制图像
        drawable.draw(canvas);
    }
}

<com.example.TopAlignedImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:src="@drawable/image"
    />