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效果如上, 这是ListView的一个item 左边是一个圆角矩形的背景. 使用glide加载图片
自定义一个FilletImageView, 代码如下:
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.RectF; import android.graphics.Xfermode; import android.util.AttributeSet; import android.util.TypedValue; import android.widget.ImageView; /** * Created by Administrator on 2016/8/19. */ public class FilletImageView extends ImageView { private Rect rect = new Rect(); private RectF rectF = new RectF(); private float radius; private Bitmap bitmap; private Xfermode xfermode = new PorterDuffXfermode(PorterDuff.Mode.SRC_IN); public FilletImageView(Context context) { this(context, null); } public FilletImageView(Context context, AttributeSet attrs) { super(context, attrs); radius = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2, getResources().getDisplayMetrics()); try { if(android.os.Build.VERSION.SDK_INT >= 11) { setLayerType(LAYER_TYPE_SOFTWARE, null); } } catch (Exception e) { e.printStackTrace(); } } @Override public void setImageBitmap(Bitmap bm) { this.bitmap = bm; } @Override protected void onDraw(Canvas canvas) { if (bitmap == null) return; rect.set(0,0,getWidth(),getHeight()); rectF.set(rect); Paint paint = new Paint(); paint.setColor(Color.RED); paint.setAntiAlias(true); canvas.drawRoundRect(rectF, radius, radius, paint); paint.setXfermode(xfermode); canvas.drawBitmap(bitmap, null, rect, paint); } }
然后在加载的时候列表项太多, 第一次没有显示出图像, 解决方法:在glide将图像下载成功后再加载. 代码如下:
好了, 一次可以全部显示了
参考:
http://blog.csdn.net/zz7zz7zz/article/details/11495517
http://www.cnblogs.com/zhaoyanjun/p/5404162.html
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原文地址:http://www.cnblogs.com/emyueguang/p/5788579.html