Android 创建圆形位图时强制停止
我试图通过从服务器获取的URL将循环位图设置为ImageView,但有时会强制停止,因此下面是我的异步循环图像加载类:Android 创建圆形位图时强制停止,android,url,bitmap,Android,Url,Bitmap,我试图通过从服务器获取的URL将循环位图设置为ImageView,但有时会强制停止,因此下面是我的异步循环图像加载类: public class AsyncTaskLoadImage extends AsyncTask<String, String, Bitmap> { private final static String TAG = "AsyncTaskLoadImage"; private ImageView imageView; public AsyncTaskLoadIm
public class AsyncTaskLoadImage extends AsyncTask<String, String, Bitmap> {
private final static String TAG = "AsyncTaskLoadImage";
private ImageView imageView;
public AsyncTaskLoadImage(ImageView imageView) {
this.imageView = imageView;
}
@Override
protected Bitmap doInBackground(String... params) {
Bitmap bitmap = null;
try {
URL url = new URL(params[0]);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
bitmap = BitmapFactory.decodeStream((InputStream)url.getContent(), null, options);
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
return bitmap;
}
@Override
protected void onPostExecute(Bitmap bitmap) {
Bitmap circleBitmap = null;
circleBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_4444);
BitmapShader shader = new BitmapShader (bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
Paint paint = new Paint();
paint.setShader(shader);
paint.setAntiAlias(true);
Canvas c = new Canvas(circleBitmap);
c.drawCircle(bitmap.getWidth()/2, bitmap.getHeight()/2, bitmap.getWidth()/2, paint);
imageView.setImageBitmap(circleBitmap);
}
}
其中出现错误的行是:
circleBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_4444);
BitmapShader shader = new BitmapShader (bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
这很奇怪,因为有时错误发生在第一行,有时发生在第二行,有时没有强制停止。
那么有人知道如何解决这个问题吗?我认为使用库在Imageview中设置服务器映像的最佳方法 如以下代码所示:
Picasso
.with(context)
.load(url)
.placeholder(placeHolderDrawable)
.error(errorDrawable)
.transform(circleTransform)
.into(imageView);
以及从此链接复制的循环转换的代码:
我认为使用库在Imageview中设置服务器映像的最佳方法
如以下代码所示:
Picasso
.with(context)
.load(url)
.placeholder(placeHolderDrawable)
.error(errorDrawable)
.transform(circleTransform)
.into(imageView);
以及从此链接复制的循环转换的代码:
为什么有这么多代码只用于图像加载?使用Glide加载图像。它可以为你处理所有的事情,而且只是一行代码。为什么有那么多代码只用于图像加载?使用Glide加载图像。它可以为您处理所有事情,只是一行代码当我试图编译毕加索或Glide到gradle中的项目时,我遇到以下错误:/Failed to resolve:com.android.support:support annotations:27.1.1/Failed to resolve:com.android.support:support fragment:27.1.1/Failed to resolve:annotationprocessor which您使用的buildToolsVersion do compileSdkVersion=26 supportLibVersion=“27.1.1”我正在使用buildToolsVersion“28.0.2”让我们来看看。当我试图编译毕加索或Glide到gradle中的项目时,我遇到了以下错误:/Failed to resolve:com.android.support:support annotations:27.1.1/未能解析:annotationprocessor您使用的构建工具版本do compileSdkVersion=26supportLibVersion=“27.1.1”我正在使用buildToolsVersion“28.0.2”让我们来看看。
public class CircleTransform implements Transformation {
@Override
public Bitmap transform(Bitmap source) {
int size = Math.min(source.getWidth(), source.getHeight());
int x = (source.getWidth() - size) / 2;
int y = (source.getHeight() - size) / 2;
Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size);
if (squaredBitmap != source) {
source.recycle();
}
Bitmap bitmap = Bitmap.createBitmap(size, size, source.getConfig());
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
BitmapShader shader = new BitmapShader(squaredBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
paint.setShader(shader);
paint.setAntiAlias(true);
float r = size/2f;
canvas.drawCircle(r, r, r, paint);
squaredBitmap.recycle();
return bitmap;
}
@Override
public String key() {
return "circle";
}
}