我会尽量做空 - 所以我正在创建这个应用程序,将图像上传到自定义NSArray
,绘制画布并保存。现在我成功地执行了所有操作,直至保存它。我尝试了很多不同的方法,但都没有。
我使用Webview
保存未经编辑的图片:
Url
我在自定义public void DownloadFromUrl(String fileName) { //this is the downloader method
try {
URL url = new URL(wv2.getUrl()); //you can write here any link
File file = new File(fileName);
Canvas canvas = new Canvas();
wv2.draw(canvas );
long startTime = System.currentTimeMillis();
Log.d("ImageManager", "download begining");
Log.d("ImageManager", "download url:" + url);
Log.d("ImageManager", "downloaded file name:" + fileName);
URLConnection ucon = url.openConnection();
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
FileOutputStream fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.close();
Log.d("ImageManager", "download ready in"
+ ((System.currentTimeMillis() - startTime) / 1000)
+ " sec");
} catch (IOException e) {
Log.d("ImageManager", "Error: " + e);
}
}
中的绘制功能如下所示:
webview
要显示已编辑的图像,我想我需要使用它:
@Override
protected void onDraw(Canvas canvas) {
super.onDraw (canvas);
/*code that draws different stuff*/
}
但同样,我不知道如何将画布合并到图像中。我应该使用绘图缓存吗?如果是,那怎么办?
[UPDATE]
好的,所以我设法使用此代码保存已编辑的图像
canvas = new Canvas(mutableBitmap);
wv2.draw(canvas);
tstImage.setImageBitmap(mutableBitmap);
SaveImage:
wv2.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(wv2.getDrawingCache());
wv2.setDrawingCacheEnabled(false);
tstImage.setImageBitmap(bitmap);
SaveImage(bitmap);
我唯一的问题是我得到的图像是当时webview中显示的图像。因此,如果我缩放图像,它只会保存一部分。
[更新2]
我已经修改了其中一个答案以寻找解决方案,这就是我写的。没有显示图像。
private void SaveImage(Bitmap finalBitmap) {
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/Pictures/");
myDir.mkdirs();
String fname = "Image-"+ count +".jpg";
File file = new File (myDir, fname);
if (file.exists ()) file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}