我上一篇文章写了《Android加载html中的svg格式图片进行显示〉,有兴趣的同学可以去看看地址：Android加载html中svg格式图片进行显示
但是我们一般在浏览图片时,还会有保存图片到相册或图库的操作,而Android手机自带的相册或图库是不支持查看svg格式的图片的,所以我们需要把svg格式的图片转为jpg或png格式再进行保存,我的例子是保存为jpg格式,png也是一样的,我这里写了个工具类,可以保存jpg,png格式的图片,也可以把svg图片转为jpg进行保存.接下来我贴下我的代码:
public class FileUtils {
public static void savePhoto(final Context context, final String url , final SaveResultCallback saveResultCallback) {
new Thread(new Runnable() {
@Override
public void run() {
File appDir = new File(Environment.getExternalStorageDirectory(), "out_photo");
if (!appDir.exists()) {
appDir.mkdir();
}
SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");//设置以当前时间格式为图片名称
String fileName = df.format(new Date()) + ".jpg";
File file = new File(appDir, fileName);
if (url.endsWith(".svg")){
//拿到图片在assets目录下的相对路径
String replaceUrl = url.replace("file:///android_asset/", "");
try {
SVG svg = new SVGBuilder().readFromAsset(context.getAssets(), replaceUrl).build();
//拿到svg图片的drawable
PictureDrawable drawable = svg.getDrawable();
//图片背景的画笔
Paint paint = new Paint();
paint.setColor(Color.WHITE);
//图片线条的画笔
Paint paint1 = new Paint();
paint1.setColor(Color.BLACK);
//创建bitmap对象
Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawRect(0,0,bitmap.getWidth()+50,bitmap.getHeight()+50,paint);
drawable.setBounds(0,0,canvas.getWidth(),canvas.getHeight());
drawable.draw(canvas);
FileOutputStream fos = new FileOutputStream(file);
//转为jpg格式并写入到sd卡
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
saveResultCallback.onSavedSuccess();
} catch (IOException e) {
e.printStackTrace();
saveResultCallback.onSavedFailed();
}
}else {
try {
//保存jpg格式的图片到相册中
FileOutputStream fos = new FileOutputStream(file);
InputStream fis = context.getAssets().open(url.replace("file:///android_asset/",""));
int len = 0;
byte[] bytes = new byte[1024];
while ((len = fis.read(bytes)) != -1){
fos.write(bytes,0,len);
}
fos.flush();
fis.close();
fos.close();
saveResultCallback.onSavedSuccess();
} catch (FileNotFoundException e) {
saveResultCallback.onSavedFailed();
e.printStackTrace();
} catch (IOException e) {
saveResultCallback.onSavedFailed();
e.printStackTrace();
}
}
//保存图片后发送广播通知更新数据库
Uri uri = Uri.fromFile(file);
context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));
}
}).start();
}
public interface SaveResultCallback{
void onSavedSuccess();
void onSavedFailed();
}
}
用到的第三方开源库:https://github.com/japgolly/svg-android
效果图：
欢迎大家进行交流,指正！
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