Android 根据网络图片URL转Bitmap对象

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Android 4.0之后不能在主线程中做网络请求

我找了很多方法，才解决
Android之NetworkOnMainThreadException异常

是指不能在主线程中做网络请求

代码如下：

 new Thread(new Runnable() {            Bitmap bitmap = null;            @Override            public void run() {                URL url = null;                try {                    url = new URL("http://test.zuihou99.com" + urls);                    InputStream is = null;                    BufferedInputStream bis = null;                    try {                        is = url.openConnection().getInputStream();                        bis = new BufferedInputStream(is);                        bitmap = BitmapFactory.decodeStream(bis);                        boolean isSaveSuccess = ImgUtils.saveImageToGallery(getApplicationContext(), bitmap);                        if (isSaveSuccess) {                            Looper.prepare();                            Toast.makeText(getApplicationContext(), "保存图片成功", Toast.LENGTH_SHORT).show();                            Looper.loop();                        } else {                            Looper.prepare();                            Toast.makeText(getApplicationContext(), "保存图片失败，请稍后重试", Toast.LENGTH_SHORT).show();                            Looper.loop();                        }                    } catch (IOException e) {                        e.printStackTrace();                    }                } catch (MalformedURLException e) {                    e.printStackTrace();                }            }        }).start();

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