最近项目上有这样一个需求，需要分享网络图片到微信，在网上查阅了相关资料，然后结合自己的思路，总结了一下实现的具体流程：
1、将网络图片下载下来，转换成Bitmap：
/**
* @param path 网络图片地址
*/
public Bitmap getBitmap(String path) {
try {
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(5000);
conn.setRequestMethod("GET");
if (conn.getResponseCode() == 200) {
InputStream inputStream = conn.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
return bitmap;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
2、将Bitmap格式的文件保存在本地：
/**
* 保存文件
*/
public void saveFile(Bitmap bm) throws IOException {
File sd = Environment.getExternalStorageDirectory();
File dirFile = new File(sd.getPath() + "/Download/imgurl.jpg");
FileOutputStream fos;
fos = new FileOutputStream(dirFile);
if (fos!=null ) {
bm.compress(Bitmap.CompressFormat.JPEG, 50, fos);
fos.flush();
fos.close();
}
}
3、调用系统分享：
private Uri U;
private void shareCode() {
File sd = Environment.getExternalStorageDirectory();
String path = sd.getPath() + "/Download/imgurl.jpg";
File file = new File(path);
if (Build.VERSION.SDK_INT < 24) {
U = Uri.fromFile(file);
} else {
//android 7.0及以上权限适配
U= FileProvider.getUriForFile(this,
"cn.izis.whteachtest.provider",
file);
}
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("image/*");
intent.putExtra(Intent.EXTRA_SUBJECT, "分享");
intent.putExtra(Intent.EXTRA_STREAM, U);
startActivity(Intent.createChooser(intent, getTitle()));
}
