我正在使用开发人员网站上的相同代码但在编译时遇到错误。 http://developer.android.com/google/gcm/gs.html
复制下面的代码
private void registerBackground() {
new AsyncTask() {
@Override
protected String doInBackground(Void... params) {
String msg = "";
try {
regid = gcm.register(GCM_SENDER_ID);
msg = "Device registered, registration id=" + regid;
// You should send the registration ID to your server over HTTP,
// so it can use GCM/HTTP or CCS to send messages to your app.
// For this demo: we don't need to send it because the device
// will send upstream messages to a server that will echo back
// the message using the 'from' address in the message.
// Save the regid for future use - no need to register again.
SharedPreferences.Editor editor = prefs.edit();
editor.putString(PROPERTY_REG_ID, regid);
editor.commit();
} catch (IOException ex) {
msg = "Error :" + ex.getMessage();
}
return msg;
}
// Once registration is done, display the registration status
// string in the Activity's UI.
@Override
protected void onPostExecute(String msg) {
mDisplay.append(msg + "\n");
}
}.execute(null, null, null);
}
我在编译时遇到错误“Asynctask是一个原始类型。对泛型类型的引用应该是parameterised。
答案 0 :(得分:9)
您尚未声明泛型类型参数。
变化
new AsyncTask() {
到
new AsyncTask<Void,Void,String>() {
此外,
execute(null, null, null);
可以更改为
execute();