从facebook Android成功登录时切换活动
从facebook Android成功登录时切换活动
提问于 2017-03-21 13:33:01
我正在尝试从facebook登录。它是成功的，但当我尝试切换活动时，它并没有发生。它只显示带有注销选项的按钮。
下面是我的代码
fbLogin=(LoginButton)findViewById(R.id.login_button);
fbLogin.setReadPermissions(Arrays.asList("email"));
fbLogin.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
AccessToken accessToken = loginResult.getAccessToken();
System.out.println(" accesstoken= " + accessToken);
Profile profile = Profile.getCurrentProfile();
GraphRequest request = GraphRequest.newMeRequest(
loginResult.getAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
Log.v("LoginActivity", response.toString());
JSONObject json = response.getJSONObject();
try {
email1 = json.getString("email");
Toast.makeText(Login_Activity.this, "email is" + email1, Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "id,name,email");
request.setParameters(parameters);
request.executeAsync();
displayMessage(profile);
}
@Override
public void onCancel() {
Toast.makeText(Login_Activity.this, "Login Canceled", Toast.LENGTH_SHORT).show();
}
@Override
public void onError(FacebookException e) {
Toast.makeText(Login_Activity.this, "Cannot connect.. Facebook error!!", Toast.LENGTH_SHORT).show();
}
});下面是切换活动的函数
private void displayMessage(Profile profile){
if(profile != null) {
mail.setText(email1);
session.createUserLoginSession(true, "FB");
FGname=profile.getName();
FGimage=String.valueOf(profile.getProfilePictureUri(100, 100));
FGemail= email1;
gv.setEmail(email1);
Toast.makeText(Login_Activity.this, "display profile executed", Toast.LENGTH_SHORT).show();
new AsynDataClassFbGoogleLogin().execute();
}
else
{
}
}此外，当我再次启动应用程序时，登录已成功完成。
回答 2
Stack Overflow用户
回答已采纳
发布于 2017-03-21 13:51:24
您需要使用Intent来切换活动：
private void displayMessage(Profile profile){
if(profile != null) {
mail.setText(email1);
session.createUserLoginSession(true, "FB");
FGname=profile.getName();
FGimage=String.valueOf(profile.getProfilePictureUri(100, 100));
FGemail= email1;
gv.setEmail(email1);
Toast.makeText(Login_Activity.this, "display profile executed", Toast.LENGTH_SHORT).show();
new AsynDataClassFbGoogleLogin().execute();
//This code is what switches activities
Intent i = new Intent(this, NewActivity.class);
startActivity(i);
}
else
{
}}
您还需要确保将新活动添加到清单中：
<activity
android:name=".NewActivity"
android:theme="@style/AppTheme.NoActionBar">
</activity>您可以在此处阅读有关活动的信息：https://developer.android.com/guide/components/activities/index.html
Stack Overflow用户
发布于 2017-03-21 13:44:54
Just add an intent to switch to another activity in onCompleted callback as follows :
GraphRequest request = GraphRequest.newMeRequest(
loginResult.getAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
Log.v("LoginActivity", response.toString());
JSONObject json = response.getJSONObject();
try {
email1 = json.getString("email");
Toast.makeText(Login_Activity.this, "email is" + email1, Toast.LENGTH_SHORT).show();
// switch to another activity after successful login
Intent intent = new Intent(LoginActivity.this, AnotherActivity.class);
startActivity(intent);
} catch (JSONException e) {
e.printStackTrace();
}
}
});页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/42919110
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