我正在尝试设置editText和Button以允许用户通过Parse重设密码。我已经做了一些研究,并且继续从Parse文档中返回以下示例代码。我应该用由当前用户组成的字符串替换“ [email protected]”吗?如何收集当前用户并放在括号中的最佳方法是什么?
Parse.User.requestPasswordReset("[email protected]")
.then(() => {
// Password reset request was sent successfully
}).catch((error) => {
// Show the error message somewhere
alert("Error: " + error.code + " " + error.message);
});
我正在尝试在emailEditText中捕获用户电子邮件,并将其插入reset方法。我不断收到有关ParseUser代码行的错误。感谢您提供的任何帮助,谢谢。
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference
at com.example.AdventureGuideV2.ForgotPasswordActivity.onClick(ForgotPasswordActivity.java:42)
第42行,下面的代码片段中包含ParuseUser语句的行:
public class ForgotPasswordActivity extends AppCompatActivity implements View.OnClickListener {
EditText emailEditText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_forgot_password);
setTitle("Forgot Password");
}
@Override
public void onClick(View view) {
ParseUser.requestPasswordResetInBackground(emailEditText.getText().toString(), new RequestPasswordResetCallback() {
@Override
public void done(ParseException e) {
if (e == null){
//send email
}else {
}
}
});
}
}
这是我的Xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ForgotPasswordActivity">
<EditText
android:id="@+id/emailEditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/enteryouremail"
android:inputType="textPersonName"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:onClick="onClick"
android:text="@string/submit"
android:textAllCaps="false"
android:textColor="@android:color/black"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/emailEditText" />
</androidx.constraintlayout.widget.ConstraintLayout>
问题是,您还没有正确初始化EditText
,错过了绑定。
尝试将以下代码添加到onCreate()
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_forgot_password);
emailEditText = (EditText)findViewById(R.id.emailEditText); //add here
setTitle("Forgot Password");
}