Java 如何修复androidx.appcompat.widget.AppCompatButton无法转换为com.rey.material.widget.Button
我正在构建一个类似亚马逊的应用程序。对loginactivity进行编码后，我无法从mainactivity访问它，因为它总是崩溃 这是我的loginactivity.javaJava 如何修复androidx.appcompat.widget.AppCompatButton无法转换为com.rey.material.widget.Button,java,android,android-layout,runtime-error,Java,Android,Android Layout,Runtime Error,我正在构建一个类似亚马逊的应用程序。对loginactivity进行编码后，我无法从mainactivity访问它，因为它总是崩溃 这是我的loginactivity.java public class loginActivity extends AppCompatActivity { private EditText InputPhoneNumber, InputPassword; private Button LoginButtonPage; private Prog
public class loginActivity extends AppCompatActivity
{
private EditText InputPhoneNumber, InputPassword;
private Button LoginButtonPage;
private ProgressDialog loadingBar;
private String parentDbname = "Users";
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
LoginButtonPage = findViewById(R.id.page_login_btn);
InputPhoneNumber = findViewById(R.id.login_phone_number_input);
InputPassword = findViewById(R.id.login_password_input);
loadingBar = new ProgressDialog(this);
LoginButtonPage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
LoginUser();
}
});
}
private void LoginUser()
{
String phone =InputPhoneNumber.getText().toString();
String password =InputPassword.getText().toString();
if (TextUtils.isEmpty(phone))
{
Toast.makeText(this,"Please Write Your Phone Number...", Toast.LENGTH_SHORT).show();
}
else if (TextUtils.isEmpty(password))
{
Toast.makeText(this,"Please Write Your Password...", Toast.LENGTH_SHORT).show();
}
else
{
loadingBar.setTitle("Login Account");
loadingBar.setMessage("Please Wait, while we are checking the credentials.");
loadingBar.setCanceledOnTouchOutside(false);
loadingBar.show();
AllowAccessToAccount(phone, password);
}
}
private void AllowAccessToAccount(final String phone, final String password)
{
final DatabaseReference RootRef;
RootRef = FirebaseDatabase.getInstance().getReference();
RootRef.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot)
{
if (dataSnapshot.child(parentDbname).child(phone).exists())
{
Users usersData = dataSnapshot.child(parentDbname).child(phone).getValue(Users.class);
assert usersData != null;
if (usersData.getPhone().equals(phone))
{
if (usersData.getPassword().equals(password))
{
Toast.makeText(loginActivity.this, "logged in successfully...", Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
Intent intent = new Intent(loginActivity.this, HomeActivity.class);
Prevalent.currentOnlineUser = usersData;
startActivity(intent);
}
else
{
loadingBar.dismiss();
Toast.makeText(loginActivity.this, "Password is incorrect", Toast.LENGTH_SHORT).show();
}
}
}
else
{
Toast.makeText(loginActivity.this, "Account with this" + phone + "number do not exists", Toast.LENGTH_SHORT).show();
loadingBar.dismiss();
Toast.makeText(loginActivity.this, "you need to create a new account", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError)
{
}
});
}
}
<RelativeLayout 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"
android:background="@color/orange"
tools:context=".loginActivity">
<ImageView
android:id="@+id/login_applogo"
android:layout_width="300dp"
android:layout_height="100dp"
android:src="@drawable/applogo"
android:layout_centerHorizontal="true"
android:layout_marginTop="170dp"
/>
<EditText
android:id="@+id/login_phone_number_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/login_applogo"
android:background="@drawable/input_design"
android:padding="20dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:hint="Phone Number"
android:inputType="number"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="17sp"
android:textStyle="bold"
/>
<EditText
android:id="@+id/login_password_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/login_phone_number_input"
android:background="@drawable/input_design"
android:padding="20dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="6dp"
android:hint="Password"
android:inputType="textPassword"
android:textColor="@color/black"
android:textColorHint="@color/black"
android:textSize="17sp"
android:textStyle="bold"
/>
<LinearLayout
android:id="@+id/linear_layout_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="@id/login_password_input"
android:layout_marginTop="5dp"
>
<CheckBox
android:id="@+id/remember_me_checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/Material.Drawable.CheckBox"
android:text="Remember Me"
android:textColor="@color/black"
app:cbd_strokeColor="@color/black"
android:gravity="center_vertical"
android:textSize="16sp"
android:textStyle="bold"
android:layout_marginLeft="17dp"
/>
<TextView
android:id="@+id/forget_password_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Forgot Password?"
android:textColor="@color/black"
android:textSize="17sp"
android:textStyle="bold"
android:layout_marginLeft="80dp"
/>
</LinearLayout>
<Button
android:id="@+id/page_login_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/linear_layout_1"
android:layout_marginTop="5dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:background="@drawable/loginbutton"
android:padding="17dp"
android:textAllCaps="false"
android:textSize="18sp"
android:text="Login"
android:textColor="@color/black"
/>
<TextView
android:id="@+id/admin_panel_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="I'm an Admin"
android:layout_alignParentEnd="true"
android:layout_below="@+id/page_login_btn"
android:textColor="@color/black"
android:textSize="20sp"
android:textStyle="bold"
android:layout_marginLeft="80dp"
android:layout_marginEnd="23dp"
/>
<TextView
android:id="@+id/not_admin_panel_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="I'm an not Admin"
android:layout_alignParentStart="true"
android:layout_below="@+id/page_login_btn"
android:textColor="@color/black"
android:textSize="20sp"
android:textStyle="bold"
android:layout_marginLeft="80dp"
android:layout_marginStart="25dp"
android:visibility="invisible"
/>
</RelativeLayout>
尝试将com.rey.material.widget.Button导入更改为androidx.appcompat.widget.AppCompatButton尝试使用“用户”而不是parentDbName。
如果firebase中存在（dataSnapshot.child（“用户”）.child（phone.exists（）），则您正在为管理员创建帐户，请将firebase中的电话号码从电话号码：9999999999更改为电话号码：“99999999999”。表示在姓名、电话和密码中添加双引号（“）
如果您没有在firebase中输入双引号，则数据是长数据类型。但是java文件希望所有数据都是字符串值。看起来您在
loginActivity按钮是com.rey.material.widget.Button
，但布局中的
最终将成为androidx.appcompat.widget.AppCompatButton
。根据实际需要，将导入更改为导入android.widget.Button；
，或将XML标记更改为
。