如何修复 androidx.appcompat.widget.AppCompatButton 无法转换为 com.rey.material.widget.Button [英] How to fix androidx.appcompat.widget.AppCompatButton cannot be cast to com.rey.material.widget.Button

问题描述

我正在构建一个类似亚马逊的应用程序.在对 loginactivity 进行编码后，我无法从 mainactivity 访问它，因为它总是崩溃

I'm building a amazon like app. after coding the loginactivity I can't access it from mainactivity because it always crashes

这是我的 loginactivity.java

this is my loginactivity.java

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)
            {

            }
        });
    }
}

这是我的登录活动布局

<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>

然后我收到此错误

E/AndroidRuntime:致命异常:main进程:com.infinite.fastfood，PID:12305java.lang.RuntimeException: 无法启动活动 ComponentInfo{com.infinite.fastfood/com.infinite.fastfood.loginActivity}:java.lang.ClassCastException:androidx.appcompat.widget.AppCompatButton 不能转换为com.rey.material.widget.Button在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)在 android.app.ActivityThread.-wrap12(ActivityThread.java)在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)在 android.os.Handler.dispatchMessage(Handler.java:102)在 android.os.Looper.loop(Looper.java:154)在 android.app.ActivityThread.main(ActivityThread.java:6077)在 java.lang.reflect.Method.invoke(Native Method)在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)引起:java.lang.ClassCastException: androidx.appcompat.widget.AppCompatButton 不能转换为com.rey.material.widget.Button在 com.infinite.fastfood.loginActivity.onCreate(loginActivity.java:36)在 android.app.Activity.performCreate(Activity.java:6662)在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)在 android.app.ActivityThread.-wrap12(ActivityThread.java)在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)在 android.os.Handler.dispatchMessage(Handler.java:102)在 android.os.Looper.loop(Looper.java:154)在 android.app.ActivityThread.main(ActivityThread.java:6077)在 java.lang.reflect.Method.invoke(Native Method)在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.infinite.fastfood, PID: 12305 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.infinite.fastfood/com.infinite.fastfood.loginActivity}: java.lang.ClassCastException: androidx.appcompat.widget.AppCompatButton cannot be cast to com.rey.material.widget.Button at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) Caused by: java.lang.ClassCastException: androidx.appcompat.widget.AppCompatButton cannot be cast to com.rey.material.widget.Button at com.infinite.fastfood.loginActivity.onCreate(loginActivity.java:36) at android.app.Activity.performCreate(Activity.java:6662) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)  at android.app.ActivityThread.-wrap12(ActivityThread.java)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:154)  at android.app.ActivityThread.main(ActivityThread.java:6077)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

推荐答案

尝试将 com.rey.material.widget.Button 导入更改为 androidx.appcompat.widget.AppCompatButton

Try changing com.rey.material.widget.Button import to androidx.appcompat.widget.AppCompatButton

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