无法将TextInputEditText强制转换为TextInputLayout [英] TextInputEditText cannot be cast to TextInputLayout

问题描述

我的活动中包含此代码

public class RegisterActivity extends AppCompatActivity {


private static final String TAG = RegisterActivity.class.getSimpleName();
private TextInputLayout mDisplayName;
private TextInputLayout mEmail;
private TextInputLayout mPassword;
private Button mCreateBtn;

private FirebaseAuth mAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_register);

    mAuth = FirebaseAuth.getInstance();

    mDisplayName = (TextInputLayout)findViewById(R.id.reg_display_name);
    mEmail = (TextInputLayout)findViewById(R.id.reg_email);
    mPassword = (TextInputLayout)findViewById(R.id.reg_password);
    mCreateBtn = (Button) findViewById(R.id.reg_create_btn);

    mCreateBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String displayName = mDisplayName.getEditText().getText().toString();
            String email = mEmail.getEditText().getText().toString();
            String password = mPassword.getEditText().getText().toString();

            registerUser(displayName,email,password);

        }


    });
}

private void registerUser(String displayName, String email, String password) {

   mAuth.signInWithEmailAndPassword(email,password)
           .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
               @Override
               public void onComplete(@NonNull Task<AuthResult> task) {
                     if(task.isSuccessful()){
                         Intent mainIntent = new Intent(RegisterActivity.this,MainActivity.class);
                         startActivity(mainIntent);
                         finish();
                     }else{
                         Toast.makeText(RegisterActivity.this,"You got some error.",Toast.LENGTH_SHORT).show();
                     }
               }
           });

}


}

对应的XML代码是:

<android.support.design.widget.TextInputLayout
    android:id="@+id/textInputLayout2"
    android:layout_width="368dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <android.support.design.widget.TextInputEditText
        android:id="@+id/reg_display_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="hint"
        android:text="Display name" />
</android.support.design.widget.TextInputLayout>

<android.support.design.widget.TextInputLayout
    android:id="@+id/textInputLayout3"
    android:layout_width="368dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/textInputLayout2">

    <android.support.design.widget.TextInputEditText
        android:id="@+id/reg_email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="hint"
        android:text="Email" />
</android.support.design.widget.TextInputLayout>

<android.support.design.widget.TextInputLayout
    android:id="@+id/textInputLayout4"
    android:layout_width="368dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/textInputLayout3">

    <android.support.design.widget.TextInputEditText
        android:id="@+id/reg_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="hint"
        android:text="Password" />
</android.support.design.widget.TextInputLayout>

<Button
    android:id="@+id/reg_create_btn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:text="Create account"
    android:textAllCaps="false"
    app:layout_constraintTop_toBottomOf="@+id/textInputLayout4"
    tools:layout_editor_absoluteX="255dp" />

尽管我运行该应用程序时仍收到以下消息:

When I run the app though I get this message:

Caused by: java.lang.ClassCastException: android.support.design.widget.TextInputEditText cannot be cast to android.support.design.widget.TextInputLayout

如果您的设计版本有问题，我也会给您gradle文件.

I am also giving you the gradle file just in case there is something wrong with the design version.

 apply plugin: 'com.android.application'

 android {
 compileSdkVersion 27
 defaultConfig {
    applicationId "theo.tziomakas.lapitchat"
    minSdkVersion 21
    targetSdkVersion 27
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner 
    "android.support.test.runner.AndroidJUnitRunner"
  }
   buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
   }
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support:design:27.1.1'
implementation 'com.android.support.constraint:constraint- 
layout:1.1.0'
implementation 'com.google.firebase:firebase-auth:11.6.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 
'com.android.support.test.espresso:espresso-core:3.0.2'
 }

 apply plugin: 'com.google.gms.google-services'

那么有什么主意如何解决该异常?

So any ideas how to fix that exception?

谢谢西奥.

推荐答案

尝试转换为

private TextInputEditText mDisplayName;
private TextInputEditText mEmail;
private TextInputEditText mPassword;


mDisplayName = (TextInputEditText)findViewById(R.id.reg_display_name);
mEmail = (TextInputEditText)findViewById(R.id.reg_email);
mPassword = (TextInputEditText)findViewById(R.id.reg_password);

这篇关于无法将TextInputEditText强制转换为TextInputLayout的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！