Question

我在android MVVM体系结构中经常遇到此错误。我尝试删除.idea，igradle，gradle文件夹，但是它不起作用。我什至尝试使用无效缓存重新启动Studio，这也行不通。请帮助。 >

下面是示例代码

public class TestViewModel extends AndroidViewModel {

    MutableLiveData<String> test = new MutableLiveData<>();

    public TestViewModel(@NonNull Application application) {
        super(application);
    }

    public MutableLiveData<String> getTest() {
        return test;
    }

    public void setTest(MutableLiveData<String> test) {
        this.test = test;
    }
}

和

<?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <data>

        <import type="in.raji.bills.billsreminder.viewmodels.TestViewModel"
            />

        <variable
            name="viewModel"
            type="in.raji.bills.billsreminder.viewmodels.TestViewModel"/>
    </data>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/relativeLayout8"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        tools:context=".MonthlyFragment">

        <EditText
            android:id="@+id/autoCompleteTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:hint="Enter title"
            android:text="@{viewModel.test}"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"/>
    </android.support.constraint.ConstraintLayout>
</layout>

Answer 1

解决方案

LiveData可用作Android Studio 3.1中的可观察字段。这是旧版Android Studio的错误，请更新您的Android Studio。 Check Release Notes。

建议

删除<?php $title = (is_int($_POST['title']) && $_POST['title'] >= 1) ? $_POST['title'] : 0; // This allows you to check whether $_POST['title'] is an integer, if it is 1 or higher. If that is the case, $title will be $_POST['title'], else it will become 0 (zero). // It will also do a check on given $_POST data to prevent false input. if ($title == 3): ?> <input type="file" name="file" accept="image/gif,image/jpeg,image/png,image/jpg" /> <?php else: ?> <input type="file" name="file" accept="application/pdf" /> <?php endif; ?>
您可以将<import type="in.raji.bills.billsreminder.viewmodels.TestViewModel"/>设为私有。

找不到属性“ android：text”的设置器-Android MVVM

1 个答案:

解决方案