相关疑难解决方法(0)

尝试为int创建一个@BindingConversion时遇到一个神秘的问题.
以下代码适用于浮点数到字符串:

XML:

...
<variable
        name="myViewModel"
        type="... .SomeModel" />
...
<TextView
            style="@style/StyleStuff"
            android:text="@{myViewModel.number}" />

码:

public class SomeModel {
    public ObservableFloat number = new ObservableFloat();
}

和设置:

viewModel.number.set(3.14f);

但是,如果我尝试对字符串进行同样的操作,我会崩溃.

 public ObservableInt number = new ObservableInt();

同

viewModel.number.set(42);

我得到以下内容:

FATAL EXCEPTION: main
Process: ...myapplication, PID: 14311
android.content.res.Resources$NotFoundException: String resource ID #0xfa0
    at android.content.res.Resources.getText(Resources.java:1123)
    at android.support.v7.widget.ResourcesWrapper.getText(ResourcesWrapper.java:52)
    at android.widget.TextView.setText(TextView.java:4816)
    at ...executeBindings(ActivityAdaptersBinding.java:336)
    at android.databinding.ViewDataBinding.executePendingBindings(ViewDataBinding.java:355)

有任何想法吗？谢谢!

在Yigit博伊尔和乔治·芒特对Android的数据绑定的谈话,他们说明它是多么容易绑定到TextWatcher的onTextChanged(在13:41).在按钮上.他们的幻灯片错了吗？首先,ButtonView没有onTextChanged属性.它既没有setOnTextChanged方法.也没有EditText.但他们都有addTextChangedListener一个TextWatcher输入.

那他们在说什么呢？他们是如何做到的呢？他们的示例代码无法编译,但会出现此错误:

Error:(17) No resource identifier found for attribute 'onTextChanged' in package 'android'

如何使用Android Databinding框架绑定到任何View或特别是EditText上的"Text Changed Event"？

我在使用Integer数据类型实现双向绑定时遇到了一些问题.

public class User {

    private String firstName;
    private String lastName;
    private int age;

    public User() {}

    public void setFirstName(String firstName) {
       this.firstName = firstName;
    }

    public String getFirstName() {
       return this.firstName;
    }

    public void setLastName(String lastName) {
       this.lastName = lastName;
    }

    public String getLastName() {
       return this.lastName;
    }

    public void setAge(int age) {
       this.age = age;
    }

    public int getAge() {
       return this.age;
    }

}

XML:

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data class="UserDataBinding">
        <variable
            name="user"
            type="com.databinding.model.User" />
    </data>

    <LinearLayout …

当我尝试运行我的应用程序时出现以下错误:

Error:Execution failed for task ':app:compileDevelopmentDebugJavaWithJavac'.
> java.lang.RuntimeException: Found data binding errors.
****/ data binding error ****msg:Could not find accessor java.lang.String.giftRecipientName redacted.xml loc:182:63 - 182:93 ****\ data binding error ****

我有一个Order对象,如下所示:

public class Order {
    public Address address;
    // unrelated fields and methods
}

嵌套的Address对象如下所示:

public class Address {
    public String addressLine1;
    public String addressLine2;
    public String giftRecipientName;
    public Boolean isGift;
}

在我的.xml中,我正在执行以下操作:

<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>
        <variable name="order" type="example.redacted.models.Order"/>
    </data>
    // widgets and whatnot
    <TextView
        android:id="@+id/gift_recipientTV"
        android:layout_column="1"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:textStyle="bold" …