Android数据绑定@BindingConversion失败为int到字符串 [英] Android Data Binding @BindingConversion failure for int to string

问题描述

以下代码适用于浮动字符串：

b

xml：

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

代码：

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

并设置：

  viewModel.number.set（3.14f）; 
  

---

但是，如果我尝试相同的东西 ints to strings 我遇到了一个崩溃。

  public ObservableInt number = new ObservableInt（）; 
  

与

  viewModel.number.set（42）; 
  

我得到以下内容：

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

---

任何想法？
谢谢！

解决方案

android：text code> int 假定 int 是字符串资源ID。使用 android：text =@ {Integer.toString（myViewModel.number）}。

Ran into a mysterious problem when trying to make a @BindingConversion for int to string.
The following code works for floats to strings:

xml:

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

code:

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

and setting:

viewModel.number.set(3.14f);

---

But if I try the same thing for ints to strings I get a crash.

 public ObservableInt number = new ObservableInt();

with

viewModel.number.set(42);

I get the following:

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)

---

Any ideas? Thanks!

解决方案

android:text with an int assumes that the int is a string resource ID. Use android:text="@{Integer.toString(myViewModel.number)}".

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