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!

我有这个对象

ObservableInt someNumber;

public ObservableInt getSomeNumber()
{
    return someNumber;
}

public void setSomeNumber(ObservableInt number)
{
    this.someNumber = number;
}

我的AppCompatEditText在xml代码中是这样的:

<android.support.v7.widget.AppCompatEditText
        android:layout_width="0dp"
        android:layout_height="@dimen/agro_item_height"
        android:layout_weight="1"
        android:inputType="numberDecimal"
        android:text="@={String.valueOf(myObject.someNumber)}"
        android:gravity="center_horizontal"/>

我有这个错误:

Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
java.lang.RuntimeException: failure, see logs for details.
cannot generate view binders java.lang.NullPointerException
at android.databinding.tool.expr.MethodCallExpr.generateCode(MethodCallExpr.java:69)
at android.databinding.tool.expr.Expr.toFullCode(Expr.java:745)
at android.databinding.tool.expr.Expr.assertIsInvertible(Expr.java:767)
at android.databinding.tool.BindingTarget.addInverseBinding(BindingTarget.java:68)
at android.databinding.tool.LayoutBinder.<init>(LayoutBinder.java:228)
at android.databinding.tool.DataBinder.<init>(DataBinder.java:52)
at android.databinding.tool.CompilerChef.ensureDataBinder(CompilerChef.java:83)
at android.databinding.tool.CompilerChef.sealModels(CompilerChef.java:168)
at android.databinding.annotationprocessor.ProcessExpressions.writeResourceBundle(ProcessExpressions.java:149)
at android.databinding.annotationprocessor.ProcessExpressions.onHandleStep(ProcessExpressions.java:82)
at android.databinding.annotationprocessor.ProcessDataBinding$ProcessingStep.runStep(ProcessDataBinding.java:154)
at android.databinding.annotationprocessor.ProcessDataBinding$ProcessingStep.access$000(ProcessDataBinding.java:139)
at android.databinding.annotationprocessor.ProcessDataBinding.process(ProcessDataBinding.java:66)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:794)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:705)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1800(JavacProcessingEnvironment.java:91)
at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1035)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1176) …

在Android中,我们可以@=在变量前面使用双向数据绑定.但是,那个变量是一个double.因此,为了显示它EditText,我需要将其转换为String使用String.valueOf(pojo.value).

如果我=在前面附加双向数据绑定它只是不编译.

如果我附加一个onTextChanged并在那里设置值,我就会失去光标.有没有解决方法？

编辑:

它有效,InverseBindingAdapter但不允许.(句号)输入.