使用 Android 对话框进行数据绑定

Question

我在Activity、Fragment 和RecyclerView 中实现了DataBinding。现在尝试在Dialog 中执行此操作，但对于如何在其中设置自定义视图有点困惑？

这是我为Dialog 实现的代码。

Dialog dialog = new Dialog(context);
dialog.getWindow();

dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));

LayoutTermsBinding termsBinding;

dialog.setContentView(R.layout.layout_terms);
dialog.getWindow().setLayout(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

dialog.show();

我知道如果是Activity，我们可以执行DataBindingUtil.setContentView()，对于Fragment，我们可以执行DataBindingUtil.inflate()，但我对如何将dialog.setContentView(R.layout.layout_terms);转换为DataBinding感到困惑。

Answer 1

假设这样的事情是你的layout_terms.xml:

<layout>
    <data>
        <!--You don't even need to use this one, this is important/necessary for the inflate method -->
        <variable name="testVariable" value="String" /> 
    </data>
    <LinearLayout>
        <TextView />
    </LinearLayout>
</layout>

首先，您需要获取您的Binding。这是通过简单地膨胀来完成的：

/*
* This will only work, if you have a variable or something in your 'layout' tag, 
* maybe build your project beforehand. Only then the inflate method can be found. 
* context - the context you are in. The binding is my activities binding. 
* You can get the root view somehow else.
*/
LayoutTermsBinding termsBinding = LayoutTermsBinding
    .inflate(LayoutInflater.from(context), (ViewGroup) binding.getRoot(), false);

 //without a variable this would be
LayoutTermsBinding termsBinding = DataBindingUtil.
      inflate(LayoutInflater.from(context), R.layout.layout_terms, (ViewGroup) mainBinding.getRoot(), false);

第二步：将你的termsBinding.getRoot()设置为ContentView：

dialog.setContentView(termsBinding.getRoot());

你就完成了。 :)