在ViewStub Android中查找控件

时间:2018-09-11 01:29:23

标签: android viewstub

我有一个片段,我想使用ViewStub来存储一些数据。

我遇到的问题是,一旦我从片段Java类中扩展了ViewStub,如何在ViewStub中的片段Java类组件中进行引用?

例如,当组件处于片段的膨胀视图中时,我当前正在使用;

TextView txtAwayPenStat = (TextView) myResInfoView.findViewById(R.id.txtAwayPenStat);

如果将txtAwayPenStat移到ViewStub,则此操作将无效。

我尝试了几种方法;

        ViewStub viewStub = (ViewStub) getActivity().findViewById(R.id.info_detail_stub);
        View inflatedView = viewStub.inflate();

在哪里getActivity()我也尝试过getView()。

1 个答案:

答案 0 :(得分:1)

您可以这样:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ViewStub stub = (ViewStub) findViewById(R.id.stub);
        View inflated = stub.inflate();
        TextView txtAwayPenStat = (TextView) inflated.findViewById(R.id.txtAwayPenStat);
        txtAwayPenStat.setText("gdgad");
    }

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    >

    <ViewStub
        android:id="@+id/stub" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout="@layout/mysubtree" 
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        />

</android.support.constraint.ConstraintLayout>

mysubtree.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    >

    <TextView
        android:id="@+id/txtAwayPenStat"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="HELLO WORLD"
        ></TextView>

</android.support.constraint.ConstraintLayout>

android:layout标签中的ViewStub属性是对视图的引用,该视图将在inflate()调用之后被夸大。