Question

我有一个简单的布局，包括2个textview和2个edittexts，以及一对旋转器。我的问题是，根据第一个微调器的值，我想显示或隐藏某些视图或更改某些标签上的文本。我的实现工作正常，只要每当调用setVisible（View.INVISIBLE）时，edittext和textview实际上不会消失，直到我点击屏幕上的其他内容。一旦我点击，例如，我没有隐藏的编辑文本，我想隐藏的视图将继续并消失。我曾尝试在他们身上调用invalidate（），因为我已在其他帖子中看到刷新视图但它无效。我已经发布了下面的XML布局和相关的java代码。所有帮助表示赞赏。

XML布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
              android:orientation="vertical"
              android:paddingBottom="@dimen/activity_vertical_margin"
              android:paddingLeft="@dimen/activity_horizontal_margin"
              android:paddingRight="@dimen/activity_horizontal_margin"
              android:paddingTop="@dimen/activity_vertical_margin"
              app:layout_behavior="@string/appbar_scrolling_view_behavior"
              tools:context="com.greg.android.youcast.FieldDisplayActivity"
              tools:showIn="@layout/activity_field_display">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp">

        <Spinner
            android:id="@+id/run_or_play_spinner"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/passer_name_text_view"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.4"
            android:text="@string/passer_name_label"/>

        <EditText
            android:id="@+id/passer_name_edit_text"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.6"
            android:hint="@string/passer_name_edit_text"/>


    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="horizontal">


        <TextView
            android:id="@+id/receiver_name_text_view"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.4"

            android:text="@string/receiver_name_label"/>

        <EditText
            android:id="@+id/receiver_name_edit_text"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.6"
            android:hint="@string/receiver_name_edit_text"/>

    </LinearLayout>


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/yards_gained_text_view"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.4"
            android:text="@string/yards_gained"/>

        <Spinner
            android:id="@+id/yards_spinner"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.6"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp">

        <Button
            android:id="@+id/submit_play_button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="@string/submit_play_button"/>
    </LinearLayout>


</LinearLayout>

和相关的java代码：

...
runOrPlaySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String choice = (String) parent.getItemAtPosition(position);
                if (choice.equals("Run")) {
                    setRunPlayUIFields();
                } else if (choice.equals("Pass")) {
                    setPassPlayUIFields();
                }

            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {}

        });

....
private void setRunPlayUIFields() {
        passerNameLabel.setText("Runner Name: ");
        receiverNameField.setVisibility(View.INVISIBLE);
        receiverNameLabel.setVisibility(View.INVISIBLE);
        receiverNameField.refreshDrawableState();
        passerNameField.setHint("Runner Name");
        this.receiverNameField.invalidate();
        this.receiverNameLabel.invalidate();
    }

    private void setPassPlayUIFields() {
        passerNameLabel.setText(R.string.passer_name_label);
        receiverNameLabel.setVisibility(View.VISIBLE);
        receiverNameField.setVisibility(View.VISIBLE);
        passerNameField.setHint("Passer Name");
        this.receiverNameField.invalidate();
        this.receiverNameLabel.invalidate();
    }

Answer 1

在您的XML布局中，进行设置以便设置

android:id="@+id/receiver_name_text_view" 拥有的财产 android:visibility="visible"

您可以尝试，或者如果您愿意，可以尝试使用Java代码 - 执行以下操作：

receiverNameField.setAlpha(0.0f);让它不可见

receiverNameField.setAlpha(1.0f);使其可见

textView和editText上的android setVisible没有立即生效

1 个答案: