Question

对于下面发布的布局，我试图遍历整个布局并显示布局中每个视图的ID。我用方法

尝试了下面发布的代码

vg.getId()

但它为布局中的每个视图显示相同的ID

请您告诉我如何在布局中获取每个视图的唯一ID？

输出：

ew_1 I/ActMain: vg.getId() :2131427422
07-02 14:48:25.383 32647-32647/com.example.alteenos.test_traversethroughaview_1 I/ActMain: vg.getId() :2131427422
07-02 14:48:25.383 32647-32647/com.example.alteenos.test_traversethroughaview_1 I/ActMain: vg.getId() :2131427422
07-02 14:48:25.383 32647-32647/com.example.alteenos.test_traversethroughaview_1 I/ActMain: vg.getId() :2131427422

布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/actMain_mainContainer"
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"
tools:context="com.example.altenos.test_traversethroughaview_1.ActMain">

    <Button
        android:id="@+id/actMain_btn_change"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/decision_postponed" />

        <LinearLayout
            android:id="@+id/actMain_linlay_1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <Button
                android:id="@+id/actMain_btn_yes"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/decision_accepted" />
            <Button
                android:id="@+id/actMain_btn_no"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/decision_rejected" />
        </LinearLayout>

        <TextView
            android:id="@+id/actMain_tv_display"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <LinearLayout
            android:id="@+id/actMain_linlay_2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
        </LinearLayout>

码：

private int countViews(ViewGroup vg) {
    int childCount = vg.getChildCount();
    for (int i = 0; i < childCount; i++) {
        Log.i(TAG, "vg.getId() :" + vg.getId());

        //if (vg.getChildAt(i) instanceof ViewGroup) {
            //childCount += countViews((ViewGroup) vg.getChildAt(i));
        //}
    }
    return childCount;
}

Answer 1

您正在记录ViewGroup的ID，而不是孩子。

Answer 2

您应该登录View not ViewGroup

   private int countViews(ViewGroup vg) {
    int childCount = vg.getChildCount();
    for (int i = 0; i < childCount; i++) {
        Log.i(TAG,"vg.getId() :",vg.getChildAt(i).getId());
        //Log.i(TAG, "vg.getId() :" + vg.getId()); Not this one

        //if (vg.getChildAt(i) instanceof ViewGroup) {
            //childCount += countViews((ViewGroup) vg.getChildAt(i));
        //}
    }
    return childCount;
}

如何获得独特的视图ID

2 个答案: