在设备上打印视图层次结构

Question

调试我的应用程序在三星手机上的奇怪结果,我没有物理访问权限.我想请用户运行一个已检测的应用程序来帮助调试.我的应用程序获得了view一个未知(对我来说) - 层次结构(ViewGroups等).有没有办法"走" View并打印到字符串/其中的ddms所有组件View(ViewGroups等等)？

这类似于HierarchyViewer工具 - 如果我有adb对设备的级别访问权限.

更新:我想我可以使用这个方法

void dumpViewHierarchyWithProperties(Context context, ViewGroup group, BufferedWriter out, int level)

来自ViewDebug.javaAndroid OS来源......

谁有更好的主意？

谢谢!

Answer 1

这是我刚为此目的制作的效用函数:

public static void printViewHierarchy(ViewGroup vg, String prefix) {
    for (int i = 0; i < vg.getChildCount(); i++) {
        View v = vg.getChildAt(i);
        String desc = prefix + " | " + "[" + i + "/" + (vg.getChildCount()-1) + "] "+ v.getClass().getSimpleName() + " " + v.getId();
        Log.v("x", desc);

        if (v instanceof ViewGroup) {
            printViewHierarchy((ViewGroup)v, desc);
        }
    }
}

Answer 2

我创建了实用程序方法,它以一种漂亮的打印方式返回层次结构,并带有人类可读的视图ID.以下是输出示例:

[LinearLayout] no_id
  [CardView] com.example:id/card_view
    [RelativeLayout] no_id
      [LinearLayout] com.example:id/image_container
        [AppCompatImageView] com.example:id/incident_icon
        [CustomTextView] com.example:id/road_number
      [RelativeLayout] no_id
        [CustomTextView] com.example:id/distance_to_user
        [CustomTextView] com.example:id/obstruction_title
        [CustomTextView] com.example:id/road_direction
        [CustomTextView] com.example:id/obstruction_description
        [AppCompatImageView] com.example:id/security_related

这是实用方法:

public static String getViewHierarchy(@NonNull View v) {
    StringBuilder desc = new StringBuilder();
    getViewHierarchy(v, desc, 0);
    return desc.toString();
}

private static void getViewHierarchy(View v, StringBuilder desc, int margin) {
    desc.append(getViewMessage(v, margin));
    if (v instanceof ViewGroup) {
        margin++;
        ViewGroup vg = (ViewGroup) v;
        for (int i = 0; i < vg.getChildCount(); i++) {
            getViewHierarchy(vg.getChildAt(i), desc, margin);
        }
    }
}

private static String getViewMessage(View v, int marginOffset) {
    String repeated = new String(new char[marginOffset]).replace("\0", "  ");
    try {
        String resourceId = v.getResources() != null ? (v.getId() > 0 ? v.getResources().getResourceName(v.getId()) : "no_id") : "no_resources";
        return repeated + "[" + v.getClass().getSimpleName() + "] " + resourceId + "\n";
    } catch (Resources.NotFoundException e) {
        return repeated + "[" + v.getClass().getSimpleName() + "] name_not_found\n";
    }
}

提示:我们使用此方法将视图层次结构添加到某些崩溃报告中.在某些情况下,这确实很有帮助.