在设备上打印视图层次结构

时间:2011-07-02 20:45:19

标签: android android-layout

在三星手机上调试我的应用程序时出现奇怪的结果,我没有物理访问权限。我想请用户运行一个检测的应用程序来帮助调试。我的应用程序获得一个view,其中包含一个未知的(对我来说: - )层次结构(ViewGroups等)。有没有办法“走”View并打印到字符串/ ddms View中的所有组件(等等ViewGroups等)?

这类似于HierarchyViewer工具 - 如果我有adb级别的设备访问权限。

更新:我想我可以使用方法

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

来自ViewDebug.java Android操作系统资源......

任何人都有更好的主意吗?

谢谢!

6 个答案:

答案 0 :(得分:31)

这是我刚为此目的而设的实用功能:

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);
        }
    }
}

答案 1 :(得分:10)

我创建了实用工具方法,它以漂亮的印刷方式返回层次结构,并带有人类可读的视图ID。以下是输出的示例:

[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,它确实非常有用

答案 2 :(得分:0)

  

这些视图不是我的,它们来自其他应用程序,因此我无法触及与它们相关的代码(我正在从RemoteView中对它们进行充气)

如果您收到RemoteViews,并且将其应用于活动中的某些内容,则可以直接访问生成的Views,与您自己从XML中对其进行充气的情况完全不同。鉴于根View,它只是走路的孩子(可能是深度优先,但这是你的电话)并记录你想要的任何信息。

答案 3 :(得分:0)

this answer几乎相同,但与Kotlin:

fun getViewTree(root: ViewGroup): String{
    fun getViewDesc(v: View): String{
        val res = v.getResources()
        val id = v.getId()
        return "[${v::class.simpleName}]: " + when(true){
            res == null -> "no_resouces"
            id > 0 -> try{
                res.getResourceName(id)
            } catch(e: android.content.res.Resources.NotFoundException){
                "name_not_found"
            }
            else -> "no_id"
        }
    }

    val output = StringBuilder(getViewDesc(root))
    for(i in 0 until root.getChildCount()){
        val v = root.getChildAt(i)
        output.append("\n").append(
            if(v is ViewGroup){
                getViewTree(v).prependIndent("  ")
            } else{
                "  " + getViewDesc(v)
            }
        )
    }
    return output.toString()
}

答案 4 :(得分:0)

只需从BottomNavigationView中找到菜单项并注册长按即可。

View itemBag = bottomNavigationView.findViewById(R.id.action_bag);
    if (itemBag != null) {
      itemBag.setOnLongClickListener(BottomNavigationActivity.this::onLongClick);
    }

private boolean onLongClick(View v) {
    switch (v.getId()) {
      case R.id.action_bag: {
        showToastMessage(R.string.menu_shopping_bag);
      }
      break;
    }
    return false;
  }

答案 5 :(得分:0)

其他输出的格式令我不满意,有些地方的代码令我不满意。因此,我通过以下方式改进了输出:

/**
 * Prints the view hierarchy.
 */
public static void printViewHierarchy(ViewGroup parent, String intent) {
    for (int i = 0, max = parent.getChildCount(), numLenght = (max + "").length(); i < max; i++) {
        View child = parent.getChildAt(i);
        String childString = child.getClass().getSimpleName() + " " + child.getId();
        String format = "|— %0" + numLenght + "d/%0" + numLenght + "d %s";
        Log.d("debug", intent + String.format(format, i + 1, max, childString));

        if (child instanceof ViewGroup)
            printViewHierarchy((ViewGroup) child, intent + "  ");
    }
}

收件人:

|— 1/4 ScrollView 2131296482
|— 2/4 MaterialTextView 2131296445
|— 3/4 FloatingActionButton 2131296374
|— 4/4 MaterialTextView 2131296363
|— 1/4 ScrollView 2131296482
  |— 1/1 LinearLayout 2129243036
    |— 01/74 RelativeLayout 2131296449
      |— 1/4 MaterialCheckBox 2131296332
      |— 2/4 MaterialTextView 2131296547
      |— 3/4 MaterialTextView 2131296531
      |— 4/4 AppCompatImageButton 2131296462
    |— 02/74 RelativeLayout 2131296449
      |— 1/4 MaterialCheckBox 2131296332
      |— 2/4 MaterialTextView 2131296547
      |— 3/4 MaterialTextView 2131296531
      |— 4/4 AppCompatImageButton 2131296462
    |— ...
    |— 74/74 RelativeLayout 2131296449
      |— 1/4 MaterialCheckBox 2131296332
      |— 2/4 MaterialTextView 2131296547
      |— 3/4 MaterialTextView 2131296531
      |— 4/4 AppCompatImageButton 2131296462
|— 2/4 MaterialTextView 2131296445
|— 3/4 FloatingActionButton 2131296374
|— 4/4 MaterialTextView 2131296363