打印
Android
中
View
树的层次结构。
View
本身是多叉树的实现，所以通过递归循环遍历即可。
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/tv_result"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</FrameLayout>
</LinearLayout>
</ScrollView>
<Button
android:id="@+id/print_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="打印View Tree"
android:textAllCaps="false" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
public class Solution {
* 打印VIewTree的层次结构
* @param root view
* @param deep 层级 用于缩进的
private String getViewTreeStr(View root, int deep) {
StringBuilder builder = new StringBuilder();
if (root != null) {
builder.append(getSpace(deep)).append("<").append(root.getClass().getSimpleName());
if (root instanceof ViewGroup) {
builder.append(">\n\n");
int childCount = ((ViewGroup) root).getChildCount();
for (int i = 0; i < childCount; i++) {
builder.append(getViewTreeStr(((ViewGroup) root).getChildAt(i), deep + 1));
builder.append(getSpace(deep)).append("</").append(root.getClass().getSimpleName()).append(">\n");
} else {
builder.append("/>\n");
builder.append("\n");
return builder.toString();
private static String SPACE = "\t";
private String getSpace(int deep) {
StringBuilder s = new StringBuilder();
for (int i = 0; i < deep; i++) {
s.append(SPACE);
return s.toString();