Android 4层可扩展列表视图-第4层在第2层下方打开，不'；不要移动它_Android_Android Layout

Android 4层可扩展列表视图-第4层在第2层下方打开，不'；不要移动它

android android-layout

Android 4层可扩展列表视图-第4层在第2层下方打开，不'；不要移动它,android,android-layout,Android,Android Layout,我一直在尝试创建一个简单的4级可扩展列表视图。它适用于3级，但当我加上4级时，它就搞砸了。第四级列表打开，但仅移动第三级列表，而不是第二级和第一级列表。所以第四级和第三级列表在第二级下消失这是我的密码 public class MainActivity extends AppCompatActivity { public static final int FIRST_LEVEL_COUNT = 5; public static final int SECOND_LEVEL_C

我一直在尝试创建一个简单的4级可扩展列表视图。它适用于3级，但当我加上4级时，它就搞砸了。第四级列表打开，但仅移动第三级列表，而不是第二级和第一级列表。所以第四级和第三级列表在第二级下消失

这是我的密码

public class MainActivity extends AppCompatActivity {

    public static final int FIRST_LEVEL_COUNT = 5;
    public static final int SECOND_LEVEL_COUNT = 5;
    public static final int THIRD_LEVEL_COUNT = 5;
    public static final int FOURTH_LEVEL_COUNT = 5;
    private ExpandableListView expandableListView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        expandableListView = (ExpandableListView) findViewById(R.id.mainList);
        expandableListView.setAdapter(new ParentLevel(this));
    }


    /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // Parent(First) Level




    public class ParentLevel extends BaseExpandableListAdapter {

        private Context context;

        public ParentLevel(Context context) {
            this.context = context;
        }

        @Override
        public Object getChild(int arg0, int arg1) {
            return arg1;
        }

        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            SecondLevelExpandableListView secondLevelELV = new SecondLevelExpandableListView(MainActivity.this);
            secondLevelELV.setAdapter(new SecondLevelAdapter(context));
            secondLevelELV.setGroupIndicator(null);
            return secondLevelELV;
        }

        @Override
        public int getChildrenCount(int groupPosition) {
            return SECOND_LEVEL_COUNT;
        }

        @Override
        public Object getGroup(int groupPosition) {
            return groupPosition;
        }

        @Override
        public int getGroupCount() {
            return FIRST_LEVEL_COUNT;
        }

        @Override
        public long getGroupId(int groupPosition) {
            return groupPosition;
        }

        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_first, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                text.setText("FIRST LEVEL");
            }
            return convertView;
        }

        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }
    }





    /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // Second Level


    public class SecondLevelExpandableListView extends ExpandableListView {

        public SecondLevelExpandableListView(Context context) {
            super(context);
        }

        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            //999999 is a size in pixels. ExpandableListView requires a maximum height in order to do measurement calculations.
            heightMeasureSpec = MeasureSpec.makeMeasureSpec(999999, MeasureSpec.AT_MOST);
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }





    public class SecondLevelAdapter extends BaseExpandableListAdapter {

        private Context context;

        public SecondLevelAdapter(Context context) {
            this.context = context;
        }

        @Override
        public Object getGroup(int groupPosition) {
            return groupPosition;
        }

        @Override
        public int getGroupCount() {
            return 1;
        }

        @Override
        public long getGroupId(int groupPosition) {
            return groupPosition;
        }

        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {

            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_second, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                text.setText("SECOND LEVEL");
            }
            return convertView;
        }

        @Override
        public Object getChild(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            ThirdLevelExpandableListView thirdLevelELV = new ThirdLevelExpandableListView(MainActivity.this);
            thirdLevelELV.setAdapter(new ThirdLevelAdapter(context));
            thirdLevelELV.setGroupIndicator(null);
            return thirdLevelELV;

        }

        @Override
        public int getChildrenCount(int groupPosition) {
            return THIRD_LEVEL_COUNT;
        }

        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }
    }

    /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // Third Level


    public class ThirdLevelExpandableListView extends ExpandableListView {

        public ThirdLevelExpandableListView(Context context) {
            super(context);
        }

        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            //999999 is a size in pixels. ExpandableListView requires a maximum height in order to do measurement calculations.
            heightMeasureSpec = MeasureSpec.makeMeasureSpec(999999, MeasureSpec.AT_MOST);
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

    public class ThirdLevelAdapter extends BaseExpandableListAdapter {

        private Context context;

        public ThirdLevelAdapter(Context context) {
            this.context = context;
        }

        @Override
        public Object getGroup(int groupPosition) {
            return groupPosition;
        }

        @Override
        public int getGroupCount() {
            return 1;
        }

        @Override
        public long getGroupId(int groupPosition) {
            return groupPosition;
        }

        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_third, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                text.setText("THIRD LEVEL");
            }
            return convertView;
        }

        @Override
        public Object getChild(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {

            FourthLevelExpandableListView fourthLevelELV = new FourthLevelExpandableListView(MainActivity.this);
            fourthLevelELV.setAdapter(new FourthLevelAdapter(context));
            fourthLevelELV.setGroupIndicator(null);
            return fourthLevelELV;
        }

        @Override
        public int getChildrenCount(int groupPosition) {
            return FOURTH_LEVEL_COUNT;
        }

        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }
    }





    ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
    // Fourth Level


    public class FourthLevelExpandableListView extends ExpandableListView {

        public FourthLevelExpandableListView(Context context) {
            super(context);
        }

        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            //999999 is a size in pixels. ExpandableListView requires a maximum height in order to do measurement calculations.
            heightMeasureSpec = MeasureSpec.makeMeasureSpec(999999, MeasureSpec.AT_MOST);
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }




    public class FourthLevelAdapter extends BaseExpandableListAdapter {

        private Context context;

        public FourthLevelAdapter(Context context) {
            this.context = context;
        }

        @Override
        public Object getGroup(int groupPosition) {
            return groupPosition;
        }

        @Override
        public int getGroupCount() {
            return 1;
        }

        @Override
        public long getGroupId(int groupPosition) {
            return groupPosition;
        }

        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_fourth, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                text.setText("FOURTH LEVEL");
            }
            return convertView;
        }

        @Override
        public Object getChild(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }

        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.row_fourth, null);
                TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
                text.setText("FOURTH LEVEL");
            }
            return convertView;
        }

        @Override
        public int getChildrenCount(int groupPosition) {
            return FOURTH_LEVEL_COUNT;
        }

        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        public boolean isChildSelectable(int groupPosition, int childPosition) {
            return true;
        }
    }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingBottom="@dimen/activity_vertical_margin"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_vertical_margin"
                tools:context=".MainActivity">

    <ExpandableListView android:id="@+id/mainList"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></ExpandableListView>
</RelativeLayout>

row_first.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="100dp"
              android:background="@android:color/holo_orange_dark"
              android:padding="10dp"
              android:orientation="vertical">

    <TextView
        android:id="@+id/eventsListEventRowText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="20dp"
        android:textColor="@android:color/white"
        android:textSize="18sp"/>
</LinearLayout>

row_second.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:background="@android:color/holo_blue_bright"
              android:padding="10dp"
              android:orientation="vertical">

    <TextView
        android:id="@+id/eventsListEventRowText"
        android:paddingLeft="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@android:color/white"
        android:textSize="14sp"/>
</LinearLayout>

row_third.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:padding="10dp"
              android:orientation="vertical"
              android:background="@android:color/holo_green_dark">

    <TextView
        android:id="@+id/eventsListEventRowText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@android:color/white"
        android:textSize="24sp"/>
</LinearLayout>

row_fourth.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    android:orientation="vertical"
    android:background="#d6cf1e">

    <TextView
        android:id="@+id/eventsListEventRowText"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textColor="@android:color/white"
        android:textSize="24sp"/>
</LinearLayout>

有人能告诉我这里的问题和解决方案吗。

尝试以下方法，即使根据您的要求，您也可以管理多个级别

看看这个对n级树非常有用的列表。你试过了吗？我不能让这个也工作。你必须定制它，我是说外观和填充。它工作得很好，需要花很多时间来理解和定制。看看这个对n级树有用的列表。你试过这个吗？我不能让这个也工作。你必须定制它，我是说外观和填充。它工作得很好，需要花很多时间来理解和定制。如果你发布URL，请尝试发布一些代码示例来解释URL是关于什么的。否则它将被视为垃圾邮件，并使您的答案不那么可信。欢迎使用堆栈溢出！一个链接到一个潜在的解决方案总是受欢迎的，但请你这样做，你的同事用户将有一些想法，它是什么，为什么会在那里。始终引用重要链接中最相关的部分，以防无法访问目标站点或永久脱机。考虑到仅仅是一个指向外部站点的链接是一个可能的原因。如果你发布了URL，试着发布一个小代码示例来解释URL是关于什么的。否则它将被视为垃圾邮件，并使您的答案不那么可信。欢迎使用堆栈溢出！一个链接到一个潜在的解决方案总是受欢迎的，但请你这样做，你的同事用户将有一些想法，它是什么，为什么会在那里。始终引用重要链接中最相关的部分，以防无法访问目标站点或永久脱机。考虑到仅仅是一个指向外部站点的链接是一个可能的原因。