android:framelayout中调整子视图的顺序

一，代码：

xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.Frame2Activity">

    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/tv1"
            android:layout_width="400dp"
            android:layout_height="400dp"
            android:gravity="bottom|end"
            android:text="视图1"
            android:background="#AC6BFB"
            android:textColor="@color/white"
            android:textSize="60sp"
            />
        <TextView
            android:id="@+id/tv2"
            android:layout_width="300dp"
            android:layout_height="300dp"
            android:gravity="bottom|end"
            android:text="视图2"
            android:background="#37D4B8"
            android:textColor="@color/white"
            android:textSize="60sp"
            />
        <TextView
            android:id="@+id/tv3"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:gravity="bottom|end"
            android:text="视图3"
            android:background="#FF8C00"
            android:textColor="@color/white"
            android:textSize="60sp"
            />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="end|bottom"
            android:text="修改顺序"
            android:onClick="onSeqButtonClick"
            />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="start|bottom"
            android:text="重置顺序"
            android:onClick="onResetButtonClick"
            />
    </FrameLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

java

package com.example.okdemo1.activity;

import android.os.Bundle;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.TextView;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

import com.example.okdemo1.R;

public class Frame2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_frame2);
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
            return insets;
        });
    }



    //改变顺序按钮被点击
    public void onSeqButtonClick(View v) {
        //得到view
        FrameLayout frameLayout = findViewById(R.id.frameLayout);
        TextView tv1 = findViewById(R.id.tv1);
        TextView tv2 = findViewById(R.id.tv2);
        TextView tv3 = findViewById(R.id.tv3);

        // 改变顺序
        frameLayout.bringChildToFront(tv1);
        frameLayout.bringChildToFront(tv3);
    }


    //重置顺序按钮被点击
    public void onResetButtonClick(View v) {
        //得到view
        FrameLayout frameLayout = findViewById(R.id.frameLayout);
        TextView tv1 = findViewById(R.id.tv1);
        TextView tv2 = findViewById(R.id.tv2);
        TextView tv3 = findViewById(R.id.tv3);

        // 重置顺序
        frameLayout.bringChildToFront(tv1);
        frameLayout.bringChildToFront(tv2);
        frameLayout.bringChildToFront(tv3);
    }

}

 

二，测试效果:

改变顺序前

改变顺序后