Fragment基础

这是Fragment的基础

• 基本使用
• 静态
• 动态
• Fragment的生命周期

基本使用

静态

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <fragment
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:name="com.example.day03.BlankFragment"
        android:id="@+id/my_blank"
        />

</LinearLayout>

动态

package com.example.day03;

import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class Main2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);


        FragmentManager supportFragmentManager = getSupportFragmentManager();//没有new的方法

        FragmentTransaction fragmentTransaction = supportFragmentManager.beginTransaction();

        BlankFragment blankFragment = new BlankFragment();
        BlankFragment2 blankFragment2 = new BlankFragment2();

        fragmentTransaction.add(R.id.ll,blankFragment);//添加
        fragmentTransaction.replace(R.id.ll,blankFragment2);//替换

        fragmentTransaction.commit();//展示
    }
}

Fragment的生命周期

来源：CSDN

作者：天青雨色浮烟雨

链接：https://blog.csdn.net/apple17625040076/article/details/103810907