在android开发中,fragment的add和replace的区别 //replace==remove|append


在Android开发中,`Fragment`的`add`和`replace`方法用于向`Activity`中添加或替换`Fragment`。 `add`方法用于向`Activity`的底部添加一个新的`Fragment`,并且原有的`Fragment`不会被移除。如果你想在`Activity`中显示多个`Fragment`,可以使用`add`方法。 `replace`方法用于替换`Activity`中当前显示的`Fragment`。如果你只想在`Activity`中显示一个`Fragment`,可以使用`replace`方法。 `replace`方法也可以用于在`Activity`中添加新的`Fragment`,但是会先将当前显示的`Fragment`移除,然后再添加新的`Fragment`。`replace`方法等同于`remove|append`操作。 在代码中,你可以这样使用这两个方法: ```java getSupportFragmentManager().beginTransaction() .add(R.id.fragment_container, new MyFragment()) .commit(); getSupportFragmentManager().beginTransaction() .replace(R.id.fragment_container, new MyFragment()) .commit(); ``` 在这两个例子中,`R.id.fragment_container`是你在`Activity`的布局文件中定义的用于显示`Fragment`的容器。`new MyFragment()`是你要添加或替换的`Fragment`的实例。 [2023-11-07 22:36:05 | AI写代码神器 | 272点数解答]
- package com.example.weather; import android.content.context; import android.media.mediaplayer; import android.net.uri; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.webkit.websettings; import android.webkit.webview; import android.webkit.webviewclient; import android.widget.videoview; import androidx.fragment.app.fragment; public class realtimemonitoringfragment extends fragment {(30点数解答 | 2024-10-12 10:31:18)199
- package com.example.weather; import android.content.context; import android.media.mediaplayer; import android.net.uri; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.webkit.websettings; import android.webkit.webview; import android.webkit.webviewclient; import android.widget.videoview; import androidx.fragment.app.fragment; public class realtimemonitoringfragment extends fragment {(531点数解答 | 2024-10-12 10:32:25)183
- 如何用aide编写的xposed软件拦截一个smail类里面的方法名,请参考如下代码进行修改达到效果 import android.content.*; import android.graphics.*; import android.os.*; import android.widget.*; import de.robv.android.xposed.*; import de.robv.android.xposed.callbacks.*; import java.util.*; import android.app.*; /* 注意:该类不要自己写构造方法,否者可能会hook不成功 * 开发xposed模块完成以后,关闭bebug以提升性能 * debug模式只需要第一次重启,以后修改hook代码就不用重启了 */ public class xposed implements ixposedhookloadpackage { public static activity 上下文; @override public void handleloadpackage(x(649点数解答 | 2024-10-12 00:15:48)195
- # 预处理 def load_and_preprocess(file_path): df = pd.read_excel(file_path, engine='openpyxl') df = df.rename(columns={ '评价内容': 'comment', '星级': 'rating' }) # 删除未评论评价以及评论为空的记录 df = df.remove('此用户没有填写评价。') df = df.remove('此用户未及时填写评价内容') df = df.remove('此用户未填写评价内容') df = df.remove('该用户未评价,系统默认好评') df = df.dropna(subset=['comment']) # 去除非文字字符(保留中文、英文、数字) df['comment'] = df['comment'].apply(lambda x: re.sub(r'[^\w\u4e00-\u9fff]', '', (635点数解答 | 2025-06-25 15:46:50)56
- traceback (most recent call last): file "/users/yinman/desktop/python和计网/习题.py", line 312, in <module> monty_hall_simulation(10000) file "/users/yinman/desktop/python和计网/习题.py", line 298, in monty_hall_simulation switch_door = [0,1,2].remove(player_choice).remove(open_door)[0] attributeerror: 'nonetype' object has no attribute 'remove' 有什么错误提示(517点数解答 | 2024-11-27 19:10:59)149
- 在android开发中,fragment的add和replace的区别 //replace==remove|append(272点数解答 | 2023-11-07 22:36:05)196
- import requests from bs4 import beautifulsoup import pandas as pd url = "https://so.gushiwen.cn/gushi/tangshi.aspx" response = requests.get(url) soup = beautifulsoup(response.text, 'html.parser') # 提取所需数据 poems_data = [] for row in soup.find_all('tr', class_='tlist')[1:]: cols = row.find_all('td') type_ = cols.text.strip() title = cols.a.text.strip() content = cols.text.replace('\n', '').replace('\t', '') author = cols.text.strip() poems_data.append([type_, title, conte(120点数解答 | 2024-06-24 02:04:56)241
- 如下语句对应的ir表示是下列哪项 int a = 8; a = a + 9; a %1 = alloca i32, align 4 %2 = store i32 8, i32* %1, align 4 %1 = add nsw i32 %2, 9 b %1 = alloca i32, align 4 store i32 8, i32* %1, align 4 %2 = load i32, i32* %1, align 4 %3 = add nsw i32 %2, 9 store i32 %3, i32* %1, align 4 c %1 = alloca i32, align 4 store i32 8, i32* %1, align 4 %2 = add nsw i32 %1, 9 store i32 %2, i32* %1, align 4 d %1 = alloca i32, align 4 store i32 8, i32* %1, align 4 %2 = load i32, i3(668点数解答 | 2024-12-18 18:39:12)115
- .method public setupplayer(lcn/subat/music/model/spplayconfig;ljava/lang/string;i)v .registers 6 .line 299 iget-object v0, p0, lcn/subat/music/fragment/player/spmovieplayerfragment;->covermask:lcn/subat/music/base/spconstraintlayout; const/16 v1, 0x8 invoke-virtual {v0, v1}, lcn/subat/music/base/spconstraintlayout;->setvisibility(i)v .line 300 iget-object v0, p0, lcn/subat/music/fragment/player/spmovieplayerfragment;->sharetip:lcn/subat/music/base/sptextview;(29点数解答 | 2024-11-05 01:36:35)184
- // 创建 http post 请求 httppost post = new httppost(videoip+"inference"); // 创建 multipartentitybuilder multipartentitybuilder builder = multipartentitybuilder.create(); // 上传文件路径 string filepath = ruoyiconfig.getuploadpath(); //处理视频和音频路径 string audiofileaddress = syntheticaudio.get("audiofile").tostring().replace("/profile/upload", ""); string videofileaddress = syntheticaudio.get("videofile").tostring().replace("/profile/upload", ""); // 添加音频文件 file audiofile = new file(filepath+audiofileaddress)(300点数解答 | 2024-12-06 16:07:20)227
- 作为c++开发,new int[10]跟new int[10]()区别(196点数解答 | 2023-11-09 00:45:31)217
- .method public 按钮1$被弹起(ii)v .locals 4 .param p1, "\u6a2a\u5750\u6807" # i .param p2, "\u7eb5\u5750\u6807" # i .prologue .line 20 new-instance v0, ljava/lang/stringbuilder; invoke-direct {v0}, ljava/lang/stringbuilder;-><init>()v iget-object v1, p0, lcom/chuchenqi/窗口29;->手机1:lcom/e4a/runtime/components/impl/android/n9/手机; invoke-interface {v1}, lcom/e4a/runtime/components/impl/android/n9/手机;->取imei码()ljava/lang/string; move-result-object v1(208点数解答 | 2024-09-12 16:36:31)236