有碎片添加的条件 [英] having a condition to fragment adding

问题描述

在过去的4个小时中，我一直试图了解如何操作。
是清楚的，我需要在特定条件下添加一个片段，出于我的目的，条件可以是：
a。如果父母的身份证与我的要求相符。
b。如果片段的ID符合我的要求。

我试图将条件放入片段本身：

 公共类BlockFrag扩展Fragment {
 SharedPreferences sp; 
 @Override 
 public View onCreateView（LayoutInflater inflater，ViewGroup container，Bundle savedInstanceState）
 {
 sp = getActivity（）。getSharedPreferences（ myOptions，Context.MODE_PRIVATE）; 
 int id = container.getId（）; //没有用（我认为容器由于某种原因为空
开关（id）
 {
默认值：返回充气机.inflate（R.layout.nothing，container，false）; 
 
 case（R.id.redFrame）：{
 if（sp.getBoolean（ redBlock，true））{ 
 return inflater.inflate（R.layout.block_frag，container，false）; 
} 
} 
 case（R.id.greenFrame）：{
 if（ sp.getBoolean（ greenBlock，true））{
 return inflater.inflate（R.layout.block_frag，container，false）; 
 
} 
  

我也尝试以编程方式获取条件，但是当我调用放置的布局时，我无法理解如何防止片段自动生成。

这是它放置的布局

 < FrameLayout 
 android：layout_width = match_parent 
 androi d：layout_height = match_parent 
 android：id = @ + id / redFrame 
 android：layout_weight = 0.33333> 
 
 
<片段
 android：name = com.example.dor.myapplication.BlockFrag 
 android：id = @ + id / blockRed 
 android：layout_width = match_parent 
 android：layout_height = match_parent 
工具：layout = @ layout / block_frag /> 
  

如果重要的话，这是片段的布局...

 < FrameLayout xmlns：android = http://schemas.android.com/apk/res/android 
 android：layout_width = match_parent 
 android：layout_height = match_parent 
 android：layout_alignParentLeft = true 
 android：layout_alignParentStart = true> 
 
< ImageView 
 android：layout_width = 118dp 
 android：layout_height = match_parent 
 android：id = @ + id / blockFrag 
 android：src = @ drawable / block 
 android：layout_weight = 0.33333 
 android：layout_above = @ + id / linearLayout 
 android：layout_alignParentLeft = true 
 android：layout_alignParentStart = true 
 android：layout_gravity = left 
 android：scaleType = fitXY /> 
  

感谢您的帮助

解决方案

谢谢你的回答，但我不知道你是否愿意

无论如何，我通过以编程方式在活动的on = onCreate中添加片段来解决了我的问题并将插入的内容插入到 if中。

  BlockFrag rb = new BlockFrag（）; 
 FragmentManagerfragmentManager = getFragmentManager（）; //声明Fragment Manager 
 FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction（）; //声明Fragment Transaction 
 
 if（condition）
 {
 editor.putBoolean（ redBlock，true）; 
 fragmentTransaction.add（R.id.redFrame，rb）; //添加片段
} 
  

不用说我没有在活动布局中声明片段，也没有在片段类或片段xml布局中进行任何更改。

for the last 4 hours ive been trying to understand how to do it. to be clear, i need to add a fragment under a certain condition and for my purpose the condition can be either: a. if the parent's id matches to what i seek. b. if the fragment's id matches to what i seek.

i tried to put the condition inside the fragment itself:

public class BlockFrag extends Fragment{
SharedPreferences sp;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    sp =  getActivity().getSharedPreferences("myOptions", Context.MODE_PRIVATE);
    int id = container.getId();//didn't work(i think the container is null for some reason
    switch (id)
    {
        default: return inflater.inflate(R.layout.nothing, container, false);

        case (R.id.redFrame): {
            if (sp.getBoolean("redBlock", true)) {
                return inflater.inflate(R.layout.block_frag, container, false);
            }
        }
        case (R.id.greenFrame): {
            if (sp.getBoolean("greenBlock", true)) {
                return inflater.inflate(R.layout.block_frag, container, false);

        }

i also tried to get the condition programatically but i cant understand how to prevent the fragment to automatically generate when i call the layout it's placed.

this is the layout it's placed for example

<FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/redFrame"
        android:layout_weight="0.33333">


        <fragment
            android:name="com.example.dor.myapplication.BlockFrag"
            android:id="@+id/blockRed"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:layout="@layout/block_frag"/>

this is the fragment's layout if it matters...

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">

<ImageView
    android:layout_width="118dp"
    android:layout_height="match_parent"
    android:id="@+id/blockFrag"
    android:src="@drawable/block"
    android:layout_weight="0.33333"
    android:layout_above="@+id/linearLayout"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_gravity="left"
    android:scaleType="fitXY"/>

thank you for helping, any kind of way to do this will help me.

解决方案

Leigh thank you for your answer but i don't know if you didn't understand my question or i didn't understand your answer...

anyway, i solved my problem through programatically adding the fragment in r=the onCreate of the activity and inserting the adding to an "if"

    BlockFrag rb = new BlockFrag();
    FragmentManager fragmentManager = getFragmentManager ();//declaring Fragment Manager
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction ();// declaring Fragment Transaction

    if(condition)
    {
        editor.putBoolean("redBlock", true);
        fragmentTransaction.add(R.id.redFrame, rb);//adding the fragment
    }

needless to say i didn't declare the fragment in my activity layout and didn't perform any changes in the fragment class or fragment xml layout.

这篇关于有碎片添加的条件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！