Fragment的静态加载

最新推荐文章于 2022-07-10 22:13:07 发布

原创最新推荐文章于 2022-07-10 22:13:07 发布 · 359 阅读

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这篇博客探讨了如何在Android中实现Fragment的静态加载。通过分析`fragment_list.xml`布局文件和`activity_static_load_fragment.xml`，博主展示了如何在Activity中定位并管理Fragment。同时，介绍了Fragment的Java代码管理类以及装载Fragment的Activity的相关Java实现。

xml布局文件

fragment_list.xml （控制fragment里面的内容）

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:background="#ffff00">
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="TextView"
        android:textColor="#000000"
        android:textSize="20sp"/>
</RelativeLayout>

activity_static_load_fragment.xml （控制fragment控件所处于Activity页面中的位置）

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="com.administrator.fragmentdemo.MainActivity">

    <fragment
        android:id="@+id/listFragment"
        android:name="com.administrator.fragmentdemo.ListFragment"
        android:layout_width="100dp"
        android:layout_height="100dp"/>
    <fragment
        android:id="@+id/listFragmentTow"
        android:name="com.administrator.fragmentdemo.ListFragment"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_centerInParent="true"/>

</RelativeLayout>

Fragment的Java代码管理类

package com.administrator.fragmentdemo;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 * 列表fragment
 */
public class ListFragment extends Fragment {
    //创建视图
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        //new view
        View view = inflater.inflate(R.layout.fragment_list,container,false);
        TextView textView = view.findViewById(R.id.textView);//需要根据根视图view进行findViewById
        textView.setText("hi");
        return view;
    }
    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }

    @Override
    public void onStart() {
        super.onStart();
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public void onStop() {
        super.onStop();
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }
}

装载Fragment的Activity的Java代码

package com.administrator.fragmentdemo;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 * 列表fragment
 */
public class ListFragment extends Fragment {
    //创建视图
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        //new view
        View view = inflater.inflate(R.layout.fragment_list,container,false);
        TextView textView = view.findViewById(R.id.textView);//需要根据根视图view进行findViewById
        textView.setText("hi");
        return view;
    }
    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }

    @Override
    public void onStart() {
        super.onStart();
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public void onStop() {
        super.onStop();
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }
}