【移動應用開發(fā)技術(shù)】Android Fragment中怎么創(chuàng)建靜態(tài)注冊和動態(tài)注冊

【移動應用開發(fā)技術(shù)】AndroidFragment中怎么創(chuàng)建靜態(tài)注冊和動態(tài)注冊

這篇文章主要介紹了AndroidFragment中怎么創(chuàng)建靜態(tài)注冊和動態(tài)注冊，具有一定借鑒價值，感興趣的朋友可以參考下，希望大家閱讀完這篇文章之后大有收獲，下面讓在下帶著大家一起了解一下。一、fragment靜態(tài)注冊創(chuàng)建方法及步驟1.創(chuàng)建一個StaticFragment.java文件繼承Fragment類和一個static_fragment.xml文件完成fragment的布局。在StaticFragment.java中重載onCreateView(……)方法，通過調(diào)用inflater.inflate(……)方法并傳入布局資源ID生成fragment的視圖資源，并綁定static_fragment.xml中的相關組件然后實現(xiàn)其功能。實現(xiàn)代碼如下：static_fragment.xml<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".StaticFragment"

android:orientation="vertical">

<Button

android:id="@+id/btn_fm"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="這是fragment靜態(tài)注冊"

android:textAllCaps="false">

</Button>

<EditText

android:id="@+id/et_fm"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:hint="請輸入你要改變的內(nèi)容：">

</EditText>

</LinearLayout>StaticFragment.javapackage

com.example.myapplication;

import

android.os.Bundle;

import

android.view.LayoutInflater;

import

android.view.View;

import

android.view.ViewGroup;

import

android.widget.Button;

import

android.widget.EditText;

import

androidx.annotation.NonNull;

import

androidx.annotation.Nullable;

import

androidx.fragment.app.Fragment;

public

class

StaticFragment

extends

Fragment

{

private

Button

mBtnFm;

private

EditText

mEtFm;

@Nullable

@Override

public

View

onCreateView(@NonNull

LayoutInflater

inflater,

@Nullable

ViewGroup

container,

@Nullable

Bundle

savedInstanceState)

{

//fragment的視圖資源是直接通過調(diào)用inflater.inflate(……)方法并傳入布局資源ID生成的。

View

v

=

inflater.inflate(R.layout.static_fragment,

container,false);

mEtFm

=

v.findViewById(R.id.et_fm);

mBtnFm

=

v.findViewById(R.id.btn_fm);

mBtnFm.setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

v)

{

mBtnFm.setText(mEtFm.getText().toString());

}

});

return

v;

}

}2.在主布局activity_main.xml文件中綁定fragment布局文件。實現(xiàn)代碼如下：activity_main.xml<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity"

android:orientation="vertical">

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="這是主布局"

android:textColor="@color/colorAccent"

android:textSize="30sp">

</TextView>

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="下面是fragment的布局"

android:textColor="@color/colorPrimaryDark"

android:textSize="30sp">

</TextView>

<fragment

android:id="@+id/static_fm"

android:name="com.example.myapplication.StaticFragment"

android:layout_width="match_parent"

android:layout_height="wrap_content">

</fragment>

</LinearLayout>注意：布局文件中加fragment節(jié)點，name屬性必須填寫完整的路徑MainActivity.javapackage

com.example.myapplication;

import

androidx.appcompat.app.AppCompatActivity;

import

android.os.Bundle;

public

class

MainActivity

extends

AppCompatActivity

{

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

}演示：二、fragment動態(tài)注冊創(chuàng)建方法及步驟1.新建一個項目，創(chuàng)建2個Fragment繼承類分別為MyFragment1.java和MyFragment2.java，然后創(chuàng)建2個布局文件分別為fragment1.xml和fragment2.xml.詳細代碼如下：fragment1.xml<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MyFragment1"

android:gravity="center"

android:background="@color/colorPrimaryDark">

<TextView

android:layout_width="wrap_content"

android:layout_height="match_parent"

android:gravity="center"

android:text="@string/hello_blank_fragment"

android:textSize="30sp"

android:textAllCaps="false"

android:textColor="#F70505">

</TextView>

</LinearLayout>MyFragment1.javapackage

com.example.myapplication;

import

android.content.Context;

import

.Uri;

import

android.os.Bundle;

import

androidx.fragment.app.Fragment;

import

android.view.LayoutInflater;

import

android.view.View;

import

android.view.ViewGroup;

public

class

MyFragment1

extends

Fragment

{

@Override

public

View

onCreateView(LayoutInflater

inflater,

ViewGroup

container,

Bundle

savedInstanceState)

{

//

Inflate

the

layout

for

this

fragment

return

inflater.inflate(R.layout.fragment1,

container,

false);

}

}fragment2.xml<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MyFragment2"

android:gravity="center"

android:background="@color/colorAccent">

<TextView

android:layout_width="wrap_content"

android:layout_height="match_parent"

android:gravity="center"

android:text="@string/hello_blank_fragment"

android:textSize="30sp"

android:textAllCaps="false"

android:textColor="#03FAE3">

</TextView>

</LinearLayout>MyFragment2.javapackage

com.example.myapplication;

import

android.os.Bundle;

import

androidx.fragment.app.Fragment;

import

android.view.LayoutInflater;

import

android.view.View;

import

android.view.ViewGroup;

public

class

MyFragment2

extends

Fragment

{

@Override

public

View

onCreateView(LayoutInflater

inflater,

ViewGroup

container,

Bundle

savedInstanceState)

{

//

Inflate

the

layout

for

this

fragment

return

inflater.inflate(R.layout.fragment2,

container,

false);

}

}上述代碼與靜態(tài)創(chuàng)建的區(qū)別不大。2.以代碼的形式將fragment添加到activity需要在activity里直接調(diào)用FragmentManager。FragmentManager

fm

=

getSupportFragmentManager();然后通過代碼塊：FragmentTransaction

ts

=

fm.beginTransaction();

Fragment

mfg1

=

new

MyFragment1();

ts.add(R.id.fragment_container,mfg1);

mit();提交一個fragment事務。其核心是ts.add(……)方法。詳細代碼如下：activity_main.xml：<?xml

version="1.0"

encoding="utf-8"?>

<RelativeLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<LinearLayout

android:id="@+id/linear"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:layout_alignParentBottom="true">

<Button

android:id="@+id/btn_dy1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="fragment1"

android:textColor="@color/colorAccent"

android:textSize="30sp">

</Button>

<Button

android:id="@+id/btn_dy2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="fragment2"

android:textColor="@color/colorPrimaryDark"

android:textSize="30sp">

</Button>

</LinearLayout>

<FrameLayout

android:id="@+id/fragment_container"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_above="@id/linear">

</FrameLayout>

</RelativeLayout>注意：fragment模塊一般用FrameLayout布局承載MainActivity.javapackage

com.example.myapplication;

import

androidx.appcompat.app.AppCompatActivity;

import

androidx.fragment.app.Fragment;

import

androidx.fragment.app.FragmentManager;

import

androidx.fragment.app.FragmentTransaction;

import

android.os.Bundle;

import

android.view.View;

import

android.widget.Button;

public

class

MainActivity

extends

AppCompatActivity

implements

View.OnClickListener

{

private

Button

mBtnDy1;

private

Button

mBtnDy2;

FragmentManager

fm;

Fragment

mfg1;

Fragment

mfg2;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

fm

=

getSupportFragmentManager();

mBtnDy1

=

findViewById(R.id.btn_dy1);

mBtnDy2

=

findViewById(R.id.btn_dy2);

mBtnDy1.setOnClickListener(this);

mBtnDy2.setOnClickListener(this);

}

@Override

public

void

onClick(View

v)

{

clearSelection();//清除按鈕狀態(tài)

FragmentTransaction

ts

=

fm.beginTransaction();

hideFragments(ts);

switch

(