這篇“Android Fragment中如何創建靜態注冊和動態注冊”文章的知識點大部分人都不太理解,所以小編給大家總結了以下內容,內容詳細,步驟清晰,具有一定的借鑒價值,希望大家閱讀完這篇文章能有所收獲,下面我們一起來看看這篇“Android Fragment中如何創建靜態注冊和動態注冊”文章吧。
一、fragment靜態注冊創建方法及步驟
1.創建一個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其功能。實現代碼如下:
static_fragment.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/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容:"> </EditText> </LinearLayout>
StaticFragment.java
package 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。
實現代碼如下:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/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節點,name屬性必須填寫完整的路徑
MainActivity.java
package 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動態注冊創建方法及步驟
1.新建一個項目,創建2個Fragment繼承類分別為MyFragment1.java和MyFragment2.java,然后創建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="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/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.java
package com.example.myapplication;
import android.content.Context;
import android.net.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="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/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.java
package 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);
}
}上述代碼與靜態創建的區別不大。
2.以代碼的形式將fragment添加到activity需要在activity里直接調用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); ts.commit();
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="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/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.java
package 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
FragmentTransaction ts = fm.beginTransaction();
hideFragments(ts);
switch (v.getId()){
case R.id.btn_dy1:
mBtnDy1.setBackgroundColor(0xff0000ff);
if(mfg1 == null){
mfg1 = new MyFragment1();
ts.add(R.id.fragment_container,mfg1);
}else {
ts.show(mfg1);
}
break;
case R.id.btn_dy2:
mBtnDy2.setBackgroundColor(0xff0000ff);
if(mfg2 == null){
mfg2 = new MyFragment2();
ts.add(R.id.fragment_container,mfg2);
}else {
ts.show(mfg2);
}
break;
default:
break;
}
ts.commit();
}
// 將所有的Fragment都置為隱藏狀態。
private void hideFragments(FragmentTransaction transaction) {
if (mfg1 != null) {
transaction.hide(mfg1);
}
if (mfg2 != null) {
transaction.hide(mfg2);
}
}
// 清除掉所有的選中狀態。
private void clearSelection() {
mBtnDy1.setBackgroundColor(0xffffffff);
mBtnDy2.setBackgroundColor(0xffffffff);
}
}演示:

以上就是關于“Android Fragment中如何創建靜態注冊和動態注冊”這篇文章的內容,相信大家都有了一定的了解,希望小編分享的內容對大家有幫助,若想了解更多相關的知識內容,請關注億速云行業資訊頻道。
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。