首先定義四個佈局文件分別表示切換的四個界面
fragment1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="我是第一個fragment" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="得到第四個Fragment中EditText的值" />
</LinearLayout>
fragment2.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="我是第二個fragment" />
<DatePicker
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
fragment3.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="我是第三個fragment" />
<RatingBar
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
fragment4.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="我是第四個fragment" />
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
定義一個主佈局文件來裝納四個切換的界面
activity_main.xml
<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/linearlayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#000000"
android:orientation="horizontal" >
<Button
android:id="@+id/btn1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="A" />
<Button
android:id="@+id/btn2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="B" />
<Button
android:id="@+id/btn3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="C" />
<Button
android:id="@+id/btn4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="D" />
</LinearLayout>
<FrameLayout
android:id="@+id/framelayout"
android:layout_below="@id/linearlayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
</RelativeLayout>
創建四個類Fragment1,Fragment2,Fragment3,Fragment4,
分別表示四個界面的操作類。
Fragment2 ,Fragment3和Fragment4只是簡單的返回其對應的佈局文件視圖,這裏不做介紹。
Fragment2.java
package com.example.myfragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment2 extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment2, null);
return view;
}
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}
Fragment3.java
package com.example.myfragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment3 extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment3, null);
return view;
}
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}
Fragment4.java
package com.example.myfragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment4 extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment4, null);
return view;
}
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}
Fragment1主要是獲取Fragment4裏EditText的值並顯示出來。
通過getFragmentManager().findFragmentByTag("fragment4");取得fragment4對象,
並通過fragment4.getView().findViewById(R.id.editText1);獲得EditText控件,顯示裏面的值。
Fragment1.java
package com.example.myfragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Fragment1 extends Fragment {
private Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment1, null);
button = (Button) view.findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//得到fragment4對象
Fragment4 fragment4 = (Fragment4) getFragmentManager().findFragmentByTag("fragment4");
//取得fragment4中的editText控件,並得到裏面的值
EditText editText = (EditText) fragment4.getView().findViewById(R.id.editText1);
Toast.makeText(getActivity(), "第四個Fragment中EditText的值爲:\n"+editText.getText(),
Toast.LENGTH_LONG).show();
}
});
return view;
}
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}
主界面實現類
MainActivity.java
package com.example.myfragment;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends FragmentActivity implements OnClickListener {
private Button btn1;//標籤按鈕1
private Button btn2;//標籤按鈕2
private Button btn3;//標籤按鈕3
private Button btn4;//標籤按鈕4
private FragmentManager manager;
private FragmentTransaction transaction;
private Fragment1 fragment1;//頁面1
private Fragment2 fragment2;//頁面2
private Fragment3 fragment3;//頁面3
private Fragment4 fragment4;//頁面4
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//通過manager得到transaction對象
manager = getSupportFragmentManager();
transaction = manager.beginTransaction();
//創建四個Fragment對象並將其添加到transaction中
fragment1 = new Fragment1();
//第一個參數表示要添加到某個佈局上(id)
//第二個參數表示要添加的Fragment
//第三個設置標籤
transaction.add(R.id.framelayout, fragment1, "fragment1");
//默認顯示第一個頁面,其他的都隱藏起來
fragment2 = new Fragment2();
transaction.add(R.id.framelayout, fragment2, "fragment2").hide(fragment2);
fragment3 = new Fragment3();
transaction.add(R.id.framelayout, fragment3, "fragment3").hide(fragment3);
fragment4 = new Fragment4();
transaction.add(R.id.framelayout, fragment4, "fragment4").hide(fragment4);
//提交
transaction.commit();
btn1 = (Button) findViewById(R.id.btn1);
btn2 = (Button) findViewById(R.id.btn2);
btn3 = (Button) findViewById(R.id.btn3);
btn4 = (Button) findViewById(R.id.btn4);
btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
btn3.setOnClickListener(this);
btn4.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//將全部Fragment頁面都隱藏起來
transaction = manager.beginTransaction();
transaction.hide(fragment1).hide(fragment2).hide(fragment3).hide(fragment4);
//然後顯示你所點擊的那個按鈕所對應的Fragment
switch (v.getId()) {
case R.id.btn1:
transaction.show(fragment1);
break;
case R.id.btn2:
transaction.show(fragment2);
break;
case R.id.btn3:
transaction.show(fragment3);
break;
case R.id.btn4:
transaction.show(fragment4);
break;
}
//提交
transaction.commit();
}
}
MyFragmentTab截圖