简单的Fragment使用(包括横竖屏)

为Activity中配置Fragment,具体布局在Fragment的xml中写,Activity的布局只有一个Fragment.

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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<fragment
android:id="@+id/mainfragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.example.fragmentdemo.MainFragment"
/>

</RelativeLayout>

MainActivity中的代码:

package com.example.fragmentdemo;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

MainFragment.java:

package com.example.fragmentdemo;

import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainFragment extends Fragment {
MyApp myapp;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
myapp = MyApp.getMyApp();
String[] games = myapp.getGameNames();
View view = inflater.inflate(R.layout.fragment_main, null);
ListView lv = (ListView) view.findViewById(R.id.lv);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, games);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
if (getActivity().findViewById(R.id.fl_container) == null) {
if (position == 0) {
Intent intent = new Intent(getActivity(),
DotaActivity.class);
startActivity(intent);
} else {
Intent intent = new Intent(getActivity(),
LolActivity.class);
startActivity(intent);
}
} else {
//                  FrameLayout container = (FrameLayout) getActivity()
//                          .findViewById(R.id.fl_container);
if (position == 0) {
getFragmentManager().beginTransaction()
.replace(R.id.fl_container, new DotaFragment())
.commit();
}else {
getFragmentManager().beginTransaction()
.replace(R.id.fl_container, new LolFragment())
.commit();
}
}

}
});
return view;
}
}

这里还简单的写了另外两个Activity,以及对应的Fragment:

Activity的布局文件都只有一个Fragment:

<fragment
android:id="@+id/lolfragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.example.fragmentdemo.LolFragment"
/>

Fragment的布局:

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="LOL"
android:textSize="50sp"
/>

Activity和Fragment的代码:

package com.example.fragmentdemo;

import android.app.Activity;
import android.os.Bundle;

public class DotaActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dota);
}
}

package com.example.fragmentdemo;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class DotaFragment extends Fragment{

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_dota, null);
return view;
}

}

package com.example.fragmentdemo;

import android.app.Activity;
import android.os.Bundle;

public class LolActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lol);
}
}

package com.example.fragmentdemo;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class LolFragment extends Fragment{

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_lol, null);
return view;
}
}

MyAPP.java:

package com.example.fragmentdemo;

import android.app.Application;

public class MyApp extends Application{
private String[] games = new String[]{"DOTA","LOL"};
private static MyApp myapp;

@Override
public void onCreate() {
super.onCreate();
myapp = this;
}

public static MyApp getMyApp(){
return myapp;
}

public String[] getGameNames(){
return games;
}
}

横屏的布局:

layout-land/activity_main.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="horizontal" >

<fragment
android:id="@+id/fragmentlist"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="30"
android:name="com.example.fragmentdemo.MainFragment"
/>

<FrameLayout
android:id="@+id/fl_container"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="70"
>

</FrameLayout>

</LinearLayout>