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Android UI编程(8)——动态加载Fragment
通过动态加载fragment实现在一个Activity拥有3种不同的布局，直接看效果图吧：
常规模式下：
点击家居控制：
代码：
AndroidManifest.xml——没有做任何修改，创建工程默认
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wxl.fragment"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.wxl.fragment.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
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:background="#ffcccc"
android:orientation="vertical" >
<TextView
android:id="@+id/fragment1_textView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="第一个Fragment界面"
android:textSize="50sp"/>
</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:background="#00ffff"
android:orientation="vertical" >
<TextView
android:id="@+id/fragment2_textView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="第二个Fragment界面"
android:textSize="50sp"/>
</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:background="#ffff00"
android:orientation="vertical" >
<TextView
android:id="@+id/fragment2_textView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="第三个Fragment界面"
android:textSize="50sp"/>
</LinearLayout>
activity_main.xml<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"
android:orientation="vertical"
android:background="#000000"
android:id="@+id/main">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="80dp"
android:background="@drawable/main_menu_bk"
android:orientation="vertical" >
<!-- android:splitMotionEvents="false"多个view是否分流touch 事件 -->
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_centerHorizontal="true"
android:splitMotionEvents="false">
<LinearLayout
android:id="@+id/menu_1"
android:layout_width="250dp"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:text="常规模式"
android:textColor="#ffffffff"
android:textSize="28sp" />
</LinearLayout>
<View
android:layout_width="4dp"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="?android:attr/listDivider"/>
<LinearLayout
android:id="@+id/menu_2"
android:layout_width="250dp"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:text="家居控制"
android:textColor="#ffffffff"
android:textSize="28sp" />
</LinearLayout>
<View
android:layout_width="3dp"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="?android:attr/listDivider"/>
<LinearLayout
android:id="@+id/menu_3"
android:layout_width="250dp"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:gravity="center"
android:text="幸福社区"
android:textColor="#ffffffff"
android:textSize="28sp" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
<LinearLayout
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
Fragment1.javapackage com.wxl.fragment;
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
@SuppressLint("NewApi")
public class Fragment1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment1, container,false);
}
}
Fragment2.javapackage com.wxl.fragment;
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
@SuppressLint("NewApi")
public class Fragment2 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment2, container,false);
}
}
Fragment3.javapackage com.wxl.fragment;
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
@SuppressLint("NewApi")
public class Fragment3 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment3, container,false);
}
}
MainActivity.javapackage com.wxl.fragment;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.LinearLayout;
public class MainActivity extends Activity implements OnClickListener{
public static final int NORMAL_MODE = 0;
public static final int SMARTHOME_MODE = 1;
public static final int COMMUNITY_MODE = 2;
FragmentManager fragmentManager;
private int mMode = NORMAL_MODE;
private Fragment mFragment;//记录当前处于哪个fragment
private Fragment1 fragment1;
private Fragment2 fragment2;
private Fragment3 fragment3;
@SuppressLint("NewApi") @Override
protected void onCreate(Bundle savedInstanceState) {
LinearLayout menu1, menu2, menu3;
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
menu1 = (LinearLayout)this.findViewById(R.id.menu_1);
menu1.setOnClickListener(this);
menu2 = (LinearLayout)this.findViewById(R.id.menu_2);
menu2.setOnClickListener(this);
menu3 = (LinearLayout)this.findViewById(R.id.menu_3);
menu3.setOnClickListener(this);
fragmentManager = getFragmentManager();
/*fragmentManager.beginTransaction()获取FragmentTransaction对象
* hide(mFragment)隐藏当前的fragment
* */
fragment1 = new Fragment1();
if (fragment1.isAdded()) {
fragmentManager.beginTransaction().show(fragment1).hide(mFragment).commit();
} else {
fragmentManager.beginTransaction().add(R.id.root, fragment1)
.show(fragment1).commit();
}
mFragment = fragment1;
}
@SuppressLint("NewApi") @Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
int mode = NORMAL_MODE;
switch (arg0.getId()) {
case R.id.menu_1:
{
mode = NORMAL_MODE;
}
break;
case R.id.menu_2:
{
mode = SMARTHOME_MODE;
}
break;
case R.id.menu_3:
{
mode = COMMUNITY_MODE;
}
break;
}
if (mMode == mode)
return;
mMode = mode;
FragmentTransaction fragmentTransaction;
fragmentTransaction = fragmentManager.beginTransaction();
if (mode == NORMAL_MODE) {
if (fragment1 == null) {
fragment1 = new Fragment1();
}
if (fragment1.isAdded()) {
fragmentTransaction.show(fragment1).hide(mFragment).commit();
} else {
fragmentTransaction.add(R.id.root, fragment1)
.show(fragment1).hide(mFragment).commit();
}
mFragment = fragment1;
} else if (mode == SMARTHOME_MODE) {
if (fragment2 == null) {
fragment2 = new Fragment2();
}
if (fragment2.isAdded()) {
fragmentTransaction.show(fragment2).hide(mFragment).commit();
} else {
fragmentTransaction.add(R.id.root, fragment2)
.show(fragment2).hide(mFragment).commit();
}
mFragment = fragment2;
} else if (mode == COMMUNITY_MODE) {
if (fragment3 == null) {
fragment3 = new Fragment3();
}
if (fragment3.isAdded()) {
fragmentTransaction.show(fragment3).hide(mFragment).commit();
} else {
fragmentTransaction.add(R.id.root, fragment3)
.show(fragment3).hide(mFragment).commit();
}
mFragment = fragment3;
}
}
}
注意：同一个FragmentTransaction对象只能有一次commit()，否则提示“java.lang.IllegalStateException:commit already called”。
源码下载：
http://download.csdn.net/detail/thanksgining/8406745
Android UI编程(8)——动态加载Fragment
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