Fragment进阶（二）----->动态、TAB页面切换
MainActivity.java
package com.example.fragmenttest;
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.View;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/**
* 初始化操作
*/
MyFragment fragment = new MyFragment();
// 得到FragmentManager--开始事物
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
// 添加操作
transaction.add(R.id.ll_main, fragment);
// 提交事物
transaction.commit();
}
MyFragment2 fragment2;
public void showFragment2(View v) {
fragment2 = new MyFragment2();
FragmentManager fm = getSupportFragmentManager();
// 方法链调用
FragmentTransaction transaction = fm.beginTransaction().replace(
R.id.ll_main, fragment2);
// 将此次事物添加到回退栈中, 点击back, 可以返回到事务提交前的状态
transaction.addToBackStack(null);
transaction.commit();
}
public void deleteFragment2(View v) {
if (fragment2 != null) {
FragmentManager fm = getSupportFragmentManager();
// 方法链调用
FragmentTransaction transaction = fm.beginTransaction().remove(
fragment2);
transaction.addToBackStack(null);
transaction.commit();
fragment2 = null;
}
}
}
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="显示fragment2"
android:onClick="showFragment2"/>
<Button
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="移除fragment2"
android:onClick="deleteFragment2"/>
</LinearLayout>
<LinearLayout
android:id="@+id/ll_main"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>
MyFragment.java
package com.example.fragmenttest;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MyFragment extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return View.inflate(getActivity(), R.layout.fragment_article, null);
}
}
fragment_article.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="界面" />
</LinearLayout>
MyFragment2.java
package com.example.fragmenttest;
import android.os.Bundle;
import android.support.v4.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) {
return View.inflate(getActivity(), R.layout.fragment_article2, null);
}
}
fragment_article2.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="界面2" />
</LinearLayout>
***************************************************页面切换****************************************************
fragment_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/id_content"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</FrameLayout>
<include layout="@layout/bottom_bar"/>
</LinearLayout>
bottom_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ly_main_tab_bottom"
android:layout_width="fill_parent"
android:layout_height="55dp"
android:layout_alignParentBottom="true"
android:background="@drawable/bottom_bar" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="55dp" >
<LinearLayout
android:id="@+id/id_tab_bottom_weixin"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:descendantFocusability="beforeDescendants"
android:gravity="center"
android:orientation="vertical" >
<ImageButton
android:id="@+id/btn_tab_bottom_weixin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#0000"
android:clickable="false"
android:src="@drawable/tab_weixin_pressed" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="微信" />
</LinearLayout>
<LinearLayout
android:id="@+id/id_tab_bottom_friend"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:descendantFocusability="beforeDescendants"
android:gravity="center"
android:orientation="vertical" >
<ImageButton
android:id="@+id/btn_tab_bottom_friend"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#0000"
android:clickable="false"
android:src="@drawable/tab_find_frd_normal" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="朋友" />
</LinearLayout>
<LinearLayout
android:id="@+id/id_tab_bottom_contact"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:descendantFocusability="beforeDescendants"
android:gravity="center"
android:orientation="vertical" >
<ImageButton
android:id="@+id/btn_tab_bottom_contact"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#0000"
android:clickable="false"
android:src="@drawable/tab_address_normal" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="通讯录" />
</LinearLayout>
<LinearLayout
android:id="@+id/id_tab_bottom_setting"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:descendantFocusability="beforeDescendants"
android:gravity="center"
android:orientation="vertical" >
<ImageButton
android:id="@+id/btn_tab_bottom_setting"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#0000"
android:clickable="false"
android:src="@drawable/tab_settings_normal" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="设置" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
main_tab_01.xml main_tab_02.xml main_tab_03.xml main_tab_04.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ly_main_weixin"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#fcfcfc"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:text="this is first tab !"
android:textColor="#000000"
android:textSize="30sp" />
</LinearLayout>
FragmentMainActivity
package com.example.mainframework02.fragment;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import com.example.mainframework02.R;
public class FragmentMainActivity extends Activity implements OnClickListener {
private MainTab02 mTab02;
private MainTab01 mTab01;
private MainTab03 mTab03;
private MainTab04 mTab04;
/**
* 底部四个按钮
*/
private LinearLayout mTabBtnWeixin;
private LinearLayout mTabBtnFrd;
private LinearLayout mTabBtnAddress;
private LinearLayout mTabBtnSettings;
/**
* 用于对Fragment进行管理
*/
private FragmentManager fragmentManager;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
initViews();
fragmentManager = getFragmentManager();
setTabSelection(0);
}
private void initViews() {
mTabBtnWeixin = (LinearLayout) findViewById(R.id.id_tab_bottom_weixin);
mTabBtnFrd = (LinearLayout) findViewById(R.id.id_tab_bottom_friend);
mTabBtnAddress = (LinearLayout) findViewById(R.id.id_tab_bottom_contact);
mTabBtnSettings = (LinearLayout) findViewById(R.id.id_tab_bottom_setting);
mTabBtnWeixin.setOnClickListener(this);
mTabBtnFrd.setOnClickListener(this);
mTabBtnAddress.setOnClickListener(this);
mTabBtnSettings.setOnClickListener(this);
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.id_tab_bottom_weixin:
setTabSelection(0);
break;
case R.id.id_tab_bottom_friend:
setTabSelection(1);
break;
case R.id.id_tab_bottom_contact:
setTabSelection(2);
break;
case R.id.id_tab_bottom_setting:
setTabSelection(3);
break;
default:
break;
}
}
/**
* 根据传入的index参数来设置选中的tab页。
*
*/
@SuppressLint("NewApi")
private void setTabSelection(int index) {
// 重置按钮
resetBtn();
// 开启一个Fragment事务
FragmentTransaction transaction = fragmentManager.beginTransaction();
// 先隐藏掉所有的Fragment，以防止有多个Fragment显示在界面上的情况
hideFragments(transaction);
switch (index) {
case 0:
// 当点击了消息tab时，改变控件的图片和文字颜色
((ImageButton) mTabBtnWeixin
.findViewById(R.id.btn_tab_bottom_weixin))
.setImageResource(R.drawable.tab_weixin_pressed);
if (mTab01 == null) {
// 如果MessageFragment为空，则创建一个并添加到界面上
mTab01 = new MainTab01();
transaction.add(R.id.id_content, mTab01);
} else {
// 如果MessageFragment不为空，则直接将它显示出来
transaction.show(mTab01);
}
break;
case 1:
// 当点击了消息tab时，改变控件的图片和文字颜色
((ImageButton) mTabBtnFrd.findViewById(R.id.btn_tab_bottom_friend))
.setImageResource(R.drawable.tab_find_frd_pressed);
if (mTab02 == null) {
// 如果MessageFragment为空，则创建一个并添加到界面上
mTab02 = new MainTab02();
transaction.add(R.id.id_content, mTab02);
} else {
// 如果MessageFragment不为空，则直接将它显示出来
transaction.show(mTab02);
}
break;
case 2:
// 当点击了动态tab时，改变控件的图片和文字颜色
((ImageButton) mTabBtnAddress
.findViewById(R.id.btn_tab_bottom_contact))
.setImageResource(R.drawable.tab_address_pressed);
if (mTab03 == null) {
// 如果NewsFragment为空，则创建一个并添加到界面上
mTab03 = new MainTab03();
transaction.add(R.id.id_content, mTab03);
} else {
// 如果NewsFragment不为空，则直接将它显示出来
transaction.show(mTab03);
}
break;
case 3:
// 当点击了设置tab时，改变控件的图片和文字颜色
((ImageButton) mTabBtnSettings
.findViewById(R.id.btn_tab_bottom_setting))
.setImageResource(R.drawable.tab_settings_pressed);
if (mTab04 == null) {
// 如果SettingFragment为空，则创建一个并添加到界面上
mTab04 = new MainTab04();
transaction.add(R.id.id_content, mTab04);
} else {
// 如果SettingFragment不为空，则直接将它显示出来
transaction.show(mTab04);
}
break;
}
transaction.commit();
}
/**
* 清除掉所有的选中状态。
*/
private void resetBtn() {
((ImageButton) mTabBtnWeixin.findViewById(R.id.btn_tab_bottom_weixin))
.setImageResource(R.drawable.tab_weixin_normal);
((ImageButton) mTabBtnFrd.findViewById(R.id.btn_tab_bottom_friend))
.setImageResource(R.drawable.tab_find_frd_normal);
((ImageButton) mTabBtnAddress.findViewById(R.id.btn_tab_bottom_contact))
.setImageResource(R.drawable.tab_address_normal);
((ImageButton) mTabBtnSettings
.findViewById(R.id.btn_tab_bottom_setting))
.setImageResource(R.drawable.tab_settings_normal);
}
/**
* 将所有的Fragment都置为隐藏状态。
*
* @param transaction
* 用于对Fragment执行操作的事务
*/
@SuppressLint("NewApi")
private void hideFragments(FragmentTransaction transaction) {
if (mTab01 != null) {
transaction.hide(mTab01);
}
if (mTab02 != null) {
transaction.hide(mTab02);
}
if (mTab03 != null) {
transaction.hide(mTab03);
}
if (mTab04 != null) {
transaction.hide(mTab04);
}
}
}
MainTab01 MainTab01 MainTab01 MainTab01
package com.example.mainframework02.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;
import com.example.mainframework02.R;
@SuppressLint("NewApi")
public class MainTab04 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View newsLayout = inflater.inflate(R.layout.main_tab_04, container,
false);
return newsLayout;
}
}