android 首页fragment切换
方法一：
布局文件：
<?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" >
<FrameLayout
android:id="@+id/content_frame_main"
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="0dp" >
</FrameLayout>
<FrameLayout
android:id="@+id/content_frame_list"
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="0dp" >
</FrameLayout>
<FrameLayout
android:id="@+id/content_frame_personal"
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="0dp" >
</FrameLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/common_tabbar_height"
android:background="@drawable/common_border_top_selector"
android:layout_gravity="bottom"
android:clickable="true"
android:weightSum="3.0" >
<include layout="@layout/bottom_view" />
</LinearLayout>
</LinearLayout>
java文件：
BottomUtil buttom = new BottomUtil(this, 0);//初始化bottom_view.xml文件
View mMainContainerView = findViewById(R.id.content_frame_main);
View mListContainerView = findViewById(R.id.content_frame_list);
View mPersonalContainerView = findViewById(R.id.content_frame_personal);
点击切换时调用setShowMode方法：
public void setShowMode(int index) {
mListContainerView.setVisibility(View.GONE);
mMainContainerView.setVisibility(View.GONE);
mPersonalContainerView.setVisibility(View.GONE);
switch (index) {
case BottomUtil.MAIN_FRAGMENT:
if (mMainFragment == null) {
mMainFragment = new MainFragment();
//FragmentTransaction t = this.getSupportFragmentManager().beginTransaction();
FragmentTransaction t = this.getSupportFragmentManager().beginTransaction();
t.replace(R.id.content_frame_main, mMainFragment);
t.commit();
} else {
mMainFragment = (MainFragment) this.getSupportFragmentManager()
.findFragmentById(R.id.content_frame_main);
}
mMainContainerView.setVisibility(View.VISIBLE);
getSupply();
break;
case BottomUtil.JOBLIST_FRAGMENT:
if (mListFragment == null) {
mListFragment = new ListFragment();
FragmentTransaction t = this.getSupportFragmentManager()
.beginTransaction();
t.replace(R.id.content_frame_list, mListFragment);
t.commit();
} else {
mListFragment = (ListFragment)this.getSupportFragmentManager()
.findFragmentById(R.id.content_frame_list);
}
mListContainerView.setVisibility(View.VISIBLE);
break;
case BottomUtil.PERSONAL_FRAGMENT:
if (mPersonalFragment == null) {
mPersonalFragment = new PersonalFragment();
FragmentTransaction t = this.getSupportFragmentManager()
.beginTransaction();
t.replace(R.id.content_frame_personal, mPersonalFragment);
t.commit();
} else {
mPersonalFragment = (PersonalFragment) this
.getSupportFragmentManager().findFragmentById(
R.id.content_frame_personal);
}
mPersonalContainerView.setVisibility(View.VISIBLE);
break;
}
}
BottomUtil .java文件（加载初始化底部切换按钮）：
public class BottomUtil implements OnClickListener {
public static final int MAIN_FRAGMENT = 1;
public static final int JOBLIST_FRAGMENT = 2;
public static final int PERSONAL_FRAGMENT = 3;
MainActivity mContext;
/**
* 当前页面焦点,即显示的页面索引
*/
int mCurrentFocus = -1;
/**
* 底部菜单栏初始化所有控件类的一个实例
*/
BottomViewItem item;
public BottomUtil(MainActivity context, int index) {
mContext = context;
item = BottomViewItem.getInstance();
initTab(index);
}
/**
* 控件初始化
*/
private void initTab(int index) {
for (int i = 0; i < item.viewNum; i++) {
item.linears[i] = (LinearLayout) mContext
.findViewById(item.linears_id[i]);
item.linears[i].setOnClickListener(this);
item.images[i] = (ImageView) mContext
.findViewById(item.images_id[i]);
item.texts[i] = (TextView) mContext.findViewById(item.texts_id[i]);
}
setViewTab(index);
}
/**
* @param index
* 根据索引值切换背景
*/
private void setViewTab(int index) {
if (index == mCurrentFocus)
return;
mCurrentFocus = index;
for (int i = 0; i < item.viewNum; i++) {
item.images[i]
.setBackgroundResource(i == index ? item.images_selected[i]
: item.images_unselected[i]);
item.texts[i]
.setTextColor(i == index ? mContext.getResources().getColor(R.color.common_btn_main_pressed_color)
: mContext.getResources().getColor(R.color.common_textcolor_third));
}
}
@Override
public void onClick(View v) {
for (int i = 0; i < item.viewNum; i++) {
if (v.getId() == item.linears_id[i] && (i != mCurrentFocus)) {
/*if(i==2&&(!Preferences.isLogin())){
ToastUtil.make(mContext).show("您还没有登录");
return;
}*/
setViewTab(i);
// mContext.startActivity(new Intent(mContext,item.intents[i]));
mContext.setShowMode(i + 1);
}
}
}
}
方法二：
布局文件
<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/fl_page" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1"> </FrameLayout> <LinearLayout android:id="@+id/ll_main_tabbar" android:layout_width="match_parent" android:layout_height="@dimen/common_tabbar_height" android:background="@drawable/common_tabbar_bg" android:gravity="center" android:orientation="horizontal" android:paddingBottom="3dp" android:paddingTop="5dp"> <RelativeLayout android:id="@+id/ll_main_tabitem_service" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:clickable="true" android:gravity="center" android:onClick="onTabItemClick" android:orientation="vertical"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/iv_main_tabitem_service" android:layout_centerHorizontal="true" android:scaleType="fitCenter" android:src="@drawable/main_tabbar_service_selector" /> <TextView android:id="@+id/iv_main_tabitem_service" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:text="@string/common_tabbar_label_service" android:textColor="@drawable/common_tabbar_text_selector" android:textSize="@dimen/common_tabbar_textsize" /> </RelativeLayout> <RelativeLayout android:id="@+id/ll_main_tabitem_bbs" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:clickable="true" android:gravity="center" android:onClick="onTabItemClick" android:orientation="vertical"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/iv_main_tabitem_bbs" android:layout_centerHorizontal="true" android:scaleType="fitCenter" android:src="@drawable/main_tabbar_bbs_selector" /> <TextView android:id="@+id/iv_main_tabitem_bbs" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:text="@string/common_tabbar_label_bbs" android:textColor="@drawable/common_tabbar_text_selector" android:textSize="@dimen/common_tabbar_textsize" /> </RelativeLayout> <RelativeLayout android:id="@+id/ll_main_tabitem_news" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:clickable="true" android:gravity="center" android:onClick="onTabItemClick" android:orientation="vertical"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/iv_main_tabitem_news" android:layout_centerHorizontal="true" android:scaleType="fitCenter" android:src="@drawable/main_tabbar_news_selector" /> <TextView android:id="@+id/iv_main_tabitem_news" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:text="@string/common_tabbar_label_news" android:textColor="@drawable/common_tabbar_text_selector" android:textSize="@dimen/common_tabbar_textsize" /> </RelativeLayout> <RelativeLayout android:id="@+id/ll_main_tabitem_profile" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:clickable="true" android:gravity="center" android:onClick="onTabItemClick" android:orientation="vertical"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/iv_main_tabitem_profile" android:layout_centerHorizontal="true" android:scaleType="fitCenter" android:src="@drawable/main_tabbar_profile_selector" /> <TextView android:id="@+id/iv_main_tabitem_profile" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:text="@string/common_tabbar_label_profile" android:textColor="@drawable/common_tabbar_text_selector" android:textSize="@dimen/common_tabbar_textsize" /> </RelativeLayout> </LinearLayout></LinearLayout>
java文件：
public class MainActivity extends BaseActivity { private static final String FRAGMENT_TAG_SERVICE = "service"; private static final String FRAGMENT_TAG_BBS = "bbs"; private static final String FRAGMENT_TAG_NEWS = "news"; private static final String FRAGMENT_TAG_PROFILE = "profile"; private ServiceFragment mServiceFragment; private BbsFragment mBbsFragment; private NewsFragment mNewsFragment; private ProfileFragment mProfileFragment; private FragmentManager mFragmentManager; private View mCurTabItemView; private Fragment mFragment;//当前的Fragment @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mFragmentManager = getFragmentManager(); if (savedInstanceState != null) { //复活Fragment mServiceFragment = (ServiceFragment) mFragmentManager.findFragmentByTag(FRAGMENT_TAG_SERVICE); mBbsFragment = (BbsFragment) mFragmentManager.findFragmentByTag(FRAGMENT_TAG_BBS); mNewsFragment = (NewsFragment) mFragmentManager.findFragmentByTag(FRAGMENT_TAG_NEWS); mProfileFragment = (ProfileFragment) mFragmentManager.findFragmentByTag(FRAGMENT_TAG_PROFILE); FragmentTransaction fg = mFragmentManager.beginTransaction(); if (mProfileFragment != null) { if (mProfileFragment.isAdded()) { fg.hide(mProfileFragment); } } if (mNewsFragment != null) { if (mNewsFragment.isAdded()) { fg.hide(mNewsFragment); } } if (mBbsFragment != null) { if (mBbsFragment.isAdded()) { fg.hide(mBbsFragment); } } if (mServiceFragment != null) { if (mServiceFragment.isAdded()) { fg.hide(mServiceFragment); } } fg.commit(); Log.d("main", "fragment 被回收了，现在又复活了"); } onTabItemClick(findViewById(R.id.ll_main_tabitem_service)); } public void onTabItemClick(View v) { //TODO tab change if (mCurTabItemView == v) { return; } if (mCurTabItemView != null) { mCurTabItemView.setSelected(false); } mCurTabItemView = v; mCurTabItemView.setSelected(true); Fragment toFragment;//即将被显示的Fragment String tag; switch (v.getId()) { case R.id.ll_main_tabitem_service: if (mServiceFragment == null) { mServiceFragment = new ServiceFragment(); } tag = FRAGMENT_TAG_SERVICE; toFragment = mServiceFragment; break; case R.id.ll_main_tabitem_bbs: if (mBbsFragment == null) { mBbsFragment = new BbsFragment(); } tag = FRAGMENT_TAG_BBS; toFragment = mBbsFragment; break; case R.id.ll_main_tabitem_news: if (mNewsFragment == null) { mNewsFragment = new NewsFragment(); } tag = FRAGMENT_TAG_NEWS; toFragment = mNewsFragment; break; case R.id.ll_main_tabitem_profile: if (mProfileFragment == null) { mProfileFragment = new ProfileFragment(); } tag = FRAGMENT_TAG_PROFILE; toFragment = mProfileFragment; break; default: return; } if (mFragment == toFragment) { return; } FragmentTransaction fg = mFragmentManager.beginTransaction(); //交换Fragment if (toFragment.isAdded()) { //已经被添加了 if (mFragment != null) { fg.hide(mFragment); } fg.show(toFragment); } else { //没有被添加 if (mFragment != null) { fg.hide(mFragment); } fg.add(R.id.fl_page, toFragment, tag); } fg.commit(); mFragment = toFragment; }}
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