Fragment、FragmentTabHost以及RadioGroup框架
package com.dotfive.chuanbang.activity; import test.Fragment1; import test.Fragment1.OnBackListener; import test.Fragment2; import test.Fragment3; import test.Fragment4; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.widget.ImageView; import android.widget.TabHost.OnTabChangeListener; import android.widget.TabHost.TabSpec; import android.widget.TextView; import android.widget.Toast; import com.dotfive.chuanbang.R; //定义FragmentTabHost对象 //定义一个布局 //定义数组来存放Fragment界面 //定义数组来存放按钮图片 //Tab选项卡的文字 import com.dotfive.chuanbang.layout.SaveFragmentTabHost; /** * 在这里获取到每个需要用到的控件的实例，并给它们设置好必要的点击事件。 */ //实例化布局对象 //实例化TabHost对象，得到TabHost //得到fragment的个数 //为每一个Tab按钮设置图标、文字和内容 //将Tab按钮添加进Tab选项卡中 //设置Tab按钮的背景 /** * 给Tab按钮设置图标和文字 */ public class FragmentTabsActivity extends FragmentActivity { //定义FragmentTabHost对象 private SaveFragmentTabHost mTabHost; //定义一个布局 private LayoutInflater layoutInflater; // private RadioGroup mTabRg; //定义数组来存放Fragment界面 private final Class[] fragmentArray = { Fragment1.class, Fragment2.class, Fragment3.class, Fragment4.class }; //定义数组来存放按钮图片 private int mImageViewArray[] = { R.drawable.selector_tab, R.drawable.selector_tab, R.drawable.selector_tab, R.drawable.selector_tab, R.drawable.selector_tab }; //Tab选项卡的文字 private String mTextviewArray[] = { "首页", "消息", "好友", "广场", "更多" }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initViews(); } /** * 在这里获取到每个需要用到的控件的实例，并给它们设置好必要的点击事件。 */ private void initViews() { //实例化布局对象 layoutInflater = LayoutInflater.from(this); //实例化TabHost对象，得到TabHost mTabHost = (SaveFragmentTabHost) findViewById(android.R.id.tabhost); mTabHost.setOnTabChangedListener(new OnTabChangeListener() { @Override public void onTabChanged(String arg0) { Log.e("X", "++++++++++++++" + arg0); } }); mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent); // 得到fragment的个数 int count = fragmentArray.length; for (int i = 0; i < count; i++) { // 为每一个Tab按钮设置图标、文字和内容 // TabSpec tabSpec = mTabHost.newTabSpec(i + "").setIndicator(i + ""); // TabSpec tabSpec = mTabHost.newTabSpec(mTextviewArray[i]).setIndicator(i + ""); TabSpec tabSpec = mTabHost.newTabSpec(mTextviewArray[i]).setIndicator(getTabItemView(i)); //将Tab按钮添加进Tab选项卡中 mTabHost.addTab(tabSpec, fragmentArray[i], null); //设置Tab按钮的背景 mTabHost.getTabWidget().getChildAt(i).setBackgroundResource(R.drawable.selector_tab); } // mTabRg = (RadioGroup) findViewById(R.id.tab_rg_menu); // mTabRg.setOnCheckedChangeListener(new OnCheckedChangeListener() { // @Override // public void onCheckedChanged(RadioGroup group, int checkedId) { // switch (checkedId) { // case R.id.tab_rb_1: // mTabHost.setCurrentTab(0); // break; // case R.id.tab_rb_2: // mTabHost.setCurrentTab(1); // break; // case R.id.tab_rb_3: // mTabHost.setCurrentTab(2); // break; // case R.id.tab_rb_4: // mTabHost.setCurrentTab(3); // break; // default: // break; // } // } // }); // mTabHost.setCurrentTab(0); } /** * 给Tab按钮设置图标和文字 */ private View getTabItemView(int index) { View view = layoutInflater.inflate(R.layout.tab_item_view, null); ImageView imageView = (ImageView) view.findViewById(R.id.imageview); imageView.setImageResource(mImageViewArray[index]); TextView textView = (TextView) view.findViewById(R.id.textview); textView.setText(mTextviewArray[index]); return view; } }
保存Fragment状态的TabHost
/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.dotfive.chuanbang.layout; import java.util.ArrayList; import android.content.Context; import android.content.res.TypedArray; import android.os.Bundle; import android.os.Parcel; import android.os.Parcelable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.util.AttributeSet; import android.view.View; import android.view.ViewGroup; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.TabHost; import android.widget.TabWidget; /** * Special TabHost that allows the use of {@link Fragment} objects for its tab * content. When placing this in a view hierarchy, after inflating the hierarchy * you must call {@link #setup(Context, FragmentManager, int)} to complete the * initialization of the tab host. * * <p> * Here is a simple example of using a FragmentTabHost in an Activity: * * {@sample * development/samples/Support4Demos/src/com/example/android/supportv4/app/ * FragmentTabs.java complete} * * <p> * This can also be used inside of a fragment through fragment nesting: * * {@sample * development/samples/Support4Demos/src/com/example/android/supportv4/app/ * FragmentTabsFragmentSupport.java complete} */ public class SaveFragmentTabHost extends TabHost implements TabHost.OnTabChangeListener { private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>(); private FrameLayout mRealTabContent; private Context mContext; private FragmentManager mFragmentManager; private int mContainerId; private TabHost.OnTabChangeListener mOnTabChangeListener; private TabInfo mLastTab; private boolean mAttached; static final class TabInfo { private final String tag; private final Class<?> clss; private final Bundle args; private Fragment fragment; TabInfo(String _tag, Class<?> _class, Bundle _args) { tag = _tag; clss = _class; args = _args; } } static class DummyTabFactory implements TabHost.TabContentFactory { private final Context mContext; public DummyTabFactory(Context context) { mContext = context; } @Override public View createTabContent(String tag) { View v = new View(mContext); v.setMinimumWidth(0); v.setMinimumHeight(0); return v; } } static class SavedState extends BaseSavedState { String curTab; SavedState(Parcelable superState) { super(superState); } private SavedState(Parcel in) { super(in); curTab = in.readString(); } @Override public void writeToParcel(Parcel out, int flags) { super.writeToParcel(out, flags); out.writeString(curTab); } @Override public String toString() { return "FragmentTabHost.SavedState{" + Integer.toHexString(System.identityHashCode(this)) + " curTab=" + curTab + "}"; } public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() { public SavedState createFromParcel(Parcel in) { return new SavedState(in); } public SavedState[] newArray(int size) { return new SavedState[size]; } }; } public SaveFragmentTabHost(Context context) { // Note that we call through to the version that takes an AttributeSet, // because the simple Context construct can result in a broken object! super(context, null); initFragmentTabHost(context, null); } public SaveFragmentTabHost(Context context, AttributeSet attrs) { super(context, attrs); initFragmentTabHost(context, attrs); } private void initFragmentTabHost(Context context, AttributeSet attrs) { TypedArray a = context.obtainStyledAttributes(attrs, new int[] { android.R.attr.inflatedId }, 0, 0); mContainerId = a.getResourceId(0, 0); a.recycle(); super.setOnTabChangedListener(this); } private void ensureHierarchy(Context context) { // If owner hasn't made its own view hierarchy, then as a convenience // we will construct a standard one here. if (findViewById(android.R.id.tabs) == null) { LinearLayout ll = new LinearLayout(context); ll.setOrientation(LinearLayout.VERTICAL); addView(ll, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); TabWidget tw = new TabWidget(context); tw.setId(android.R.id.tabs); tw.setOrientation(TabWidget.HORIZONTAL); ll.addView(tw, new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, 0)); FrameLayout fl = new FrameLayout(context); fl.setId(android.R.id.tabcontent); ll.addView(fl, new LinearLayout.LayoutParams(0, 0, 0)); mRealTabContent = fl = new FrameLayout(context); mRealTabContent.setId(mContainerId); ll.addView(fl, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0, 1)); } } /** * @deprecated Don't call the original TabHost setup, you must instead call * {@link #setup(Context, FragmentManager)} or * {@link #setup(Context, FragmentManager, int)}. */ @Override @Deprecated public void setup() { throw new IllegalStateException("Must call setup() that takes a Context and FragmentManager"); } public void setup(Context context, FragmentManager manager) { ensureHierarchy(context); // Ensure views required by super.setup() super.setup(); mContext = context; mFragmentManager = manager; ensureContent(); } public void setup(Context context, FragmentManager manager, int containerId) { ensureHierarchy(context); // Ensure views required by super.setup() super.setup(); mContext = context; mFragmentManager = manager; mContainerId = containerId; ensureContent(); mRealTabContent.setId(containerId); // We must have an ID to be able to save/restore our state. If // the owner hasn't set one at this point, we will set it ourself. if (getId() == View.NO_ID) { setId(android.R.id.tabhost); } } private void ensureContent() { if (mRealTabContent == null) { mRealTabContent = (FrameLayout) findViewById(mContainerId); if (mRealTabContent == null) { throw new IllegalStateException("No tab content FrameLayout found for id " + mContainerId); } } } @Override public void setOnTabChangedListener(OnTabChangeListener l) { mOnTabChangeListener = l; } public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) { tabSpec.setContent(new DummyTabFactory(mContext)); String tag = tabSpec.getTag(); TabInfo info = new TabInfo(tag, clss, args); if (mAttached) { // If we are already attached to the window, then check to make // sure this tab's fragment is inactive if it exists. This shouldn't // normally happen. info.fragment = mFragmentManager.findFragmentByTag(tag); if (info.fragment != null && !info.fragment.isDetached()) { FragmentTransaction ft = mFragmentManager.beginTransaction(); // ft.detach(info.fragment); ft.hide(info.fragment); ft.commit(); } } mTabs.add(info); addTab(tabSpec); } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); String currentTab = getCurrentTabTag(); // Go through all tabs and make sure their fragments match // the correct state. FragmentTransaction ft = null; for (int i = 0; i < mTabs.size(); i++) { TabInfo tab = mTabs.get(i); tab.fragment = mFragmentManager.findFragmentByTag(tab.tag); // if (tab.fragment != null && !tab.fragment.isDetached()) { if (tab.fragment != null) { if (tab.tag.equals(currentTab)) { // The fragment for this tab is already there and // active, and it is what we really want to have // as the current tab. Nothing to do. mLastTab = tab; } else { // This fragment was restored in the active state, // but is not the current tab. Deactivate it. if (ft == null) { ft = mFragmentManager.beginTransaction(); } // ft.detach(tab.fragment); ft.hide(tab.fragment); } } } // We are now ready to go. Make sure we are switched to the // correct tab. mAttached = true; ft = doTabChanged(currentTab, ft); if (ft != null) { ft.commit(); mFragmentManager.executePendingTransactions(); } } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); mAttached = false; } @Override protected Parcelable onSaveInstanceState() { Parcelable superState = super.onSaveInstanceState(); SavedState ss = new SavedState(superState); ss.curTab = getCurrentTabTag(); return ss; } @Override protected void onRestoreInstanceState(Parcelable state) { SavedState ss = (SavedState) state; super.onRestoreInstanceState(ss.getSuperState()); setCurrentTabByTag(ss.curTab); } @Override public void onTabChanged(String tabId) { if (mAttached) { FragmentTransaction ft = doTabChanged(tabId, null); if (ft != null) { ft.commit(); } } if (mOnTabChangeListener != null) { mOnTabChangeListener.onTabChanged(tabId); } } private FragmentTransaction doTabChanged(String tabId, FragmentTransaction ft) { TabInfo newTab = null; for (int i = 0; i < mTabs.size(); i++) { TabInfo tab = mTabs.get(i); if (tab.tag.equals(tabId)) { newTab = tab; } } if (newTab == null) { throw new IllegalStateException("No tab known for tag " + tabId); } if (mLastTab != newTab) { if (ft == null) { ft = mFragmentManager.beginTransaction(); } if (mLastTab != null) { if (mLastTab.fragment != null) { // ft.detach(mLastTab.fragment); ft.hide(mLastTab.fragment); } } if (newTab != null) { if (newTab.fragment == null) { newTab.fragment = Fragment.instantiate(mContext, newTab.clss.getName(), newTab.args); ft.add(mContainerId, newTab.fragment, newTab.tag); } else { // ft.attach(newTab.fragment); ft.show(newTab.fragment); } } mLastTab = newTab; } return ft; } }
用RadioGroup、LinearLayout、以及FragmentTabHost 创建button操作栏
<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" > <FrameLayout android:id="@+id/realtabcontent" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" /> <!-- <RelativeLayout --> <!-- android:layout_width="match_parent" --> <!-- android:layout_height="wrap_content" --> <!-- android:background="@color/black" > --> <!-- <RadioGroup --> <!-- android:id="@+id/tab_rg_menu" --> <!-- android:layout_width="match_parent" --> <!-- android:layout_height="wrap_content" --> <!-- android:background="@drawable/selector_tab" --> <!-- android:orientation="horizontal" > --> <!-- <RadioButton --> <!-- android:id="@+id/tab_rb_1" --> <!-- style="@style/tab_rb_style" --> <!-- android:checked="true" --> <!-- android:drawableTop="@drawable/bt_search_close_pressed" --> <!-- android:text="微信" /> --> <!-- <RadioButton --> <!-- android:id="@+id/tab_rb_2" --> <!-- style="@style/tab_rb_style" --> <!-- android:text="通讯录" /> --> <!-- <RadioButton --> <!-- android:id="@+id/tab_rb_3" --> <!-- style="@style/tab_rb_style" --> <!-- android:text="发现" /> --> <!-- <RadioButton --> <!-- android:id="@+id/tab_rb_4" --> <!-- style="@style/tab_rb_style" --> <!-- android:text="我" /> --> <!-- <RadioButton --> <!-- android:id="@+id/tab_rb_5" --> <!-- style="@style/tab_rb_style" --> <!-- android:text="我" /> --> <!-- </RadioGroup> --> <!-- <LinearLayout --> <!-- android:layout_width="match_parent" --> <!-- android:layout_height="55dp" --> <!-- android:baselineAligned="false" --> <!-- android:orientation="horizontal" > --> <!-- <LinearLayout --> <!-- android:id="@+id/home_layout" --> <!-- android:layout_width="0dp" --> <!-- android:layout_height="match_parent" --> <!-- android:layout_weight="1" --> <!-- android:gravity="center" --> <!-- android:orientation="vertical" > --> <!-- <TextView --> <!-- android:id="@+id/home_icon" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/fontHome" --> <!-- android:textColor="@color/gray" /> --> <!-- <TextView --> <!-- android:id="@+id/home_text" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/stringHome" --> <!-- android:textColor="@color/gray" --> <!-- android:textSize="15.0dp" /> --> <!-- </LinearLayout> --> <!-- <LinearLayout --> <!-- android:id="@+id/celebrity_layout" --> <!-- android:layout_width="0dp" --> <!-- android:layout_height="match_parent" --> <!-- android:layout_weight="1" --> <!-- android:gravity="center" --> <!-- android:orientation="vertical" > --> <!-- <TextView --> <!-- android:id="@+id/celebrity_icon" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/fontCelebrity" --> <!-- android:textColor="@color/gray" /> --> <!-- <TextView --> <!-- android:id="@+id/celebrity_text" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/stringCelebrity" --> <!-- android:textColor="@color/gray" /> --> <!-- </LinearLayout> --> <!-- <LinearLayout --> <!-- android:id="@+id/brand_layout" --> <!-- android:layout_width="0dp" --> <!-- android:layout_height="match_parent" --> <!-- android:layout_weight="1" --> <!-- android:gravity="center" --> <!-- android:orientation="vertical" > --> <!-- <TextView --> <!-- android:id="@+id/brand_icon" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/fontBrand" --> <!-- android:textColor="@color/gray" /> --> <!-- <TextView --> <!-- android:id="@+id/brand_text" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/stringBrand" --> <!-- android:textColor="@color/gray" --> <!-- android:textSize="15.0dp" /> --> <!-- </LinearLayout> --> <!-- <LinearLayout --> <!-- android:id="@+id/explore_layout" --> <!-- android:layout_width="0dp" --> <!-- android:layout_height="match_parent" --> <!-- android:layout_weight="1" --> <!-- android:gravity="center" --> <!-- android:orientation="vertical" > --> <!-- <TextView --> <!-- android:id="@+id/explore_icon" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/fontExplore" --> <!-- android:textColor="@color/gray" /> --> <!-- <TextView --> <!-- android:id="@+id/explore_text" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/stringExplore" --> <!-- android:textColor="@color/gray" --> <!-- android:textSize="15.0dp" /> --> <!-- </LinearLayout> --> <!-- <LinearLayout --> <!-- android:id="@+id/more_layout" --> <!-- android:layout_width="0dp" --> <!-- android:layout_height="match_parent" --> <!-- android:layout_weight="1" --> <!-- android:gravity="center" --> <!-- android:orientation="vertical" > --> <!-- <TextView --> <!-- android:id="@+id/more_icon" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/fontMore" --> <!-- android:textColor="@color/gray" /> --> <!-- <TextView --> <!-- android:id="@+id/more_text" --> <!-- android:layout_width="wrap_content" --> <!-- android:layout_height="wrap_content" --> <!-- android:text="@string/stringMore" --> <!-- android:textColor="@color/gray" --> <!-- android:textSize="15.0dp" /> --> <!-- </LinearLayout> --> <!-- </LinearLayout> --> <!-- </RelativeLayout> --> <com.dotfive.chuanbang.layout.SaveFragmentTabHost android:id="@android:id/tabhost" android:layout_width="match_parent" android:layout_height="wrap_content"> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="0dp" android:layout_height="0dp" android:layout_weight="0" /> </com.dotfive.chuanbang.layout.SaveFragmentTabHost> </LinearLayout>
<!-- tabBar --> <style name="tab_rb_style"> <item name="android:layout_width">0dp</item> <item name="android:layout_height">55dp</item> <item name="android:layout_weight">1</item> <item name="android:button">@null</item> <item name="android:textColor">@drawable/font_color_gray</item> <item name="android:textSize">15.0dp</item> <item name="android:gravity">center_horizontal|bottom</item> <item name="android:layout_gravity">bottom</item> <item name="android:background">@drawable/selector_tab</item> </style>
如果不需要背景色，就别加foucs
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- <item android:drawable="@drawable/home_btn_bg" android:state_pressed="true"/> -->
<item android:drawable="@drawable/home_btn_bg" android:state_selected="true"/> </selector>
itemView
<?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="wrap_content" android:gravity="center" android:orientation="vertical" > <ImageView android:id="@+id/imageview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:focusable="false" android:padding="3dp" android:src="@drawable/selector_tab"> </ImageView> <TextView android:id="@+id/textview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="首页" android:textSize="10sp" android:textColor="#ffffff"> </TextView> </LinearLayout>