【移动应用开发技术】activity多个片段添加切换（没有用到viewpager）

【移动应用开发技术】activity多个片段添加切换（没有用到viewpager）

MainActivitypackagecom.example.test;importjava.util.ArrayList;importjava.util.List;importandroid.annotation.SuppressLint;importandroid.app.ActionBar;importandroid.os.Bundle;importandroid.support.v4.app.Fragment;importandroid.support.v4.app.FragmentActivity;importandroid.support.v4.app.FragmentTransaction;importandroid.view.View;importandroid.view.View.OnClickListener;publicclassMainActivityextendsFragmentActivityimplementsOnClickListener{ privateintcurrentTab;//当前Tab页面索引 privateList<Fragment>mFraments=null; @SuppressLint({"NewApi","CommitTransaction"}) @Override protectedvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initUI(); initFragment(); } privatevoidinitFragment(){ FragmentTransactionft=getSupportFragmentManager().beginTransaction(); ft.add(R.id.content,mFraments.get(currentTab)); mit();

findViewById(R.id.button1).setEnabled(false); } @SuppressLint("NewApi") privatevoidinitUI(){ ActionBaractionBar=getActionBar(); actionBar.hide(); mFraments=newArrayList<Fragment>(); mFraments.add(newOneFragment()); mFraments.add(newTwoFragment()); mFraments.add(newThreeFragment()); mFraments.add(newFourFragment()); findViewById(R.id.button1).setOnClickListener(this); findViewById(R.id.button2).setOnClickListener(this); findViewById(R.id.button3).setOnClickListener(this); findViewById(R.id.button4).setOnClickListener(this); } /** *切换tab *

*@paramidx */ privatestaticfinalint[]mids={R.id.button1,R.id.button2,R.id.button3,R.id.button4}; publicvoidshowTabById(intid){ for(inti=0;i<mids.length;i++){ if(id==mids[i]){ findViewById(mids[i]).setEnabled(false); Fragmentfragment=mFraments.get(i); FragmentTransactionft=obtainFragmentTransaction(i); fragment.onPause();//暂停当前tab if(fragment.isAdded()){ fragment.onResume();//启动目标tab的onResume() }else{ ft.add(R.id.content,fragment); //ft.addToBackStack(null);//在commit()方法之前，你//可以调用addToBackStack()，把这个transaction加入backstack中去，这个backstack是由activity管理//的，当用户按返回键时，就会回到上一个fragment的状态。 } ft.show(mFraments.get(i)); ft.hide(mFraments.get(currentTab)); mit(); currentTab=i; }else{ findViewById(mids[i]).setEnabled(true);//被按下的效果 } } } /** *获取一个带动画的FragmentTransaction *

*@paramindex *@return */ privateFragmentTransactionobtainFragmentTransaction(intindex){ FragmentTransactionft=getSupportFragmentManager().beginTransaction(); //设置切换动画 if(index>currentTab){ ft.setCustomAnimations(R.anim.slide_left_in,R.anim.slide_left_out); }else{ ft.setCustomAnimations(R.anim.slide_right_in,R.anim.slide_right_out); } returnft; } @Override publicvoidonClick(Viewv){ //TODOAuto-generatedmethodstub intid=v.getId(); if(id==R.id.button1){ showTabById(id); } if(id==R.id.button2){ showTabById(id); } if(id==R.id.button3){ showTabById(id); } if(id==R.id.button4){ showTabById(id); } }}activity_main<RelativeLayoutxmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:id="@+id/container"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.example.test.MainActivity"

tools:ignore="MergeRootFrame">

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:text="切換片段1"/>

<Button

android:id="@+id/button4"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:layout_toRightOf="@+id/button3"

android:text="切換片段4"/>

<FrameLayout

android:id="@+id/content"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:layout_alignParentLeft="true"

android:layout_alignParentRight="true"

android:layout_below="@+id/button3">

</FrameLayout>

<Button

android:id="@+id/button3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/button1"

android:layout_marginLeft="29dp"

android:text="切換片段3"/>

<Button

android:id="@+id/button2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/button4"

android:layout_below="@+id/button4"

android:layout_marginLeft="34dp"

android:text="切換片段2"/>

</RelativeLayout>第一个片段：/**

*Asimple{@linkandroid.support.v4.app.Fragment}subclass.

*

*/publicclassOneFragmentextendsFragment{ publicOneFragment(){ //Requiredemptypublicconstructor } @Override publicViewonCreateView(LayoutInflaterinflater,ViewGroupcontainer,BundlesavedInstanceState){ //Inflatethelayoutforthisfragment Viewinflate=inflater.inflate(R.layout.fragment_one,container,false); returninflate; }}第二个片段：/**

*Asimple{@linkandroid.support.v4.app.Fragment}subclass.

*

*/publicclassTwoFragmentextendsFragment{ publicTwoFragment(){ //Requiredemptypublicconstructor } @Override publicViewonCreateView(LayoutInflaterinflater,ViewGroupcontainer,BundlesavedInstanceState){ //Inflatethelayoutforthisfragment Viewinflate=inflater.inflate(R.layout.fragment_one,container,false); ((TextView)inflate.findViewById(R.id.textView1)).setText("2");

returninflate; }}第三个片段：/**

*Asimple{@linkandroid.support.v4.app.Fragment}subclass.

*

*/publicclassThreeFragmentextendsFragment{ publicTwoFragment(){ //Requiredemptypublicconstructor } @Override publicViewonCreateView(LayoutInflaterinflater,ViewGroupcontainer,BundlesavedInstanceState){ //Inflatethelayoutforthisfragment Viewinflate=inflater.inflate(R.layout.fragment_one,container,false); ((TextView)inflate.findViewById(R.id.textView1)).setText("3");

returninflate; }}第四个片段：/**

*Asimple{@linkandroid.support.v4.app.Fragment}subclass.

*

*/publicclassFourFragmentextendsFragment{ publicFourFragment(){ //Requiredemptypublicconstructor } @Override publicViewonCreateView(LayoutInflaterinflater,ViewGroupcontainer,BundlesavedInstanceState){ //Inflatethelayoutforthisfragment Viewinflate=inflater.inflate(R.layout.fragment_one,container,false); ((TextView)inflate.findViewById(R.id.textView1)).setText("4");

returninflate; }}fragment_one布局：<RelativeLayoutxmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.example.test.OneFragment">

<!--TODO:Updateblankfragmentlayout-->

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="1"/>

<EditText

android:id="@+id/editText1"

android:layout_width="176dp"

android:layout_height="wrap_content"

android:layout_below="@+id/textView1"

android:layout_marginLeft="21dp"

android:layout_marginTop="179dp"

android:layout_toRightOf="@+id/textView1"

android:ems="10"/></RelativeLayout>切