dynamic更改片段选项卡主机内的片段？
我有一个主要的活动，这是片段活动在这里我设置两个选项卡与B片段中的两个片段A和B我有一个button，当用户单击button我想要将片段B更改为片段C.但上面的选项卡是可见的…
我怎样才能实现replace标签内的碎片？
任何解决scheme，非常感谢。
基本概念 – 我们可以通过创build一个容器来实现这一点。 每个选项卡将分配一个特定的容器。 现在，当我们需要一个新的片段，然后我们将使用此容器replace相同的。
请按照下面的代码逐步进行更好的理解。 第1步：为您的应用程序创build选项卡。 说“Home.java”。 它将包含使用片段创build选项卡的代码。
import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentTabHost; import android.widget.TextView; import app.drugs.talksooner.container.GoContainerFragment; import app.drugs.talksooner.container.LearnContainerFragment; import app.drugs.talksooner.container.MoreContainerFragment; import app.drugs.talksooner.container.TalkContainerFragment; import app.drugs.talksooner.container.WatchContainerFragment; import app.drugs.talksooner.utils.BaseContainerFragment; public class Home extends FragmentActivity { private static final String TAB_1_TAG = "tab_1"; private static final String TAB_2_TAG = "tab_2"; private static final String TAB_3_TAG = "tab_3"; private static final String TAB_4_TAG = "tab_4"; private static final String TAB_5_TAG = "tab_5"; private FragmentTabHost mTabHost; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.home); initView(); } private void initView() { mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost); mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent); // mTabHost.addTab(mTabHost.newTabSpec(TAB_1_TAG).setIndicator("Talk", getResources().getDrawable(R.drawable.ic_launcher)), TalkContainerFragment.class, null); mTabHost.addTab(mTabHost.newTabSpec(TAB_1_TAG).setIndicator("Talk"), TalkContainerFragment.class, null); mTabHost.addTab(mTabHost.newTabSpec(TAB_2_TAG).setIndicator("Learn"), LearnContainerFragment.class, null); mTabHost.addTab(mTabHost.newTabSpec(TAB_3_TAG).setIndicator("Go"), GoContainerFragment.class, null); mTabHost.addTab(mTabHost.newTabSpec(TAB_4_TAG).setIndicator("Watch"), WatchContainerFragment.class, null); mTabHost.addTab(mTabHost.newTabSpec(TAB_5_TAG).setIndicator("More"), MoreContainerFragment.class, null); /* Increase tab height programatically * tabs.getTabWidget().getChildAt(1).getLayoutParams().height = 150; */ for (int i = 0; i < mTabHost.getTabWidget().getChildCount(); i++) { final TextView tv = (TextView) mTabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title); if (tv == null) continue; else tv.setTextSize(10); } } @Override public void onBackPressed() { boolean isPopFragment = false; String currentTabTag = mTabHost.getCurrentTabTag(); if (currentTabTag.equals(TAB_1_TAG)) { isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_1_TAG)).popFragment(); } else if (currentTabTag.equals(TAB_2_TAG)) { isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_2_TAG)).popFragment(); } else if (currentTabTag.equals(TAB_3_TAG)) { isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_3_TAG)).popFragment(); } else if (currentTabTag.equals(TAB_4_TAG)) { isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_4_TAG)).popFragment(); } else if (currentTabTag.equals(TAB_5_TAG)) { isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_5_TAG)).popFragment(); } if (!isPopFragment) { finish(); } } } 你的home.xml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/realtabcontent" android:layout_width="match_parent" android:layout_height="0dip" android:layout_weight="1" /> <android.support.v4.app.FragmentTabHost android:id="@android:id/tabhost" android:layout_width="match_parent" android:layout_height="wrap_content" > <FrameLayout android:id="@android:id/tabcontent" android:layout_width="0dip" android:layout_height="0dip" android:layout_weight="0" /> </android.support.v4.app.FragmentTabHost> </LinearLayout>
第二步：定义Base容器片段，这将有助于回溯和replace片段“check out replaceFragement（）”。 我们的类“BaseContainerFragment.java”
import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.util.Log; import app.drugs.talksooner.R; public class BaseContainerFragment extends Fragment { public void replaceFragment(Fragment fragment, boolean addToBackStack) { FragmentTransaction transaction = getChildFragmentManager().beginTransaction(); if (addToBackStack) { transaction.addToBackStack(null); } transaction.replace(R.id.container_framelayout, fragment); transaction.commit(); getChildFragmentManager().executePendingTransactions(); } public boolean popFragment() { Log.e("test", "pop fragment: " + getChildFragmentManager().getBackStackEntryCount()); boolean isPop = false; if (getChildFragmentManager().getBackStackEntryCount() > 0) { isPop = true; getChildFragmentManager().popBackStack(); } return isPop; } }
第三步：现在我正在考虑一个片段，希望能以同样的方式来处理你的rest。 定义容器片段类。 每个选项卡将具有特定的容器。 说第一个标签的TalkContainerFragment.java
import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import app.drugs.talksooner.R; import app.drugs.talksooner.Talk; import app.drugs.talksooner.utils.BaseContainerFragment; public class TalkContainerFragment extends BaseContainerFragment { private boolean mIsViewInited; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Log.e("test", "tab 1 oncreateview"); return inflater.inflate(R.layout.container_fragment, null); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); Log.e("test", "tab 1 container on activity created"); if (!mIsViewInited) { mIsViewInited = true; initView(); } } private void initView() { Log.e("test", "tab 1 init view"); replaceFragment(new Talk(), false); } }
这是XML文件。 “container_fragment.xml”这个xml容器包含frameLayout。 我们将使用这个ID来replace不同的碎片。
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/container_framelayout" android:layout_width="match_parent" android:layout_height="match_parent"> </FrameLayout>
你的主要课程 “Talk.java”
public class Talk extends Fragment { /** Define global variables over here */ //private ProgressDialog pDialog; StaticApiList sal; TalkModelAll tma; JSONObject myJasonObject = null; private ListView lv; private ArrayList<TalkModelAll> m_ArrayList = null; //ArrayList<String> stringArrayList = new ArrayList<String>(); TalkArrayAdapter taa; Set<String> uniqueValues = new HashSet<String>(); TextView rowTextView = null; boolean vivek = false; int postid; String title; String thumsrc; String largeimg; String excert; String description; String cat; String myUrl; String jsonString; int mCurCheckPosition; String check_state = null; String ccc; LinearLayout myLinearLayout; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.talk, container, false); Button btn = (Button) rootView.findViewById(R.id.your_btn_id); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub //Here TalkDetail is name of class that needs to open TalkDetail fragment = new TalkDetail(); // if U need to pass some data Bundle bundle = new Bundle(); bundle.putString("title", m_ArrayList.get(arg2).title); bundle.putString("largeimg", m_ArrayList.get(arg2).largeimg); bundle.putString("excert", m_ArrayList.get(arg2).excert); bundle.putString("description", m_ArrayList.get(arg2).description); bundle.putString("cat", m_ArrayList.get(arg2).cat); //bundle.putInt("postid", m_ArrayList.get(arg2).postid); fragment.setArguments(bundle); ((BaseContainerFragment)getParentFragment()).replaceFragment(fragment, true); } }); return rootView; } }
而已。 你已准备好出发。 整个魔术在于呼唤R.id. 而不是R.layout。 干杯!
