我有一个主要活动，这里是片段活动 我在 B 片段中设置两个带有两个片段 A 和 B 的选项卡 当用户单击按钮时我有一个按钮我想将片段 B 更改为片段 C。但是上面的选项卡可见...
如何实现替换选项卡内的片段？
非常感谢任何解决方案。
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基本概念——我们可以通过创建一个容器来实现这一点。每个选项卡都将分配一个特定的容器。现在，当我们需要一个新片段时，我们将使用这个容器替换它。
请按照下面提到的代码一步一步来更好地理解。第 1 步：为您的应用创建选项卡。说“Home.java”。它将包含使用片段创建选项卡的代码。
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();
}
}
}
您的 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>
步骤 2：定义 Base 容器片段，这将有助于片段的回溯和替换“检查 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：现在我在这里考虑一个片段，只希望你能以同样的方式处理休息。定义容器片段类。每个选项卡都有特定的容器。说第一个选项卡的 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 来替换不同的 Fragment。
<?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。“谈话.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。整个魔力在于调用 R.id。而不是 R.layout。干杯!
于 2013-11-08T13:08:51.047 回答