Question

我正在使用FragmentTabHost处理Fragment。我的FragmentTabHost有4个不同的fragments但是当我更改标签时，经过一些更改后，2或3个标签具有相同的片段。像index0 index1 index3有SettingFragment。但他们有不同的fragment。这是我在 MainActivityFragment 中设置标签的代码，它扩展了FragmentActivity

private void setTabs() {
    mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
    mTabHost.setup(this, getSupportFragmentManager(), android.R.id.tabcontent);



//  TabHost.TabSpec spec;
    //Intent intent;

     mTabHost.addTab(
                mTabHost.newTabSpec("tab1").setIndicator(null, getResources().getDrawable(R.drawable.icon_alert_tab)),
                AlertFragment.class, null);
        mTabHost.addTab(
                mTabHost.newTabSpec("tab2").setIndicator(null, getResources().getDrawable(R.drawable.icon_wlmuser_tab)),
                UserFragment.class, null);
        mTabHost.addTab(
                mTabHost.newTabSpec("tab3").setIndicator(null, getResources().getDrawable(R.drawable.icon_chat_tab)),
                ChatFragment.class, null);
        mTabHost.addTab(
                mTabHost.newTabSpec("tab4").setIndicator(null, getResources().getDrawable(R.drawable.icon_setting_tab)),
                SettingFragment.class, null);

        mTabHost.getTabWidget().setStripEnabled(false);
        mTabHost.setCurrentTab(1);
    }

我的4个片段是AlertFragment，UserFragment，ChatFragment，SettingFragment，它们有按钮。在点击按钮上，另一个片段由FragmentTransaction

打开 UserFragment中的

LIKE 我通过inviteBtn按钮

在FrameLayout中调用ContectFragment

inviteBtn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            // replace with contact fragment
            fragment = new ContactFragment();

            FragmentTransaction ft = getFragmentManager().beginTransaction();
            ft.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_left);
            ft.replace(android.R.id.tabcontent, fragment);
            ft.addToBackStack(null);
            // Start the animated transition.
            ft.commit();
        }
    });

。我在fragments内打开时会出现问题。

Answer 1

您好我已经解决了您的问题，请参阅以下解决方案。理想情况下，您必须创建一个额外的BaseContainerFragment。它有framelayout。接下来，为每个静态片段创建容器片段。假设我有两个片段与它相关的容器片段。见下面的代码。

原始片段：

AlertFragment.java
ChatFragment.java

BaseContainerFragment.java

公共类BaseContainerFragment扩展了Fragment {

    public BaseContainerFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    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() {
        boolean isPop = false;
        if (getChildFragmentManager().getBackStackEntryCount() > 0) {
            isPop = true;
            getChildFragmentManager().popBackStack();
        }
        return isPop;
    }

}

容器片段扩展了上面的BaseContainerFragment：

AlertContainerFragment.java扩展了BaseContainerFragment.java
ChatContainerFragment.java扩展了BaseContainerFragment.java

现在在FragmentActivity中，你必须在FragmentTabHost中添加每个片段的ContainerFragment。见下面的代码。

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.Menu;
import android.view.MenuItem;


public class TestSukhwantTabHost extends FragmentActivity  {

    private FragmentTabHost mTabHost;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test_sukhwant_tab_host);
        mTabHost = (FragmentTabHost) findViewById(R.id.tabhost);
        mTabHost.setup(this, getSupportFragmentManager(), R.id.tabFrameLayout);

        mTabHost.addTab(mTabHost.newTabSpec("tab1").setIndicator(null, getResources().getDrawable(R.drawable.ic_launcher)),AlertContainerFragment.class, null);
        mTabHost.addTab(mTabHost.newTabSpec("tab2").setIndicator(null, getResources().getDrawable(R.drawable.ic_launcher)),ChatContainerFragment.class, null);
        mTabHost.getTabWidget().setStripEnabled(false);
        mTabHost.setCurrentTab(0);
    }
}

现在我发布了Container Fragment代码，这个容器片段实际上加载了我们原来的Fragment。要在片段中加载片段，我们使用容器片段方法来替换新片段。

<强> fragment_base_container.xml

 <?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>

<强> AlertContainerFragment.java

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


public class AlertContainerFragment extends BaseContainerFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_base_container, container, false);
    }


    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        initView();
    }

    private void initView() {
        replaceFragment(new AlertFragment(), false);
    }
}

<强> ChatContainerFragment.java

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


public class ChatContainerFragment extends BaseContainerFragment {


    public ChatContainerFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_base_container, container, false);
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        initView();
    }

    private void initView() {
        replaceFragment(new ChatFragment(), false);
    }
}

原始片段：

以下是 AlertFragment.java

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;


public class AlertFragment extends Fragment {

    private Button framgnet1_button;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View mView = inflater.inflate(R.layout.fragment_alert, container, false);
        framgnet1_button = (Button) mView.findViewById(R.id.framgnet1_button);
        framgnet1_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ((BaseContainerFragment)getParentFragment()).replaceFragment(new DynamicAlertFramgnet(), false);
            }
        });
        return mView;
    }
}

<强> ChatFragment.java

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;


public class ChatFragment extends Fragment {

    private Button button_chart_fragment;

    public ChatFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View mView = inflater.inflate(R.layout.fragment_chat, container, false);
        button_chart_fragment = (Button)mView.findViewById(R.id.button_chart_fragment);
        button_chart_fragment.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ((BaseContainerFragment)getParentFragment()).replaceFragment(new DynamicChartFramgnet(), false);
            }
        });
        return mView;
    }
}

在我上面的代码实现中，每个原始片段在你点击时都有按钮，它会加载新的片段。

如果您有任何疑问，请告诉我。请求提出你的建议。

谢谢

片段在更改选项卡时在tabhost中重复

1 个答案: