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我有一个应用程序与2个选项卡与几个控件Editext/Textviews/ListView和 我最近从Tabhost更改为Fragments/ViewPager。 当我启动应用程序时，两个选项卡的内容将同时绘制到屏幕上。 如果我选择另一个选项卡，则属于旧选项卡的控件不会被删除， 会导致混乱的屏幕。 如果我输入文本，EditText的提示也不会消失。 我也尝试了一个简化的布局（少控制）我成功。Android布局搞砸了（使用Fragments/Viewpager）
在我使用片段之前，这种东西没有发生。 任何想法我失踪？
---------------- activity_main.xml中----------------
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" />
<android.support.v4.app.fragment
android:id="@+id/DetailFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.app2.tabbedviews.FragmentDetailTab" />
<android.support.v4.app.fragment
android:id="@+id/ListFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.app2.tabbedviews.FragmentListTab" />
---- -------- listfragment.xml -------------------------
<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"
tools:context="FragmentListTab"
>
<ListView
......
</ListView>
------- ----- detailfragment.xml -------------------------
<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"
tools:context="FragmentDetailTab"
>
..... (some Editexts/textviews)
---------- - java -------------------------
import android.os.Bundle;
import android.provider.Settings.Secure;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBar.Tab;
import android.text.Editable;
import android.text.InputFilter;
import android.text.InputType;
import android.text.TextWatcher;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TableLayout;
import android.widget.TextView;
public class MainActivity extends android.support.v7.app.ActionBarActivity implements ActionBar.TabListener {
.............
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
lw = new LogWrapper(this);
setContentView(R.layout.activity_main);
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
Log.d(TAG, "setOnPageChangeListener, onPageSelected: ".concat(Integer.toString(position)));
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
// END_INCLUDE (fragment_pager_adapter)
final String TAG = "MainActivity";
final String[] asTags = {(String) getResources().getText(R.string.strFEFragmentTagDetail),
(String) getResources().getText(R.string.strFEFragmentTagList)};
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
public Fragment fetchFragment(int position) {
lw.dlog(TAG, "SectionsPagerAdapter, fetchFragment: ".concat(Integer.toString(position)));
String name = asTags[position];
Fragment oFragment = getSupportFragmentManager().findFragmentByTag(name);
return (oFragment);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment oFragment = null;
lw.dlog(TAG, "SectionsPagerAdapter, getItem: ".concat(Integer.toString(position)));
switch (position) {
case 0:
oFragment = new FragmentDetailTab();
break;
case 1:
oFragment = new FragmentListTab();
break;
}
return oFragment;
}
}
.........................
@Override
public void onTabReselected(Tab oTab,
android.support.v4.app.FragmentTransaction arg1) {
}
@Override
public void onTabSelected(Tab oTab,
android.support.v4.app.FragmentTransaction oFt) {
int nPos = oTab.getPosition();
Fragment oSPA = mSectionsPagerAdapter.getItem(nPos);
mViewPager.setCurrentItem(nPos);
oFt.attach(oSPA);
}
@Override
public void onTabUnselected(Tab oTab,
android.support.v4.app.FragmentTransaction oFt) {
// TODO Auto-generated method stub
Fragment oFragment = mSectionsPagerAdapter.fetchFragment(oTab.getPosition());
int nPos = oTab.getPosition();
lw.dlog(TAG, "onTabUnselected: ".concat(Integer.toString(nPos)));
oFt.detach(oFragment);
}
}
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FragmentFormulaTab extends Fragment {
public FragmentFormulaTab() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container,savedInstanceState);
Log.d(TAG, "onCreateView: ");
View rootView = inflater.inflate(R.layout.fe_formulafragment, container, false);
return rootView;
}
}
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FragmentListTab extends Fragment {
final String TAG = getTag();
public FragmentListTab() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container,savedInstanceState);
View rootView = inflater.inflate(R.layout.fe_listfragment, container, false);
return rootView;
}
}
我找到了解决方案。从XML中删除片段标签确实有窍门。 – user3356078