已阅读有关此主题的所有问题/答案，但我无法让其中任何一个为我工作.aggghh
我有 3 个操作栏选项卡
tab1 调用/使用动态显示“添加”按钮的片段
单击按钮时，我希望它自己删除“按钮片段”并将其替换为具有一堆 EditTexts 的片段
这按预期工作。但是，当我单击另一个选项卡时，例如调用自己的片段的 tab2，来自 tab1 的 EditTexts 片段仍然存在并覆盖 tab2 片段
我认为理解我正在尝试做的事情从根本上是错误的，即一个片段不能调用另一个片段来替换自己？或者不知何故我没有正确删除以前的片段以及与backstack有关的东西..???? 或显示和隐藏 xml?????
我对此很陌生，完全困惑！请帮助...提前谢谢你:)
这是我使用 TabCompat.zip 示例从 android 网站http://developer.android.com/training/backward-compatible-ui/index.html 获取最多的代码
MainActivity.java
package com.example.android.tabcompat;
public class MainActivity extends TabCompatActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TabHelper tabHelper = getTabHelper();
CompatTab tab1Tab = tabHelper.newTab("tab1")
.setText(R.string.tab_tab1)
.setTabListener(new InstantiatingTabListener(this,"A", Tab1Fragment.class));
tabHelper.addTab(tab1Tab);
CompatTab tab2Tab = tabHelper.newTab("tab2")
.setText(R.string.tab_tab2)
.setTabListener(new InstantiatingTabListener(this, "B", Tab2Fragment.class));
tabHelper.addTab(tab2Tab);
CompatTab tab3Tab = tabHelper.newTab("tab3")
.setText(R.string.tab_tab3)
.setTabListener(new InstantiatingTabListener(this,"C", Tab3Fragment.class));
tabHelper.addTab(tab3Tab);
}
/**
* Implementation of {@link CompatTabListener} to handle tab change events. This implementation
* instantiates the specified fragment class with no arguments when its tab is selected.
*/
public static class InstantiatingTabListener implements CompatTabListener {
private final TabCompatActivity mActivity;
private final Class mClass;
/**
* Constructor used each time a new tab is created.
* @param activity The host Activity, used to instantiate the fragment
* @param cls The class representing the fragment to instantiate
*/
public InstantiatingTabListener(TabCompatActivity activity, String tag, Class<? extends Fragment> cls) {
mActivity = activity;
mClass = cls;
}
/* The following are each of the ActionBar.TabListener Callback */
@Override
public void onTabSelected(CompatTab tab, FragmentTransaction ft) {
// Check if the fragment is already initialised
Fragment fragment = tab.getFragment();
if (fragment == null) {
// If not, instantiate and add it to the activity
fragment = Fragment.instantiate(mActivity, mClass.getName());
tab.setFragment(fragment);
ft.add(android.R.id.tabcontent, fragment, tab.getTag());
}
else {
// If it exists, simply attach it in order to show it
ft.attach(fragment);
}
}
public void onTabUnselected(CompatTab tab, FragmentTransaction ft) {
Fragment fragment = tab.getFragment();
if (fragment != null) {
ft.detach(fragment);
}
}
@Override
public void onTabReselected(CompatTab tab, FragmentTransaction ft) {
// User selected the already selected tab. Do nothing.
} }
}
Tab1Fragment.java这是加载“添加按钮”的位置
package com.example.android.tabcompat;
public class Tab1Fragment extends Fragment{
protected int position;
//display the add tab1 button
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final Button btn = new Button (getActivity());
btn.setGravity(Gravity.TOP);
btn.setText(R.string.btn_tab1);
btn.setId(1);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//when button is clicked replace the button and display the tab1 form fragment
FragmentManager fragmentManager = getFragmentManager();
Tab1FormFragment formFragment = new Tab1FormFragment();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(android.R.id.tabcontent, formFragment);
transaction.addToBackStack(null);
transaction.commit();
}
});
return btn;
}
}
Tab1FormFragment.java此片段显示从布局文件 form.xml 获取的 edittext 视图形式
package com.example.android.tabcompat;
public class Tab1FormFragment extends Fragment {
protected static final String ARG_POSITION = null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View myFragmentView = inflater.inflate(R.layout.form, container, false);
return myFragmentView;
}
}
表单.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/petForm"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageButton
android:id="@+id/imageButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_tab_photos" />
<EditText
android:id="@+id/editTextName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/field_name"
android:inputType="text" />
<EditText
android:id="@+id/editTextAge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/field_age"
android:inputType="text" />
<EditText
android:id="@+id/editTextBreed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/field_breed"
android:inputType="text" />
<Spinner
android:id="@+id/spinnerSex"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:entries="@array/sex_arrays"
android:hint="@string/field_sex" />
<Button
android:id="@+id/savePet"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/save_record" />
</LinearLayout>`