如何为片段和动作条的应用，该应用支持Android 2.2+设备的支持？ [英] How to provide support for Fragments and ActionBar for App which supports Android 2.2+ devices?
本文介绍了如何为片段和动作条的应用，该应用支持Android 2.2+设备的支持？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我曾参观过这么多的类似链接这样即<一个href=\"http://stackoverflow.com/questions/6528691/fragments-in-android-2-2-1-2-3-2-0-is-this-possible\">1, 2 遵循各种例子/链接即的这个并的这个主要是我按照这个职位从的 Vogella 的太多次，每次我得到相同的异常....可能是什么原因呢？
I have visited so many similar links like this i.e 1, 2 followed various examples / links i.e. this one and this one mainly I have followed this post from Vogella that too multiple times, Every time I get same exception.... What could be the reason ?
07-27 12:00:33.431: E/AndroidRuntime(663): FATAL EXCEPTION: main
07-27 12:00:33.431: E/AndroidRuntime(663): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myexample.fragmentdemoexample/com.myexample.fragmentsupportexample.MainFragmentActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.access$600(ActivityThread.java:123)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.os.Handler.dispatchMessage(Handler.java:99)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.os.Looper.loop(Looper.java:137)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.main(ActivityThread.java:4424)
07-27 12:00:33.431: E/AndroidRuntime(663): at java.lang.reflect.Method.invokeNative(Native Method)
07-27 12:00:33.431: E/AndroidRuntime(663): at java.lang.reflect.Method.invoke(Method.java:511)
07-27 12:00:33.431: E/AndroidRuntime(663): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
07-27 12:00:33.431: E/AndroidRuntime(663): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
07-27 12:00:33.431: E/AndroidRuntime(663): at dalvik.system.NativeStart.main(Native Method)
07-27 12:00:33.431: E/AndroidRuntime(663): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
07-27 12:00:33.431: E/AndroidRuntime(663): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.Activity.setContentView(Activity.java:1835)
07-27 12:00:33.431: E/AndroidRuntime(663): at com.myexample.fragmentsupportexample.MainFragmentActivity.onCreate(MainFragmentActivity.java:14)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.Activity.performCreate(Activity.java:4465)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
07-27 12:00:33.431: E/AndroidRuntime(663): ... 11 more
07-27 12:00:33.431: E/AndroidRuntime(663): Caused by: java.lang.ClassCastException: com.myexample.fragmentdemoexample.MyListFragment cannot be cast to android.support.v4.app.Fragment
07-27 12:00:33.431: E/AndroidRuntime(663): at android.support.v4.app.Fragment.instantiate(Fragment.java:388)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.support.v4.app.Fragment.instantiate(Fragment.java:363)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:264)
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669)
07-27 12:00:33.431: E/AndroidRuntime(663): ... 21 more
修改这里是我的全code
// MainActivity
EDIT Here is my full code //MainActivity
public class MainFragmentActivity extends FragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_fragment);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main_fragment, menu);
return true;
}
}
// DetailActivity
//DetailActivity
public class DetailActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Need to check if Activity has been switched to landscape mode
// If yes, finished and go back to the s tart Activity
if (getResources().getConfiguration().orientation ==
Configuration.ORIENTATION_LANDSCAPE) {
finish();
return;
}
setContentView(R.layout.details_activity_layout);
Bundle extras = getIntent().getExtras();
if (extras != null) {
String s = extras.getString("value");
TextView view = (TextView) findViewById(R.id.detailsText);
view.setText(s);
}
}
}
// MyListFragment
//MyListFragment
public class MyListFragment extends ListFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String[] values = new String[] { "Android", "iPhone", "WindowsMobile", "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X", "Linux",
"OS/2" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, values);
setListAdapter(adapter);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
String item = (String) getListAdapter().getItem(position);
DetailFragment fragment = (DetailFragment) (getActivity().getSupportFragmentManager()).findFragmentById(R.id.detailFragment);
if (fragment != null && fragment.isInLayout()) {
fragment.setText(item);
} else {
Intent intent = new Intent(getActivity().getApplicationContext(), DetailActivity.class);
intent.putExtra("value", item);
startActivity(intent);
}
}
}
// DetailsFragment
//DetailsFragment
public class DetailFragment extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.e("Test", "hello");
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.details, container, false);
return view;
}
public void setText(String item) {
TextView view = (TextView) getView().findViewById(R.id.detailsText);
view.setText(item);
}
}
//布局是
//activity_main.xml
//Layouts are //activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<fragment
android:id="@+id/listFragment"
android:layout_width="150dip"
android:layout_height="match_parent"
android:layout_marginTop="?android:attr/actionBarSize"
class="com.myexample.fragmentdemoexample.MyListFragment" >
</fragment>
<fragment
android:id="@+id/detailFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.myexample.fragmentdemoexample.DetailFragment" >
<!-- Preview: layout=@layout/details -->
</fragment>
</LinearLayout>
// details.xml
//details.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/detailsText"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_marginTop="20dip"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="30dip" />
</LinearLayout>
和code布局端口类似的Vogella的帖子用适当的修改
and code for layout-port is similar to as mentioned on Vogella's post with appropriate changes
推荐答案
您所有的code是好看，只是记住，你有两个xml文件activity_main.xml中之一将是在布局文件夹和第二会在布局端口的文件夹中。
All your code is look good , just keep in mind that you have two xml file activity_main.xml one will be in layout folder and second will be in layout-port folder.
有关Vogella的完整的工作演示看看这个链接项目。
For complete working demo of Vogella check out this link project.
http://www.sendspace.com/file/vdhx6w
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