Android的ListFragment是混乱 [英] Android ListFragment is to confusing
本文介绍了Android的ListFragment是混乱的处理方法，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
我很困惑使用ListFragment ......我不能明白问题出在哪里？
I'm so confused using ListFragment... I cant understand where is the problem...
下面是我的FragmentActivity类：
Here is my FragmentActivity class:
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class menu extends FragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.root_menu);
if (getSupportFragmentManager().findFragmentById(android.R.id.content) == null) {
ListFrag list = new ListFrag();
getSupportFragmentManager().beginTransaction().replace(android.R.id.content, list).commit();
}}}
我的ListFragment类：
My ListFragment class:
public class ListFrag extends ListFragment {
int Files = 0;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
getListView().setBackgroundResource(R.drawable.table);
getListView().setDividerHeight(0);
getListView().setCacheColorHint(0);
View view = inflater.inflate(R.layout.main, null);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setListAdapter(new CustomListAdapter(getActivity(), getThemes()));
}
public String[] getThemes(){
...
return ...;
}
此外main.xml中（它是用于制造列表，自定义列表适配器我做了）：
Also main.xml (it's used for making list with custom list adapter i made):
<?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="wrap_content"
android:paddingLeft="40dp"
android:paddingTop="30dp"
android:cacheColorHint="#00000000"
android:layout_marginTop="100px"
>
<ImageView
android:id="@+id/icon"
android:layout_height="40dp"
android:layout_width="40dp"
android:src="@drawable/check" >
</ImageView>
<TextView
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@+id/label"
android:paddingTop="6dp"
android:paddingLeft="20dp"
android:textSize="25px" >
</TextView>
</LinearLayout>
这root_menu.xml应显示在顶部的背景图像和列表的片段：
This root_menu.xml should show an background image and list fragment on the top:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/back"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/back"
android:cacheColorHint="#00000000"
>
<fragment
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.osmgames.kartuves.ListFrag" >
</fragment>
</LinearLayout>
这是我CustomListAdapter类：
This is my CustomListAdapter class:
public class CustomListAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
public CustomListAdapter(Context context, String[] values) {
super(context, R.layout.main, values);
this.context = context;
this.values = values;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.main, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.label);
ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
textView.setText(values[position]);
imageView.setImageResource(R.drawable.check);
return rowView;
}
}
日志：
05-07 11:49:43.017: D/AndroidRuntime(1216): Shutting down VM
05-07 11:49:43.017: W/dalvikvm(1216): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-07 11:49:43.047: E/AndroidRuntime(1216): FATAL EXCEPTION: main
05-07 11:49:43.047: E/AndroidRuntime(1216): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.osmgames.kartuves/com.osmgames.kartuves.menu}: android.view.InflateException: Binary XML file line #11: Error inflating class fragment
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.os.Handler.dispatchMessage(Handler.java:99)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.os.Looper.loop(Looper.java:123)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-07 11:49:43.047: E/AndroidRuntime(1216): at java.lang.reflect.Method.invokeNative(Native Method)
05-07 11:49:43.047: E/AndroidRuntime(1216): at java.lang.reflect.Method.invoke(Method.java:521)
05-07 11:49:43.047: E/AndroidRuntime(1216): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-07 11:49:43.047: E/AndroidRuntime(1216): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-07 11:49:43.047: E/AndroidRuntime(1216): at dalvik.system.NativeStart.main(Native Method)
05-07 11:49:43.047: E/AndroidRuntime(1216): Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class fragment
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:582)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
05-07 11:49:43.047: E/AndroidRuntime(1216): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.Activity.setContentView(Activity.java:1647)
05-07 11:49:43.047: E/AndroidRuntime(1216): at com.osmgames.kartuves.menu.onCreate(menu.java:12)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
05-07 11:49:43.047: E/AndroidRuntime(1216): ... 11 more
05-07 11:49:43.047: E/AndroidRuntime(1216): Caused by: java.lang.IllegalStateException: Content view not yet created
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.support.v4.app.ListFragment.ensureList(ListFragment.java:328)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.support.v4.app.ListFragment.getListView(ListFragment.java:222)
05-07 11:49:43.047: E/AndroidRuntime(1216): at com.osmgames.kartuves.ListFrag.onCreateView(ListFrag.java:22)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:845)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1058)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1156)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:270)
05-07 11:49:43.047: E/AndroidRuntime(1216): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:558)
05-07 11:49:43.047: E/AndroidRuntime(1216): ... 20 more
我看到它说，不创建内容查看，但我不明白为什么...
I see it says that contentview is not created but i dont understand why...
推荐答案
那么，从logcat的：
Well, from the logcat:
Caused by: java.lang.IllegalStateException: Content view not yet created
您的问题就在这里：
getListView().setBackgroundResource(R.drawable.table);
getListView().setDividerHeight(0);
getListView().setCacheColorHint(0);
View view = inflater.inflate(R.layout.main, null);
您正在尝试，然后再设置内容视图来获取列表视图。移动视图通胀的getListView之前。
You are trying to get the listview before you set the content view. Move the view inflation to before the getListView.
我相信这也将解决有关充气类片段的第二个错误。
I believe this will also fix the second error about inflating the class fragment.
这篇关于Android的ListFragment是混乱的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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