在Android上使用ListFragment问题 [英] Problem using ListFragment on Android
问题描述
我在Android中的编程(我已经设定了广泛的PC应用程序和使用的Java)很新,我不知所措。我想创建一个使用碎片一个应用程序。我要创建的片段Programaticaly(引进Android开发者页面上说)买我的应用程序保持崩溃,我不知道,为什么。
下面是code为我的主要活动:
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.main); FragmentManager fmanager = getFragmentManager();
FragmentTransaction ftransaction = fmanager.beginTransaction();
FileBrowser fbrowser =新FileBrowser();
ftransaction.add(R.layout.main,fbrowserFileBrowser);
ftransaction.commit(); fbrowser.test();
}
这里是code为FileBrowser:
公共类FileBrowser扩展ListFragment {
公共无效测试(){
通信System.err.println(恩特雷里奥斯测试!!!);
的String [] = MYLIST {HOLA,世界报,德,拉斯维加斯,Listas};
如果(getActivity()== NULL){
通信System.err.println(我得到一个空活动);
}
其他{
通信System.err.println(无空活动试图创建一个适配器);
ArrayAdapter<串GT; AA =新ArrayAdapter<串GT;(getActivity(),R.layout.file_row,MYLIST);
}
// setListAdapter(新ArrayAdapter<串GT;(this.getActivity(),R.layout.file_row,MYLIST));
}
}
我只婉做的,开始是打印字符串列表MYLIST的片段。不过,我的程序崩溃,我得到这个错误:
19 06-09:25:42.920:ERROR / AndroidRuntime(26064):了java.lang.RuntimeException:无法启动活动ComponentInfo {com.ccr / com.ccr.Main}:java.lang.IllegalArgumentException异常:无景观发现编号为0x7f030001片段FileBrowser {4077d558#0 ID = 0x7f030001 FileBrowser}
感谢您的帮助!
PD:我得到了我得到一个空的活动消息还
。我已经试过了,它也不能工作。
这是我的新的XML文件
<?XML版本=1.0编码=UTF-8&GT?;
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:方向=垂直
机器人:layout_width =FILL_PARENT
机器人:layout_height =FILL_PARENT>
<的FrameLayout
机器人:layout_height =WRAP_CONTENT
机器人:layout_width =WRAP_CONTENT
机器人:ID =@ + ID / flFileBrowser>
< /&的FrameLayout GT;
< / LinearLayout中>
这是我的code读取:
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.main); FragmentManager fmanager = getFragmentManager();
FragmentTransaction ftransaction = fmanager.beginTransaction();
FileBrowser fbrowser =新FileBrowser();
通信System.err.println(我要补充片段);
ftransaction.add(R.id.flFileBrowser,fbrowserFileBrowser);
通信System.err.println(片段添加);
ftransaction.commit();
通信System.err.println(完成);
}
这是我的输出:
一十二月6日至10日:23:21.520:WARN / System.err的(30826):我对添加的片段
12月6日至一十日:23:21.520:WARN / System.err的(30826):添加片段
12月6日至一十日:23:21.520:WARN / System.err的(30826):已完成
12月6日至一十日:23:21.520:WARN / dalvikvm(30826):主题ID = 1:螺纹未捕获的异常(组= 0x40131760)退出
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):致命异常:主要
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):了java.lang.RuntimeException:无法启动活动ComponentInfo {com.ccr / com.ccr.Main}:java.lang.IllegalArgumentException异常:没有查看发现ID 0x7f050000的片段FileBrowser {4077d3f0#0 ID = 0x7f050000 FileBrowser}
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1748)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1764)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在android.app.ActivityThread.access $ 1500(ActivityThread.java:122)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1002)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在android.os.Handler.dispatchMessage(Handler.java:99)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在android.os.Looper.loop(Looper.java:132)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在android.app.ActivityThread.main(ActivityThread.java:4025)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在java.lang.reflect.Method.invokeNative(本机方法)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在java.lang.reflect.Method.invoke(Method.java:491)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:841)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):在dalvik.system.NativeStart.main(本机方法)
12月6日至一十日:23:21.520:ERROR / AndroidRuntime(30826):java.lang.IllegalArgumentException异常:产生的原因未找到ID为0x7f050000鉴于片段FileBrowser {4077d3f0#0 ID = 0x7f050000 FileBrowser}
该问题是在这里:
ftransaction.add(R.layout.main,fbrowser,FileBrowser);
的第一个参数是期望在活动的布局的视图present的一个id。您passsing的布局。因此,例如,假设你在活动的布局的id的FrameLayout =@ + ID /容器
那么你将拨打:
ftransaction.add(R.id.container,fbrowser,FileBrowser);
<一个href=\"http://developer.android.com/reference/android/app/FragmentTransaction.html#add%28int,%20android.app.Fragment,%20java.lang.String%29\">http://developer.android.com/reference/android/app/FragmentTransaction.html#add%28int,%20android.app.Fragment,%20java.lang.String%29
I'm very new at programming in Android (I have programmed extensively PC applications and used Java) and I'm at a loss. I want to create a application that uses fragments. I want to create the Fragment Programaticaly (as the introduction says on Android Developer page) buy my application keeps crashing and I have no Idea as to why.
Here is the code for my main activity:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
FragmentManager fmanager = getFragmentManager();
FragmentTransaction ftransaction = fmanager.beginTransaction();
FileBrowser fbrowser = new FileBrowser();
ftransaction.add(R.layout.main,fbrowser, "FileBrowser");
ftransaction.commit();
fbrowser.test();
}
And here is the code for FileBrowser:
public class FileBrowser extends ListFragment {
public void test(){
System.err.println("Entre a test!!!");
String[] MyList = {"HOla","Mundo","De","Las","Listas"};
if (getActivity() == null){
System.err.println("I get a NULL Activity");
}
else{
System.err.println("No NULL Activity Attempting to Create an Adapter");
ArrayAdapter<String> aa = new ArrayAdapter<String>(getActivity(), R.layout.file_row, MyList);
}
//setListAdapter(new ArrayAdapter<String>(this.getActivity(), R.layout.file_row, MyList));
}
}
All I wan to do to start is to print the string list MyList in the fragment. However I the program crashes and I get this error:
06-09 19:25:42.920: ERROR/AndroidRuntime(26064): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ccr/com.ccr.Main}: java.lang.IllegalArgumentException: No view found for id 0x7f030001 for fragment FileBrowser{4077d558 #0 id=0x7f030001 FileBrowser}
Thanks for any help!
PD: I get the I get a NULL Activity Message also.
I've tried that and it did not work either.
This is my new xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="@+id/flFileBrowser">
</FrameLayout>
</LinearLayout>
And this is what my code reads:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
FragmentManager fmanager = getFragmentManager();
FragmentTransaction ftransaction = fmanager.beginTransaction();
FileBrowser fbrowser = new FileBrowser();
System.err.println("I'm about to add the fragment");
ftransaction.add(R.id.flFileBrowser,fbrowser, "FileBrowser");
System.err.println("fragment added");
ftransaction.commit();
System.err.println("Done");
}
This was my output:
06-10 12:23:21.520: WARN/System.err(30826): I'm about to add the fragment
06-10 12:23:21.520: WARN/System.err(30826): fragment added
06-10 12:23:21.520: WARN/System.err(30826): Done
06-10 12:23:21.520: WARN/dalvikvm(30826): threadid=1: thread exiting with uncaught exception (group=0x40131760)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): FATAL EXCEPTION: main
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ccr/com.ccr.Main}: java.lang.IllegalArgumentException: No view found for id 0x7f050000 for fragment FileBrowser{4077d3f0 #0 id=0x7f050000 FileBrowser}
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1748)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1764)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at android.app.ActivityThread.access$1500(ActivityThread.java:122)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1002)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at android.os.Handler.dispatchMessage(Handler.java:99)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at android.os.Looper.loop(Looper.java:132)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at android.app.ActivityThread.main(ActivityThread.java:4025)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at java.lang.reflect.Method.invokeNative(Native Method)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at java.lang.reflect.Method.invoke(Method.java:491)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): at dalvik.system.NativeStart.main(Native Method)
06-10 12:23:21.520: ERROR/AndroidRuntime(30826): Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f050000 for fragment FileBrowser{4077d3f0 #0 id=0x7f050000 FileBrowser}
The problem is here:
ftransaction.add(R.layout.main,fbrowser, "FileBrowser");
The first parameter is expecting an id of a view present in the layout of the activity. You are passsing a layout. So for example let's say you have a FrameLayout in the layout of the activity with id="@+id/container"
then you would call:
ftransaction.add(R.id.container,fbrowser, "FileBrowser");
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