问题
Custom xml file to view
This is an error produced from the above question
I managed to get the XML file saved into the assets folder, and loaded (and I can even navigate through the different parts of the parser and produce outputs from them) but when I try to pass the XmlPullParser to LayoutInflater I get the above error. I am not totally sure why it is happening though.
Below is the activity that I am using (the part of it that involves parsing the Xml file) as well as the xml file (called activity_main.sv) and the logcat.
Ignore the file extension of the xml file. I simply renamed it because the IDE was having fits about inclusion. If the xml file is saved in the res/layouts folder it works just fine (I know because I copied it directly out of the res/layouts folder).
public void onCreate(Bundle savedInstanceState){
...
try {
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
XmlPullParser parser = factory.newPullParser();
InputStream in = getResources().getAssets().open("views/activity_main.sv");
parser.setInput(new InputStreamReader(in));
LayoutInflater inflate = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// The below line is line 73, the line which is giving me issue
View view = inflate.inflate(parser, null);
setContentView(view);
}catch(Exception e){
e.printStackTrace();
// Consider the below line Log.d("TAG","Well fuck me it didnt work"). AppLog is a custom class I created to help manage logging.
AppLog.log("Well fuck me it didnt work");
}
}
And my basic relativelayout saved as "activity_main.sv"
<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
And finally the logcat output
10-24 19:36:55.273: W/EGL_emulation(4724): eglSurfaceAttrib not implemented
10-24 19:36:55.273: W/OpenGLRenderer(4724): Failed to set EGL_SWAP_BEHAVIOR on surface 0xa34192a0, error=EGL_SUCCESS
10-24 19:47:15.252: W/System.err(8074): java.lang.ClassCastException: android.util.XmlPullAttributes cannot be cast to
android.content.res.XmlBlock$Parser
10-24 19:47:15.253: W/System.err(8074): at android.content.res.Resources$Theme.obtainStyledAttributes
(Resources.java:1483)
10-24 19:47:15.253: W/System.err(8074): at android.content.Context.obtainStyledAttributes(Context.java:460)
10-24 19:47:15.253: W/System.err(8074): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:708)
10-24 19:47:15.253: W/System.err(8074): at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
10-24 19:47:15.253: W/System.err(8074): at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
10-24 19:47:15.253: W/System.err(8074): at pro.bladebeat.intentplayground.MainActivity.onCreate
(MainActivity.java:73)
10-24 19:47:15.253: W/System.err(8074): at android.app.Activity.performCreate(Activity.java:5933)
10-24 19:47:15.253: W/System.err(8074): at android.app.Instrumentation.callActivityOnCreate
(Instrumentation.java:1105)
10-24 19:47:15.253: W/System.err(8074): at android.app.ActivityThread.performLaunchActivity
(ActivityThread.java:2251)
10-24 19:47:15.253: W/System.err(8074): at android.app.ActivityThread.handleLaunchActivity
(ActivityThread.java:2360)
10-24 19:47:15.253: W/System.err(8074): at android.app.ActivityThread.access$800(ActivityThread.java:144)
10-24 19:47:15.253: W/System.err(8074): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
10-24 19:47:15.253: W/System.err(8074): at android.os.Handler.dispatchMessage(Handler.java:102)
10-24 19:47:15.253: W/System.err(8074): at android.os.Looper.loop(Looper.java:135)
10-24 19:47:15.253: W/System.err(8074): at android.app.ActivityThread.main(ActivityThread.java:5221)
10-24 19:47:15.253: W/System.err(8074): at java.lang.reflect.Method.invoke(Native Method)
10-24 19:47:15.253: W/System.err(8074): at java.lang.reflect.Method.invoke(Method.java:372)
10-24 19:47:15.253: W/System.err(8074): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:899)
10-24 19:47:15.253: W/System.err(8074): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
10-24 19:47:15.257: D/AppLog(8074): Well fuck me it didnt work
EDIT After adding the factory.setValidating(true) statement. I have a different error now.
11-04 14:59:52.682: W/System.err(4664): org.xmlpull.v1.XmlPullParserException: unsupported feature: http://xmlpull.org/v1/doc/features.html#validation (position:START_DOCUMENT null@1:1)
11-04 14:59:52.684: W/System.err(4664): at org.kxml2.io.KXmlParser.setFeature(KXmlParser.java:2100)
11-04 14:59:52.684: W/System.err(4664): at org.xmlpull.v1.XmlPullParserFactory.newPullParser(XmlPullParserFactory.java:135)
11-04 14:59:52.684: W/System.err(4664): at pro.bladebeat.intentplayground.MainActivity.onCreate(MainActivity.java:36)
11-04 14:59:52.684: W/System.err(4664): at android.app.Activity.performCreate(Activity.java:5933)
11-04 14:59:52.684: W/System.err(4664): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
11-04 14:59:52.684: W/System.err(4664): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
11-04 14:59:52.684: W/System.err(4664): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
11-04 14:59:52.684: W/System.err(4664): at android.app.ActivityThread.access$800(ActivityThread.java:144)
11-04 14:59:52.684: W/System.err(4664): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
11-04 14:59:52.684: W/System.err(4664): at android.os.Handler.dispatchMessage(Handler.java:102)
11-04 14:59:52.684: W/System.err(4664): at android.os.Looper.loop(Looper.java:135)
11-04 14:59:52.684: W/System.err(4664): at android.app.ActivityThread.main(ActivityThread.java:5221)
11-04 14:59:52.684: W/System.err(4664): at java.lang.reflect.Method.invoke(Native Method)
11-04 14:59:52.684: W/System.err(4664): at java.lang.reflect.Method.invoke(Method.java:372)
11-04 14:59:52.684: W/System.err(4664): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
11-04 14:59:52.684: W/System.err(4664): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
回答1:
put after factory
factory.setValidating(true);
回答2:
I know it is an old question but I want to give an answer for those who want to use this method or faced with the problem recently.
I studied android source code about five hours. XmlBlock is a private class and XmlBlock.Parser is inside it so can be accessed only by classes in android.content.res. If you use this method with a xml got from method Resources.getXml(id) it will work without any problem(!) because getXml calls a function that creates a XmlBlock.Parser with its special algorithm designed for application internal resources. So DON'T WASTE your time to get it worked (XmlResourceParser or anything like that cannot be cast to XmlBlock.Parser)
回答3:
Doc LayoutInflate
look this:
Important For performance reasons, view inflation relies heavily on pre-processing of XML files that is done at build time. Therefore, it is not currently possible to use LayoutInflater with an XmlPullParser over a plain XML file at runtime.
来源：https://stackoverflow.com/questions/33331935/xmlpullattributes-cannot-be-cast-to-xmlblockparser