751 lines
30 KiB
Java
751 lines
30 KiB
Java
/*
|
|
* Copyright (C) 2007 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package android.view;
|
|
|
|
import android.content.Context;
|
|
import android.content.res.TypedArray;
|
|
import android.content.res.XmlResourceParser;
|
|
import android.util.AttributeSet;
|
|
import android.util.Xml;
|
|
|
|
import org.xmlpull.v1.XmlPullParser;
|
|
import org.xmlpull.v1.XmlPullParserException;
|
|
|
|
import java.io.IOException;
|
|
import java.lang.reflect.Constructor;
|
|
import java.util.HashMap;
|
|
|
|
/**
|
|
* This class is used to instantiate layout XML file into its corresponding View
|
|
* objects. It is never be used directly -- use
|
|
* {@link android.app.Activity#getLayoutInflater()} or
|
|
* {@link Context#getSystemService} to retrieve a standard LayoutInflater instance
|
|
* that is already hooked up to the current context and correctly configured
|
|
* for the device you are running on. For example:
|
|
*
|
|
* <pre>LayoutInflater inflater = (LayoutInflater)context.getSystemService
|
|
* Context.LAYOUT_INFLATER_SERVICE);</pre>
|
|
*
|
|
* <p>
|
|
* To create a new LayoutInflater with an additional {@link Factory} for your
|
|
* own views, you can use {@link #cloneInContext} to clone an existing
|
|
* ViewFactory, and then call {@link #setFactory} on it to include your
|
|
* Factory.
|
|
*
|
|
* <p>
|
|
* 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;
|
|
* it only works with an XmlPullParser returned from a compiled resource
|
|
* (R.<em>something</em> file.)
|
|
*
|
|
* @see Context#getSystemService
|
|
*/
|
|
public abstract class LayoutInflater {
|
|
private final boolean DEBUG = false;
|
|
|
|
/**
|
|
* This field should be made private, so it is hidden from the SDK.
|
|
* {@hide}
|
|
*/
|
|
protected final Context mContext;
|
|
|
|
// these are optional, set by the caller
|
|
private boolean mFactorySet;
|
|
private Factory mFactory;
|
|
private Filter mFilter;
|
|
|
|
private final Object[] mConstructorArgs = new Object[2];
|
|
|
|
private static final Class[] mConstructorSignature = new Class[] {
|
|
Context.class, AttributeSet.class};
|
|
|
|
private static final HashMap<String, Constructor> sConstructorMap =
|
|
new HashMap<String, Constructor>();
|
|
|
|
private HashMap<String, Boolean> mFilterMap;
|
|
|
|
private static final String TAG_MERGE = "merge";
|
|
private static final String TAG_INCLUDE = "include";
|
|
private static final String TAG_REQUEST_FOCUS = "requestFocus";
|
|
|
|
/**
|
|
* Hook to allow clients of the LayoutInflater to restrict the set of Views that are allowed
|
|
* to be inflated.
|
|
*
|
|
*/
|
|
public interface Filter {
|
|
/**
|
|
* Hook to allow clients of the LayoutInflater to restrict the set of Views
|
|
* that are allowed to be inflated.
|
|
*
|
|
* @param clazz The class object for the View that is about to be inflated
|
|
*
|
|
* @return True if this class is allowed to be inflated, or false otherwise
|
|
*/
|
|
boolean onLoadClass(Class clazz);
|
|
}
|
|
|
|
public interface Factory {
|
|
/**
|
|
* Hook you can supply that is called when inflating from a LayoutInflater.
|
|
* You can use this to customize the tag names available in your XML
|
|
* layout files.
|
|
*
|
|
* <p>
|
|
* Note that it is good practice to prefix these custom names with your
|
|
* package (i.e., com.coolcompany.apps) to avoid conflicts with system
|
|
* names.
|
|
*
|
|
* @param name Tag name to be inflated.
|
|
* @param context The context the view is being created in.
|
|
* @param attrs Inflation attributes as specified in XML file.
|
|
*
|
|
* @return View Newly created view. Return null for the default
|
|
* behavior.
|
|
*/
|
|
public View onCreateView(String name, Context context, AttributeSet attrs);
|
|
}
|
|
|
|
private static class FactoryMerger implements Factory {
|
|
private final Factory mF1, mF2;
|
|
|
|
FactoryMerger(Factory f1, Factory f2) {
|
|
mF1 = f1;
|
|
mF2 = f2;
|
|
}
|
|
|
|
public View onCreateView(String name, Context context, AttributeSet attrs) {
|
|
View v = mF1.onCreateView(name, context, attrs);
|
|
if (v != null) return v;
|
|
return mF2.onCreateView(name, context, attrs);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a new LayoutInflater instance associated with a particular Context.
|
|
* Applications will almost always want to use
|
|
* {@link Context#getSystemService Context.getSystemService()} to retrieve
|
|
* the standard {@link Context#LAYOUT_INFLATER_SERVICE Context.INFLATER_SERVICE}.
|
|
*
|
|
* @param context The Context in which this LayoutInflater will create its
|
|
* Views; most importantly, this supplies the theme from which the default
|
|
* values for their attributes are retrieved.
|
|
*/
|
|
protected LayoutInflater(Context context) {
|
|
mContext = context;
|
|
}
|
|
|
|
/**
|
|
* Create a new LayoutInflater instance that is a copy of an existing
|
|
* LayoutInflater, optionally with its Context changed. For use in
|
|
* implementing {@link #cloneInContext}.
|
|
*
|
|
* @param original The original LayoutInflater to copy.
|
|
* @param newContext The new Context to use.
|
|
*/
|
|
protected LayoutInflater(LayoutInflater original, Context newContext) {
|
|
mContext = newContext;
|
|
mFactory = original.mFactory;
|
|
mFilter = original.mFilter;
|
|
}
|
|
|
|
/**
|
|
* Obtains the LayoutInflater from the given context.
|
|
*/
|
|
public static LayoutInflater from(Context context) {
|
|
LayoutInflater LayoutInflater =
|
|
(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
|
|
if (LayoutInflater == null) {
|
|
throw new AssertionError("LayoutInflater not found.");
|
|
}
|
|
return LayoutInflater;
|
|
}
|
|
|
|
/**
|
|
* Create a copy of the existing LayoutInflater object, with the copy
|
|
* pointing to a different Context than the original. This is used by
|
|
* {@link ContextThemeWrapper} to create a new LayoutInflater to go along
|
|
* with the new Context theme.
|
|
*
|
|
* @param newContext The new Context to associate with the new LayoutInflater.
|
|
* May be the same as the original Context if desired.
|
|
*
|
|
* @return Returns a brand spanking new LayoutInflater object associated with
|
|
* the given Context.
|
|
*/
|
|
public abstract LayoutInflater cloneInContext(Context newContext);
|
|
|
|
/**
|
|
* Return the context we are running in, for access to resources, class
|
|
* loader, etc.
|
|
*/
|
|
public Context getContext() {
|
|
return mContext;
|
|
}
|
|
|
|
/**
|
|
* Return the current factory (or null). This is called on each element
|
|
* name. If the factory returns a View, add that to the hierarchy. If it
|
|
* returns null, proceed to call onCreateView(name).
|
|
*/
|
|
public final Factory getFactory() {
|
|
return mFactory;
|
|
}
|
|
|
|
/**
|
|
* Attach a custom Factory interface for creating views while using
|
|
* this LayoutInflater. This must not be null, and can only be set once;
|
|
* after setting, you can not change the factory. This is
|
|
* called on each element name as the xml is parsed. If the factory returns
|
|
* a View, that is added to the hierarchy. If it returns null, the next
|
|
* factory default {@link #onCreateView} method is called.
|
|
*
|
|
* <p>If you have an existing
|
|
* LayoutInflater and want to add your own factory to it, use
|
|
* {@link #cloneInContext} to clone the existing instance and then you
|
|
* can use this function (once) on the returned new instance. This will
|
|
* merge your own factory with whatever factory the original instance is
|
|
* using.
|
|
*/
|
|
public void setFactory(Factory factory) {
|
|
if (mFactorySet) {
|
|
throw new IllegalStateException("A factory has already been set on this LayoutInflater");
|
|
}
|
|
if (factory == null) {
|
|
throw new NullPointerException("Given factory can not be null");
|
|
}
|
|
mFactorySet = true;
|
|
if (mFactory == null) {
|
|
mFactory = factory;
|
|
} else {
|
|
mFactory = new FactoryMerger(factory, mFactory);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return The {@link Filter} currently used by this LayoutInflater to restrict the set of Views
|
|
* that are allowed to be inflated.
|
|
*/
|
|
public Filter getFilter() {
|
|
return mFilter;
|
|
}
|
|
|
|
/**
|
|
* Sets the {@link Filter} to by this LayoutInflater. If a view is attempted to be inflated
|
|
* which is not allowed by the {@link Filter}, the {@link #inflate(int, ViewGroup)} call will
|
|
* throw an {@link InflateException}. This filter will replace any previous filter set on this
|
|
* LayoutInflater.
|
|
*
|
|
* @param filter The Filter which restricts the set of Views that are allowed to be inflated.
|
|
* This filter will replace any previous filter set on this LayoutInflater.
|
|
*/
|
|
public void setFilter(Filter filter) {
|
|
mFilter = filter;
|
|
if (filter != null) {
|
|
mFilterMap = new HashMap<String, Boolean>();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Inflate a new view hierarchy from the specified xml resource. Throws
|
|
* {@link InflateException} if there is an error.
|
|
*
|
|
* @param resource ID for an XML layout resource to load (e.g.,
|
|
* <code>R.layout.main_page</code>)
|
|
* @param root Optional view to be the parent of the generated hierarchy.
|
|
* @return The root View of the inflated hierarchy. If root was supplied,
|
|
* this is the root View; otherwise it is the root of the inflated
|
|
* XML file.
|
|
*/
|
|
public View inflate(int resource, ViewGroup root) {
|
|
return inflate(resource, root, root != null);
|
|
}
|
|
|
|
/**
|
|
* Inflate a new view hierarchy from the specified xml node. Throws
|
|
* {@link InflateException} if there is an error. *
|
|
* <p>
|
|
* <em><strong>Important</strong></em> 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.
|
|
*
|
|
* @param parser XML dom node containing the description of the view
|
|
* hierarchy.
|
|
* @param root Optional view to be the parent of the generated hierarchy.
|
|
* @return The root View of the inflated hierarchy. If root was supplied,
|
|
* this is the root View; otherwise it is the root of the inflated
|
|
* XML file.
|
|
*/
|
|
public View inflate(XmlPullParser parser, ViewGroup root) {
|
|
return inflate(parser, root, root != null);
|
|
}
|
|
|
|
/**
|
|
* Inflate a new view hierarchy from the specified xml resource. Throws
|
|
* {@link InflateException} if there is an error.
|
|
*
|
|
* @param resource ID for an XML layout resource to load (e.g.,
|
|
* <code>R.layout.main_page</code>)
|
|
* @param root Optional view to be the parent of the generated hierarchy (if
|
|
* <em>attachToRoot</em> is true), or else simply an object that
|
|
* provides a set of LayoutParams values for root of the returned
|
|
* hierarchy (if <em>attachToRoot</em> is false.)
|
|
* @param attachToRoot Whether the inflated hierarchy should be attached to
|
|
* the root parameter? If false, root is only used to create the
|
|
* correct subclass of LayoutParams for the root view in the XML.
|
|
* @return The root View of the inflated hierarchy. If root was supplied and
|
|
* attachToRoot is true, this is root; otherwise it is the root of
|
|
* the inflated XML file.
|
|
*/
|
|
public View inflate(int resource, ViewGroup root, boolean attachToRoot) {
|
|
if (DEBUG) System.out.println("INFLATING from resource: " + resource);
|
|
XmlResourceParser parser = getContext().getResources().getLayout(resource);
|
|
try {
|
|
return inflate(parser, root, attachToRoot);
|
|
} finally {
|
|
parser.close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Inflate a new view hierarchy from the specified XML node. Throws
|
|
* {@link InflateException} if there is an error.
|
|
* <p>
|
|
* <em><strong>Important</strong></em> 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.
|
|
*
|
|
* @param parser XML dom node containing the description of the view
|
|
* hierarchy.
|
|
* @param root Optional view to be the parent of the generated hierarchy (if
|
|
* <em>attachToRoot</em> is true), or else simply an object that
|
|
* provides a set of LayoutParams values for root of the returned
|
|
* hierarchy (if <em>attachToRoot</em> is false.)
|
|
* @param attachToRoot Whether the inflated hierarchy should be attached to
|
|
* the root parameter? If false, root is only used to create the
|
|
* correct subclass of LayoutParams for the root view in the XML.
|
|
* @return The root View of the inflated hierarchy. If root was supplied and
|
|
* attachToRoot is true, this is root; otherwise it is the root of
|
|
* the inflated XML file.
|
|
*/
|
|
public View inflate(XmlPullParser parser, ViewGroup root, boolean attachToRoot) {
|
|
synchronized (mConstructorArgs) {
|
|
final AttributeSet attrs = Xml.asAttributeSet(parser);
|
|
Context lastContext = (Context)mConstructorArgs[0];
|
|
mConstructorArgs[0] = mContext;
|
|
View result = root;
|
|
|
|
try {
|
|
// Look for the root node.
|
|
int type;
|
|
while ((type = parser.next()) != XmlPullParser.START_TAG &&
|
|
type != XmlPullParser.END_DOCUMENT) {
|
|
// Empty
|
|
}
|
|
|
|
if (type != XmlPullParser.START_TAG) {
|
|
throw new InflateException(parser.getPositionDescription()
|
|
+ ": No start tag found!");
|
|
}
|
|
|
|
final String name = parser.getName();
|
|
|
|
if (DEBUG) {
|
|
System.out.println("**************************");
|
|
System.out.println("Creating root view: "
|
|
+ name);
|
|
System.out.println("**************************");
|
|
}
|
|
|
|
if (TAG_MERGE.equals(name)) {
|
|
if (root == null || !attachToRoot) {
|
|
throw new InflateException("<merge /> can be used only with a valid "
|
|
+ "ViewGroup root and attachToRoot=true");
|
|
}
|
|
|
|
rInflate(parser, root, attrs);
|
|
} else {
|
|
// Temp is the root view that was found in the xml
|
|
View temp = createViewFromTag(name, attrs);
|
|
|
|
ViewGroup.LayoutParams params = null;
|
|
|
|
if (root != null) {
|
|
if (DEBUG) {
|
|
System.out.println("Creating params from root: " +
|
|
root);
|
|
}
|
|
// Create layout params that match root, if supplied
|
|
params = root.generateLayoutParams(attrs);
|
|
if (!attachToRoot) {
|
|
// Set the layout params for temp if we are not
|
|
// attaching. (If we are, we use addView, below)
|
|
temp.setLayoutParams(params);
|
|
}
|
|
}
|
|
|
|
if (DEBUG) {
|
|
System.out.println("-----> start inflating children");
|
|
}
|
|
// Inflate all children under temp
|
|
rInflate(parser, temp, attrs);
|
|
if (DEBUG) {
|
|
System.out.println("-----> done inflating children");
|
|
}
|
|
|
|
// We are supposed to attach all the views we found (int temp)
|
|
// to root. Do that now.
|
|
if (root != null && attachToRoot) {
|
|
root.addView(temp, params);
|
|
}
|
|
|
|
// Decide whether to return the root that was passed in or the
|
|
// top view found in xml.
|
|
if (root == null || !attachToRoot) {
|
|
result = temp;
|
|
}
|
|
}
|
|
|
|
} catch (XmlPullParserException e) {
|
|
InflateException ex = new InflateException(e.getMessage());
|
|
ex.initCause(e);
|
|
throw ex;
|
|
} catch (IOException e) {
|
|
InflateException ex = new InflateException(
|
|
parser.getPositionDescription()
|
|
+ ": " + e.getMessage());
|
|
ex.initCause(e);
|
|
throw ex;
|
|
} finally {
|
|
// Don't retain static reference on context.
|
|
mConstructorArgs[0] = lastContext;
|
|
mConstructorArgs[1] = null;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Low-level function for instantiating a view by name. This attempts to
|
|
* instantiate a view class of the given <var>name</var> found in this
|
|
* LayoutInflater's ClassLoader.
|
|
*
|
|
* <p>
|
|
* There are two things that can happen in an error case: either the
|
|
* exception describing the error will be thrown, or a null will be
|
|
* returned. You must deal with both possibilities -- the former will happen
|
|
* the first time createView() is called for a class of a particular name,
|
|
* the latter every time there-after for that class name.
|
|
*
|
|
* @param name The full name of the class to be instantiated.
|
|
* @param attrs The XML attributes supplied for this instance.
|
|
*
|
|
* @return View The newly instantied view, or null.
|
|
*/
|
|
public final View createView(String name, String prefix, AttributeSet attrs)
|
|
throws ClassNotFoundException, InflateException {
|
|
Constructor constructor = sConstructorMap.get(name);
|
|
Class clazz = null;
|
|
|
|
try {
|
|
if (constructor == null) {
|
|
// Class not found in the cache, see if it's real, and try to add it
|
|
clazz = mContext.getClassLoader().loadClass(
|
|
prefix != null ? (prefix + name) : name);
|
|
|
|
if (mFilter != null && clazz != null) {
|
|
boolean allowed = mFilter.onLoadClass(clazz);
|
|
if (!allowed) {
|
|
failNotAllowed(name, prefix, attrs);
|
|
}
|
|
}
|
|
constructor = clazz.getConstructor(mConstructorSignature);
|
|
sConstructorMap.put(name, constructor);
|
|
} else {
|
|
// If we have a filter, apply it to cached constructor
|
|
if (mFilter != null) {
|
|
// Have we seen this name before?
|
|
Boolean allowedState = mFilterMap.get(name);
|
|
if (allowedState == null) {
|
|
// New class -- remember whether it is allowed
|
|
clazz = mContext.getClassLoader().loadClass(
|
|
prefix != null ? (prefix + name) : name);
|
|
|
|
boolean allowed = clazz != null && mFilter.onLoadClass(clazz);
|
|
mFilterMap.put(name, allowed);
|
|
if (!allowed) {
|
|
failNotAllowed(name, prefix, attrs);
|
|
}
|
|
} else if (allowedState.equals(Boolean.FALSE)) {
|
|
failNotAllowed(name, prefix, attrs);
|
|
}
|
|
}
|
|
}
|
|
|
|
Object[] args = mConstructorArgs;
|
|
args[1] = attrs;
|
|
return (View) constructor.newInstance(args);
|
|
|
|
} catch (NoSuchMethodException e) {
|
|
InflateException ie = new InflateException(attrs.getPositionDescription()
|
|
+ ": Error inflating class "
|
|
+ (prefix != null ? (prefix + name) : name));
|
|
ie.initCause(e);
|
|
throw ie;
|
|
|
|
} catch (ClassNotFoundException e) {
|
|
// If loadClass fails, we should propagate the exception.
|
|
throw e;
|
|
} catch (Exception e) {
|
|
InflateException ie = new InflateException(attrs.getPositionDescription()
|
|
+ ": Error inflating class "
|
|
+ (clazz == null ? "<unknown>" : clazz.getName()));
|
|
ie.initCause(e);
|
|
throw ie;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Throw an excpetion because the specified class is not allowed to be inflated.
|
|
*/
|
|
private void failNotAllowed(String name, String prefix, AttributeSet attrs) {
|
|
InflateException ie = new InflateException(attrs.getPositionDescription()
|
|
+ ": Class not allowed to be inflated "
|
|
+ (prefix != null ? (prefix + name) : name));
|
|
throw ie;
|
|
}
|
|
|
|
/**
|
|
* This routine is responsible for creating the correct subclass of View
|
|
* given the xml element name. Override it to handle custom view objects. If
|
|
* you override this in your subclass be sure to call through to
|
|
* super.onCreateView(name) for names you do not recognize.
|
|
*
|
|
* @param name The fully qualified class name of the View to be create.
|
|
* @param attrs An AttributeSet of attributes to apply to the View.
|
|
*
|
|
* @return View The View created.
|
|
*/
|
|
protected View onCreateView(String name, AttributeSet attrs)
|
|
throws ClassNotFoundException {
|
|
return createView(name, "android.view.", attrs);
|
|
}
|
|
|
|
/*
|
|
* default visibility so the BridgeInflater can override it.
|
|
*/
|
|
View createViewFromTag(String name, AttributeSet attrs) {
|
|
if (name.equals("view")) {
|
|
name = attrs.getAttributeValue(null, "class");
|
|
}
|
|
|
|
if (DEBUG) System.out.println("******** Creating view: " + name);
|
|
|
|
try {
|
|
View view = (mFactory == null) ? null : mFactory.onCreateView(name,
|
|
mContext, attrs);
|
|
|
|
if (view == null) {
|
|
if (-1 == name.indexOf('.')) {
|
|
view = onCreateView(name, attrs);
|
|
} else {
|
|
view = createView(name, null, attrs);
|
|
}
|
|
}
|
|
|
|
if (DEBUG) System.out.println("Created view is: " + view);
|
|
return view;
|
|
|
|
} catch (InflateException e) {
|
|
throw e;
|
|
|
|
} catch (ClassNotFoundException e) {
|
|
InflateException ie = new InflateException(attrs.getPositionDescription()
|
|
+ ": Error inflating class " + name);
|
|
ie.initCause(e);
|
|
throw ie;
|
|
|
|
} catch (Exception e) {
|
|
InflateException ie = new InflateException(attrs.getPositionDescription()
|
|
+ ": Error inflating class " + name);
|
|
ie.initCause(e);
|
|
throw ie;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Recursive method used to descend down the xml hierarchy and instantiate
|
|
* views, instantiate their children, and then call onFinishInflate().
|
|
*/
|
|
private void rInflate(XmlPullParser parser, View parent, final AttributeSet attrs)
|
|
throws XmlPullParserException, IOException {
|
|
|
|
final int depth = parser.getDepth();
|
|
int type;
|
|
|
|
while (((type = parser.next()) != XmlPullParser.END_TAG ||
|
|
parser.getDepth() > depth) && type != XmlPullParser.END_DOCUMENT) {
|
|
|
|
if (type != XmlPullParser.START_TAG) {
|
|
continue;
|
|
}
|
|
|
|
final String name = parser.getName();
|
|
|
|
if (TAG_REQUEST_FOCUS.equals(name)) {
|
|
parseRequestFocus(parser, parent);
|
|
} else if (TAG_INCLUDE.equals(name)) {
|
|
if (parser.getDepth() == 0) {
|
|
throw new InflateException("<include /> cannot be the root element");
|
|
}
|
|
parseInclude(parser, parent, attrs);
|
|
} else if (TAG_MERGE.equals(name)) {
|
|
throw new InflateException("<merge /> must be the root element");
|
|
} else {
|
|
final View view = createViewFromTag(name, attrs);
|
|
final ViewGroup viewGroup = (ViewGroup) parent;
|
|
final ViewGroup.LayoutParams params = viewGroup.generateLayoutParams(attrs);
|
|
rInflate(parser, view, attrs);
|
|
viewGroup.addView(view, params);
|
|
}
|
|
}
|
|
|
|
parent.onFinishInflate();
|
|
}
|
|
|
|
private void parseRequestFocus(XmlPullParser parser, View parent)
|
|
throws XmlPullParserException, IOException {
|
|
int type;
|
|
parent.requestFocus();
|
|
final int currentDepth = parser.getDepth();
|
|
while (((type = parser.next()) != XmlPullParser.END_TAG ||
|
|
parser.getDepth() > currentDepth) && type != XmlPullParser.END_DOCUMENT) {
|
|
// Empty
|
|
}
|
|
}
|
|
|
|
private void parseInclude(XmlPullParser parser, View parent, AttributeSet attrs)
|
|
throws XmlPullParserException, IOException {
|
|
|
|
int type;
|
|
|
|
if (parent instanceof ViewGroup) {
|
|
final int layout = attrs.getAttributeResourceValue(null, "layout", 0);
|
|
if (layout == 0) {
|
|
final String value = attrs.getAttributeValue(null, "layout");
|
|
if (value == null) {
|
|
throw new InflateException("You must specifiy a layout in the"
|
|
+ " include tag: <include layout=\"@layout/layoutID\" />");
|
|
} else {
|
|
throw new InflateException("You must specifiy a valid layout "
|
|
+ "reference. The layout ID " + value + " is not valid.");
|
|
}
|
|
} else {
|
|
final XmlResourceParser childParser =
|
|
getContext().getResources().getLayout(layout);
|
|
|
|
try {
|
|
final AttributeSet childAttrs = Xml.asAttributeSet(childParser);
|
|
|
|
while ((type = childParser.next()) != XmlPullParser.START_TAG &&
|
|
type != XmlPullParser.END_DOCUMENT) {
|
|
// Empty.
|
|
}
|
|
|
|
if (type != XmlPullParser.START_TAG) {
|
|
throw new InflateException(childParser.getPositionDescription() +
|
|
": No start tag found!");
|
|
}
|
|
|
|
final String childName = childParser.getName();
|
|
|
|
if (TAG_MERGE.equals(childName)) {
|
|
// Inflate all children.
|
|
rInflate(childParser, parent, childAttrs);
|
|
} else {
|
|
final View view = createViewFromTag(childName, childAttrs);
|
|
final ViewGroup group = (ViewGroup) parent;
|
|
|
|
// We try to load the layout params set in the <include /> tag. If
|
|
// they don't exist, we will rely on the layout params set in the
|
|
// included XML file.
|
|
// During a layoutparams generation, a runtime exception is thrown
|
|
// if either layout_width or layout_height is missing. We catch
|
|
// this exception and set localParams accordingly: true means we
|
|
// successfully loaded layout params from the <include /> tag,
|
|
// false means we need to rely on the included layout params.
|
|
ViewGroup.LayoutParams params = null;
|
|
try {
|
|
params = group.generateLayoutParams(attrs);
|
|
} catch (RuntimeException e) {
|
|
params = group.generateLayoutParams(childAttrs);
|
|
} finally {
|
|
if (params != null) {
|
|
view.setLayoutParams(params);
|
|
}
|
|
}
|
|
|
|
// Inflate all children.
|
|
rInflate(childParser, view, childAttrs);
|
|
|
|
// Attempt to override the included layout's android:id with the
|
|
// one set on the <include /> tag itself.
|
|
TypedArray a = mContext.obtainStyledAttributes(attrs,
|
|
com.android.internal.R.styleable.View, 0, 0);
|
|
int id = a.getResourceId(com.android.internal.R.styleable.View_id, View.NO_ID);
|
|
// While we're at it, let's try to override android:visibility.
|
|
int visibility = a.getInt(com.android.internal.R.styleable.View_visibility, -1);
|
|
a.recycle();
|
|
|
|
if (id != View.NO_ID) {
|
|
view.setId(id);
|
|
}
|
|
|
|
switch (visibility) {
|
|
case 0:
|
|
view.setVisibility(View.VISIBLE);
|
|
break;
|
|
case 1:
|
|
view.setVisibility(View.INVISIBLE);
|
|
break;
|
|
case 2:
|
|
view.setVisibility(View.GONE);
|
|
break;
|
|
}
|
|
|
|
group.addView(view);
|
|
}
|
|
} finally {
|
|
childParser.close();
|
|
}
|
|
}
|
|
} else {
|
|
throw new InflateException("<include /> can only be used inside of a ViewGroup");
|
|
}
|
|
|
|
final int currentDepth = parser.getDepth();
|
|
while (((type = parser.next()) != XmlPullParser.END_TAG ||
|
|
parser.getDepth() > currentDepth) && type != XmlPullParser.END_DOCUMENT) {
|
|
// Empty
|
|
}
|
|
}
|
|
}
|