下面列出了android.util.AttributeSet#getPositionDescription ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Throw an exception because the specified class is not allowed to be inflated.
*/
private void failNotAllowed(String name, String prefix, AttributeSet attrs) {
throw new InflateException(attrs.getPositionDescription()
+ ": Class not allowed to be inflated "+ (prefix != null ? (prefix + name) : name));
}
@Override
public View onCreateView(View parent, String name, Context context, AttributeSet attrs) {
if (!"fragment".equals(name)) {
return null;
}
String fname = attrs.getAttributeValue(null, "class");
TypedArray a =
context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment);
if (fname == null) {
fname = a.getString(com.android.internal.R.styleable.Fragment_name);
}
int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID);
String tag = a.getString(com.android.internal.R.styleable.Fragment_tag);
a.recycle();
int containerId = parent != null ? parent.getId() : 0;
if (containerId == View.NO_ID && id == View.NO_ID && tag == null) {
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Must specify unique android:id, android:tag, or have a parent with"
+ " an id for " + fname);
}
// If we restored from a previous state, we may already have
// instantiated this fragment from the state and should use
// that instance instead of making a new one.
Fragment fragment = id != View.NO_ID ? findFragmentById(id) : null;
if (fragment == null && tag != null) {
fragment = findFragmentByTag(tag);
}
if (fragment == null && containerId != View.NO_ID) {
fragment = findFragmentById(containerId);
}
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x"
+ Integer.toHexString(id) + " fname=" + fname
+ " existing=" + fragment);
if (fragment == null) {
fragment = mContainer.instantiate(context, fname, null);
fragment.mFromLayout = true;
fragment.mFragmentId = id != 0 ? id : containerId;
fragment.mContainerId = containerId;
fragment.mTag = tag;
fragment.mInLayout = true;
fragment.mFragmentManager = this;
fragment.mHost = mHost;
fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState);
addFragment(fragment, true);
} else if (fragment.mInLayout) {
// A fragment already exists and it is not one we restored from
// previous state.
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Duplicate id 0x" + Integer.toHexString(id)
+ ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId)
+ " with another fragment for " + fname);
} else {
// This fragment was retained from a previous instance; get it
// going now.
fragment.mInLayout = true;
fragment.mHost = mHost;
// If this fragment is newly instantiated (either right now, or
// from last saved state), then give it the attributes to
// initialize itself.
if (!fragment.mRetaining) {
fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState);
}
}
// If we haven't finished entering the CREATED state ourselves yet,
// push the inflated child fragment along. This will ensureInflatedFragmentView
// at the right phase of the lifecycle so that we will have mView populated
// for compliant fragments below.
if (mCurState < Fragment.CREATED && fragment.mFromLayout) {
moveToState(fragment, Fragment.CREATED, 0, 0, false);
} else {
moveToState(fragment);
}
if (fragment.mView == null) {
throw new IllegalStateException("Fragment " + fname
+ " did not create a view.");
}
if (id != 0) {
fragment.mView.setId(id);
}
if (fragment.mView.getTag() == null) {
fragment.mView.setTag(tag);
}
return fragment.mView;
}
/**
* Parse a name/value pair out of an XML tag holding that data. The
* AttributeSet must be holding the data defined by
* {@link android.R.styleable#Extra}. The following value types are supported:
* <ul>
* <li> {@link TypedValue#TYPE_STRING}:
* {@link Bundle#putCharSequence Bundle.putCharSequence()}
* <li> {@link TypedValue#TYPE_INT_BOOLEAN}:
* {@link Bundle#putCharSequence Bundle.putBoolean()}
* <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}:
* {@link Bundle#putCharSequence Bundle.putBoolean()}
* <li> {@link TypedValue#TYPE_FLOAT}:
* {@link Bundle#putCharSequence Bundle.putFloat()}
* </ul>
*
* @param tagName The name of the tag these attributes come from; this is
* only used for reporting error messages.
* @param attrs The attributes from which to retrieve the name/value pair.
* @param outBundle The Bundle in which to place the parsed value.
* @throws XmlPullParserException If the attributes are not valid.
*/
public void parseBundleExtra(String tagName, AttributeSet attrs,
Bundle outBundle) throws XmlPullParserException {
TypedArray sa = obtainAttributes(attrs,
com.android.internal.R.styleable.Extra);
String name = sa.getString(
com.android.internal.R.styleable.Extra_name);
if (name == null) {
sa.recycle();
throw new XmlPullParserException("<" + tagName
+ "> requires an android:name attribute at "
+ attrs.getPositionDescription());
}
TypedValue v = sa.peekValue(
com.android.internal.R.styleable.Extra_value);
if (v != null) {
if (v.type == TypedValue.TYPE_STRING) {
CharSequence cs = v.coerceToString();
outBundle.putCharSequence(name, cs);
} else if (v.type == TypedValue.TYPE_INT_BOOLEAN) {
outBundle.putBoolean(name, v.data != 0);
} else if (v.type >= TypedValue.TYPE_FIRST_INT
&& v.type <= TypedValue.TYPE_LAST_INT) {
outBundle.putInt(name, v.data);
} else if (v.type == TypedValue.TYPE_FLOAT) {
outBundle.putFloat(name, v.getFloat());
} else {
sa.recycle();
throw new XmlPullParserException("<" + tagName
+ "> only supports string, integer, float, color, and boolean at "
+ attrs.getPositionDescription());
}
} else {
sa.recycle();
throw new XmlPullParserException("<" + tagName
+ "> requires an android:value or android:resource attribute at "
+ attrs.getPositionDescription());
}
sa.recycle();
}
public View onCreateView(View parent, String name, Context context, AttributeSet attrs) {
if (!"fragment".equals(name)) {
return null;
}
String fname = attrs.getAttributeValue(null, "class");
TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment);
if (fname == null) {
fname = a.getString(0);
}
int id = a.getResourceId(1, -1);
String tag = a.getString(2);
a.recycle();
if (!Fragment.isSupportFragmentClass(this.mHost.getContext(), fname)) {
return null;
}
int containerId;
if (parent != null) {
containerId = parent.getId();
} else {
containerId = 0;
}
if (containerId == -1 && id == -1 && tag == null) {
throw new IllegalArgumentException(attrs.getPositionDescription() + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname);
}
Fragment fragment;
if (id != -1) {
fragment = findFragmentById(id);
} else {
fragment = null;
}
if (fragment == null && tag != null) {
fragment = findFragmentByTag(tag);
}
if (fragment == null && containerId != -1) {
fragment = findFragmentById(containerId);
}
if (DEBUG) {
Log.v(TAG, "onCreateView: id=0x" + Integer.toHexString(id) + " fname=" + fname + " existing=" + fragment);
}
if (fragment == null) {
int i;
fragment = Fragment.instantiate(context, fname);
fragment.mFromLayout = true;
if (id != 0) {
i = id;
} else {
i = containerId;
}
fragment.mFragmentId = i;
fragment.mContainerId = containerId;
fragment.mTag = tag;
fragment.mInLayout = true;
fragment.mFragmentManager = this;
fragment.mHost = this.mHost;
fragment.onInflate(this.mHost.getContext(), attrs, fragment.mSavedFragmentState);
addFragment(fragment, true);
} else if (fragment.mInLayout) {
throw new IllegalArgumentException(attrs.getPositionDescription() + ": Duplicate id 0x" + Integer.toHexString(id) + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) + " with another fragment for " + fname);
} else {
fragment.mInLayout = true;
fragment.mHost = this.mHost;
if (!fragment.mRetaining) {
fragment.onInflate(this.mHost.getContext(), attrs, fragment.mSavedFragmentState);
}
}
if (this.mCurState >= 1 || !fragment.mFromLayout) {
moveToState(fragment);
} else {
moveToState(fragment, 1, 0, 0, false);
}
if (fragment.mView == null) {
throw new IllegalStateException("Fragment " + fname + " did not create a view.");
}
if (id != 0) {
fragment.mView.setId(id);
}
if (fragment.mView.getTag() == null) {
fragment.mView.setTag(tag);
}
return fragment.mView;
}
/**
* Add support for inflating the <fragment> tag.
*/
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (!"fragment".equals(name)) {
return super.onCreateView(name, context, attrs);
}
String fname = attrs.getAttributeValue(null, "class");
TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment);
if (fname == null) {
fname = a.getString(FragmentTag.Fragment_name);
}
int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID);
String tag = a.getString(FragmentTag.Fragment_tag);
a.recycle();
View parent = null; // NOTE: no way to get parent pre-Honeycomb.
int containerId = parent != null ? parent.getId() : 0;
if (containerId == View.NO_ID && id == View.NO_ID && tag == null) {
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname);
}
// If we restored from a previous state, we may already have
// instantiated this fragment from the state and should use
// that instance instead of making a new one.
Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null;
if (fragment == null && tag != null) {
fragment = mFragments.findFragmentByTag(tag);
}
if (fragment == null && containerId != View.NO_ID) {
fragment = mFragments.findFragmentById(containerId);
}
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x"
+ Integer.toHexString(id) + " fname=" + fname
+ " existing=" + fragment);
if (fragment == null) {
fragment = Fragment.instantiate(this, fname);
fragment.mFromLayout = true;
fragment.mFragmentId = id != 0 ? id : containerId;
fragment.mContainerId = containerId;
fragment.mTag = tag;
fragment.mInLayout = true;
fragment.mFragmentManager = mFragments;
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
mFragments.addFragment(fragment, true);
} else if (fragment.mInLayout) {
// A fragment already exists and it is not one we restored from
// previous state.
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Duplicate id 0x" + Integer.toHexString(id)
+ ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId)
+ " with another fragment for " + fname);
} else {
// This fragment was retained from a previous instance; get it
// going now.
fragment.mInLayout = true;
// If this fragment is newly instantiated (either right now, or
// from last saved state), then give it the attributes to
// initialize itself.
if (!fragment.mRetaining) {
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
}
mFragments.moveToState(fragment);
}
if (fragment.mView == null) {
throw new IllegalStateException("Fragment " + fname
+ " did not create a view.");
}
if (id != 0) {
fragment.mView.setId(id);
}
if (fragment.mView.getTag() == null) {
fragment.mView.setTag(tag);
}
return fragment.mView;
}
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (!"fragment".equals(name)) {
return null;
}
String fname = attrs.getAttributeValue(null, "class");
TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment);
if (fname == null) {
fname = a.getString(FragmentTag.Fragment_name);
}
int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID);
String tag = a.getString(FragmentTag.Fragment_tag);
a.recycle();
if (!Fragment.isSupportFragmentClass(mActivity, fname)) {
// Invalid support lib fragment; let the device's framework handle it.
// This will allow android.app.Fragments to do the right thing.
return null;
}
View parent = null; // NOTE: no way to get parent pre-Honeycomb.
int containerId = parent != null ? parent.getId() : 0;
if (containerId == View.NO_ID && id == View.NO_ID && tag == null) {
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname);
}
// If we restored from a previous state, we may already have
// instantiated this fragment from the state and should use
// that instance instead of making a new one.
Fragment fragment = id != View.NO_ID ? findFragmentById(id) : null;
if (fragment == null && tag != null) {
fragment = findFragmentByTag(tag);
}
if (fragment == null && containerId != View.NO_ID) {
fragment = findFragmentById(containerId);
}
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x"
+ Integer.toHexString(id) + " fname=" + fname
+ " existing=" + fragment);
if (fragment == null) {
fragment = Fragment.instantiate(context, fname);
fragment.mFromLayout = true;
fragment.mFragmentId = id != 0 ? id : containerId;
fragment.mContainerId = containerId;
fragment.mTag = tag;
fragment.mInLayout = true;
fragment.mFragmentManager = this;
fragment.onInflate(mActivity, attrs, fragment.mSavedFragmentState);
addFragment(fragment, true);
} else if (fragment.mInLayout) {
// A fragment already exists and it is not one we restored from
// previous state.
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Duplicate id 0x" + Integer.toHexString(id)
+ ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId)
+ " with another fragment for " + fname);
} else {
// This fragment was retained from a previous instance; get it
// going now.
fragment.mInLayout = true;
// If this fragment is newly instantiated (either right now, or
// from last saved state), then give it the attributes to
// initialize itself.
if (!fragment.mRetaining) {
fragment.onInflate(mActivity, attrs, fragment.mSavedFragmentState);
}
}
// If we haven't finished entering the CREATED state ourselves yet,
// push the inflated child fragment along.
if (mCurState < Fragment.CREATED && fragment.mFromLayout) {
moveToState(fragment, Fragment.CREATED, 0, 0, false);
} else {
moveToState(fragment);
}
if (fragment.mView == null) {
throw new IllegalStateException("Fragment " + fname
+ " did not create a view.");
}
if (id != 0) {
fragment.mView.setId(id);
}
if (fragment.mView.getTag() == null) {
fragment.mView.setTag(tag);
}
return fragment.mView;
}
/**
* Add support for inflating the <fragment> tag.
*/
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (!"fragment".equals(name)) {
return super.onCreateView(name, context, attrs);
}
String fname = attrs.getAttributeValue(null, "class");
TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment);
if (fname == null) {
fname = a.getString(FragmentTag.Fragment_name);
}
int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID);
String tag = a.getString(FragmentTag.Fragment_tag);
a.recycle();
if (!Fragment.isSupportFragmentClass(this, fname)) {
// Invalid support lib fragment; let the device's framework handle it.
// This will allow android.app.Fragments to do the right thing.
return super.onCreateView(name, context, attrs);
}
View parent = null; // NOTE: no way to get parent pre-Honeycomb.
int containerId = parent != null ? parent.getId() : 0;
if (containerId == View.NO_ID && id == View.NO_ID && tag == null) {
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname);
}
// If we restored from a previous state, we may already have
// instantiated this fragment from the state and should use
// that instance instead of making a new one.
Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null;
if (fragment == null && tag != null) {
fragment = mFragments.findFragmentByTag(tag);
}
if (fragment == null && containerId != View.NO_ID) {
fragment = mFragments.findFragmentById(containerId);
}
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x"
+ Integer.toHexString(id) + " fname=" + fname
+ " existing=" + fragment);
if (fragment == null) {
fragment = Fragment.instantiate(this, fname);
fragment.mFromLayout = true;
fragment.mFragmentId = id != 0 ? id : containerId;
fragment.mContainerId = containerId;
fragment.mTag = tag;
fragment.mInLayout = true;
fragment.mFragmentManager = mFragments;
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
mFragments.addFragment(fragment, true);
} else if (fragment.mInLayout) {
// A fragment already exists and it is not one we restored from
// previous state.
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Duplicate id 0x" + Integer.toHexString(id)
+ ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId)
+ " with another fragment for " + fname);
} else {
// This fragment was retained from a previous instance; get it
// going now.
fragment.mInLayout = true;
// If this fragment is newly instantiated (either right now, or
// from last saved state), then give it the attributes to
// initialize itself.
if (!fragment.mRetaining) {
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
}
mFragments.moveToState(fragment);
}
if (fragment.mView == null) {
throw new IllegalStateException("Fragment " + fname
+ " did not create a view.");
}
if (id != 0) {
fragment.mView.setId(id);
}
if (fragment.mView.getTag() == null) {
fragment.mView.setTag(tag);
}
return fragment.mView;
}
/**
* Add support for inflating the <fragment> tag.
*/
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (!"fragment".equals(name)) {
return super.onCreateView(name, context, attrs);
}
String fname = attrs.getAttributeValue(null, "class");
TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment);
if (fname == null) {
fname = a.getString(FragmentTag.Fragment_name);
}
int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID);
String tag = a.getString(FragmentTag.Fragment_tag);
a.recycle();
if (!Fragment.isSupportFragmentClass(this, fname)) {
// Invalid support lib fragment; let the device's framework handle it.
// This will allow android.app.Fragments to do the right thing.
return super.onCreateView(name, context, attrs);
}
View parent = null; // NOTE: no way to get parent pre-Honeycomb.
int containerId = parent != null ? parent.getId() : 0;
if (containerId == View.NO_ID && id == View.NO_ID && tag == null) {
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname);
}
// If we restored from a previous state, we may already have
// instantiated this fragment from the state and should use
// that instance instead of making a new one.
Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null;
if (fragment == null && tag != null) {
fragment = mFragments.findFragmentByTag(tag);
}
if (fragment == null && containerId != View.NO_ID) {
fragment = mFragments.findFragmentById(containerId);
}
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x"
+ Integer.toHexString(id) + " fname=" + fname
+ " existing=" + fragment);
if (fragment == null) {
fragment = Fragment.instantiate(this, fname);
fragment.mFromLayout = true;
fragment.mFragmentId = id != 0 ? id : containerId;
fragment.mContainerId = containerId;
fragment.mTag = tag;
fragment.mInLayout = true;
fragment.mFragmentManager = mFragments;
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
mFragments.addFragment(fragment, true);
} else if (fragment.mInLayout) {
// A fragment already exists and it is not one we restored from
// previous state.
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Duplicate id 0x" + Integer.toHexString(id)
+ ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId)
+ " with another fragment for " + fname);
} else {
// This fragment was retained from a previous instance; get it
// going now.
fragment.mInLayout = true;
// If this fragment is newly instantiated (either right now, or
// from last saved state), then give it the attributes to
// initialize itself.
if (!fragment.mRetaining) {
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
}
mFragments.moveToState(fragment);
}
if (fragment.mView == null) {
throw new IllegalStateException("Fragment " + fname
+ " did not create a view.");
}
if (id != 0) {
fragment.mView.setId(id);
}
if (fragment.mView.getTag() == null) {
fragment.mView.setTag(tag);
}
return fragment.mView;
}
/**
* Add support for inflating the <fragment> tag.
*/
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (!"fragment".equals(name)) {
return super.onCreateView(name, context, attrs);
}
String fname = attrs.getAttributeValue(null, "class");
TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment);
if (fname == null) {
fname = a.getString(FragmentTag.Fragment_name);
}
int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID);
String tag = a.getString(FragmentTag.Fragment_tag);
a.recycle();
if (!Fragment.isSupportFragmentClass(this, fname)) {
// Invalid support lib fragment; let the device's framework handle it.
// This will allow android.app.Fragments to do the right thing.
return super.onCreateView(name, context, attrs);
}
View parent = null; // NOTE: no way to get parent pre-Honeycomb.
int containerId = parent != null ? parent.getId() : 0;
if (containerId == View.NO_ID && id == View.NO_ID && tag == null) {
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname);
}
// If we restored from a previous state, we may already have
// instantiated this fragment from the state and should use
// that instance instead of making a new one.
Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null;
if (fragment == null && tag != null) {
fragment = mFragments.findFragmentByTag(tag);
}
if (fragment == null && containerId != View.NO_ID) {
fragment = mFragments.findFragmentById(containerId);
}
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x"
+ Integer.toHexString(id) + " fname=" + fname
+ " existing=" + fragment);
if (fragment == null) {
fragment = Fragment.instantiate(this, fname);
fragment.mFromLayout = true;
fragment.mFragmentId = id != 0 ? id : containerId;
fragment.mContainerId = containerId;
fragment.mTag = tag;
fragment.mInLayout = true;
fragment.mFragmentManager = mFragments;
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
mFragments.addFragment(fragment, true);
} else if (fragment.mInLayout) {
// A fragment already exists and it is not one we restored from
// previous state.
throw new IllegalArgumentException(attrs.getPositionDescription()
+ ": Duplicate id 0x" + Integer.toHexString(id)
+ ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId)
+ " with another fragment for " + fname);
} else {
// This fragment was retained from a previous instance; get it
// going now.
fragment.mInLayout = true;
// If this fragment is newly instantiated (either right now, or
// from last saved state), then give it the attributes to
// initialize itself.
if (!fragment.mRetaining) {
fragment.onInflate(this, attrs, fragment.mSavedFragmentState);
}
mFragments.moveToState(fragment);
}
if (fragment.mView == null) {
throw new IllegalStateException("Fragment " + fname
+ " did not create a view.");
}
if (id != 0) {
fragment.mView.setId(id);
}
if (fragment.mView.getTag() == null) {
fragment.mView.setTag(tag);
}
return fragment.mView;
}