You've already forked android_translation_layer
mirror of
https://gitlab.com/android_translation_layer/android_translation_layer.git
synced 2025-10-27 11:48:10 -07:00
copy ViewStub from AOSP
This commit is contained in:
Julian Winkler
@@ -1,44 +1,199 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (C) 2008 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;
|
package android.view;
|
||||||
|
|
||||||
|
import java.lang.ref.WeakReference;
|
||||||
|
|
||||||
|
import com.android.internal.R;
|
||||||
|
|
||||||
import android.content.Context;
|
import android.content.Context;
|
||||||
import android.content.res.TypedArray;
|
import android.content.res.TypedArray;
|
||||||
|
import android.graphics.Canvas;
|
||||||
import android.util.AttributeSet;
|
import android.util.AttributeSet;
|
||||||
|
|
||||||
public class ViewStub extends View {
|
/**
|
||||||
|
* A ViewStub is an invisible, zero-sized View that can be used to lazily inflate
|
||||||
|
* layout resources at runtime.
|
||||||
|
*
|
||||||
|
* When a ViewStub is made visible, or when {@link #inflate()} is invoked, the layout resource
|
||||||
|
* is inflated. The ViewStub then replaces itself in its parent with the inflated View or Views.
|
||||||
|
* Therefore, the ViewStub exists in the view hierarchy until {@link #setVisibility(int)} or
|
||||||
|
* {@link #inflate()} is invoked.
|
||||||
|
*
|
||||||
|
* The inflated View is added to the ViewStub's parent with the ViewStub's layout
|
||||||
|
* parameters. Similarly, you can define/override the inflate View's id by using the
|
||||||
|
* ViewStub's inflatedId property. For instance:
|
||||||
|
*
|
||||||
|
* <pre>
|
||||||
|
* <ViewStub android:id="@+id/stub"
|
||||||
|
* android:inflatedId="@+id/subTree"
|
||||||
|
* android:layout="@layout/mySubTree"
|
||||||
|
* android:layout_width="120dip"
|
||||||
|
* android:layout_height="40dip" />
|
||||||
|
* </pre>
|
||||||
|
*
|
||||||
|
* The ViewStub thus defined can be found using the id "stub." After inflation of
|
||||||
|
* the layout resource "mySubTree," the ViewStub is removed from its parent. The
|
||||||
|
* View created by inflating the layout resource "mySubTree" can be found using the
|
||||||
|
* id "subTree," specified by the inflatedId property. The inflated View is finally
|
||||||
|
* assigned a width of 120dip and a height of 40dip.
|
||||||
|
*
|
||||||
|
* The preferred way to perform the inflation of the layout resource is the following:
|
||||||
|
*
|
||||||
|
* <pre>
|
||||||
|
* ViewStub stub = (ViewStub) findViewById(R.id.stub);
|
||||||
|
* View inflated = stub.inflate();
|
||||||
|
* </pre>
|
||||||
|
*
|
||||||
|
* When {@link #inflate()} is invoked, the ViewStub is replaced by the inflated View
|
||||||
|
* and the inflated View is returned. This lets applications get a reference to the
|
||||||
|
* inflated View without executing an extra findViewById().
|
||||||
|
*
|
||||||
|
* @attr ref android.R.styleable#ViewStub_inflatedId
|
||||||
|
* @attr ref android.R.styleable#ViewStub_layout
|
||||||
|
*/
|
||||||
|
public final class ViewStub extends View {
|
||||||
|
private int mLayoutResource = 0;
|
||||||
|
private int mInflatedId;
|
||||||
|
|
||||||
private int layoutResource;
|
private WeakReference<View> mInflatedViewRef;
|
||||||
private int inflatedId = View.NO_ID;
|
|
||||||
|
private LayoutInflater mInflater;
|
||||||
|
private OnInflateListener mInflateListener;
|
||||||
|
private boolean initialized = false;
|
||||||
|
|
||||||
public ViewStub(Context context) {
|
public ViewStub(Context context) {
|
||||||
this(context, null, 0);
|
super(context);
|
||||||
|
initialize(context);
|
||||||
}
|
}
|
||||||
|
|
||||||
public ViewStub(Context context, AttributeSet attributeSet) {
|
/**
|
||||||
this(context, attributeSet, 0);
|
* Creates a new ViewStub with the specified layout resource.
|
||||||
|
*
|
||||||
|
* @param context The application's environment.
|
||||||
|
* @param layoutResource The reference to a layout resource that will be inflated.
|
||||||
|
*/
|
||||||
|
public ViewStub(Context context, int layoutResource) {
|
||||||
|
super(context);
|
||||||
|
mLayoutResource = layoutResource;
|
||||||
|
initialize(context);
|
||||||
}
|
}
|
||||||
|
|
||||||
public ViewStub(Context context, AttributeSet attributeSet, int defStyle) {
|
public ViewStub(Context context, AttributeSet attrs) {
|
||||||
super(context, attributeSet, defStyle);
|
this(context, attrs, 0);
|
||||||
TypedArray a = context.obtainStyledAttributes(attributeSet, com.android.internal.R.styleable.ViewStub);
|
}
|
||||||
layoutResource = a.getResourceId(com.android.internal.R.styleable.ViewStub_layout, -1);
|
|
||||||
|
@SuppressWarnings({"UnusedDeclaration"})
|
||||||
|
public ViewStub(Context context, AttributeSet attrs, int defStyle) {
|
||||||
|
super(context, attrs, defStyle);
|
||||||
|
TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.ViewStub,
|
||||||
|
defStyle, 0);
|
||||||
|
|
||||||
|
mInflatedId = a.getResourceId(R.styleable.ViewStub_inflatedId, NO_ID);
|
||||||
|
mLayoutResource = a.getResourceId(R.styleable.ViewStub_layout, 0);
|
||||||
|
|
||||||
a.recycle();
|
a.recycle();
|
||||||
|
|
||||||
|
a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.View, defStyle, 0);
|
||||||
|
id = a.getResourceId(R.styleable.View_id, NO_ID);
|
||||||
|
a.recycle();
|
||||||
|
|
||||||
|
initialize(context);
|
||||||
}
|
}
|
||||||
|
|
||||||
public View inflate() {
|
private void initialize(Context context) {
|
||||||
if (layoutResource == -1)
|
initialized = true;
|
||||||
throw new IllegalStateException("ViewStub must have a valid layoutResource");
|
setVisibility(GONE);
|
||||||
ViewGroup parent = (ViewGroup) getParent();
|
setWillNotDraw(true);
|
||||||
View view = LayoutInflater.from(getContext()).inflate(layoutResource, parent, false);
|
|
||||||
if (inflatedId != View.NO_ID)
|
|
||||||
view.setId(inflatedId);
|
|
||||||
int index = parent.indexOfChild(this);
|
|
||||||
parent.removeView(this);
|
|
||||||
parent.addView(view, index, getLayoutParams());
|
|
||||||
return view;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Returns the id taken by the inflated view. If the inflated id is
|
||||||
|
* {@link View#NO_ID}, the inflated view keeps its original id.
|
||||||
|
*
|
||||||
|
* @return A positive integer used to identify the inflated view or
|
||||||
|
* {@link #NO_ID} if the inflated view should keep its id.
|
||||||
|
*
|
||||||
|
* @see #setInflatedId(int)
|
||||||
|
* @attr ref android.R.styleable#ViewStub_inflatedId
|
||||||
|
*/
|
||||||
|
public int getInflatedId() {
|
||||||
|
return mInflatedId;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Defines the id taken by the inflated view. If the inflated id is
|
||||||
|
* {@link View#NO_ID}, the inflated view keeps its original id.
|
||||||
|
*
|
||||||
|
* @param inflatedId A positive integer used to identify the inflated view or
|
||||||
|
* {@link #NO_ID} if the inflated view should keep its id.
|
||||||
|
*
|
||||||
|
* @see #getInflatedId()
|
||||||
|
* @attr ref android.R.styleable#ViewStub_inflatedId
|
||||||
|
*/
|
||||||
|
public void setInflatedId(int inflatedId) {
|
||||||
|
mInflatedId = inflatedId;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Returns the layout resource that will be used by {@link #setVisibility(int)} or
|
||||||
|
* {@link #inflate()} to replace this StubbedView
|
||||||
|
* in its parent by another view.
|
||||||
|
*
|
||||||
|
* @return The layout resource identifier used to inflate the new View.
|
||||||
|
*
|
||||||
|
* @see #setLayoutResource(int)
|
||||||
|
* @see #setVisibility(int)
|
||||||
|
* @see #inflate()
|
||||||
|
* @attr ref android.R.styleable#ViewStub_layout
|
||||||
|
*/
|
||||||
|
public int getLayoutResource() {
|
||||||
|
return mLayoutResource;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Specifies the layout resource to inflate when this StubbedView becomes visible or invisible
|
||||||
|
* or when {@link #inflate()} is invoked. The View created by inflating the layout resource is
|
||||||
|
* used to replace this StubbedView in its parent.
|
||||||
|
*
|
||||||
|
* @param layoutResource A valid layout resource identifier (different from 0.)
|
||||||
|
*
|
||||||
|
* @see #getLayoutResource()
|
||||||
|
* @see #setVisibility(int)
|
||||||
|
* @see #inflate()
|
||||||
|
* @attr ref android.R.styleable#ViewStub_layout
|
||||||
|
*/
|
||||||
public void setLayoutResource(int layoutResource) {
|
public void setLayoutResource(int layoutResource) {
|
||||||
this.layoutResource = layoutResource;
|
mLayoutResource = layoutResource;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Set {@link LayoutInflater} to use in {@link #inflate()}, or {@code null}
|
||||||
|
* to use the default.
|
||||||
|
*/
|
||||||
|
public void setLayoutInflater(LayoutInflater inflater) {
|
||||||
|
mInflater = inflater;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Get current {@link LayoutInflater} used in {@link #inflate()}.
|
||||||
|
*/
|
||||||
|
public LayoutInflater getLayoutInflater() {
|
||||||
|
return mInflater;
|
||||||
}
|
}
|
||||||
|
|
||||||
@Override
|
@Override
|
||||||
@@ -46,8 +201,121 @@ public class ViewStub extends View {
|
|||||||
setMeasuredDimension(0, 0);
|
setMeasuredDimension(0, 0);
|
||||||
}
|
}
|
||||||
|
|
||||||
public void setInflatedId(int inflatedId) {
|
@Override
|
||||||
this.inflatedId = inflatedId;
|
public void draw(Canvas canvas) {
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
protected void dispatchDraw(Canvas canvas) {
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* When visibility is set to {@link #VISIBLE} or {@link #INVISIBLE},
|
||||||
|
* {@link #inflate()} is invoked and this StubbedView is replaced in its parent
|
||||||
|
* by the inflated layout resource. After that calls to this function are passed
|
||||||
|
* through to the inflated view.
|
||||||
|
*
|
||||||
|
* @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}.
|
||||||
|
*
|
||||||
|
* @see #inflate()
|
||||||
|
*/
|
||||||
|
@Override
|
||||||
|
public void setVisibility(int visibility) {
|
||||||
|
if (!initialized)
|
||||||
|
return;
|
||||||
|
if (mInflatedViewRef != null) {
|
||||||
|
View view = mInflatedViewRef.get();
|
||||||
|
if (view != null) {
|
||||||
|
view.setVisibility(visibility);
|
||||||
|
} else {
|
||||||
|
throw new IllegalStateException("setVisibility called on un-referenced view");
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
super.setVisibility(visibility);
|
||||||
|
if (visibility == VISIBLE || visibility == INVISIBLE) {
|
||||||
|
inflate();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Inflates the layout resource identified by {@link #getLayoutResource()}
|
||||||
|
* and replaces this StubbedView in its parent by the inflated layout resource.
|
||||||
|
*
|
||||||
|
* @return The inflated layout resource.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
public View inflate() {
|
||||||
|
final ViewParent viewParent = getParent();
|
||||||
|
|
||||||
|
if (viewParent != null && viewParent instanceof ViewGroup) {
|
||||||
|
if (mLayoutResource != 0) {
|
||||||
|
final ViewGroup parent = (ViewGroup) viewParent;
|
||||||
|
final LayoutInflater factory;
|
||||||
|
if (mInflater != null) {
|
||||||
|
factory = mInflater;
|
||||||
|
} else {
|
||||||
|
factory = LayoutInflater.from(getContext());
|
||||||
|
}
|
||||||
|
final View view = factory.inflate(mLayoutResource, parent,
|
||||||
|
false);
|
||||||
|
|
||||||
|
if (mInflatedId != NO_ID) {
|
||||||
|
view.setId(mInflatedId);
|
||||||
|
}
|
||||||
|
|
||||||
|
final int index = parent.indexOfChild(this);
|
||||||
|
parent.removeViewInLayout(this);
|
||||||
|
|
||||||
|
final ViewGroup.LayoutParams layoutParams = getLayoutParams();
|
||||||
|
if (layoutParams != null) {
|
||||||
|
parent.addView(view, index, layoutParams);
|
||||||
|
} else {
|
||||||
|
parent.addView(view, index);
|
||||||
|
}
|
||||||
|
|
||||||
|
mInflatedViewRef = new WeakReference<View>(view);
|
||||||
|
|
||||||
|
if (mInflateListener != null) {
|
||||||
|
mInflateListener.onInflate(this, view);
|
||||||
|
}
|
||||||
|
|
||||||
|
return view;
|
||||||
|
} else {
|
||||||
|
throw new IllegalArgumentException("ViewStub must have a valid layoutResource");
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
throw new IllegalStateException("ViewStub must have a non-null ViewGroup viewParent");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Specifies the inflate listener to be notified after this ViewStub successfully
|
||||||
|
* inflated its layout resource.
|
||||||
|
*
|
||||||
|
* @param inflateListener The OnInflateListener to notify of successful inflation.
|
||||||
|
*
|
||||||
|
* @see android.view.ViewStub.OnInflateListener
|
||||||
|
*/
|
||||||
|
public void setOnInflateListener(OnInflateListener inflateListener) {
|
||||||
|
mInflateListener = inflateListener;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Listener used to receive a notification after a ViewStub has successfully
|
||||||
|
* inflated its layout resource.
|
||||||
|
*
|
||||||
|
* @see android.view.ViewStub#setOnInflateListener(android.view.ViewStub.OnInflateListener)
|
||||||
|
*/
|
||||||
|
public static interface OnInflateListener {
|
||||||
|
/**
|
||||||
|
* Invoked after a ViewStub successfully inflated its layout resource.
|
||||||
|
* This method is invoked after the inflated view was added to the
|
||||||
|
* hierarchy but before the layout pass.
|
||||||
|
*
|
||||||
|
* @param stub The ViewStub that initiated the inflation.
|
||||||
|
* @param inflated The inflated View.
|
||||||
|
*/
|
||||||
|
void onInflate(ViewStub stub, View inflated);
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user