This is a drop-down head View supports parallax effect, support refresh libraries！ If you have any questions in the course or suggestions, please send an e-mail to the following e-mail, thank you!
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// ListView
<net.soulwolf.widget.parallaxrefresh.ParallaxScrollLayout
android:id="@+id/parallax"
android:layout_width="match_parent"
android:layout_height="match_parent">
<net.soulwolf.widget.parallaxrefresh.widget.ParallaxListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</net.soulwolf.widget.parallaxrefresh.ParallaxScrollLayout>
// ScrollView
<net.soulwolf.widget.parallaxrefresh.ParallaxScrollLayout
android:id="@+id/parallax"
android:layout_width="match_parent"
android:layout_height="match_parent">
<net.soulwolf.widget.parallaxrefresh.widget.ParallaxScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white">
<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
card_view:cardBackgroundColor="@color/sample_primary"
card_view:cardCornerRadius="10dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/activity_horizontal_margin"
android:text="@string/card_text"
android:textColor="@android:color/white"
android:textSize="16sp" />
</android.support.v7.widget.CardView>
</FrameLayout>
</net.soulwolf.widget.parallaxrefresh.widget.ParallaxScrollView>
</net.soulwolf.widget.parallaxrefresh.ParallaxScrollLayout> // ParallaxHolder
public class SimpleParallaxHolder extends BaseParallaxHolder {
@Override
public int getParallaxTop() {
return (int) (getRealHeight() * .1f);
}
@Override
public int getParallaxBottom() {
return (int) (getRealHeight() * .4f);
}
@Override
protected View onCreateView(LayoutInflater inflater, ViewGroup container, boolean attachRoot) {
return inflater.inflate(R.layout.simple_parallax_holder,container,attachRoot);
}
@Override
public void onCreate(Context context) {
super.onCreate(context);
}
@Override
public void onMeasured(int width, int height) {
super.onMeasured(width, height);
}
@Override
public int getRealWidth() {
return super.getRealWidth();
}
@Override
public int getRealHeight() {
return super.getRealHeight();
}
@Override
public void onScrollChanged(int scrollX, int scrollY, boolean isTouchEvent) {
super.onScrollChanged(scrollX, scrollY, isTouchEvent);
}
@Override
public void onRollback() {
super.onRollback();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public View getContentView() {
return super.getContentView();
}
}
// ListView And ScrollView
ParallaxScrollLayout mParallaxScrollLayout = (ParallaxScrollLayout) findViewById(R.id.parallax);
mListView = (ListView) findViewById(R.id.list);
mParallaxScrollLayout.setParallaxHolder(new SimpleParallaxHolder());
mParallaxScrollLayout.setRefreshRatio(.8f);
mParallaxScrollLayout.setOnRefreshListener(this);
// OnRefreshListener
OnRefreshListener listener = new OnRefreshListener(){
public void onRefresh(){
// refresh
}
};| attrName | Explanation |
| psvParallaxMode | This parameter indicates whether or not to follow the head View scroll through the list, the default scroll (scroll) |
- ParallaxScrollView
- ParallaxListView
- ParallaxGridView
public class ParallaxListView extends ListView implements ParallaxScrollObserver, AbsListView.OnScrollListener {
private ParallaxScrollCallback mParallaxScrollCallback;
private int mScrollY;
private OnScrollListener mDelegateOnScrollListener;
public ParallaxListView(Context context) {
super(context);
initialize();
}
public ParallaxListView(Context context, AttributeSet attrs) {
super(context, attrs);
initialize();
}
public ParallaxListView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initialize();
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public ParallaxListView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
initialize();
}
private void initialize() {
super.setOnScrollListener(this);
}
@Override
public void setScrollCallback(@NonNull ParallaxScrollCallback callback) {
this.mParallaxScrollCallback = callback;
}
@Override
public void setPlaceholder(@NonNull View view) {
removeHeaderView(view);
addHeaderView(view);
}
@Override
public void setOnScrollListener(OnScrollListener l) {
this.mDelegateOnScrollListener = l;
}
private int getRealScrollY() {
View c = getChildCount() > 0 ? getChildAt(0) : null;
if (c == null) {
return 0;
}
int firstVisiblePosition = getFirstVisiblePosition();
int top = c.getTop();
return -top + firstVisiblePosition * c.getHeight() ;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if(mDelegateOnScrollListener != null){
mDelegateOnScrollListener.onScrollStateChanged(view,scrollState);
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
int realScrollY = getRealScrollY();
if(mParallaxScrollCallback != null && realScrollY != mScrollY){
mParallaxScrollCallback.onParallaxScrollChanged(0,realScrollY,true);
mScrollY = realScrollY;
}
if(mDelegateOnScrollListener != null){
mDelegateOnScrollListener.onScroll(view,firstVisibleItem,visibleItemCount,totalItemCount);
}
}
}<dependency>
<groupId>net.soulwolf.widget</groupId>
<url>https://dl.bintray.com/soulwolf/maven</url>
<artifactId>parallaxRefresh</artifactId>
<version>1.0.1</version>
</dependency>
allprojects {
repositories {
jcenter()
}
}
compile 'net.soulwolf.widget:parallaxRefresh:1.0.1'
Ching Soulwolf - Ching.Soulwolf@gmail.com
Copyright 2015 Soulwolf Ching
Copyright 2015 The Android Open Source Project for Android-ParallaxRefresh
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.