使用HoritzontalScrollView Android创建图库
我正在尝试使用HortizontalScrollView创建一个ImageView库，因为该库已被弃用，而且无法正常工作。但是我找不到像Gallery这样的幻灯片图片的表格。我已经完成了以下代码： -xml文件：使用HoritzontalScrollView Android创建图库,android,scroll,gallery,slide,Android,Scroll,Gallery,Slide,我正在尝试使用HortizontalScrollView创建一个ImageView库，因为该库已被弃用，而且无法正常工作。但是我找不到像Gallery这样的幻灯片图片的表格。我已经完成了以下代码： -xml文件： <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_wid
<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:background="@color/backgroundColor"
android:id="@+id/general"
tools:context="com.mappleapps.tm2ibz.Activity.PoblacionsActivity">
<HorizontalScrollView
android:layout_width="match_parent"
android:layout_height="198dp"
android:id="@+id/layGalMap">
<LinearLayout
android:id="@+id/mygallery"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
/>
</HorizontalScrollView>
public class CenterLockHorizontalScrollview extends HorizontalScrollView {
Context context;
int prevIndex = 0;
public CenterLockHorizontalScrollview(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
this.setSmoothScrollingEnabled(true);
}
public void setAdapter(Context context, CustomListAdapter mAdapter) {
try {
fillViewWithAdapter(mAdapter);
} catch (ZeroChildException e) {
e.printStackTrace();
}
}
private void fillViewWithAdapter(CustomListAdapter mAdapter)
throws ZeroChildException {
if (getChildCount() == 0) {
throw new ZeroChildException(
"CenterLockHorizontalScrollView must have one child");
}
if (getChildCount() == 0 || mAdapter == null)
return;
ViewGroup parent = (ViewGroup) getChildAt(0);
parent.removeAllViews();
for (int i = 0; i < mAdapter.getCount(); i++) {
parent.addView(mAdapter.getView(i, null, parent));
}
}
public void setCenter(int index) {
ViewGroup parent = (ViewGroup) getChildAt(0);
View preView = parent.getChildAt(prevIndex);
preView.setBackgroundColor(Color.parseColor("#64CBD8"));
android.widget.LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(5, 5, 5, 5);
preView.setLayoutParams(lp);
View view = parent.getChildAt(index);
view.setBackgroundColor(Color.RED);
int screenWidth = ((Activity) context).getWindowManager()
.getDefaultDisplay().getWidth();
int scrollX = (view.getLeft() - (screenWidth / 2))
+ (view.getWidth() / 2);
this.smoothScrollTo(scrollX, 0);
prevIndex = index;
}
}
公共类CenterLockHorizontalScrollview扩展了HorizontalScrollView{
语境；
int-prevIndex=0；
public CenterLockHorizontalScrollview（上下文上下文、属性集属性）{
超级（上下文，attrs）；
this.context=上下文；
此.setSmoothScrollingEnabled（true）；
}
public void setAdapter（上下文上下文，CustomListAdapter mAdapter）{
试一试{
用适配器填充视图（mAdapter）；
}捕获（零异常）{
e、 printStackTrace（）；
}
}
专用void fillview with adapter（CustomListAdapter mAdapter）
抛出0个异常{
如果（getChildCount（）==0）{
抛出新的ZeroChildException(
“CenterLockHorizontalScrollView必须有一个子项”）；
}
if（getChildCount（）==0 | | mAdapter==null）
回来
ViewGroup parent=（ViewGroup）getChildAt（0）；
parent.removeallview（）；
对于（int i=0；i<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" >
<com.krish.horizontalscrollview.CenterLockHorizontalScrollview
android:id="@+id/scrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
</LinearLayout>
</com.krish.horizontalscrollview.CenterLockHorizontalScrollview>
<LinearLayout
android:id="@+id/bottomLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@id/scrollView"
android:orientation="horizontal"
android:weightSum="2" >
<Button
android:id="@+id/btnPrev"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Prev" />
<Button
android:id="@+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Next" />
</LinearLayout>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@id/bottomLayout"
android:layout_alignParentTop="true"
android:layout_centerInParent="true"
android:textColor="#FF0000"
android:padding="@dimen/padding_medium" />
</RelativeLayout>
public class HorizontalScrollViewActivity extends Activity {
CenterLockHorizontalScrollview centerLockHorizontalScrollview;
CustomListAdapter customListAdapter;
Button btnPrev, btnNext;
int currIndex = 0;
private TextView text;
ArrayList<String> list = new ArrayList<String>() {
{
add("Manchester city");
add("Manchester United");
add("Chelsea");
add("Liverpool");
add("TottenHam");
add("Everton");
add("WestHam");
add("Arsenal");
add("West Broom");
add("New Castle");
add("Norich City");
add("Swansea city");
add("stroke city");
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_horizontal_scroll_view);
btnNext = (Button) findViewById(R.id.btnNext);
btnPrev = (Button) findViewById(R.id.btnPrev);
text=(TextView)findViewById(R.id.text);
centerLockHorizontalScrollview = (CenterLockHorizontalScrollview) findViewById(R.id.scrollView);
customListAdapter = new CustomListAdapter(this,
R.layout.news_list_item, list);
centerLockHorizontalScrollview.setAdapter(this, customListAdapter);
btnNext.setOnClickListener(onClickListener);
btnPrev.setOnClickListener(onClickListener);
}
OnClickListener onClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
if (v.getId() == R.id.btnPrev) {
if (currIndex != 0) {
currIndex--;
centerLockHorizontalScrollview.setCenter(currIndex);
text.setText(list.get(currIndex==0?0:currIndex-1));
}
} else if (v.getId() == R.id.btnNext) {
if (currIndex < list.size()) {
centerLockHorizontalScrollview.setCenter(currIndex);
currIndex++;
text.setText(list.get(currIndex-1));
}
}
}
};
}
公共类HorizontalScrollViewActivity扩展活动{
中心锁定水平滚动视图中心锁定水平滚动视图；
CustomListAdapter CustomListAdapter；
按钮btnPrev，btnNext；
int currIndex=0；
私有文本查看文本；
ArrayList=新的ArrayList（）{
{
加上（“曼彻斯特城”）；
加上（“曼联”）；
添加（“切尔西”）；
加上（“利物浦”）；
添加（“托特纳姆”）；
添加（“埃弗顿”）；
添加（“西汉姆”）；
添加（“阿森纳”）；
添加（“西扫帚”）；
添加（“新城堡”）；
添加（“诺里奇市”）；
添加（“斯旺西市”）；
添加（“中风城市”）；
}
};
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u horizontal\u scroll\u view）；
btnNext=（按钮）findViewById（R.id.btnNext）；
btnPrev=（按钮）findViewById（R.id.btnPrev）；
text=（TextView）findViewById（R.id.text）；
centerLockHorizontalScrollview=（centerLockHorizontalScrollview）findViewById（R.id.scrollView）；
customListAdapter=新的customListAdapter（此，
R.layout.news\u list\u item，list）；
centerLockHorizontalScrollview.setAdapter（这是customListAdapter）；
setOnClickListener（onClickListener）；
btnPrev.setOnClickListener（onClickListener）；
}
OnClickListener OnClickListener=新的OnClickListener（）{
@凌驾
公共void onClick（视图v）{
如果（v.getId（）==R.id.btnPrev）{
如果（当前索引！=0）{
货币指数--；
centerLockHorizontalScrollview.setCenter（当前索引）；
text.setText（list.get（currendex==0？0:currendex-1））；
}
}else if（v.getId（）==R.id.btnNext）{
if（currendex您可以尝试使用自定义的HorizontaListView XML中的HorizontalListView
<com.example.HorizontalListView
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:gravity="left"
android:smoothScrollbar="true"
android:spacing="5dip"
android:visibility="gone" />
package com.example;
import java.util.LinkedList;
import java.util.Queue;
import android.content.Context;
import android.database.DataSetObserver;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.Scroller;
public class HorizontalListView extends AdapterView<ListAdapter> {
public boolean mAlwaysOverrideTouch = true;
protected ListAdapter mAdapter;
private int mLeftViewIndex = -1;
private int mRightViewIndex = 0;
protected int mCurrentX;
protected int mNextX;
private int mMaxX = Integer.MAX_VALUE;
private int mDisplayOffset = 0;
protected Scroller mScroller;
private GestureDetector mGesture;
private Queue mRemovedViewQueue = new LinkedList();
private OnItemSelectedListener mOnItemSelected;
private OnItemClickListener mOnItemClicked;
private OnItemLongClickListener mOnItemLongClicked;
private boolean mDataChanged = false;
private int mCurrentlySelectedAdapterIndex;
public HorizontalListView(Context context, AttributeSet attrs) {
super(context, attrs);
initView();
}
private synchronized void initView() {
mLeftViewIndex = -1;
mRightViewIndex = 0;
mDisplayOffset = 0;
mCurrentX = 0;
mNextX = 0;
mMaxX = Integer.MAX_VALUE;
mScroller = new Scroller(getContext());
mGesture = new GestureDetector(getContext(), mOnGesture);
}
@Override
public void setOnItemSelectedListener(
AdapterView.OnItemSelectedListener listener) {
mOnItemSelected = listener;
}
@Override
public void setOnItemClickListener(AdapterView.OnItemClickListener listener) {
mOnItemClicked = listener;
}
@Override
public void setOnItemLongClickListener(
AdapterView.OnItemLongClickListener listener) {
mOnItemLongClicked = listener;
}
@Override
protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld) {
super.onSizeChanged(xNew, yNew, xOld, yOld);
setSelection(getCount());
}
private DataSetObserver mDataObserver = new DataSetObserver() {
@Override
public void onChanged() {
synchronized (HorizontalListView.this) {
mDataChanged = true;
}
invalidate();
requestLayout();
}
@Override
public void onInvalidated() {
reset();
invalidate();
requestLayout();
}
};
@Override
public ListAdapter getAdapter() {
return mAdapter;
}
@Override
public View getSelectedView() {
// TODO: implement
// return null;
return getChild(mCurrentlySelectedAdapterIndex);
}
private View getChild(int adapterIndex) {
if (adapterIndex >= mLeftViewIndex && adapterIndex <= mRightViewIndex) {
Log.v("", "last item pos "+(adapterIndex - mLeftViewIndex));
getChildAt(adapterIndex - mLeftViewIndex);
}
return getChildAt(adapterIndex - mLeftViewIndex);
}
@Override
public void setAdapter(ListAdapter adapter) {
if (mAdapter != null) {
mAdapter.unregisterDataSetObserver(mDataObserver);
}
mAdapter = adapter;
mAdapter.registerDataSetObserver(mDataObserver);
reset();
}
private synchronized void reset() {
initView();
removeAllViewsInLayout();
requestLayout();
}
@Override
public void setSelection(int position) {
// TODO: implement
mCurrentlySelectedAdapterIndex = position;
getChild(mCurrentlySelectedAdapterIndex);
// getSelectedView();
// mCurrentlySelectedAdapterIndex = position
}
private void addAndMeasureChild(final View child, int viewPos) {
LayoutParams params = child.getLayoutParams();
if (params == null) {
params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
}
addViewInLayout(child, viewPos, params, true);
child.measure(
MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST),
MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST));
}
@Override
protected synchronized void onLayout(boolean changed, int left, int top,
int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (mAdapter == null) {
return;
}
if (mDataChanged) {
int oldCurrentX = mCurrentX;
initView();
removeAllViewsInLayout();
mNextX = oldCurrentX;
mDataChanged = false;
}
if (mScroller.computeScrollOffset()) {
int scrollx = mScroller.getCurrX();
mNextX = scrollx;
}
if (mNextX <= 0) {
mNextX = 0;
mScroller.forceFinished(true);
}
if (mNextX >= mMaxX) {
mNextX = mMaxX;
mScroller.forceFinished(true);
}
int dx = mCurrentX - mNextX;
// removeNonVisibleItems(dx);
fillList(dx);
positionItems(dx);
mCurrentX = mNextX;
if (!mScroller.isFinished()) {
post(new Runnable() {
@Override
public void run() {
requestLayout();
}
});
}
}
private void fillList(final int dx) {
int edge = 0;
View child = getChildAt(getChildCount() - 1);
if (child != null) {
edge = child.getRight();
}
fillListRight(edge, dx);
edge = 0;
child = getChildAt(0);
if (child != null) {
edge = child.getLeft();
}
fillListLeft(edge, dx);
}
private void fillListRight(int rightEdge, final int dx) {
while (rightEdge + dx < getWidth()
&& mRightViewIndex < mAdapter.getCount()) {
View child = mAdapter.getView(mRightViewIndex,
(View) mRemovedViewQueue.poll(), this);
addAndMeasureChild(child, -1);
rightEdge += child.getMeasuredWidth();
if (mRightViewIndex == mAdapter.getCount() - 1) {
mMaxX = mCurrentX + rightEdge - getWidth();
}
if (mMaxX < 0) {
mMaxX = 0;
}
mRightViewIndex++;
}
}
private void fillListLeft(int leftEdge, final int dx) {
while (leftEdge + dx > 0 && mLeftViewIndex >= 0) {
View child = mAdapter.getView(mLeftViewIndex,
(View) mRemovedViewQueue.poll(), this);
addAndMeasureChild(child, 0);
leftEdge -= child.getMeasuredWidth();
mLeftViewIndex--;
mDisplayOffset -= child.getMeasuredWidth();
}
}
/*
* private void removeNonVisibleItems(final int dx) { View child =
* getChildAt(0); while(child != null && child.getRight() + dx <= 0) {
* mDisplayOffset += child.getMeasuredWidth();
* mRemovedViewQueue.offer(child); removeViewInLayout(child);
* mLeftViewIndex++; child = getChildAt(0);
*
* }
*
* child = getChildAt(getChildCount()-1); while(child != null &&
* child.getLeft() + dx >= getWidth()) { mRemovedViewQueue.offer(child);
* removeViewInLayout(child); mRightViewIndex--; child =
* getChildAt(getChildCount()-1); } }
*/
private void positionItems(final int dx) {
if (getChildCount() > 0) {
mDisplayOffset += dx;
int left = mDisplayOffset;
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
int childWidth = child.getMeasuredWidth();
child.layout(left, 0, left + childWidth,
child.getMeasuredHeight());
left += childWidth;
}
}
}
public synchronized void scrollTo(int x) {
mScroller.startScroll(mNextX, 0, x - mNextX, 0);
requestLayout();
}
public synchronized void fullScroll(int x) {
mScroller.startScroll(mNextX, 0, x - mNextX, 0);
requestLayout();
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
boolean handled = super.dispatchTouchEvent(ev);
handled |= mGesture.onTouchEvent(ev);
return handled;
}
protected boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
synchronized (HorizontalListView.this) {
mScroller.fling(mNextX, 0, (int) -velocityX, 0, 0, mMaxX, 0, 0);
}
requestLayout();
return true;
}
protected boolean onDown(MotionEvent e) {
mScroller.forceFinished(true);
return true;
}
private OnGestureListener mOnGesture = new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onDown(MotionEvent e) {
return HorizontalListView.this.onDown(e);
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
return HorizontalListView.this.onFling(e1, e2, velocityX, velocityY);
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
synchronized (HorizontalListView.this) {
mNextX += (int) distanceX;
}
requestLayout();
return true;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (isEventWithinView(e, child)) {
if (mOnItemClicked != null) {
mOnItemClicked.onItemClick(HorizontalListView.this, child,
mLeftViewIndex + 1 + i,
mAdapter.getItemId(mLeftViewIndex + 1 + i));
}
if (mOnItemSelected != null) {
mOnItemSelected.onItemSelected(HorizontalListView.this,
child, mLeftViewIndex + 1 + i,
mAdapter.getItemId(mLeftViewIndex + 1 + i));
}
break;
}
}
return true;
}
@Override
public void onLongPress(MotionEvent e) {
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (isEventWithinView(e, child)) {
if (mOnItemLongClicked != null) {
mOnItemLongClicked.onItemLongClick(HorizontalListView.this,
child, mLeftViewIndex + 1 + i,
mAdapter.getItemId(mLeftViewIndex + 1 + i));
}
break;
}
}
}
private boolean isEventWithinView(MotionEvent e, View child) {
Rect viewRect = new Rect();
int[] childPosition = new int[2];
child.getLocationOnScreen(childPosition);
int left = childPosition[0];
int right = left + child.getWidth();
int top = childPosition[1];
int bottom = top + child.getHeight();
viewRect.set(left, top, right, bottom);
return viewRect.contains((int) e.getRawX(), (int) e.getRawY());
}
};
}
package.com.example；
导入java.util.LinkedList；
导入java.util.Queue；
导入android.content.Context；
导入android.database.DataSetObserver；
导入android.graphics.Rect；
导入android.util.AttributeSet；
导入android.util.Log；
导入android.view.GestureDetector；
导入android.view.GestureDetector.OnTestureListener；
导入android.view.MotionEvent；
导入android.view.view；
导入android.widget.AdapterView；
导入android.widget.ListAdapter；
导入android.widget.Scroller；
公共类HorizontalListView扩展了AdapterView{
公共布尔值mAlwaysOverrideTouch=true；
保护列表适配器mAdapter；
private int mLeftViewIndex=-1；
private int mRightViewIndex=0；
受保护的int-mCurrentX；
受保护的int mNextX；
private int mMaxX=Integer.MAX_值；
私有整数mDisplayOffset=0；
保护滚轮；
私人手势；
私有队列mRemovedViewQueue=新链接列表（）；
private OnItemSelectedListener监视项Selected；
私人监听
package com.example;
import java.util.LinkedList;
import java.util.Queue;
import android.content.Context;
import android.database.DataSetObserver;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.Scroller;
public class HorizontalListView extends AdapterView<ListAdapter> {
public boolean mAlwaysOverrideTouch = true;
protected ListAdapter mAdapter;
private int mLeftViewIndex = -1;
private int mRightViewIndex = 0;
protected int mCurrentX;
protected int mNextX;
private int mMaxX = Integer.MAX_VALUE;
private int mDisplayOffset = 0;
protected Scroller mScroller;
private GestureDetector mGesture;
private Queue mRemovedViewQueue = new LinkedList();
private OnItemSelectedListener mOnItemSelected;
private OnItemClickListener mOnItemClicked;
private OnItemLongClickListener mOnItemLongClicked;
private boolean mDataChanged = false;
private int mCurrentlySelectedAdapterIndex;
public HorizontalListView(Context context, AttributeSet attrs) {
super(context, attrs);
initView();
}
private synchronized void initView() {
mLeftViewIndex = -1;
mRightViewIndex = 0;
mDisplayOffset = 0;
mCurrentX = 0;
mNextX = 0;
mMaxX = Integer.MAX_VALUE;
mScroller = new Scroller(getContext());
mGesture = new GestureDetector(getContext(), mOnGesture);
}
@Override
public void setOnItemSelectedListener(
AdapterView.OnItemSelectedListener listener) {
mOnItemSelected = listener;
}
@Override
public void setOnItemClickListener(AdapterView.OnItemClickListener listener) {
mOnItemClicked = listener;
}
@Override
public void setOnItemLongClickListener(
AdapterView.OnItemLongClickListener listener) {
mOnItemLongClicked = listener;
}
@Override
protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld) {
super.onSizeChanged(xNew, yNew, xOld, yOld);
setSelection(getCount());
}
private DataSetObserver mDataObserver = new DataSetObserver() {
@Override
public void onChanged() {
synchronized (HorizontalListView.this) {
mDataChanged = true;
}
invalidate();
requestLayout();
}
@Override
public void onInvalidated() {
reset();
invalidate();
requestLayout();
}
};
@Override
public ListAdapter getAdapter() {
return mAdapter;
}
@Override
public View getSelectedView() {
// TODO: implement
// return null;
return getChild(mCurrentlySelectedAdapterIndex);
}
private View getChild(int adapterIndex) {
if (adapterIndex >= mLeftViewIndex && adapterIndex <= mRightViewIndex) {
Log.v("", "last item pos "+(adapterIndex - mLeftViewIndex));
getChildAt(adapterIndex - mLeftViewIndex);
}
return getChildAt(adapterIndex - mLeftViewIndex);
}
@Override
public void setAdapter(ListAdapter adapter) {
if (mAdapter != null) {
mAdapter.unregisterDataSetObserver(mDataObserver);
}
mAdapter = adapter;
mAdapter.registerDataSetObserver(mDataObserver);
reset();
}
private synchronized void reset() {
initView();
removeAllViewsInLayout();
requestLayout();
}
@Override
public void setSelection(int position) {
// TODO: implement
mCurrentlySelectedAdapterIndex = position;
getChild(mCurrentlySelectedAdapterIndex);
// getSelectedView();
// mCurrentlySelectedAdapterIndex = position
}
private void addAndMeasureChild(final View child, int viewPos) {
LayoutParams params = child.getLayoutParams();
if (params == null) {
params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
}
addViewInLayout(child, viewPos, params, true);
child.measure(
MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST),
MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST));
}
@Override
protected synchronized void onLayout(boolean changed, int left, int top,
int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (mAdapter == null) {
return;
}
if (mDataChanged) {
int oldCurrentX = mCurrentX;
initView();
removeAllViewsInLayout();
mNextX = oldCurrentX;
mDataChanged = false;
}
if (mScroller.computeScrollOffset()) {
int scrollx = mScroller.getCurrX();
mNextX = scrollx;
}
if (mNextX <= 0) {
mNextX = 0;
mScroller.forceFinished(true);
}
if (mNextX >= mMaxX) {
mNextX = mMaxX;
mScroller.forceFinished(true);
}
int dx = mCurrentX - mNextX;
// removeNonVisibleItems(dx);
fillList(dx);
positionItems(dx);
mCurrentX = mNextX;
if (!mScroller.isFinished()) {
post(new Runnable() {
@Override
public void run() {
requestLayout();
}
});
}
}
private void fillList(final int dx) {
int edge = 0;
View child = getChildAt(getChildCount() - 1);
if (child != null) {
edge = child.getRight();
}
fillListRight(edge, dx);
edge = 0;
child = getChildAt(0);
if (child != null) {
edge = child.getLeft();
}
fillListLeft(edge, dx);
}
private void fillListRight(int rightEdge, final int dx) {
while (rightEdge + dx < getWidth()
&& mRightViewIndex < mAdapter.getCount()) {
View child = mAdapter.getView(mRightViewIndex,
(View) mRemovedViewQueue.poll(), this);
addAndMeasureChild(child, -1);
rightEdge += child.getMeasuredWidth();
if (mRightViewIndex == mAdapter.getCount() - 1) {
mMaxX = mCurrentX + rightEdge - getWidth();
}
if (mMaxX < 0) {
mMaxX = 0;
}
mRightViewIndex++;
}
}
private void fillListLeft(int leftEdge, final int dx) {
while (leftEdge + dx > 0 && mLeftViewIndex >= 0) {
View child = mAdapter.getView(mLeftViewIndex,
(View) mRemovedViewQueue.poll(), this);
addAndMeasureChild(child, 0);
leftEdge -= child.getMeasuredWidth();
mLeftViewIndex--;
mDisplayOffset -= child.getMeasuredWidth();
}
}
/*
* private void removeNonVisibleItems(final int dx) { View child =
* getChildAt(0); while(child != null && child.getRight() + dx <= 0) {
* mDisplayOffset += child.getMeasuredWidth();
* mRemovedViewQueue.offer(child); removeViewInLayout(child);
* mLeftViewIndex++; child = getChildAt(0);
*
* }
*
* child = getChildAt(getChildCount()-1); while(child != null &&
* child.getLeft() + dx >= getWidth()) { mRemovedViewQueue.offer(child);
* removeViewInLayout(child); mRightViewIndex--; child =
* getChildAt(getChildCount()-1); } }
*/
private void positionItems(final int dx) {
if (getChildCount() > 0) {
mDisplayOffset += dx;
int left = mDisplayOffset;
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
int childWidth = child.getMeasuredWidth();
child.layout(left, 0, left + childWidth,
child.getMeasuredHeight());
left += childWidth;
}
}
}
public synchronized void scrollTo(int x) {
mScroller.startScroll(mNextX, 0, x - mNextX, 0);
requestLayout();
}
public synchronized void fullScroll(int x) {
mScroller.startScroll(mNextX, 0, x - mNextX, 0);
requestLayout();
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
boolean handled = super.dispatchTouchEvent(ev);
handled |= mGesture.onTouchEvent(ev);
return handled;
}
protected boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
synchronized (HorizontalListView.this) {
mScroller.fling(mNextX, 0, (int) -velocityX, 0, 0, mMaxX, 0, 0);
}
requestLayout();
return true;
}
protected boolean onDown(MotionEvent e) {
mScroller.forceFinished(true);
return true;
}
private OnGestureListener mOnGesture = new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onDown(MotionEvent e) {
return HorizontalListView.this.onDown(e);
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
return HorizontalListView.this.onFling(e1, e2, velocityX, velocityY);
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
synchronized (HorizontalListView.this) {
mNextX += (int) distanceX;
}
requestLayout();
return true;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (isEventWithinView(e, child)) {
if (mOnItemClicked != null) {
mOnItemClicked.onItemClick(HorizontalListView.this, child,
mLeftViewIndex + 1 + i,
mAdapter.getItemId(mLeftViewIndex + 1 + i));
}
if (mOnItemSelected != null) {
mOnItemSelected.onItemSelected(HorizontalListView.this,
child, mLeftViewIndex + 1 + i,
mAdapter.getItemId(mLeftViewIndex + 1 + i));
}
break;
}
}
return true;
}
@Override
public void onLongPress(MotionEvent e) {
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (isEventWithinView(e, child)) {
if (mOnItemLongClicked != null) {
mOnItemLongClicked.onItemLongClick(HorizontalListView.this,
child, mLeftViewIndex + 1 + i,
mAdapter.getItemId(mLeftViewIndex + 1 + i));
}
break;
}
}
}
private boolean isEventWithinView(MotionEvent e, View child) {
Rect viewRect = new Rect();
int[] childPosition = new int[2];
child.getLocationOnScreen(childPosition);
int left = childPosition[0];
int right = left + child.getWidth();
int top = childPosition[1];
int bottom = top + child.getHeight();
viewRect.set(left, top, right, bottom);
return viewRect.contains((int) e.getRawX(), (int) e.getRawY());
}
};
}
private HorizontalListView gallery;
private GalleryAdapter adapterGallery;
private ArrayList<Integer> arrayListPic;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery_activity);
gallery =(HorizontalListView)findViewById(R.id.gallery);
arrayListPic = new ArrayList<Integer>();
arrayListPic.add(R.drawable.test1);
arrayListPic.add(R.drawable.test2);
adapterGallery = new GalleryAdapter(his, arrayListPic);
gallery.setAdapter(adapterGallery);
}
package com.example.adapter;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import com.americos.hammer.R;
import com.americos.hammer.constants.HammerConstant;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
public class GalleryAdapter extends BaseAdapter {
private Context context;
private ArrayList<Integer> arrayList;
private LayoutInflater inflater;
public GalleryAdapter(Context context, ArrayList<Integer> arrayList) {
this.context = context;
this.arrayList = arrayList;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
View rowView = convertView;
if (rowView == null) {
rowView = inflater.inflate(R.layout.conversion_gallery_row_item, null);
holder = new ViewHolder();
holder.imgDisplay = (ImageView) rowView.findViewById(R.id.view_conver_gallery_img);
rowView.setTag(holder);
} else {
holder = (ViewHolder) rowView.getTag();
}
holder.imgDisplay.setImageResource(arrayList.get(position))
return rowView;
}
static class ViewHolder {
ImageView imgDisplay;
}
}