So ändern Sie Hintergrundfarbe, wenn Sie klicken Sie auf Horizontaler Listview-Elemente in Android
So ändern Sie die Hintergrundfarbe, die beim Klick auf Horizontaler Listview-Elemente in Android
So dass die Nutzer wissen, wo Sie geklickt haben.
Unten ist der code was ich von einigen internet-site.
HorizontalListViewActivity.java
public class HorizontalListViewActivity extends Activity {
static BitmapFactory bf;
ArrayList<String> dataObjectsList = new ArrayList<String>();
ArrayList<Bitmap> myImageList = new ArrayList<Bitmap>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
HorizontalListView listview = (HorizontalListView) findViewById(R.id.listview);
listview.setAdapter(mAdapter);
dataObjectsList.add("Text #1");
dataObjectsList.add("Text #2");
dataObjectsList.add("Text #3");
dataObjectsList.add("Text #4");
myImageList.add(BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/Restaurent/app1.jpg"));
myImageList.add(BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/Restaurent/app2.jpg"));
myImageList.add(BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/Restaurent/app3.jpg"));
myImageList.add(BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/Restaurent/app4.jpg"));
listview.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
//TODO Auto-generated method stub
/*Toast.makeText(getApplicationContext(), "dataObjects[position]=="+dataObjectsList.get(arg2).toString(), 100).show();
Intent intent2 = new Intent(getApplicationContext(),Test.class);
intent2.putExtra("category", dataObjectsList.get(arg2).toString());
startActivity(intent2);*/
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
//TODO Auto-generated method stub
}
});
}
private static String[] dataObjects = new String[]{ "Delhi",
"Bangalore",
"Chennai",
"Pune" };
private static Bitmap[] myImage = new Bitmap[]{ BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/Restaurent/app1.jpg"),
BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/City/app2.jpg"),
BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/City/app3.jpg"),
BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getPath()+"/City/app4.jpg") };
private BaseAdapter mAdapter = new BaseAdapter() {
@Override
public int getCount() {
return dataObjects.length;
}
@Override
public Object getItem(int position) {
Toast.makeText(getApplicationContext(), "getItem 111111 position=="+position, 100).show();
return null;
}
@Override
public long getItemId(int position) {
Toast.makeText(getApplicationContext(), "getItemId position=="+position, 100).show();
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View retval = LayoutInflater.from(parent.getContext()).inflate(R.layout.viewitem, null);
TextView title = (TextView) retval.findViewById(R.id.title);
ImageView img=(ImageView) retval.findViewById(R.id.image);
img.setImageBitmap(myImageList.get(position));
title.setText(dataObjectsList.get(position).toString());
return retval;
}
};
}
HorizontalListView.java
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<View> mRemovedViewQueue = new LinkedList<View>();
private OnItemSelectedListener mOnItemSelected;
private OnItemClickListener mOnItemClicked;
private OnItemLongClickListener mOnItemLongClicked;
private boolean mDataChanged = false;
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;
}
private DataSetObserver mDataObserver = new DataSetObserver() {
@Override
public void onChanged() {
synchronized(HorizontalListView.this){
mDataChanged = true;
}
setEmptyView(getEmptyView());
invalidate();
requestLayout();
}
@Override
public void onInvalidated() {
reset();
invalidate();
requestLayout();
}
};
@Override
public ListAdapter getAdapter() {
return mAdapter;
}
@Override
public View getSelectedView() {
//TODO: implement
return null;
}
@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
}
private void addAndMeasureChild(final View child, int viewPos) {
LayoutParams params = child.getLayoutParams();
if(params == null) {
params = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
}
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, 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, 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();
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
boolean 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) {
getParent().requestDisallowInterceptTouchEvent(true);
synchronized(HorizontalListView.this){
mNextX += (int)distanceX;
}
requestLayout();
return true;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
Rect viewRect = new Rect();
for(int i=0;i<getChildCount();i++){
View child = getChildAt(i);
int left = child.getLeft();
int right = child.getRight();
int top = child.getTop();
int bottom = child.getBottom();
viewRect.set(left, top, right, bottom);
if(viewRect.contains((int)e.getX(), (int)e.getY())){
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) {
Rect viewRect = new Rect();
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
int left = child.getLeft();
int right = child.getRight();
int top = child.getTop();
int bottom = child.getBottom();
viewRect.set(left, top, right, bottom);
if (viewRect.contains((int) e.getX(), (int) e.getY())) {
if (mOnItemLongClicked != null) {
mOnItemLongClicked.onItemLongClick(HorizontalListView.this, child, mLeftViewIndex + 1 + i, mAdapter.getItemId(mLeftViewIndex + 1 + i));
}
break;
}
}
}
};
}
viewitem.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#fff">
<ImageView
android:id="@+id/image"
android:layout_width="145dp"
android:layout_height="145dp"
android:layout_marginTop="5dp"
android:scaleType="centerCrop"
android:src="@drawable/ic_launcher"
/>
<TextView
android:id="@+id/title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#000"
android:text="text"
android:gravity="center_horizontal"
/>
</LinearLayout>
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#fff"
android:orientation="vertical" >
<com.horilistview.HorizontalListView
android:id="@+id/listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#ddd" />
</LinearLayout>
- Haben Sie versuchen, eine Auswahl als hintergrund auf Ihrem viewitem.xml? Dieser Beitrag kann Ihnen helfen: stackoverflow.com/questions/5371719/...
- Danke, ja habe ich versucht aber es funktioniert nicht.
- mögliche Duplikate von Horizontaler ListView in Android?
InformationsquelleAutor FAIZ ANWAR | 2014-03-20
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Beispielsweise in diese Implementierung, die Sie verwenden können
listSelector
- Eigenschaft in der xml. Schauen Sie sich vielleicht bei Ihnen unterstützt auch ähnliche Eigenschaft oder verwenden Sie die eine, die ich weiter oben verlinkt.Fügen Sie diesen code in
onitemSelectListner
dies funktioniert ab 3.0 und höher version..
fügen Sie das onclick-listener in der getview-Methode..
test ist ein dummy-array, so verwenden Sie es out-of-onclicklistner zu halten die gewählten auch, wenn die Ansicht geändert wird.. so..