I made an expandable list like the one in this link: http://www.techienjoy.com/android-expandable-list-dynamically-created-example.php, but I want to make the child to look in vertical not horizontal.
I only have 1 xml with:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ExpandableListView android:id="#android:id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:groupIndicator="#null"/>
Everything else is in the class. How can I set them vertical?
My java code is the same one in the link.
Please have a look at this Example. Hope this will help you.
public class ExpandListViewActivity extends ExpandableListActivity
{
/**
* strings for group elements
*/
static final String arrGroupelements[] =
{
"India",
"Australia",
"England",
"South Africa"
};
/**
* strings for child elements
*/
static final String arrChildelements[][] =
{
{
"Sachin Tendulkar",
"Raina",
"Dhoni",
"Yuvi"
},
{
"Ponting",
"Adam Gilchrist",
"Michael Clarke"
},
{
"Andrew Strauss",
"kevin Peterson",
"Nasser Hussain"
},
{
"Graeme Smith",
"AB de villiers",
"Jacques Kallis"
}
};
static final int arrChildelementsim[][] =
{
{
R.drawable.ic_launcher,
R.drawable.aqua,
R.drawable.pin_red,
R.drawable.aqua,
},
{
R.drawable.ic_launcher,
R.drawable.ic_launcher,
R.drawable.ic_launcher,
},
{
R.drawable.ic_launcher,
R.drawable.ic_launcher,
R.drawable.ic_launcher,
},
{
R.drawable.ic_launcher,
R.drawable.ic_launcher,
R.drawable.ic_launcher,
}
};
DisplayMetrics metrics;
int width;
ExpandableListView expList;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
expList = getExpandableListView();
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
width = metrics.widthPixels;
//this code for adjusting the group indicator into right side of the view
expList.setIndicatorBounds(width - GetDipsFromPixel(50), width - GetDipsFromPixel(10));
expList.setAdapter(new ExpAdapter(this));
expList.setOnGroupExpandListener(new OnGroupExpandListener()
{
#Override
public void onGroupExpand(int groupPosition)
{
Log.e("onGroupExpand", "OK");
}
});
expList.setOnGroupCollapseListener(new OnGroupCollapseListener()
{
#Override
public void onGroupCollapse(int groupPosition)
{
Log.e("onGroupCollapse", "OK");
}
});
expList.setOnChildClickListener(new OnChildClickListener()
{
#Override
public boolean onChildClick(ExpandableListView arg0, View arg1, int arg2,
int arg3, long arg4) {
Log.e("OnChildClickListener", "OK");
// TODO Auto-generated method stub
return false;
}
});
}
public int GetDipsFromPixel(float pixels)
{
// Get the screen's density scale
final float scale = getResources().getDisplayMetrics().density;
// Convert the dps to pixels, based on density scale
return (int) (pixels * scale + 0.5f);
}
public class ExpAdapter extends BaseExpandableListAdapter {
private Context myContext;
public ExpAdapter(Context context) {
myContext = context;
}
#Override
public Object getChild(int groupPosition, int childPosition) {
return null;
}
#Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
#Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.child_row, null);
}
TextView tvPlayerName = (TextView) convertView.findViewById(R.id.tvPlayerName);
ImageView tvPlayerimage = (ImageView) convertView.findViewById(R.id.tvPlayerImage);
tvPlayerName.setText(arrChildelements[groupPosition][childPosition]);
tvPlayerimage.setImageResource(arrChildelementsim[groupPosition][childPosition]);
return convertView;
}
#Override
public int getChildrenCount(int groupPosition) {
return arrChildelements[groupPosition].length;
}
#Override
public Object getGroup(int groupPosition) {
return null;
}
#Override
public int getGroupCount() {
return arrGroupelements.length;
}
#Override
public long getGroupId(int groupPosition) {
return 0;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.group_row, null);
}
TextView tvGroupName = (TextView) convertView.findViewById(R.id.tvGroupName);
tvGroupName.setText(arrGroupelements[groupPosition]);
return convertView;
}
#Override
public boolean hasStableIds() {
return false;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
}
Child_row.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:gravity="center_vertical"
android:orientation="horizontal" >
<ImageView
android:id="#+id/tvPlayerImage"
android:layout_width="wrap_content"
android:layout_height="30dip"
android:gravity="center_vertical"
android:layout_marginLeft="50dip"
>
</ImageView>
<TextView
android:id="#+id/tvPlayerName"
android:layout_width="wrap_content"
android:layout_height="30dip"
android:gravity="center_vertical"
android:layout_marginLeft="10dip"
android:textSize="14sp" >
</TextView>
</LinearLayout>
group_row.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:orientation="vertical" >
<TextView
android:id="#+id/tvGroupName"
android:layout_width="wrap_content"
android:layout_height="40dip"
android:gravity="center_vertical"
android:paddingLeft="30dip"
android:textSize="16sp"
android:textStyle="bold"
>
</TextView>
</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:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello" />
<ExpandableListView
android:id="#+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:groupIndicator="#drawable/group_indicator" >
<TextView
android:id="#+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="hello" >
</TextView>
</ExpandableListView>
</LinearLayout>
Related
Please assist me with implementing MP Line Chart in ListView; it works good in recycler view, however it loses its size as I add more than 5 items.
Because of the scroll view, I'm using an expanded listView to reduce issues, yet the chart looks like this.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_margin="10sp"
android:orientation="vertical"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textStyle="bold"
android:textColor="#color/black"
android:text="#string/most_active_stocks"/>
<LinearLayout
android:visibility="visible"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center"
android:gravity="center"
android:layout_margin="10sp">
<Button
android:layout_width="wrap_content"
android:textSize="10sp"
android:layout_gravity="center"
android:layout_height="40dp"
android:layout_margin="5dp"
android:background="#drawable/virtualtrading_button"
android:text="Volume"
android:gravity="center"
android:textColor="#color/black" />
<Button
android:layout_width="wrap_content"
android:layout_height="40dp"
android:textSize="10sp"
android:layout_gravity="center"
android:layout_margin="5dp"
android:background="#drawable/virtualtrading_button"
android:text="%Turnover"
android:gravity="center"
android:textColor="#color/black" />
<Button
android:layout_width="wrap_content"
android:layout_height="40dp"
android:textSize="10sp"
android:layout_margin="5dp"
android:layout_gravity="center"
android:background="#drawable/virtualtrading_button"
android:text="Range"
android:gravity="center"
android:textColor="#color/black" />
</LinearLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.catalyst.maksl.Components.ExpandableHeightListView
android:id="#+id/moverlist"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:drawSelectorOnTop="false"
android:fadingEdge="vertical"
android:divider="#android:color/transparent"
android:dividerHeight="5dp"
android:fitsSystemWindows="true"
android:listSelector="#00000000"
android:scrollbars="none"
android:smoothScrollbar="true" />
</RelativeLayout>
</LinearLayout>
ExpandableListView Class
public class ExpandableHeightListView extends ListView {
boolean expanded = false;
public ExpandableHeightListView(Context context)
{
super(context);
}
public ExpandableHeightListView(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public ExpandableHeightListView(Context context, AttributeSet attrs,int defStyle)
{
super(context, attrs, defStyle);
}
public boolean isExpanded()
{
return expanded;
}
#Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// HACK! TAKE THAT ANDROID!
if (isExpanded())
{
// Calculate entire height by providing a very large height hint.
// But do not use the highest 2 bits of this integer; those are
// reserved for the MeasureSpec mode.
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
ViewGroup.LayoutParams params = getLayoutParams();
params.height = getMeasuredHeight();
}
else
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public void setExpanded(boolean expanded)
{
this.expanded = expanded;
}
}
adapter class :
public class MostActiveStocksAdapter extends BaseAdapter {
private static LineDataSet set1;
public static Drawable drawablePositive = ContextCompat.getDrawable(Logs.globalContext, R.drawable.graph_green_bg);
public static Drawable drawable_negative = ContextCompat.getDrawable(Logs.globalContext, R.drawable.graph_bg);
Context context;
private Double changePercentage;
ArrayList<String> arrayList = new ArrayList<String>();
LayoutInflater mInflater = null;
private ViewHolder holder;
public ArrayList<Entry> values;
public LineData data;
public MostActiveStocksAdapter(Context context, ArrayList<String> arrayList) {
this.context = context;
this.arrayList = arrayList;
mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return arrayList.size();
}
#Override
public Object getItem(int position) {
return arrayList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.most_active_stocks_listitem, null);
holder = new ViewHolder();
holder.moverSymbolName = (TextView) convertView.findViewById(R.id.moversymbolName);
holder.moverScripName = (AutoResizeTextView) convertView.findViewById(R.id.moversmainSymbolName);
holder.moverLastTradePrice = (TextView) convertView.findViewById(R.id.moverslastTradePrice);
holder.moverchange = (AutoResizeTextView) convertView.findViewById(R.id.moversindexChange);
holder.moverMarket = (TextView) convertView.findViewById(R.id.moverssymbolMarket);
holder.sector = convertView.findViewById(R.id.movertextSector);
holder.nameIcon = convertView.findViewById(R.id.moverNameicon);
holder.masLineChart = convertView.findViewById(R.id.moversgraph);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
ScripBean scripBean = Logs.allScripBean.get(arrayList.get(position));
MostActiveStockMarketFeedBean marketFeedBean = Logs.mostActiveStockMarketFeedBeanHashMap.get(arrayList.get(position));
if (marketFeedBean != null) {
changePercentage = marketFeedBean.getChange() / (marketFeedBean.getLastTradePrice() - marketFeedBean.getChange()) * 100;
holder.moverScripName.setText(marketFeedBean.getScrip());
holder.moverSymbolName.setText(marketFeedBean.getScripName());
holder.sector.setText(scripBean.getSectorName());
holder.nameIcon.setText(marketFeedBean.getScrip().substring(0,1));
holder.moverLastTradePrice.setText(Logs.priceFormat.format(marketFeedBean.getLastTradePrice()).replace("-", ""));
setData(5,3);
customiseChart();
if(marketFeedBean.getChange() != 0.0) {
if (Logs.priceFormat.format(changePercentage).contains("-")) {
holder.moverLastTradePrice.setBackground(context.getResources().getDrawable(R.drawable.bg_negativecell));
}
else
{
holder.moverLastTradePrice.setBackground(context.getResources().getDrawable(R.drawable.bg_positivecell));
}
holder.moverchange.setText(marketFeedBean.getChange() + " " + "(" + Logs.priceFormat.format(changePercentage).replace("-", "") + "%)");
}
else
{
holder.moverchange.setText("(0.00%)");
}
}
else {
String sm = arrayList.get(position);
holder.moverScripName.setText(sm.split("\\:", -1)[0]);
holder.moverMarket.setText(sm.split("\\:", -1)[1]);
holder.moverSymbolName.setText("");
holder.moverLastTradePrice.setText("0.00");
holder.moverchange.setText("0.00");
}
return convertView;
}
private void setData(int count, float range) {
values = new ArrayList<>();
for (int i = 0; i < count; i++) {
float val = (float) (Math.random() * range) - 30;
values.add(new Entry(i, val));
}
set1 = new LineDataSet(values, "DataSet 1");
set1.setDrawCircles(false);
set1.setDrawFilled(true);
set1.setLineWidth(1f);
set1.setColor(Color.GREEN);
set1.setMode(LineDataSet.Mode.CUBIC_BEZIER);
set1.setDrawFilled(true);
set1.setFillDrawable(drawablePositive);
set1.setFillFormatter(new IFillFormatter() {
#Override
public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
return holder.masLineChart.getAxisLeft().getAxisMinimum();
}
});
ArrayList<ILineDataSet> dataSets = new ArrayList<>();
dataSets.add(set1);
data = new LineData(dataSets);
holder.masLineChart.setData(data);
}
private void customiseChart()
{
holder.masLineChart.getDescription().setEnabled(false);
holder.masLineChart.setDrawGridBackground(false);
holder.masLineChart.setDragEnabled(false);
holder.masLineChart.getLegend().setEnabled(false);
holder.masLineChart.setScaleEnabled(true);
holder.masLineChart.setScaleYEnabled(false);
holder.masLineChart.setScaleXEnabled(true);
holder.masLineChart.setDrawGridBackground(false);
holder.masLineChart.getXAxis().setEnabled(false);
holder.masLineChart.getLineData().setDrawValues(false);
holder.masLineChart.getXAxis().setDrawGridLines(false);
holder.masLineChart.getXAxis().setDrawAxisLine(false);
holder.masLineChart.getAxisLeft().setDrawGridLines(false);
holder.masLineChart.getAxisRight().setDrawGridLines(false);
holder.masLineChart.getAxisRight().setDrawZeroLine(true);
holder.masLineChart.getAxisLeft().setDrawZeroLine(true);
holder.masLineChart.getAxisRight().setDrawLabels(false);
holder.masLineChart.getAxisLeft().setDrawLabels(false);
holder.masLineChart.getAxisLeft().setEnabled(false);
holder.masLineChart.getAxisRight().setEnabled(true);
holder.masLineChart.getAxisRight().setZeroLineColor(Color.BLACK);
holder.masLineChart.getAxisRight().setAxisLineColor(Color.BLACK);
holder.masLineChart.setMaxHighlightDistance(150);
holder.masLineChart.setViewPortOffsets(0, 0, 0, 0);
holder.masLineChart.setTouchEnabled(false);
holder.masLineChart.setPinchZoom(false);
}
private class ViewHolder {
TextView moverSymbolName;
TextView moverMarket;
AutoResizeTextView moverScripName;
TextView moverLastTradePrice;
AutoResizeTextView moverchange;
TextView sector;
TextView nameIcon;
LineChart masLineChart;
}
P.S: this ListView is in fragment.
I have a custom dialog that has a ViewPager inside of it, when the dialog shows the ViewPager is just blank, not progressing on swipe or when pressing the "Next" button I implemented. I tried slightly altering my code and it didn't work. I saw several posts like this, but none of their solutions worked. PS if some things don't make sense or have mismatched names then that's because I renamed/removed some of the files/variables to simplify.
SliderAdapter:
public class SliderAdapter extends PagerAdapter {
private Context context;
private LayoutInflater layoutInflater;
private ArrayList<String> text;
public SliderAdapter(Context context, ArrayList<String> text) {
this.context = context;
this.text = text;
}
public String[] txtH = {
"test1",
"test2",
"test3"
};
#Override
public int getCount() {
return txtH.length;
}
#Override
public boolean isViewFromObject(#NonNull View view, #NonNull Object object) {
return view == (ConstraintLayout) object;
}
#NonNull
#Override
public Object instantiateItem(#NonNull ViewGroup container, int position) {
layoutInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.slide_layout_wr, container, false);
TextView txt1 = view.findViewById(R.id.txt11);
TextView txt2 = view.findViewById(R.id.txt22);
txt1.setText(txtH[position]);
txt2.setText(text.get(position));
container.addView(view);
return view;
}
#Override
public void destroyItem(#NonNull ViewGroup container, int position, #NonNull Object object) {
container.removeView((ConstraintLayout) object);
}
}
Dialog itself:
public class DialogWeeklyReport extends AppCompatDialogFragment {
...
#NonNull
#Override
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(),
R.style.Dialog);
LayoutInflater inflater = getActivity().getLayoutInflater();
View view = inflater.inflate(R.layout.dialog, null);
preferences = getActivity().getSharedPreferences("label", 0);
Random random = new Random();
text.add("test1");
text.add("test2");
text.add("test3");
viewPager = view.findViewById(R.id.viewPager);
dotLayout = view.findViewById(R.id.dotLayout);
next = view.findViewById(R.id.next);
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (next.getText().toString().equals("Proceed")) {
dismiss();
} else {
viewPager.setCurrentItem(currentPage + 1);
}
}
});
back = view.findViewById(R.id.back);
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
viewPager.setCurrentItem(currentPage--);
}
});
builder.setView(view)
.setCancelable(true);
addDotsIndicator(0);
viewPager.setOnPageChangeListener(viewListener);
adapter = new SliderAdapter(getActivity(), text);
return builder.create();
}
private void addDotsIndicator(int position) {
dots = new TextView[3];
dotLayout.removeAllViews();
for (int i = 0; i<dots.length; i++) {
dots[i] = new TextView(getActivity());
dots[i].setText(Html.fromHtml("•"));
dots[i].setTextSize(35);
dots[i].setTextColor(Color.parseColor("#404040"));
dotLayout.addView(dots[i]);
}
if(dots.length > 0) {
dots[position].setTextColor(Color.BLACK);
}
if (currentPage == 0) {
back.setEnabled(false);
next.setEnabled(true);
back.setText("");
next.setText("Next");
}
}
ViewPager.OnPageChangeListener viewListener = new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
addDotsIndicator(position);
currentPage = position;
if (currentPage == 0) {
back.setEnabled(false);
next.setEnabled(true);
back.setText("");
next.setText("Next");
} else if (currentPage == 1) {
back.setEnabled(true);
next.setEnabled(true);
back.setText("Back");
next.setText("Next");
} else if (currentPage == 2) {
back.setEnabled(true);
next.setEnabled(false);
back.setText("Back");
next.setText("Proceed");
}
}
#Override
public void onPageScrollStateChanged(int state) {
}
};
}
Dialog XML:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/dialog_bg"
app:cardCornerRadius="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<androidx.viewpager.widget.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:id="#+id/dotLayout"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_centerHorizontal="true"
android:layout_margin="15dp"
android:layout_below="#+id/viewPager"
android:orientation="horizontal" />
<Button
android:id="#+id/back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_below="#+id/viewPager"
android:background="#android:color/transparent"
android:elevation="0dp"
android:text="Back"
android:textColor="#android:color/black" />
<Button
android:id="#+id/next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_below="#+id/viewPager"
android:layout_margin="5dp"
android:background="#android:color/transparent"
android:elevation="0dp"
android:text="Next"
android:textColor="#android:color/black" />
</RelativeLayout>
ViewPager's slide layout:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
android:background="#android:color/white">
<TextView
android:id="#+id/txt11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TEST"
android:textColor="#android:color/black"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.24000001" />
<TextView
android:id="#+id/txt22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Test"
android:textColor="#android:color/black"
android:textSize="18sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/txt11"
app:layout_constraintStart_toStartOf="#+id/txt11"
app:layout_constraintTop_toBottomOf="#+id/txt11"
app:layout_constraintVertical_bias="0.26" />
</androidx.constraintlayout.widget.ConstraintLayout>
The problem is that you didn't set the ViewPager adapter
public class DialogWeeklyReport extends AppCompatDialogFragment {
...
#NonNull
#Override
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
...
viewPager = view.findViewById(R.id.viewPager);
...
adapter = new SliderAdapter(getActivity(), text);
viewPager.setAdapter(adapter); // <<<<<< change here
return builder.create();
}
...
Here is my test
I want Help to overlay a play icon on top of every grid item, if it contains video.Here is my Layout File of GridView. I was Trying to do, but i was not able to wire up all things.
Ps :- I am Newbie
<FrameLayout
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:padding="2dp"
tools:context="com.techx.storysaver.ImageFragment">
<GridView
android:id="#+id/grid_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:horizontalSpacing="2dp"
android:listSelector="#drawable/griditem_selector"
android:numColumns="2"
android:drawSelectorOnTop="true"
android:stretchMode="columnWidth"
android:verticalSpacing="2dp" />
</FrameLayout>
Here is my ImageAdapter
public class ImageAdapter extends BaseAdapter {
private Context context;
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Pictures";
File f = new File(path);
File file[] = f.listFiles();
public ImageAdapter(Context c) {
context = c;
}
#Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
#Override
public int getCount() {
return file.length;
}
#Override
public Object getItem(int position) {
return file[position];
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
Arrays.sort(file, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
final String path = file[position].getAbsolutePath();
CheckableLayout l;
ImageView i;
if (convertView == null) {
i = new ImageView(context);
i.setScaleType(ImageView.ScaleType.CENTER_CROP);
int widthSize = getScreenWidth();
widthSize = widthSize / 2;
widthSize = widthSize - 8;
int heightSize = getScreenHeight();
heightSize = heightSize / 3;
heightSize = heightSize - 10;
i.setLayoutParams(new ViewGroup.LayoutParams(widthSize, heightSize));
i.setPadding(8, 8, 8, 8);
l = new CheckableLayout(context);
l.setLayoutParams(new GridView.LayoutParams(GridView.LayoutParams.WRAP_CONTENT, GridView.LayoutParams.WRAP_CONTENT));
l.addView(i);
} else {
l = (CheckableLayout) convertView;
i = (ImageView) l.getChildAt(0);
}
if (path.endsWith(".jpg") || path.endsWith(".jpeg") || path.endsWith(".png")) {
Glide
.with(context)
.load(file[position])
.into(i);
}
if (path.endsWith(".mp4")) {
Glide
.with(context)
.load(file[position])
.into(i);
}
return l;
}
public class CheckableLayout extends FrameLayout implements Checkable {
private boolean mChecked;
public CheckableLayout(Context context) {
super(context);
}
#SuppressWarnings("deprecation")
public void setChecked(boolean checked) {
mChecked = checked;
setBackgroundDrawable(checked ? getResources().getDrawable(R.drawable.item_selector) : null);
}
public boolean isChecked() {
return mChecked;
}
public void toggle() {
setChecked(!mChecked);
}
}
public static int getScreenWidth() {
return Resources.getSystem().getDisplayMetrics().widthPixels;
}
public static int getScreenHeight() {
return Resources.getSystem().getDisplayMetrics().heightPixels;
}
}
1. Create an layout XML for your GridView Item.
grid_item.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/tools"
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
card_view:cardCornerRadius="4dp"
card_view:cardUseCompatPadding="false"
card_view:cardPreventCornerOverlap="false">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:scaleType="centerCrop"
android:src="#drawable/sample_1" />
<ImageView
android:id="#+id/icon_play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:src="#drawable/icon_play"/>
<TextView
android:id="#+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/image"
android:padding="8dp"
android:background="#CCFFFFFF"
android:text="This is simple title"
android:textColor="#000000" />
</RelativeLayout>
</android.support.v7.widget.CardView>
2. Use grid_item.xml from your adapter getView() method for each item:
#Override
public View getView(int pos, View convertView, ViewGroup parent)
{
Arrays.sort(file, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
final String path = file[position].getAbsolutePath();
if(convertView == null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.grid_item, null);
}
ImageView imageView = (ImageView) convertView.findViewById(R.id.image);
ImageView iconPlay= (ImageView) convertView.findViewById(R.id.icon_play);
TextView textTitle= (TextView) convertView.findViewById(R.id.title);
// Image
if (path.endsWith(".jpg") || path.endsWith(".jpeg") || path.endsWith(".png")) {
Glide
.with(context)
.load(file[position])
.into(imageView);
// Hide play icon
iconPlay.setVisibility(View.GONE);
}
// Video
if (path.endsWith(".mp4")) {
Glide
.with(context)
.load(file[position])
.into(imageView);
// Show play icon
iconPlay.setVisibility(View.VISIBLE);
}
return convertView;
}
OUTPUT:
Hope this will help~
I am trying to make custom ExpandableListView having child or node. But some parents don't have children. I don't want to show anything. In other words
I need to display like that
Parent 1
parent 2
child1
child2
child3
parent 3
parent 4
child1
So I try like this I make a xml route_dashboard.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ExpandableListView
android:id="#+id/expandableListView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
>
</ExpandableListView>
</RelativeLayout>
custom adapter
public class CustomExpendableListView extends BaseExpandableListAdapter {
private String[] fatherName={"naveen","ravi","sharma","uncle","rahat"};
String[] raviChildrenname={"abc","pqr","mnn"};
String[] sharmaChildrenname={"zxa","yh","er"};
Context context;
public CustomExpendableListView(Context context) {
this.context=context;
}
#Override
public int getGroupCount() {
return 0;
}
#Override
public int getChildrenCount(int groupPosition) {
return 0;
}
#Override
public Object getGroup(int groupPosition) {
return null;
}
#Override
public Object getChild(int groupPosition, int childPosition) {
return null;
}
#Override
public long getGroupId(int groupPosition) {
return 0;
}
#Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
#Override
public boolean hasStableIds() {
return false;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
LayoutInflater mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.parenttextview, null);
}
TextView item = (TextView) convertView.findViewById(R.id.parentTextView);
item.setText(fatherName[groupPosition]);
return item;
}
#Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
return null;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return false;
}
}
call main function
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.route_dashboard);
expendablelistView = (ExpandableListView) findViewById(R.id.expandableListView1);
adapter = new CustomExpendableListView(this);
expendablelistView.setAdapter(adapter);
}
child.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/childTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
parenttextviewxml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/parentTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
I take three array
private String[] fatherName={"naveen","ravi","sharma","uncle","rahat"};
String[] raviChildrenname={"abc","pqr","mnn"};
String[] sharmaChildrenname={"zxa","yh","er"};
fatherName is the parents nodes.raviChildrenname is the child of ravi parent node .sharmaChildrenname is the child of sharma
could you please give some code.?
Your getGroupCount method must return value greater than zero. In this case only list view will display something
Something like that:
#Override
public int getGroupCount() {
return fatherName.length;
}
#Override
public int getChildrenCount(int groupPosition) {
if (fatherName[groupPosition].equalsIgnoreCase("ravi")) {
return raviChildrenname.length;
}
if (fatherName[groupPosition].equalsIgnoreCase("sharma")) {
return sharmaChildrenname.length;
}
return 0;
}
You also need to implement getChildView method for this listView:
#Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
View convertView, ViewGroup parent) {
LayoutInflater mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.childView, null);
}
TextView item = (TextView) convertView.findViewById(R.id.childTextView);
if (fatherName[groupPosition].equalsIgnoreCase("ravi")) {
item.setText(raviChildrenname[childPosition]);
}
if (fatherName[groupPosition].equalsIgnoreCase("sharma")) {
item.setText( sharmaChildrenname[childPosition]);
}
return item;
}
I have a gridView witch contains a group of images with two columns, what I want to do is to put a title for a group of images.
Now I can do that but the problem that title is that the title is only in one column and the second column is always empty, how can I put the title in the two columns?
Here is my adapter:
public class MultimediaPhotosAdapter extends BaseAdapter {
private Context mContext;
private List<ImagesDto> imagesDto = new ArrayList<ImagesDto>();
ImagesFlickrDto imagesFlickrDto;
final String formatImage = ImagesNameFormat.FORMAT_IMAGE_DEFAULT.getImagesNameFormat();
ImagesFormatsDto currentImageFormatToDisplay;
GridView gridViewImages;
public MultimediaPhotosAdapter(Context context, GridView gridViewImages) {
this.gridViewImages = gridViewImages;
this.mContext = context;
}
#Override
public int getCount() {
return imagesDto.size();
}
#Override
public Object getItem(int position) {
return imagesDto.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View itemView = null;
HolderElementGridView holderElementGridView;
ImagesDto currentImage = imagesDto.get(position);
if(convertView == null) {
holderElementGridView = new HolderElementGridView();
itemView = View.inflate(mContext,R.layout.item_multimedia_photo,null);
holderElementGridView.image = (NetworkImageView) itemView.findViewById(R.id.imageView);
holderElementGridView.title = (TextView) itemView.findViewById(R.id.title);
itemView.setTag(holderElementGridView);
}
else {
itemView = convertView;
holderElementGridView = (HolderElementGridView)itemView.getTag();
}
if(imagesDto.get(position).isFirstElementOfCategorie()){
holderElementGridView.image.setVisibility(View.GONE);
holderElementGridView.title.setVisibility(View.VISIBLE);
holderElementGridView.title.setText(currentImage.getTitle());
}
else if(imagesDto.get(position).getUrl()!=null){
holderElementGridView.image.setVisibility(View.VISIBLE);
holderElementGridView.title.setVisibility(View.GONE);
holderElementGridView.image.setImageUrl(StringFormat.getUrlImage(mContext, currentImage.getUrl(), currentImageFormatToDisplay.getSuffix(), currentImageFormatToDisplay.getExtension()),VolleySingleton.getInstance(mContext).getImageLoader());
holderElementGridView.image.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
DrawerLayoutInterface screenInterface=(DrawerLayoutInterface)mContext;
if(screenInterface!=null)
screenInterface.showDiaporama(imagesFlickrDto,position);
}
});
}
// column near title is empty
else{
holderElementGridView.image.setVisibility(View.VISIBLE);
holderElementGridView.title.setVisibility(View.GONE);
}
return itemView;
}
public void update(ImagesFlickrDto imagesFlickrDto){
this.imagesFlickrDto = imagesFlickrDto;
this.imagesDto = imagesFlickrDto.getListImages();
AdministrerImagesSA administrerImages = new AdministrerImagesSAImpl();
currentImageFormatToDisplay = administrerImages.getFormatByProriete(imagesFlickrDto.getImagesFormatsDto(), formatImage);
}
class HolderElementGridView{
NetworkImageView image;
TextView title;
}
}
item_multimedia_photo.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:geekui="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<com.netcosports.anderlecht.activity.utils.TypefaceTextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="#dimen/text_size_item_menu"
android:visibility="gone"
android:layout_marginLeft="5dp"
geekui:customTypeface="fonts/DIN-Regular.otf" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.android.volley.toolbox.NetworkImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:src="#drawable/ic_launcher" >
</com.android.volley.toolbox.NetworkImageView>
</LinearLayout>
</LinearLayout>