I really need help, Listview which I used in my app is very slow while scrolling how can I fix it ? I reduce the images, use viewholder but nothing change..
I am beginner in android : )
also get this message : I/Choreographer: Skipped 32 frames! The application may be doing too much work on its main thread.
Here is my code
public class asker extends Activity {
ListView list;
String[] askerbaslik;
int[] images =
{R.drawable.barbar_icon, R.drawable.okcu_icon,
R.drawable.dev_icon,
R.drawable.goblin_icon,
R.drawable.duvar_kirici_icon, R.drawable.balon_icon,
R.drawable.buyucu_icon, R.drawable.sifaci_icon,
R.drawable.ejderha_icon,
R.drawable.pekka_icon, R.drawable.yavruejder_icon, R.drawable.madenci_icon};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview);
Resources res = getResources();
askerbaslik = res.getStringArray(R.array.asker_adlari);
list = (ListView) findViewById(R.id.listview);
ilyasadapter adapter = new ilyasadapter(this, askerbaslik, images);
list.setAdapter(adapter);
}
class ilyasadapter extends ArrayAdapter<String> {
Context context;
int[] images;
String[] titlearray;
ilyasadapter(Context c, String[] titles, int imgs[]) {
super(c, R.layout.liste_tasarim, R.id.asker_baslik, titles);
this.context = c;
this.images = imgs;
this.titlearray = titles;
}
class MyViewHolder {
TextView mytitle;
ImageView myimage;
MyViewHolder(View v) {
mytitle = (TextView) v.findViewById(R.id.asker_baslik);
myimage = (ImageView) v.findViewById(R.id.asker_icon);
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
MyViewHolder holder = null;
if (row == null) {
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.liste_tasarim, parent, false);
holder = new MyViewHolder(row);
row.setTag(holder);
Log.d("test", "creating a new row");
} else {
holder = (MyViewHolder) row.getTag();
Log.d("test", "Recycling stuff");
}
holder.myimage.setImageResource(images[position]);
holder.mytitle.setText(titlearray[position]);
return row;
}
}
}
Single row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_marginTop="5dp"
android:id="#+id/asker_icon"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#drawable/barbar_icon"
android:background="#drawable/rounded_corner"
></ImageView>
<TextView
android:id="#+id/asker_baslik"
android:layout_marginTop="40dp"
android:layout_marginLeft="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Asker ismi"
android:textColor="#ffffff"
android:textSize="15dp"
android:fontFamily="sans-serif"
/>
</LinearLayout>
my listview
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#455A64" >
<ListView
android:id="#+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="#263238"
android:dividerHeight="2px"
/>
</RelativeLayout>
Please try to remove the icons from the listview and see if that improves performance. You may be using images with too high of a resolution. I too have noticed performance anomalies when using high-resolution images.
Let me know if that helps. If not, there are a few other things that we can try.
Related
Im trying to implement a RecyclingView that contains a CardView which contains a GridView. Not getting any errors just nothing is showing. Just a white screen when I try to run the app.
public class MainActivity extends AppCompatActivity {
TextView mWeatherTemp, mWeatherDescript;
RecyclerView.Adapter adapter;
Context context;
GridView gridView;
String[] mTime = {
"1:00",
"2:00",
"3:00",
"4:00",
"5:00",
"6:00",
"7:00",
"8:00",
"9:00",
"10:00",
"11:00",
};
String[] mDegreeTemp = {
"8°",
"12°",
"43°",
"100°",
"32°",
"12°",
"58°",
"39°",
"29°",
"86°",
"70°",
};
int[] imageId = {
R.mipmap.ic_launcher
};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
Toolbar mToolbar = (Toolbar) findViewById(R.id.mMainToolbar);
setSupportActionBar(mToolbar);
mToolbar.setBackgroundColor(ContextCompat.getColor(this, R.color.weather_cool));
mWeatherTemp = (TextView) findViewById(R.id.tvWeatherTemp);
mWeatherDescript = (TextView) findViewById(R.id.tvWeatherText);
Typeface robotDisplay3 = Typeface.createFromAsset(getApplicationContext().getAssets(),
"font/Roboto-Regular.ttf");
mWeatherTemp.setTypeface(robotDisplay3);
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.mHourlyRV);
HourlyGridAdapter adapter = new HourlyGridAdapter(getApplicationContext(), mTime, mDegreeTemp, imageId);
gridView = (GridView) findViewById(R.id.hourlyGridView);
gridView.setAdapter(adapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.settings, menu);
return super.onCreateOptionsMenu(menu);
}
}
public class HourlyGridAdapter extends BaseAdapter {
private Context mContext;
private String[] mTime;
private String[] mDegreeTemp;
private final int[] imageId;
public HourlyGridAdapter(Context context, String[] mTime, String[] mDegreeTemp, int[] imageId) {
mContext = context;
this.imageId = imageId;
this.mDegreeTemp = mDegreeTemp;
this.mTime = mTime;
}
#Override
public int getCount() {
return 0;
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = inflater.inflate(R.layout.hourly_single, null, false);
holder = new ViewHolder();
holder.timeText = (TextView) convertView.findViewById(R.id.timePlaceHolder);
holder.degreeText = (TextView) convertView.findViewById(R.id.degreePlaceHolder);
holder.weatherImage = (ImageView) convertView.findViewById(R.id.weatherIconHolder);
holder.timeText.setText(mTime[position]);
holder.degreeText.setText(mDegreeTemp[position]);
holder.weatherImage.setImageResource(imageId[position]);
} else {
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}
static class ViewHolder {
TextView timeText, degreeText;
ImageView weatherImage;
}
}
Layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
card_view:cardCornerRadius="6dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/tvDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TODAY" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/forecast_card_divider" />
<GridView
android:id="#+id/hourlyGridView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:horizontalSpacing="12dp"
android:numColumns="4"
android:verticalSpacing="12dp" />
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/timePlaceHolder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/timePlaceHolderText"
android:layout_gravity="center"/>
<ImageView
android:id="#+id/weatherIconHolder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/ic_launcher"
android:layout_gravity="center"/>
<TextView
android:id="#+id/degreePlaceHolder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="12°"
android:layout_gravity="center"/>
</LinearLayout>
Im not even sure if having a GridView inside a CardView all inside a recycled view is possible. Any help trying to create this would be creately appreicated.
PS. I know im not calling recyclerView thats declared as that doesnt work and does crash the app and the GridView is null. Not really sure what to do here. Not sure if I need to create an adapter for the recyclerview as all the textViews and ImageView is in the grid not the cardview.
You are initializing and setting adapter for gridview which is inside each item of recyclerview not in recycler adapter but in activity. Consider removing all gridview-related code to recyclerview's adapter.
This question already has answers here:
Custom Adapter getView() method is not called
(6 answers)
Closed 7 years ago.
the image is not showing , the app is launching but no image is dispalying , can you help me to fix that ? I guess problem with gridimage. plesae not that the place holder of picasso is not showing in the list view.
public class GridViewAdapter extends ArrayAdapter<GridImages> {
private Context mContext;
private int layoutResourceId;
private ArrayList<GridImages> mGridImages = new ArrayList<GridImages>();
public GridViewAdapter(Context mContext, int layoutResourceId, ArrayList<GridImages> mGridImages) {
super(mContext, layoutResourceId, mGridImages);
this.layoutResourceId = layoutResourceId;
this.mContext = mContext;
this.mGridImages = mGridImages;
}
/**
* Updates grid data and refresh grid items.
* #param mGridData
*/
public void setGridData(ArrayList<GridImages> mGridImages) {
this.mGridImages = mGridImages;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null){
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
convertView = inflater.inflate(layoutResourceId, parent, false);
holder.imageView = (ImageView)convertView.findViewById(R.id.grid_item_image);
holder.titleTextView = (TextView)convertView.findViewById(R.id.grid_item_title);
convertView.setTag(holder);
}
else{
holder = (ViewHolder) convertView.getTag();
}
String url = "http://www.justedhak.comlu.com/images/uploaded_images.jpg";
Picasso.with(mContext)
.load(url)
.placeholder(R.drawable.ic_launcher)
.error(R.drawable.ic_launcher)
.noFade().resize(150,150)
.centerCrop()
.into(holder.imageView);
return convertView;
}
static class ViewHolder {
TextView titleTextView;
ImageView imageView;
}
}
this is main activity.
public class MainActivity extends ActionBarActivity {
GridViewAdapter mGridAdapter;
private ArrayList<GridImages> mGridImages;
private ListView listView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list1);
mGridImages = new ArrayList<>();
mGridAdapter = new GridViewAdapter(this, R.layout.grid_item_layout, mGridImages);
listView.setAdapter(mGridAdapter);
}
activity main
<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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.justedhak.MainActivity" >
<ListView
android:id="#+id/list1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:columnWidth="100dp"
android:drawSelectorOnTop="true"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp"
android:focusable="true"
android:clickable="true"/>
</RelativeLayout>
grid item layout
<ImageView
android:id="#+id/grid_item_image"
android:layout_width="500dp"
android:layout_height="500dp"
/>
<TextView
android:id="#+id/grid_item_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:gravity="center"
android:maxLines="2"
android:layout_below="#+id/grid_item_image"
android:ellipsize="marquee"
android:textSize="12sp" />
</RelativeLayout>
Check your layout once.
try to put the specific height for image view and see.
If you didn't succeed add you layout code.
I have successfully implemented Spinners in my project using the Spinner class which exists in this link:
How to make an Android Spinner with initial text "Select One"
Also, I customized the layout of each item and named it as spinner_entries_style.xml ..
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical" >
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="2dp"
android:background="#640c1c"
android:maxEms="10"
android:padding="10dp"
android:singleLine="false"
android:textColor="#d7a801"
android:textSize="18sp" />
</LinearLayout>
Also, These are the Adapter classes I used in my code..
class LoanTypeAdapter extends ArrayAdapter<String> {
Context context;
String[] items;
public LoanTypeAdapter(Context context, String[] items) {
super(context, R.layout.spinner_entries_style, R.id.textView, items);
this.context = context;
this.items = items;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
ViewHolder holder = null;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(android.R.layout.simple_spinner_item,
parent, false);
holder = new ViewHolder(view);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
holder.textView.setText(items[position]);
holder.textView.setTextColor(Color.parseColor("#d7a801"));
holder.textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
holder.textView.setSingleLine(true);
return holder.textView;
// ------------------------------------------
}
class ViewHolder {
final TextView textView;
ViewHolder(View view) {
textView = (TextView) view;
}
}
}
And this..
class LoanProgramAdapter extends ArrayAdapter<String> {
Context context;
String[] items;
public LoanProgramAdapter(Context context, String[] items) {
super(context, R.layout.spinner_entries_style, R.id.textView, items);
this.context = context;
this.items = items;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
ViewHolder holder = null;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(android.R.layout.simple_spinner_item,
parent, false);
holder = new ViewHolder(view);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
holder.textView.setText(items[position]);
holder.textView.setTextColor(Color.parseColor("#d7a801"));
holder.textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
holder.textView.setSingleLine(true);
return holder.textView;
}
class ViewHolder {
final TextView textView;
ViewHolder(View view) {
textView = (TextView) view;
}
}
}
But, there is something strange I encountered after building the spinners. When running the app in Android versions (4.2 or less), there is a white space below the dropdown list.
Here are the screenshots of what happens..
http://www.mediafire.com/view/cqj51t8e3aju18m/01.png
http://www.mediafire.com/view/ure788yetrt00v3/02.png
That is not just on the emulator, but also in the real devices having Android 4.2 or less. Also, this white space seems a bit bigger in some devices.
Is there any idea to hide or kill these white area? Any solution for this problem?
I found the solution of this problem after reading this post.
How to wrap lengthy text in a spinner
In my layout called spinner_entries_style.xml, I should specify the height of text view like that:
android:layout_height="?android:attr/listPreferredItemHeight"
And it will be like that:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical" >
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:layout_marginBottom="2dp"
android:background="#640c1c"
android:maxEms="10"
android:padding="10dp"
android:singleLine="false"
android:textColor="#d7a801"
android:textSize="18sp" />
</LinearLayout>
That solved my problem successfully..
Remove this line from spinner_entries_style.xml.
android:layout_marginBottom="2dp"
I created this class called GeoArea, which is suppose to store "Geographical Area" that have children Geographical Areas, this is fairly strait foward:
public class GeoArea {
public String id;
public String name;
public List<GeoArea> subGeoAreas;
public GeoArea parentGeoArea;
public GeoArea(String id) {
this.id = id;
name = id;
subGeoAreas = new LinkedList<GeoArea>();
}
#Override
public String toString() {
return name;
}
}
I have created the following Layout to render it on Android, the idea here is to for each GeoArea to recursively render it self and then it's children GeoArea in a listView:
//layout_geo_area.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/txtGeoAreaName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:gravity="left"
android:text="Geo Area Name"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ListView
android:id="#+id/listViewChildGeoAreas"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/txtGeoAreaName"
android:gravity="left" >
</ListView>
</RelativeLayout>
This is my adapter I created for GeoArea to be displayed in a listView:
public class AdapterGeoArea extends ArrayAdapter<GeoArea>{
private ArrayList<GeoArea> _myGeoArea;
private Context _myContext;
LayoutInflater _inflater;
public AdapterGeoArea(Context context, ArrayList<GeoArea> myGeoArea) {
super(context, 0, myGeoArea);
_myGeoArea = myGeoArea;
_inflater = LayoutInflater.from(context);
_myContext = context;
}
public int getCount() {
return _myGeoArea.size();
}
public View getView(int position, View convertView, ViewGroup parent) {
GeoAreaLayoutHolder holder;
if (convertView == null) {
convertView = _inflater.inflate(R.layout.layout_geo_area,parent,false);
holder = new GeoAreaLayoutHolder();
holder.txtGeoAreaName = (TextView)convertView.findViewById(R.id.txtGeoAreaName);
holder.txtGeoAreaName.setTag(convertView);
holder.listViewChildGeoAreas = (ListView)convertView.findViewById(R.id.listViewChildGeoAreas);
holder.listViewChildGeoAreas.setTag(convertView);
} else {
holder = (GeoAreaLayoutHolder) convertView.getTag();
}
GeoArea curGeoArea = _myGeoArea.get(position);
holder.txtGeoAreaName.setText(curGeoArea.name);
if(curGeoArea.subGeoAreas.size()>0){
ArrayList<GeoArea> testList = new ArrayList<GeoArea>();
AdapterGeoArea adapter = new AdapterGeoArea(_myContext, testList);
for(GeoArea childGeoArea:curGeoArea.subGeoAreas){
testList.add(childGeoArea);
}
holder.listViewChildGeoAreas.setAdapter(adapter);
}
return convertView;
}
static class GeoAreaLayoutHolder {
public TextView txtGeoAreaName;
public ListView listViewChildGeoAreas;
}
}
And here is my Activity that I am using to set it all up:
public class ActivityGeoAreas extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_geo_area);
GeoArea.searchTerm = "Bar & Grill";
GeoArea torontoArea = new GeoArea("cityOfToronto");
ArrayList<GeoArea> testList = new ArrayList<GeoArea>();
testList.add(torontoArea);
AdapterGeoArea adapter = new AdapterGeoArea(this, testList);
ListView lv = (ListView) findViewById(R.id.listViewChildGeoAreas);
lv.setAdapter(adapter);
}
}
When I try to run it, I get the error nullPointerException on the line:
holder.txtGeoAreaName.setText(curGeoArea.name);
What am I doing wrong?
You may want to check ExpandableListView may suit your needs better
http://developer.android.com/reference/android/widget/ExpandableListView.html
An example # http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/
Continuing from my previous answer to your question ( i though that solved your problem)
To display just name in your listview
list_row.xml // this is the layout with textview to be inflated in getView.
Each row will have textview
<?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/textGeoArea"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="14dp"
android:text="Choose Area"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
layout_geo_area.xml // with only listview no textview
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="#+id/listViewChildGeoAreas"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:gravity="left" >
</ListView>
</RelativeLayout>
Now your adapter class
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_row,parent,false);
// inflate list_row.xml with textview
holder = new ViewHolder();
holder.tv = (TextView)convertView.findViewById(R.id.textGeoArea);
holder.setTag(convertView);
}
else {
holder = (ViewHolder) convertView.getTag();
}
GeoArea curGeoArea = _myGeoArea.get(position);
holder.tv.setText(curGeoArea.name);
return convertView;
}
static class ViewHolder // use a view holder for smooth scrolling an performance
{
TextView tv;
}
You have a custom adapter.
public class AdapterGeoArea extends ArrayAdapter<GeoArea>{
Now you set the adapter to listview like below
AdapterGeoArea adapter = new AdapterGeoArea(this, testList);
ListView lv = (ListView) findViewById(R.id.listViewChildGeoAreas);
lv.setAdapter(adapter);
So why do you need the below. remove these
if(curGeoArea.subGeoAreas.size()>0){
ArrayList<GeoArea> testList = new ArrayList<GeoArea>();
AdapterGeoArea adapter = new AdapterGeoArea(_myContext, testList);
for(GeoArea childGeoArea:curGeoArea.subGeoAreas){
testList.add(childGeoArea);
}
holder.listViewChildGeoAreas.setAdapter(adapter);
I have an android activity with a gridview, each cell contains a textview with a single character (so there are around 60-70 characters/cells on the screen at a time). The scrolling of the gridview is unacceptably slow and unsmooth. I tried replacing the gridview with a listview, and the scrolling of the listview is much faster. How can i speed this up?
The activity layout is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical" >
<GridView
android:id="#+id/gridView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="56dp"
android:numColumns="auto_fit" >
</GridView>
</LinearLayout>
And inside each cell is this layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="40sp" />
</LinearLayout>
And the code for the activity is:
public class TestGridActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid_activity);
GridView gridView = (GridView) findViewById(R.id.gridView1);
ArrayList<Map<String, String>> list = getData();
SimpleAdapter arrayAdapter = new SimpleAdapter(this, list,
R.layout.grid_layout, new String[] { "literal"},
new int[] { R.id.textView1});
gridView.setAdapter(arrayAdapter);
}
}
edit: pks asking to post adapter code, the above code I have used a generic simpleAdapter, but i have tried a custom view, which didn't help.
public class GridAdapter extends BaseAdapter {
private Context context;
private ArrayList<Map<String, String>> list;
private LayoutInflater inflater;
public static class ViewHolder {
TextView textView1;
int position;
}
public GridAdapter(Context c, ArrayList<Map<String, String>> l) {
context = c;
list = l;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return list.size();
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null){
convertView = inflater.inflate(R.layout.grid_layout, null);
holder = new ViewHolder();
holder.textView1 = (TextView) convertView.findViewById(R.id.textView1);
holder.position = position;
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textView1.setText(list.get(position).get("character"));
return convertView;
}
}
I've also tried creating all the views in advance, and that didn't help scrolling speed.