LISTVIEW gets refresh and change the value while scroling issue(SOLVED)

First of all main.xml file will be like below:


<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"
    tools:context=".MainActivity" >
    <ListView
        android:id="@+id/list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
         />
</RelativeLayout>

Row file for the inflator is as below.



<?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:orientation="vertical" >
    <SeekBar
        android:id="@+id/seekBar1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:max="100"/>
    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="horizontal">
        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="click to see row number" />
        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0" />
    </LinearLayout>
</LinearLayout>




Now the class in the activity should be like this.... See the getview method for the logic of not refreshing the list view after scrolling :


public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

ListView lv = (ListView) findViewById(R.id.list);
lv.setAdapter(new ListAdapter(MainActivity.this));
}

private class ListAdapter extends BaseAdapter {
private Context con;
private int size = 20;
private int s[] = new int[20];

public ListAdapter(MainActivity mainActivity) {
// TODO Auto-generated constructor stub
this.con = mainActivity;
for (int i = 0; i < size; i++) {
s[i] = 0;
}

}

@Override
public int getCount() {
// TODO Auto-generated method stub
return size;
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public View getView(final int position, View convertView,ViewGroup parent) {
// TODO Auto-generated method stub
LayoutInflater inflater = LayoutInflater.from(this.con);
View View = inflater.inflate(R.layout.list_row, null);
SeekBar seekbar = (SeekBar) View.findViewById(R.id.seekBar1);
Button btnrow = (Button) View.findViewById(R.id.button1);
final Button btnseek = (Button) View.findViewById(R.id.button2);

seekbar.setProgress(s[position]);
btnseek.setText("" + s[position]);

seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
btnseek.setText("" + progress);
s[position] = progress;

}
});

return View;
}

}

Get all the application installed on your system

First of all add the xml for the list of the application installed on your devices.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    xmlns:android1="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent" >

    <ListView

        android1:id="@+id/listView1"

        android1:layout_width="match_parent"

        android1:layout_height="wrap_content"

        android1:layout_alignParentLeft="true"

        android1:layout_alignParentTop="true" >

    </ListView>

</RelativeLayout>

Here is the code for the row of the list.

<?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"

    android:orientation="vertical" >

    <ImageView

        android:id="@+id/imageView1"

        android:layout_width="50dp"

        android:layout_height="50dp"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginLeft="17dp"

        android:layout_marginTop="22dp"

       />

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBottom="@+id/imageView1"

        android:layout_marginLeft="36dp"

        android:layout_toRightOf="@+id/imageView1"

        android:text="TextView" />

</RelativeLayout>

Now after that add the following code in your main activity.


public class MainActivity extends Activity {

ArrayList<PInfo> arrylist;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
PInfo p = new PInfo();

arrylist = getPackages();

for (int i = 0; i < arrylist.size(); i++) {
Log.i("log_tag", "=======" + arrylist.get(i).icon);
}

ListView l = (ListView) findViewById(R.id.listView1);

l.setAdapter(new ListAdatp(this, arrylist));

}

class PInfo {
private String appname = "";
private String pname = "";
private String versionName = "";
private int versionCode = 0;
private String move2sd;
private Drawable icon;

private void prettyPrint() {
Log.v(appname + "\t" + pname + "\t" + versionName + "\t"
+ versionCode, "");
}

}

private ArrayList<PInfo> getPackages() {
ArrayList<PInfo> apps = getInstalledApps(false); /*
* false = no system
* packages
*/

final int max = apps.size();
for (int i = 0; i < max; i++) {
apps.get(i).prettyPrint();

}
return apps;

}

private ArrayList<PInfo> getInstalledApps(boolean getSysPackages) {
ArrayList<PInfo> res = new ArrayList<PInfo>();
List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
for (int i = 0; i < packs.size(); i++) {
PackageInfo p = packs.get(i);
if ((!getSysPackages) && (p.versionName == null)) {
continue;
}
PInfo newInfo = new PInfo();
newInfo.appname = p.applicationInfo.loadLabel(getPackageManager())
.toString();
newInfo.pname = p.packageName;
newInfo.versionName = p.versionName;
newInfo.versionCode = p.versionCode;
newInfo.icon = p.applicationInfo.loadIcon(getPackageManager());

res.add(newInfo);
}
return res;
}

public class ListAdatp extends BaseAdapter {

Activity ativity;
ArrayList<PInfo> adptarrlist;

public ListAdatp(MainActivity mainActivity, ArrayList<PInfo> arrylist) {

// TODO Auto-generated constructor stub
ativity = mainActivity;
adptarrlist = arrylist;

}

@Override
public int getCount() {
// TODO Auto-generated method stub
return adptarrlist.size();
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public View getView(final int position, View convertView,
ViewGroup parent) {
// TODO Auto-generated method stub

LayoutInflater inflt = (LayoutInflater) ativity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

convertView = inflt.inflate(R.layout.listrow, null);

ImageView img = (ImageView) convertView
.findViewById(R.id.imageView1);
TextView txt = (TextView) convertView.findViewById(R.id.textView1);
img.setBackgroundDrawable(adptarrlist.get(position).icon);
txt.setText("(" + adptarrlist.get(position).appname + ")  "
+ adptarrlist.get(position).pname);

txt.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

Intent LaunchIntent = getPackageManager()
.getLaunchIntentForPackage(
adptarrlist.get(position).pname);
startActivity(LaunchIntent);
}
});

return convertView;
}

}

}