Develop Reference

Android How can I change image on gridview by position?

I have a slide puzzle game.
I want to change image on GridView by position(id).
How could I do that?

Try this
gridView.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3)
{
// You can get position of item or imageView and again you can set new image
// by setBackGround() by getting this position
}
});

OnClick Listner of images in Grid View Android

I have a Grid View that have 4 images .So i want to identify which image has been clicked so that corresponding to that i can start a new activity .
So please help me how can i get this
I have tried this
dataView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
}
});

getView can be used for this purpose.for this in getView find View and apply onClicklistner their.to make all views clickable you need to setFocusable(false) on all focusable views.

I have got the solution
dataView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View v, int arg2,
long arg3) {
// TODO Auto-generated method stub
Toast.makeText(
getApplicationContext(),
links[arg2], Toast.LENGTH_SHORT).show();
}
});

int arg2 in the OnItemClick method specifies the position.Using that you can get the item clicked.

Highlight current touched item as selected item

I have a android file explorer application and I need to highlight the selected item. I could select touched items using v.setBackgroundColor() method inside onListItemClick(). But when I touch another file/folder still previous one highlighted. I need only current touched item display as selected. How to do this?

not perfect but works good
loop through all items of list and try something like this
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
for (int i = 0; i < arg0.getCount(); i++) {
View view = arg0.getChildAt(i);
if (i == arg2) {
view.setBackgroundColor(Color.RED);
} else {
view.setBackgroundColor(Color.GREEN);
}
}
}
});

How to change background color of xml by using spinner

I want to change the color of XML based on the value selected in the spinner. Here is the code that i had tried.
public class MainActivity extends Activity implements OnItemClickListener{
Spinner obj;
String[] str={"Red","Green","Yellow","Gray"};
ArrayAdapter<String> adapter;
ViewGroup vg;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
obj=(Spinner)findViewById(R.id.spinner);
vg=(ViewGroup)findViewById(R.id.relative);
adapter=new ArrayAdapter<String>(getBaseContext(),android.R.
layout.simple_dropdown_item_1line,str);
obj.setAdapter(adapter);
obj.setOnItemClickListener(this);
}
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
String color=obj.getSelectedItem().toString();
if(color=="Red")
{
}
}
}
Iam trying to use setBackground method but it gives me error

Try below code!
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
String color=str[arg2]; //where arg2 is position of selected item
if(color=="Red")
{
View someView = findViewById(R.id.randomViewInMainLayout);
// Find the root view
View root = someView.getRootView()
// Set the color
root.setBackgroundColor(Color.RED);
}
}

Make sure the xml has a relative layout, or any main layout. On Item selected call, get the layout, and use setbackground(getResources().getColor(R.color.color_name_here).
Hope that helps.!

get the id og your main layout like
Yourlayout(linear or realtive) layout = (Yourlayout)findviewbyid(R.id.yourlayoutid);
on on click of spinner
if(color=="Red")
{
layout.setbackground(getResources().getColor(R.color.color_name_here);
}

How to show the focus able slider image of android

I am a android developer and i want to develop an application. In this app, i want to show a gallery image slider.In this slider ,the focus able image see should large and place to middle point and other image see should be small to same bellow picture.
I also try the below code .It is also show the large focus able image but not same .
gallery.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Log.d("position", "" + arg3);
ProductByCategoryData productByCategoryData = AllProductByCategoryData
.getAllProductByCategoryData(arg2);
Constant.producdata = productByCategoryData;
Intent i = new Intent(ModeltypeActivity.this, OrderDetailInformation.class);
startActivity(i);
}
});
gallery.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
if (lastSelectedView != null)
{
lastSelectedView.setLayoutParams(new Gallery.LayoutParams(
lowLavelWidth, lowtLavelheight));// 150, 200//100, 150
}
arg1.setLayoutParams(new Gallery.LayoutParams(heighLavelWidth, heightLavelheight));// 220,
// 315//150, 200
lastSelectedView = arg1;
int vectorPosition = arg2;
ProductByCategoryData product = AllProductByCategoryData
.getAllProductByCategoryData(vectorPosition);
product_name.setText(product.getProduct_name());
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
Now how to show the gallery slider image same to above image.please help to me.It is Possibel ?