Passing a List to another Activity in Android
I've created a list and would like to pass the list to another activity but i'm getting an error on the putExtra statement when i create the intent. Just wondering is there any easy way to pass a List of Strings rather than a single String?
Thanks
private List<String> selItemList;
private ListView mainListView = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recipes);
Button searchBtn = (Button) findViewById(R.id.searchButton);
searchBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (selItemList == null) {
Toast.makeText(getApplicationContext()," Please Make A Selection ", Toast.LENGTH_SHORT).show();
} else {
Intent intent = new Intent(Recipes2.this, XMLParser.class);
intent.putExtra("items_to_parse", selItemList);
startActivityForResult(intent, 0);
}
}
});
You can use putStringArrayListExtra
from Intent
public Intent putStringArrayListExtra (String name, ArrayList value)
private final List<String> selItemList;
private ListView mainListView = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recipes);
Button searchBtn = (Button) findViewById(R.id.searchButton);
searchBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (selItemList == null) {
Toast.makeText(Recipes2.this," Please Make A Selection ", Toast.LENGTH_SHORT).show();
} else {
Intent intent = new Intent(Recipes2.this, XMLParser.class);
intent.putStringArrayListExtra("items_to_parse", (ArrayList<String>) selItemList);
startActivityForResult(intent, 0);
}
}
});
And in your XMLParser.class:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getIntent().getExtras() != null) {
for(String a : getIntent().getExtras().getStringArrayList("items_to_parse")) {
Log.d("=======","Data " + a);
}
}
You can't pass a List in Intent.putExtras(String name, List<?> list);
.
I think you can use an Array
of String
and pass it in putExtras
like this:
private List<String> selItemList;
private ListView mainListView = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recipes);
Button searchBtn = (Button) findViewById(R.id.searchButton);
searchBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (selItemList == null) {
Toast.makeText(getApplicationContext(), "Please Make A Selection", Toast.LENGTH_SHORT).show();
} else {
String[] selItemArray = new String[selItemList.size()];
// Copy your List of Strings into the Array, and then pass it in your intent
// ....
Intent intent = new Intent(Recipes2.this, XMLParser.class);
intent.putExtra("items_to_parse", selItemArray);
startActivityForResult(intent, 0);
}
}
});
I know it is a little late and this question has an answer already but here is another way.
simply create another object define it as Serializable
and give it a list variable and send that using putExtra
on your intent
like this:
public class Category implements Serializable {
private List<YourObject> objects;
public Category() {
}
public List<YourObject> getObjects() {
return objects;
}
public void setObjects(List<YourObject> objects) {
this.objects = objects;
}
and then for sending it do this:
Category cat = new Category();
cat.setObjects(objects);
intent.putExtra("listOfObjects",cat);
startActivity(intent);
and to get the object you have created do this:
Category cat = (Category) extras.get("listOfObjects");
cat.getObjects;