I have several classes in my application. Some are Activities, Services and Pure java classes. I know i can display a Toast message from within an Activity but i’d like to display a Toast from a pure java class.
In the java class i pass a context in to the constructor but this doesn’t seem to show the toast.
I have created a method in the Application class that takes a String as an argument, hoping i could generate a Toast using the Application context, no joy here either.
How can i generate a Toast from a class that isn’t a service or Activity etc.
public class LoginValidate{
public LoginValidate(Context context) {
this.context = context;
nfcscannerapplication = (NfcScannerApplication) context
.getApplicationContext();
}
public void someMethod(){
nfcscannerapplication.showToastMessage(result);
}
}
.
///then in my Application class
public void showToastMessage(String message){
Toast.makeText(this.getApplictionContext(), "Encountered a problem with sending tag: " + message, Toast.LENGTH_LONG).show();
}
First create Application class like this..
public class ApplicationContext extends Application {
/** Instance of the current application. */
private static ApplicationContext instance;
/**
* Constructor.
*/
public ApplicationContext() {
instance = this;
}
/**
* Gets the application context.
*
* @return the application context
*/
public static Context getContext() {
if (instance == null) {
instance = new ApplicationContext();
}
return instance;
}
/**
* display toast message
*
* @param data
*/
public static void showToast(String data) {
Toast.makeText(getContext(), data,
Toast.LENGTH_SHORT).show();
}
}
call this method from any of your class like ApplicationContext.showToast("your string");
be careful about context object leaking..
Answer：
There are two ways you can do that, if you have a valid context, you can do it like @CapDroid wrote:
public static void showToastWithTitle(String title) {
Toast.makeText(getApplicationContext(), title, Toast.LENGTH_LONG).show();
}
if you don’t, you can send a Context as well,
public static void showToastWithTitleAndContext(Context context, String title) {
Toast.makeText(context, title, Toast.LENGTH_LONG).show();
}
Note that you can define a static Context in your Application.java and use it to call shoh toast.
hope that helps.
Answer：
Write this method in your Application Class. You just need to pass message in parameter from any Activity.
public void showToast(String message)
{
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
Answer：
Need to pass the context to the showToastMessage(String message)
Like this showToastMessage(String message, Context context)
//then in my Application class
public void showToastMessage(String message, Context context){
Toast.makeText(context, "Encountered a problem with sending tag: " + message, Toast.LENGTH_LONG).show();
}
Answer：
It worked for me with :
Toast.makeText(this.getContext(), R.string.title, Toast.LENGTH_LONG).show();
Answer：
Toast.makeText(getActivity(), "Index....."+index, Toast.LENGTH_LONG).show();
Tags: androidandroid, class
