CODEWITHSUNDEEP
androidandroid-layoutandroid-fragmentsandroid-viewandroid-context
Nitin Mesta
Nitin Mesta

Reputation: 1504

Get Activity Context within class which extends Application in android

Dear Folks, I am currently working on a android app where I need to show the progress dialog. I need to have a context object for this. This task I am implementing in the class which extends the application. But every time when I tried to access context object it is showing me the WindowManager.BadTokenException for this line

Dialog dialog=ProgressDialog.show(getApplicationContext(), "Status", "Downloading The master");

Please help me where I am doing wrong

Edit: Below is my code!

public class FlightStatus extends Application {
    private Context context;

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();



        SharedPreferences preference=getSharedPreferences("FlightStatus", 1);
        if(preference.getBoolean("firstLaunch", true))
            {

                try {
                    Dialog dialog=ProgressDialog.show(getApplicationContext(), "Status!", "Downloading The master!!");
                    XLSReadHelper excelReader=new XLSReadHelper(getApplicationContext());
                    //excelReader.readExcelFile(Environment.getExternalStorageDirectory()+"/UHCPAudit/cases.xls");  
                    excelReader.readExcelFile();
                    Log.d("Excel Operation ", "records read!!");
                    preference.edit().putBoolean("firstLaunch", false).commit();
                    dialog.dismiss();
                } catch (Exception e) {
                    // TODO: handle exception
                    Log.d("Excel Operation ", e.getMessage());
                }

            }
    }    
}

Upvotes: 0

Views: 173

Answers (2)

Yash Sampat
Yash Sampat

Reputation: 30611

It is incorrect to try getting Context inside Application, as no Activity is yet initialized at this stage. Instead show your dialog from Activity/Fragment.

If you are showing the progress dialog from an Activity, use:

Dialog dialog = ProgressDialog.show(MyActivity.this, "Status", "Downloading The master");

If you are showing it from a Fragment, then first add this member to your Fragment class:

private Activity activity;

Then call this in your onCreateView() method:

activity = getActivity();

and finally

Dialog dialog = ProgressDialog.show(activity, "Status", "Downloading The master");

Upvotes: 1

TmKVU
TmKVU

Reputation: 3000

You can use a constructor which takes the Activity as context

public class YourClass extends Application{
    private Activity context;

    public YourClass(Activity context){
       this.context = context;
    }
}

And then from your calling Activity:

YourClass yourClass = new YourClass(this);

You can also try to use the ProgressDialog in your Activityitself, in a method which you can call from your custom class:

public void showProgress(){
  //Your progress code
}

And in your custom class:

context.showProgress();

Upvotes: 0

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