how to present a toast when a widget is clicked?

问题:

I need to do a simple widget that presents a Toast when clicking on it. My problem is that I cant find how to get or create an "oncreate" action. i see the examples with the pending intent that opens the web browser. But how do i simply create this: Toast.makeText(context, "activated", Toast.LENGTH_LONG).show(); and make it happen every time a user clicks on the widget? just to be clear, I mean a widget on the launcher of the phone. not a regular "button" widget etc...

public class Widget extends AppWidgetProvider {
NotificationManager mNotificationManager;
Notification notification;

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    super.onUpdate(context, appWidgetManager, appWidgetIds);



    appWidgetManager.updateAppWidget(appWidgetIds, view);
}

}

Thanks!

回答1:

Just call Toast.makeText(context, "activated", Toast.LENGTH_LONG).show(); in widget's onClick() method of View.OnClickListener

Update:

If you use AppWidgetProvider so check this and this one posts

回答2:

I think you are missing to show the created Toast. For example:

Toast.makeText(context, "activated", Toast.LENGTH_LONG).show();

Moreover, override the onClick method of your custom View class and pop the toast there.

---

public class TestButton extends Button {

    public TestButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void setOnClickListener(OnClickListener l) {
        super.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(v.getContext(), "activated", Toast.LENGTH_LONG)
                  .show();
            }
        });
    }

}

回答3:

Button btn=(Button) findViewById(R.id.button);

            btn.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View arg0) {
                   Toast.makeText(context, "activated", Toast.LENGTH_LONG).show();


  }
}
});

回答4:

this may helps , here need to pass context and get Onclick Event with your widget

Toast.makeText(context, "activated", Toast.LENGTH_LONG).show();

回答5:

Try this:

button = (Button) findViewById(R.id.buttonToast);

        button.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {

        // Create a piece of toast.
        Toast pieceToast = Toast.makeText(getApplicationContext(), "Test Message", Toast.LENGTH_SHORT);

        // Show the toast.
        pieceToast.show();
    }

This is my BroadcastReciever Class:

public class IncomingCallReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();
        if(null == bundle)
            return;
        Log.i("IncomingCallReceiver",bundle.toString());
        String state = bundle.getString(TelephonyManager.EXTRA_STATE);
        String registredPhoneNumber;
        Log.i("IncomingCallReceiver","State: "+ state);
        String phonenumber = bundle.getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
        System.out.println("*****Mobile Ringing*******"+phonenumber);
        if(state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_RINGING))
        {
            registredPhoneNumber = PreferenceConnector.getPhoneNumber(context);
            System.out.println("registredPhoneNumber:  "+registredPhoneNumber);
            System.out.println("phonenumber:   "+phonenumber);
            Log.i("IncomingCallReceiver","Incomng Number: " + phonenumber);
            if(phonenumber.equals(registredPhoneNumber)){
                System.out.println("Entered...");
                String info = "Detect Calls sample application\nIncoming number: " + phonenumber;
                if(isMyServiceRunning(context)){
                    context.stopService(new Intent(context,com.visiomaticamericas.visitormobile.services.LaunchServiceActivity.class));
                    System.out.println("******Service Stopped*********");
                }
                Intent i = new Intent(context,com.services.LaunchServiceActivity.class);
                i.putExtra("delay",500L);
                context.startService(i);
                System.out.println("*****Service Started*****");
                Toast.makeText(context, info, Toast.LENGTH_LONG).show();
            }

        }
    }


}

Here, I called my activity class.. and I did my widget design in My activity class..

回答6:

folks my VS environment is VS 2017 with Xamarin .

   private void DisplayMessage(string DisplayMsgText)
    {
        Toast.MakeText(this.ApplicationContext, DisplayMsgText, ToastLength.Short).Show();
    }

and use this function to show message at device screen like below:

DisplayMessage("Vibrate button pressed");