How to display Toast in Android

Question

I have a slider that can be pulled up and then it shows a map  I can move the slider up and down to hide or show the map  When the map is on front  I can handle touch events on that map  Everytime I touch  a AsyncTask is fired up  it downloads some data and makes a Toast that displays the data  Although I start the task on touch event no toast is displayed  not till I close the slider  When the slider is closed and the map is not displayed anymore the Toast appears   Any ideas   Well start the task  EDIT   public boolean onTouchEvent MotionEvent event  MapView mapView        if  event getAction      1            new TestTask this  execute            return true                   else          return false             and in onPostExecute make a toast  Toast makeText app getBaseContext    String data result                   Toast LENGTH SHORT  show      In new TestTask this   this is a reference to MapOverlay and not to MapActivity  so this was the problem

User · Answer

I have tried several toast and for those whom their toast is giving them error try  Toast makeText getApplicationContext     google   Toast LENGTH LONG  show

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Extending activity using baseadapter used this  Toast makeText getActivity          Your Message   Toast LENGTH LONG  show      or if you are using activity or mainactivity  Toast makeText MainActivity this        Your Message   Toast LENGTH LONG  show

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If it s fragment   Toast makeText getActivity     this is my Toast message                            Toast LENGTH LONG  show

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If you want to write a simple toast in your activity  Toast makeText getApplicationContext    Hello  Toast LENGTH SHORT  show     1 Showing TextView in Toast ---  TextView tv   new TextView this   tv setText  Hello     tv setTextSize 30   tv setTextColor Color RED   tv setBackgroundColor Color YELLOW    2 Showing Image as Toast --  ImageView iv   new ImageView this   iv setImageResource R drawable blonde   Toast t   new Toast this   t setView iv   t setDuration Toast LENGTH LONG   t show     3 showing Layout as Toast --  LayoutInflater li   getLayoutInflater    View view   li inflate R layout my toast layout null false   Toast t   new Toast this   t setView view   t setDuration Toast LENGTH LONG   t show        If you want to write the toast in your Async then  private Activity activity  private android content Context context  this activity   activity  this context   context  Toast makeText context   Hello   Toast LENGTH SHORT  show

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Simplest way   To Display In Your Main Activity  replace First Argument for other activity   Button setOnClickListener new View OnClickListener         Override     public void onClick View v           Toast makeText MainActivity this  Toast Message  Toast LENGTH SHORT  show

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Here s another one   refreshBtn setOnClickListener new View OnClickListener                  Override             public void onClick View v                    Toast makeText getBaseContext   getText R string refresh btn pushed  Toast LENGTH LONG  show                                Where Toast is   Toast makeText getBaseContext   getText R string refresh btn pushed  Toast LENGTH LONG  show      amp  strings xml    lt string name  refresh btn pushed  gt  Refresh was Clicked     lt  string gt

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Toast toast Toast makeText getApplicationContext    Hello   Toast LENGTH SHORT    toast setGravity Gravity CENTER  0  0      last two args are X and Y are used for setting position  toast setDuration 10000    you can even use milliseconds to display toast  toast show       showing the toast is important

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In order to display Toast in your application  try this   Toast makeText getActivity     String data result      Toast LENGTH LONG  show      Another example   Toast makeText getActivity     This is my Toast message       Toast LENGTH LONG  show      We can define two constants for duration      int   LENGTH LONG Show the view or text notification for a long period   of time       int   LENGTH SHORT    Show the view or text notification for a short period   of time    Customizing your toast  LayoutInflater myInflater   LayoutInflater from this   View view   myInflater inflate R layout your custom layout  null   Toast mytoast   new Toast this   mytoast setView view   mytoast setDuration Toast LENGTH LONG   mytoast show

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To toast in Android  Toast makeText MainActivity this   YOUR MESSAGE   LENGTH SHORT  show      or  Toast makeText MainActivity this   YOUR MESSAGE   LENGTH LONG  show        LENGTH SHORT and LENGTH LONG are acting as boolean flags - which means you cant sent toast timer to miliseconds  but you need to use either of those 2 options

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Must read  Android Toast Example  Syntax  Toast makeText context  text  duration     You can use getApplicationContext   or getActivity   or MainActivity this if Activity Name is MainActivity   Toast makeText getApplicationContext    Hi I am toast  Toast LENGTH LONG  show      or   Toast makeText MainActivity this  Hi I am Toast   Toast LENGTH LONG  show

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Toast makeText app getBaseContext    your string  Toast LENGTH SHORT  show      instead of using  app getBaseContext        You can try using  getApplicationContext    or  getContext        If your code is in activity then you should use  this  of  Activty this   If your code is in fragment then you should go for  getActivity

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There are two ways to do it   Either use the inbuilt Toast message     Toast shown for  short period of time  Toast makeText getApplicationContext     Toast Message   Toast LENGTH SHORT  show       Toast shown for long period of time Toast makeText getApplicationContext     Toast Message   Toast LENGTH LONG  show      or make a custom one by providing custom layout file  Toast myToast   new Toast getApplicationContext     myToast setGravity Gravity CENTER VERTICAL  0  0   myToast setDuration Toast LENGTH LONG   myToast setView myLayout   myToast show

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Simple Way toast  quot Your Message quot   OR toast R string some message  Just add two methods in your BaseActivity  Or create new BaseActivity if you are not already using  public class BaseActivity extends AppCompatActivity       public void toast String msg            Toast makeText this  msg  Toast LENGTH SHORT  show               public void toast  StringRes int msg            Toast makeText this  msg  Toast LENGTH SHORT  show             and extend all your activities by BaseActivity  public class MainActivity extends BaseActivity

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Inside Fragments  onCreateView   Toast makeText getActivity     your message    Toast LENGTH LONG  show     Inside Classes  onCreate   Toast makeText myClassName this   your message    Toast LENGTH LONG  show

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Show Toast from Service public class ServiceA extends Service                  public void showToast final String message            Handler handler   new Handler Looper getMainLooper             handler post new Runnable                   Override             public void run                     Toast makeText getContext    message  Toast LENGTH LONG  show                                                  You can also put showToast method in your Application class  and show toast from anywhere

User · Answer

I ran across the answers here  and was attracted by the fact that there seems to be someone poking around  believing that an Activity context is required   This is not the case   However  it is a requirement that a Toast is posted from the main event or UI Thread   So  getting this to work outside of an activity context is a little bit tricky   Here is an example that would work inside of a system service  or any potential class that ultimately inherits from Context   public class MyService extends AccessibilityService        public void postToastMessage final String message            Handler handler   new Handler Looper getMainLooper              handler post new Runnable                   Override             public void run                     Toast makeText getApplicationContext    message  Toast LENGTH LONG  show                                        Note that we do not need access to an instance of Activity for this to work   Please stop suggesting this is the case   If Activity were required  the method signature wouldn t call for a Context

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For displaying Toast use the following code   Toast toast   new Toast getApplicationContext      toast setGravity Gravity CENTER VERTICAL  0  0    toast setDuration Toast LENGTH LONG    toast show

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Syntax  Toast makeText context  text  duration       Parameter Value  context     getApplicationContext   - Returns the context for all activities running in application       getBaseContext   -  If you want to access Context from another context within  application you can access       getContext   - Returns the context view only current running activity    text     text - Return  STRING    If not string you can use type cast      string num      type caste   duration     Toast LENGTH SHORT - Toast delay 2000 ms predefined      Toast LENGTH LONG  - Toast delay 3500 ms predefined      milisecond  - Toast delay user defined miliseconds  eg  4000      Example 1  Toast makeText getApplicationContext     STRING MESSAGE   Toast LENGTH LONG  show      Example 2  Toast makeText getApplicationContext     STRING MESSAGE   5000  show

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The Getting Started Way  Toast makeText this   Hello World   Toast LENGTH SHORT  show

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This worked for me   Toast makeText getBaseContext     your text here    Toast LENGTH SHORT   show

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You can customize your tost   LayoutInflater mInflater LayoutInflater from this    View view mInflater inflate R layout your layout file null   Toast toast new Toast this   toast setView view   toast setDuration Toast LENGTH LONG   toast show      Or General way   Toast makeText context  Your message    Toast LENGTH LONG  show

[android] How to display Toast in Android?

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