Android Toast reports Activity context. this cannot be resolved to a variable, toastcontext. this

Android Toast reports Activity context. this cannot be resolved to a variable, toastcontext. this

For android development, I insert a button in my activity. If the andriod market cannot be found, I will use toast for prompts. Some problems occurred while using it. The following code reports an error.Context cannot be resolved to a variable

1234567

Uri uri = Uri.parse("market://details?id=" + getApplicationContext().getPackageName());Intent goToMarket = new Intent(Intent.ACTION_VIEW, uri);try {    startActivity(goToMarket);} catch (ActivityNotFoundException e) {    Toast.makeText(Activity.this, "Couldn't launch the market", Toast.LENGTH_LONG).show();}

I tried the following call:

Toast. makeText (this, "Couldn't launch the market", Toast. LENGTH_LONG). show ();
Then The development tool prompts the method makeText (Context, CharSequence, int) in the type Toast is not applicable for The arguments (new View. OnClickListener () {}, String, int)

I used to use it this way, but I don't understand how it works.

Solution

 

If you inherit the Activity, use the following two methods:
Toast. makeText (ClassName. this, "Couldn't launch the market", Toast. LENGTH_LONG). show ();
Or
Toast. makeText (getApplicationContext (), "Couldn't launch the market", Toast. LENGTH_LONG). show ();

If your class inherits Fragment, use the following method:
Toast. makeText (getActivity (), "Couldn't launch market", Toast. LENGTH_LONG). show ();

 

Address: http://www.itmmd.com/201411/153.html
This article is organized and published by Meng IT personnel. The reprinted article must indicate the source.