Android Application Development Learning-toast use method Daquan

A Toast is a view that quickly displays a small amount of information to the user. A Toast floats on the application to display information to the user, it never gets the focus, does not affect the user's input, and so on, mainly for some help / hints.

The most common way to create a Toast is to use a static method Toast.maketext

I'm using SDK 2.2.

1. Default display mode

Java code

First parameter: The current context environment. Available Getapplicationcontext () or this//second parameter: the string to display. It's also a r.string. String ID//Third parameter: The length of time displayed. The toast default has two Length_long (long) and Length_short (short), and can also use milliseconds such as 2000ms toast Toast=toast.maketext (Getapplicationcontext (), "  Default Toast ", Toast.length_short); Show toast Information toast.show ();

2. Customizing the display location

Java code

toast toast=toast.maketext ( Getapplicationcontext (),  "Toast with custom display location",  toast.length_short);           //First parameter: Sets the location where the toast appears on the screen. My current settings are centered on top           //the second parameter: The offset of the horizontal x-axis of the toast position relative to the first parameter, Positive offset to the right and negative to the left           //the third argument: the same as the second argument for the same reason            //If you set an offset that exceeds the range of the screen, the toast will appear within the screen near the outside border            toast.setgravity (gravity.top| gravity.center, -50, 100);            //Screen Center display , the x-axis and y-axis offsets are 0          //toast.setgravity (Gravity.CENTER,  0, 0);            toast.show (); 

3. With the picture

Java code

Toast toast=toast.maketext (Getapplicationcontext (),  "show toast with pictures",  3000);           toast.setgravity (gravity.center, 0, 0);            //Creating a Picture View object            imageview imageview= new imageview (Getapplicationcontext ());           //Settings Picture            Imageview.setimageresource (R.drawable.ic_launcher);           //Get the toast layout           linearlayout toastview  =  (LinearLayout)  toast.getview ();           / /set this layout to landscape           toastview.setorientation ( Linearlayout.horizontal);           //will imageview the first position in this layout            toastview.addview (imageview, 0);           Toast.show ();

4. Fully customizable display mode

Java code

Inflater means inflatable          //layoutinflater. This class is used to instantiate the layout of an XML file to its corresponding view object          LayoutInflater inflater =  Getlayoutinflater ();          //fills a View object by developing an XML file and layout ID           view layout = inflater.inflate (R.layout.custom2 , (ViewGroup) Findviewbyid (r.id.lltoast));                   ImageView image =  (ImageView)   Layout.findviewbyid (r.id.tvimagetoast);          //set picture in Picture view in layout          image.setimageresource (R.drawable.ic_launcher);                   textview  title =  (TextView)  layout.findviewbyiD (r.id.tvtitletoast);          //set title           title.settext ("title bar");                   TextView text =  (TextView)   Layout.findviewbyid (r.id.tvtexttoast);          //Set Content           text.settext ("Fully customizable toast");                   toast toast= new toast ( Getapplicationcontext ());          toast.setgravity (Gravity.CENTER  , 0, 0);          toast.setduration (Toast.LENGTH_ LONG);          toast.setview (layout);          toast.shoW (); 

5. Calls from other threads through Handler

Java code

//Call Method 1      //thread  th=new thread (this);       //th.start ();       //Call Method 2      handler.post (new runnable ()  {            @Override            public void run ()  {               showtoast ();          }       }); 

Handler handler=new handler () {           @Override           public void handlemessage (Message  msg)  {              int what= msg.what;              switch  (What )  {              case 1:                    Showtoast ();                   break;              default:                    break;              }                              super.handlemessage (msg);          }       };

@Override public void Run () {handler.sendemptymessage (1); }

Android Application Development Learning-toast use method Daquan