Android Case one Phone Dialer

: The core principle of telephone dialer:   Intent mainactivity Code:    Private Edittest et_number;//loading a layout setcontentview (R.layout.main);  //gets the desired control editTest1 Button1 et_number = (edittest) Findviewbyid (r.id.edittest1);  button Btn_call = ( button) Findviewbyid (r.id.button1)  //for button Btn_call set Click events   Implement an inner class Btn_call.setonclicklistener (new Myclicklistener ());  //Inner class implement Click event Private class Myclicklistener (View v) {        String number = et _number.gettext (). toString (). Trim ();        if ("". Equals (number)) {            Toast.maketest (Mainactivity.this, "mobile phone number cannot be empty! ", Length_long);}        //Create an intent         Intent Intent = new Intent ();       / /Set Intent action         intent.setaction (intent.action_call);         //Set Intent data         Intent.setdata (Uri.parse ("Tel:" +number);         //Open Intent         startactivity (intent);} Summary: 1. Intent: First step: Create intent intent Intent = new Intent ();  second step: Set action Intent.setaction (string);  step three: Set Object Intent.setdata ( Path);  Fourth step: Open Intent startactivity (intent);  2. Four ways to implement the Click event: 

1. Inner class
   Btn_call.setonclicklistener (interface type new Myclicklistener ());
   Private Class Myclicklistener (View v) {
   Callphone ();
   }
   
   
2. Anonymous inner class
   Btn_call.setonclicklistener (New Onclicklistener (View v) {
   Implement the OnClick () method that is not implemented in the Onclicklistener class
   
   
3. Mainactivity implementation of Onclicklistener-------------for multiple buttons
   Btn_call1.setonclicklistener (this);
   Btn_call2.setonclicklistener (this);
   Btn_call3.setonclicklistener (this);
   Switch (V.getid ()) ....
4. Write a class with the same name as the Click Property. Implement click events in this class
   
   

Android Case one Phone Dialer