Android --- 05 --- simple logon demo

Package com. example. test_login; import android. app. activity; import android. OS. bundle; import android. view. view; import android. widget. editText; import android. widget. toast; public class MainActivity extends Activity {private EditText name; private EditText password; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); name = (EditText) findViewById (R. id. name); password = (EditText) findViewById (R. id. password);} public void click (View view) {if (name. getText (). toString (). equals ("abc") & password. getText (). toString (). equals ("abc") {// 1. context // MainActivity. this is the current Activity object // set because Toast is displayed in the current Activity. this // 2.res // text displayed by Toast // 3. duration Toast. makeText (MainActivity. this, "jump", Toast. LENGTH_SHORT ). show (); // show () display Toast} else {name. setError ("incorrect user name or password"); password. setError ("incorrect user name or password ");}}}

Result:

Click to bring up Toast.