我修改的工作样本基本上在下面我有2个编辑框我希望两者的值都显示在一个警告框中,其余的代码工作正常,警报框确实显示但没有输入值。
public class Main extends Activity {
EditText username = null;
EditText password = null;
Button login;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
EditText usern = (EditText) findViewById(R.id.username);
EditText pass = (EditText) findViewById(R.id.password);
Button login = (Button) findViewById(R.id.login);
String usernm = usern.getText().toString();
String passnm = pass.getText().toString();
final Builder alert = new AlertDialog.Builder(this)
.setTitle("SHOW FIELDS")
.setMessage("USERNAME:" + usernm + " PASSWORD:" + passnm)
.setNegativeButton("CLOSE", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
closeContextMenu();
}
});
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
alert.show();
}
});
答案 0 :(得分:1)
您需要在按钮上获取EditText的值,因此在AlertDialog中显示为:
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
usernm = usern.getText().toString();
passnm = pass.getText().toString();
alert.show();
}
并在班级
声明usernm
和passnm
编辑: 或者最好的方法是创建一个显示警报的方法,并在按钮点击时调用它:
public void showalert(){
usernm = usern.getText().toString();
passnm = pass.getText().toString();
alert = new AlertDialog.Builder(Main.this)
.setTitle("SHOW FIELDS")
.setMessage("USERNAME:" + usernm + " PASSWORD:" + passnm)
.setNegativeButton("CLOSE", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
closeContextMenu();
}
});
alert.show();
}
并按下按钮调用此方法:
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showalert();
}:
});
并在类级别声明所有变量,您可以通过它们在整个类中访问它:
public class Main extends Activity {
EditText usern ;
EditText pass ;
Button login;
String usernm ,passnm; //<<< Declare here
Builder alert;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
usern = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
login = (Button) findViewById(R.id.login);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showalert();
}
});
}