另外一种继承 Dialog的方法以及发动线程

public class SettingsDialog extends Dialog implements android.view.View.OnClickListener {
        public SettingsDialog(XMPPClient xmppClient) {
        super(xmppClient);
           }    protected void onStart() {
        super.onStart();
        setContentView(R.layout.settings);
        getWindow().setFlags(4, 4);
        setTitle("XMPP Settings");
        Button ok = (Button) findViewById(R.id.ok);
        ok.setOnClickListener(this);
    }    public void onClick(View v) {
        String host = getText(R.id.host);
        String port = getText(R.id.port);
        String service = getText(R.id.service);
        String username = getText(R.id.userid);
        String password = getText(R.id.password);                          dismiss();
    }    private String getText(int id) {
        EditText widget = (EditText) this.findViewById(id);
        return widget.getText().toString();
    }
} 
使用
 setup.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                mHandler.post(new Runnable() {
                    public void run() {
                        mDialog.show();
                    }
                });
            }
        });