<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="left" android:text="账号" android:layout_marginLeft="20dip" android:layout_marginRight="20dip" android:textAppearance="?android:attr/textAppearanceMedium" /> <EditText android:id="@+id/username" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="20dip" android:layout_marginRight="20dip" android:textAppearance="?android:attr/textAppearanceMedium" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="left" android:layout_marginLeft="20dip" android:layout_marginRight="20dip" android:text="密码" android:textAppearance="?android:attr/textAppearanceMedium" /> <EditText android:id="@+id/password" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="20dip" android:layout_marginRight="20dip" android:password="true" android:textAppearance="?android:attr/textAppearanceMedium" /></LinearLayout>
第2步：创建对话框
public class MainActivity extends Activity {@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);alertDialog.setTitle("登录提示").setMessage("这里需要登录").setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) { //点击确定进入登录对话框//Inflator在android中建立了资源文件到对象的桥梁LayoutInflater layoutInflater=LayoutInflater.from(MainActivity.this);//得到自定义的对话框View dialogView=layoutInflater.inflate(R.layout.dialog, null);//创建对话框AlertDialog.Builder loginDialog=new AlertDialog.Builder(MainActivity.this);loginDialog.setTitle("登录框").setView(dialogView).setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//输入完成后，点击确定开始登录//创建进度对话框final ProgressDialog progressDialog=ProgressDialog.show(MainActivity.this, "请等待", "正在为你登录",true);new Thread(){@Overridepublic void run() {try {Thread.sleep(3000);} catch (InterruptedException e) {e.printStackTrace();}finally{progressDialog.dismiss();}}}.start();}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {finish();//如果点击了取消按钮则退出应用程序}}).create().show();}}).setNeutralButton("退出",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {finish();}}).create().show();}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.activity_main, menu);return true;}}
