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AlertDialog一个可以展示 标题，三个按钮，可选择项的列表或自定义布局 的对话框。DatePickerDialog or TimePickerDialog一个使用预先定义好的UI，允许用户选择一个日期或时间 的对话框android.app.DialogFragment.。DialogFragment:管理的：public class FireMissilesDialogFragment extends DialogFragment { @Override public Dialog onCreateDialog(Bundle savedInstanceState) { // Use the Builder class for convenient dialog construction AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setMessage(R.string.dialog_fire_missiles) .setPositiveButton(R.string.fire, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // FIRE ZE MISSILES! } }) .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // User cancelled the dialog } }); // Create the AlertDialog object and return it return builder.create(); }}
AlertDialog:：// 1. 通过它的构造器实例化一个 AlertDialog.BuilderAlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); // 2.将设置方法都集合在一起来设置对话框的属性builder.setMessage(R.string.dialog_message) .setTitle(R.string.dialog_title); // 3. 从create()中获得AlertDialogAlertDialog dialog = builder.create();setPositiveButton() 和setNegativeButton()方法AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());// Add the buttonsbuilder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // User clicked OK button } });builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // User cancelled the dialog } });// Set other dialog properties... // Create the AlertDialogAlertDialog dialog = builder.create();DialogInterface.OnClickListener ，该监听器定义了当用户点击该按钮时的操作。AlertDialog.中。也就是说，不能有多个“positive”按钮。
@Overridepublic Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setTitle(R.string.pick_color) .setItems(R.array.colors_array, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { // which 变量包含了被选中项的索引值 } }); return builder.create();}ListAdapter,返回你的列表，经常使用一个Loader来异步加载内容。这些在Building Layouts with an Adapter 和 Loaders开发向导中详细的讲解了。
setMultiChoiceItems() 或setSingleChoiceItems() 方法。ArrayList:中：@Overridepublic Dialog onCreateDialog(Bundle savedInstanceState) { mSelectedItems = new ArrayList(); //跟踪被选项的地方 AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); // 设置对话框标题 builder.setTitle(R.string.pick_toppings) // 指定列表数组, 默认被选中项t (null for none),和选择项目时的监听器 .setMultiChoiceItems(R.array.toppings, null, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { if (isChecked) { // 如果用户选中了项目，将它加入被选择项 mSelectedItems.add(which); } else if (mSelectedItems.contains(which)) { // 否则，如果项目已经在数组中，移除它 mSelectedItems.remove(Integer.valueOf(which)); } } }) // Set the action buttons .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { // 用户点击OK，因此建议mSelectedItems 结果存储在某处，或者从打开的对话框中返回它们。 // or return them to the component that opened the dialog ... } }) .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { ... } }); return builder.create();}
setView() 来添加进去。<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageView android:src="@drawable/header_logo" android:layout_width="match_parent" android:layout_height="64dp" android:scaleType="center" android:background="#FFFFBB33" android:contentDescription="@string/app_name" /> <EditText android:id="@+id/username" android:inputType="textEmailAddress" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="16dp" android:layout_marginLeft="4dp" android:layout_marginRight="4dp" android:layout_marginBottom="4dp" android:hint="@string/username" /> <EditText android:id="@+id/password" android:inputType="textPassword" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="4dp" android:layout_marginLeft="4dp" android:layout_marginRight="4dp" android:layout_marginBottom="16dp" android:fontFamily="sans-serif" android:hint="@string/password"/></LinearLayout>LayoutInflater 并且调用inflate()，它的第一个参数是布局资源ID，第二个参数是布局的父view。之后你可以调用setView()来在该对话框中放置该布局。@Overridepublic Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); // Get the layout inflater LayoutInflater inflater = getActivity().getLayoutInflater(); // Inflate and set the layout for the dialog // Pass null as the parent view because its going in the dialog layout builder.setView(inflater.inflate(R.layout.dialog_signin, null)) // Add action buttons .setPositiveButton(R.string.signin, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { // sign in the user ... } }) .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { LoginDialogFragment.this.getDialog().cancel(); } }); return builder.create();}<activity> 配置元素中设置它的主题为Theme.Holo.Dialog ：<activity android:theme="@android:style/Theme.Holo.Dialog" >DialogFragment ，定义了一个接口，通过它传递事件给持有者的activity：public class NoticeDialogFragmentextends DialogFragment { /* 创建该对话框碎片引用的activity必须实现该接口 ，为了收到事件回调 public interface NoticeDialogListener { public void onDialogPositiveClick(DialogFragment dialog); public void onDialogNegativeClick(DialogFragment dialog); } // 使用该接口的实例来传递操作事件 NoticeDialogListener mListener; // 重写Fragment.onAttach()方法来实例化 NoticeDialogListener @Override public void onAttach(Activity activity) { super.onAttach(activity); // 验证持有者的activity 实现了回调接口 try { // Instantiate the NoticeDialogListener so we can send events to the host mListener = (NoticeDialogListener) activity; } catch (ClassCastException e) { // The activity doesn‘t implement the interface, throw exception throw new ClassCastException(activity.toString() + " must implement NoticeDialogListener"); } } ...}public class MainActivity extends FragmentActivity implements NoticeDialogFragment.NoticeDialogListener{ ... public void showNoticeDialog() { // 创建一个 dialog fragment 引用并且展示它 DialogFragment dialog = new NoticeDialogFragment(); dialog.show(getSupportFragmentManager(), "NoticeDialogFragment"); } // dialog fragment 通过Fragment.onAttach()回调返回一个参数给改activity ，它被用来调用如下方法，这些方法定义在 NoticeDialogFragment.NoticeDialogListener接口 @Override public void onDialogPositiveClick(DialogFragment dialog) { // User touched the dialog‘s positive button ... } @Override public void onDialogNegativeClick(DialogFragment dialog) { // User touched the dialog‘s negative button ... }}public class NoticeDialogFragment extends DialogFragment { ... @Override public Dialog onCreateDialog(Bundle savedInstanceState) { // Build the dialog and set up the button click handlers AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setMessage(R.string.dialog_fire_missiles) .setPositiveButton(R.string.fire, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // Send the positive button event back to the host activity mListener.onDialogPositiveClick(NoticeDialogFragment.this); } }) .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // Send the negative button event back to the host activity mListener.onDialogNegativeClick(NoticeDialogFragment.this); } }); return builder.create(); }}getFragmentManager() 从Fragment 中获得FragmentManager。例如：public void confirmFireMissiles() { DialogFragment newFragment = new FireMissilesDialogFragment(); newFragment.show(getSupportFragmentManager(), "missiles");}findFragmentByTag().来获得。DialogFragment 类提供你这些易用性，因为它仍可以像一个可嵌入的片段一样。onCreateView() 中加载该布局。public class CustomDialogFragment extends DialogFragment { /** 系统调用该方法来获得 DialogFragment‘s 布局, 不关心是否是作为一个对话框显示还是可嵌入的碎片 */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout to use as dialog or embedded fragment return inflater.inflate(R.layout.purchase_items, container, false); } /** 系统调用该方法，仅当创建对话框布局时 */ @Override public Dialog onCreateDialog(Bundle savedInstanceState) { // 你必须覆盖该方法的唯一原因就是当使用 onCreateView() 来更改任何对话框属性时。例如，对话框默认包含一个标题，但是你的自定义布局或许不需要它。因此你可以移除对话框标题，但是你必须调用父类来获得该对话框。 Dialog dialog = super.onCreateDialog(savedInstanceState); dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); return dialog; }}public void showDialog() { FragmentManager fragmentManager = getSupportFragmentManager(); CustomDialogFragment newFragment = new CustomDialogFragment(); if (mIsLargeLayout) { // The device is using a large layout, so show the fragment as a dialog newFragment.show(fragmentManager, "dialog"); } else { // The device is smaller, so show the fragment fullscreen FragmentTransaction transaction = fragmentManager.beginTransaction(); // For a little polish, specify a transition animation transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); // To make it fullscreen, use the ‘content‘ root view as the container // for the fragment, which is always the root view for the activity transaction.add(android.R.id.content, newFragment) .addToBackStack(null).commit(); }}<!-- Default boolean values --><resources> <bool name="large_layout">false</bool></resources><!-- Large screen boolean values --><resources> <bool name="large_layout">true</bool></resources>boolean mIsLargeLayout; @Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mIsLargeLayout = getResources().getBoolean(R.bool.large_layout);}<activity>配置元素中应用Theme.Holo.DialogWhenLarge主题：<activity android:theme="@android:style/Theme.Holo.DialogWhenLarge" >DialogFragment.中调用dismiss() 来手工的消散你的对话框。DialogFragment.中实现onDismiss()方法。onDismiss() 。然而，如果你调用Dialog.dismiss() 或DialogFragment.dismiss()，system 系统调用onDismiss()但不会调用onCancel()。因此当用户点击了你对话框上的posivity按钮来从view上移除该对话框时，通常调用dismiss() 。标签：
原文地址：http://www.cnblogs.com/android-blogs/p/5703292.html
