Google 在官方文档中已经默认DialogFragment作为对话框的容器, 在其中填入AlertDialog或DatePickerDialog/ TimePickerDialog
- 优点: DialogFragment 能依靠 activity 的 onSaveInstance 和 FragmentManager 在横竖屏切换等 Activity 被杀死重建时重建对话框
- 缺点: TargetVersion 需定到 APILevel 11
用法
自定义布局
-
创建布局文件
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/id_label_your_name" android:layout_width="wrap_content" android:layout_height="32dp" android:gravity="center_vertical" android:text="Your name:" /> <EditText android:id="@+id/id_txt_your_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_toRightOf="@id/id_label_your_name" android:imeOptions="actionDone" android:inputType="text" /> <Button android:id="@+id/id_sure_edit_name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@id/id_txt_your_name" android:text="ok" /> </RelativeLayout> -
继承DialogFragment,重写onCreagteView
@Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) { View inflate = inflater.inflate(R.layout.fragment_dialog, container); getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉默认标题 return inflate; } -
在 activity中调用
EditDialogFragment editDialogFragment = new EditDialogFragment(); editDialogFragment.show(getFragmentManager(), "EditNameDialog");
默认的dialog格式, 按钮具体的样式跟着系统版本变化
- 布局不需要添加按钮
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/id_label_your_name" android:layout_width="wrap_content" android:layout_height="32dp" android:gravity="center_vertical" android:text="Your name:" /> <EditText android:id="@+id/id_txt_your_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_toRightOf="@id/id_label_your_name" android:imeOptions="actionDone" android:inputType="text" /> <Button android:id="@+id/id_sure_edit_name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_below="@id/id_txt_your_name" android:text="ok" /> </RelativeLayout> - 重写onCreateDialog
onAttach 拿到上下文, 判断后强转成 Listenerpublic class NoticeDialogFragment extends DialogFragment { /* The activity that creates an instance of this dialog fragment must * implement this interface in order to receive event callbacks. * Each method passes the DialogFragment in case the host needs to query it. */ public interface NoticeDialogListener { public void onDialogPositiveClick(DialogFragment dialog); public void onDialogNegativeClick(DialogFragment dialog); } // Use this instance of the interface to deliver action events NoticeDialogListener mListener; // Override the Fragment.onAttach() method to instantiate the NoticeDialogListener @Override public void onAttach(Context context) { super.onAttach(context); // Verify that the host activity implements the callback interface try { // Instantiate the NoticeDialogListener so we can send events to the host mListener = (NoticeDialogListener) context; } catch (ClassCastException e) { // The activity doesn't implement the interface, throw exception throw new ClassCastException(context.toString() + " must implement NoticeDialogListener"); } } ... @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(); } } } - 调用
DialogFragment newFragment = new FireMissilesDialogFragment(); newFragment.show(getSupportFragmentManager(), "missiles"); - 数据传递, 在 Activity 继承接口, 实现方法
public class MainActivity extends FragmentActivity implements NoticeDialogFragment.NoticeDialogListener{ ... public void showNoticeDialog() { // Create an instance of the dialog fragment and show it DialogFragment dialog = new NoticeDialogFragment(); dialog.show(getSupportFragmentManager(), "NoticeDialogFragment"); } // The dialog fragment receives a reference to this Activity through the // Fragment.onAttach() callback, which it uses to call the following methods // defined by the NoticeDialogFragment.NoticeDialogListener interface @Override public void onDialogPositiveClick(DialogFragment dialog) { // User touched the dialog's positive button dialog.getdialog.findViewById... ... } @Override public void onDialogNegativeClick(DialogFragment dialog) { // User touched the dialog's negative button ... } }
清除对话框
手动调dismiss();
默认AlertDialog, 改button颜色
先show(), 之后再getButton
AlertDialog alertdialog = new AlertDialog.Builder(getActivity()).create();
LayoutInflater layoutInflater = getActivity().getLayoutInflater();
View view = layoutInflater.inflate(R.layout.fragment_dialog, null);
alertdialog.setView(view);
alertdialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
alertdialog.setButton(DialogInterface.BUTTON_POSITIVE, "ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
alertdialog.show();
Button button = alertdialog.getButton(alertdialog.BUTTON_POSITIVE);
button.setTextColor(Color.parseColor("#00ffff"));
return alertdialog;
不可点击
- 通用
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // this.setCancelable(false); } - dialog的另一种方式
public Dialog onCreateDialog(Bundle savedInstanceState) { dialog.setCanceledOnTouchOutside(false);// 设置点击屏幕Dialog不消失 }
参考
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