Android用戶界面——對話框（Dialog)

Android有四種默認的Dialog實現:AlertDialog、ProgressDialog、DatePickerDialog、TimePickerDialog。另外你還可以繼承android.app.Dialog實現自已的dialog。

1.AlertDialog是一種能構造默認的零、一、二、三個按鈕的對話框和單選或多選的的選擇對話框。

2.ProgressDialog是繼函大自AlertDialog，除了AlertDialog功能外，它還能顯視進度圈或條的對話框。

3.DatePickerDialog/TimePickerDialog是分別能讓用戶選擇日期和時間的對話框。

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AlertDialog部分：

1.不同個數按鈕選擇的Dialog:

new AlertDialog.Builder(Context) .setIcon(R.drawable.alert_dialog_icon) //圖片 .setTitle(R.string.alert_dialog_two_buttons_msg) //title .setMessage(R.string.alert_dialog_two_buttons2_msg) //message .setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() //確定按鈕 { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked OK so do some stuff */ } }) .setNeutralButton(R.string.alert_dialog_something, new DialogInterface.OnClickListener() //中間 { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked Something so do some stuff */ } }) .setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() //否定按鈕 { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked Cancel so do some stuff */ } }) .show();

注意：每個setXX都是可選可不選的。例如:可以都不選只選setMessage("--")得到和toast一樣效果的dialog。

2.單選Dialog:

 

加入：

.setItems(R.array.select_dialog_items, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { String[] items = getResources().getStringArray(R.array.select_dialog_items); new AlertDialog.Builder(AlertDialogSamples.this) .setMessage("You selected: " + which + " , " + items[which]) .show(); } }

3.多選Dialog:

加入：

.setMultiChoiceItems(R.array.select_dialog_items3, new boolean[]{false, true, false, true, false, false, false}, new DialogInterface.OnMultiChoiceClickListener() { public void onClick(DialogInterface dialog, int whichButton, boolean isChecked) { /* User clicked on a check box do some stuff */ } })

4.可輸入Dialog:

LayoutInflater factory = LayoutInflater.from(this); final View textEntryView = factory.inflate(R.layout.alert_dialog_text_entry, null);//是一個View類  

在加入：

  .setView(textEntryView)

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ProgressDialog部分：

 

ProgressDialog mProgressDialog ; mProgressDialog = new ProgressDialog(AlertDialogSamples.this); mProgressDialog.setIcon(R.drawable.alert_dialog_icon); mProgressDialog.setTitle(R.string.select_dialog); mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); mProgressDialog.setMax(MAX_PROGRESS); mProgressDialog.setButton(getText(R.string.alert_dialog_hide), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked No so do some stuff */ } }); mProgressDialog.setButton2(getText(R.string.alert_dialog_cancel), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked No so do some stuff */ } });  

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DatePickerDialog或DatePickerDialog部分：

注意：所有例子都在Android自帶的ApiDemos例子中！