Android手机开发：Dialog的使用

1. 只含有OK和Cancel按钮的Dialog

private Dialog buildDialog1(Context context) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setIcon(R.drawable.alert_dialog_icon);
builder.setTitle(R.string.alert_dialog_two_buttons_title);
builder.setPositiveButton(R.string.alert_dialog_ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

setTitle("点击了对话框上的确定按钮");
}
});
builder.setNegativeButton(R.string.alert_dialog_cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

setTitle("点击了对话框上的取消按钮");
}
});
return builder.create();
}

2. 含有3个按钮的Dialog

private Dialog buildDialog2(Context context) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setIcon(R.drawable.alert_dialog_icon);
builder.setTitle(R.string.alert_dialog_two_buttons_msg);
builder.setMessage(R.string.alert_dialog_two_buttons2_msg);
builder.setPositiveButton(R.string.alert_dialog_ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

setTitle("点击了对话框上的确定按钮");
}
});
builder.setNeutralButton(R.string.alert_dialog_something,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

setTitle("点击了对话框上的进入详细按钮");
}
});
builder.setNegativeButton(R.string.alert_dialog_cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

setTitle("点击了对话框上的取消按钮");
}
});
return builder.create();
}

3. 包含OK和Cancel按钮，以及一个View的Dialog

private Dialog buildDialog3(Context context) {
LayoutInflater inflater = LayoutInflater.from(this);
final View textEntryView = inflater.inflate(
R.layout.alert_dialog_text_entry, null);
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setIcon(R.drawable.alert_dialog_icon);
builder.setTitle(R.string.alert_dialog_text_entry);
builder.setView(textEntryView);
builder.setPositiveButton(R.string.alert_dialog_ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
setTitle("点击了对话框上的确定按钮");
}
});
builder.setNegativeButton(R.string.alert_dialog_cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
setTitle("点击了对话框上的取消按钮");
}
});
return builder.create();
}

R.layout.alert_dialog_text_entry定义如下：

<?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:id="@+id/username_view"
android:layout_height="wrap_content"
android:layout_width="wrap_content" android:layout_marginLeft="20dip"
android:layout_marginRight="20dip" android:text="用户名"
android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText android:id="@+id/username_edit"
android:layout_height="wrap_content"
android:layout_width="fill_parent" android:layout_marginLeft="20dip"
android:layout_marginRight="20dip" android:capitalize="none"
android:textAppearance="?android:attr/textAppearanceMedium" />

<TextView android:id="@+id/password_view"
android:layout_height="wrap_content"
android:layout_width="wrap_content" android:layout_marginLeft="20dip"
android:layout_marginRight="20dip" android:text="密码"
android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText android:id="@+id/password_edit"
android:layout_height="wrap_content"
android:layout_width="fill_parent" android:layout_marginLeft="20dip"
android:layout_marginRight="20dip" android:capitalize="none"
android:password="true"
android:textAppearance="?android:attr/textAppearanceMedium" />

</LinearLayout>

4. 直接使用ProgressDialog

private Dialog buildDialog4(Context context) {
ProgressDialog dialog = new ProgressDialog(context);
dialog.setTitle("正在下载歌曲");
dialog.setMessage("请稍候……");
return  dialog;
}