【移动应用开发技术】Spinner怎么在Dialog中使用

【移动应用开发技术】Spinner怎么在Dialog中使用

Spinner怎么在Dialog中使用？很多新手对此不是很清楚，为了帮助大家解决这个难题，下面在下将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。Spinner在Dialog中的使用，Dialog中关于view的xml布局。<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:padding="16dp">

<Spinner

android:id="@+id/spinner"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginBottom="2dp"

/>

<EditText

android:id="@+id/edit"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:padding="8dp"

/>

</LinearLayout>dialog初始化，加载，显示出来的完整代码(包含对Spinner进行Adapter设置)。private

void

showAlertDialog()

{

View

view

=

LayoutInflater.from(this).inflate(R.layout.dialog_add_notebook,

null);

Spinner

spinner

=

view.findViewById(R.id.spinner);

ArrayAdapter<String>

arrayAdapter

=

new

ArrayAdapter<>(this,

R.layout.simple_spinner_item,

android.R.id.text1,

categories);

spinner.setAdapter(arrayAdapter);

spinner.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener()

{

@Override

public

void

onItemSelected(AdapterView<?>

parent,

View

view,

int

position,

long

id)

{

Toast.makeText(MainActivity.this,

"选中的分类是:

"

+

categories.get(position),

Toast.LENGTH_LONG).show();

}

@Override

public

void

onNothingSelected(AdapterView<?>

parent)

{

}

});

new

AlertDialog.Builder(this)

.setTitle("提示")

.setView(view)

.setPositiveButton(android.R.string.ok,

new

DialogInterface.OnClickListener()

{

@Override

public

void

onClick(DialogInterface

dialog,

int

which)

{

dialog.dismiss();

}

})

.show();

}只能说spinner在dialog中，显示出来的效果一般般，即使通过自定义item布局，调整padding，感觉效果也不是特别让人满意。截张图:

在Github上找到一个不错的项目，/Lesilva/BetterSpinner。修改代码，替换为BetterSpinner。在app/build.gradle中添加compile‘com.weiwangcn.betterspinner:library:1.1.0'xml布局文件修改为:<?xml

version="1.0"

encoding="utf-8"?>

<LinearLayout

xmlns:android="/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:padding="16dp">

<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner

android:id="@+id/spinner"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginBottom="@dimen/activity_vertical_margin"

android:hint="@string/notebook_choose_notebook_hint"

/>

<EditText

android:id="@+id/edit"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:padding="8dp"

/>

</LinearLayout>显示dialog的方法调整为public

void

onClickedAddNotebook(final

String

parentNotebookId,

List<Notebook>

notebooks)

{

View

view

=

LayoutInflater.from(mActivity).inflate(R.layout.dialog_add_notebook,

null);

final

EditText

mEdit

=

(EditText)

view.findViewById(R.id.edit);

final

MaterialBetterSpinner

spinner

=

(MaterialBetterSpinner)

view.findViewById(R.id.spinner);

final

List<Notebook>

tempNotebooks

=

new

ArrayList<>();

tempNotebooks.clear();

tempNotebooks.addAll(notebooks);

Notebook

rootNoteBook

=

new

Notebook();

rootNoteBook.setTitle(mActivity.getString(R.string.notebook_default_root_notebook_title));

tempNotebooks.add(0,

rootNoteBook);

SpinnerArrayAdapter<Notebook>

adapter

=

new

SpinnerArrayAdapter<Notebook>(view.getContext(),

tempNotebooks)

{

@Override

public

String

itemToString(Notebook

item)

{

return

item.getTitle();

}

};

spinner.setAdapter(adapter);

spinner.setText(rootNoteBook.getTitle());

new

AlertDialog.Builder(mActivity)

.setTitle(R.string.add_notebook)

.setView(view)

.setPositiveButton(R.string.confirm,

new

DialogInterface.OnClickListener()

{

@Override

public

void

onClick(DialogInterface

dialog,

int

which)

{

dialog