Android实现登录邮箱的自动补全功能
来源:互联网 发布:淘宝宝贝降权查询 编辑:程序博客网 时间:2024/04/28 20:39
本文实例为大家分享了Android登录邮箱自动补全功能的实现方法,供大家参考,具体内容如下
效果:
实现原理:
1、继承重写简单控件AutoCompleteTextView
2、编写自定义数据适配器和布局文件,并实现文字变化监听器
3、通过组合方式,实现右侧的删除图标。并根据焦点和文字的变化,动态显示右侧删除图标。
1、通过继承自简单控件AutoCompleteTextView实现帐号自动补全
关键代码:
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public
class
AutoComplete
extends
AutoCompleteTextView {
private
static
final
String[] emailSuffix = {
"@qq.com"
,
"@163.com"
,
"@126.com"
,
"@gmail.com"
,
"@sina.com"
,
"@hotmail.com"
,
"@yahoo.cn"
,
"@sohu.com"
,
"@foxmail.com"
,
"@139.com"
,
"@yeah.net"
,
"@vip.qq.com"
,
"@vip.sina.com"
};
......省略号......
//构造函数原型要正确,留给系统调用
public
AutoComplete(Context context) {
super
(context);
mContext = context;
}
public
AutoComplete(Context context, AttributeSet attrs) {
super
(context, attrs);
mContext = context;
}
public
void
init(ImageView imageView) {
mImageView = imageView;
final
MyAdatper adapter =
new
MyAdatper(mContext);
setAdapter(adapter);
addTextChangedListener(
new
TextWatcher() {
@Override
public
void
afterTextChanged(Editable s) {
if
(isTextWatch) {
String input = s.toString();
......省略号......
adapter.clearList();
//注意要清空数据,根据输入的变化,自动生成数据
if
(input.length() >
0
) {
for
(
int
i =
0
; i < emailSuffix.length; ++i) {
adapter.addListData(input + emailSuffix[i]);
}
}
adapter.notifyDataSetChanged();
showDropDown();
//该行代码会造成崩溃
}
}
});
//当输入一个字符的时候就开始检测
setThreshold(
1
);
}
private
class
ViewHolder {
TextView tv_Text;
}
class
MyAdatper
extends
BaseAdapter
implements
Filterable {
private
List<String> mList;
private
Context mContext;
private
MyFilter mFilter;
......省略号......
public
void
clearList() {
mList.clear();
}
public
void
addListData(String strData) {
mList.add(strData);
}
@Override
public
View getView(
int
position, View convertView, ViewGroup parent) {
View view;
ViewHolder viewHolder;
if
(convertView ==
null
) {
view = LayoutInflater.from(mContext).inflate(R.layout.activity_autocomplete_item,
null
);
viewHolder =
new
ViewHolder();
viewHolder.tv_Text = (TextView) view.findViewById(R.id.tv_autocomplete);
view.setTag(viewHolder);
}
else
{
view = convertView;
viewHolder = (ViewHolder) view.getTag();
}
viewHolder.tv_Text.setText(mList.get(position));
return
view;
}
......省略号......
}
activity_autocomplete_item 下拉列表布局文件
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<?
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
LinearLayout
xmlns:android
=
"http://schemas.android.com/apk/res/android"
android:orientation
=
"vertical"
android:layout_width
=
"match_parent"
android:background
=
"@color/White"
android:layout_height
=
"wrap_content"
>
<
TextView
android:id
=
"@+id/tv_autocomplete"
android:padding
=
"15dp"
android:textSize
=
"20sp"
android:singleLine
=
"true"
android:textColor
=
"@color/Black"
android:layout_width
=
"match_parent"
android:layout_height
=
"wrap_content"
/>
</
LinearLayout
>
上面自动补全的效果图:
2、通过组合方式实现帐号自动补全复杂控件
关键代码:
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public
class
AdvancedAutoCompleteTextView
extends
RelativeLayout {
private
Context mContext;
private
AutoComplete mAutoComplete;
//上面的自定义控件
private
ImageView mImageView;
//右侧的图标控件
......省略号......
@Override
protected
void
onFinishInflate() {
super
.onFinishInflate();
initViews();
}
//代码方式,初始化布局
private
void
initViews() {
RelativeLayout.LayoutParams params =
new
RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
params.addRule(RelativeLayout.CENTER_VERTICAL);
mAutoComplete =
new
AutoComplete(mContext);
mAutoComplete.setLayoutParams(params);
mAutoComplete.setPadding(
0
,
0
,
40
,
0
);
mAutoComplete.setSingleLine(
true
);
mAutoComplete.setInputType(InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS);
mAutoComplete.setFitsSystemWindows(
true
);
mAutoComplete.setEms(
10
);
mAutoComplete.setHint(
"URS账号"
);
mAutoComplete.setImeOptions(EditorInfo.IME_ACTION_NEXT
| EditorInfo.IME_FLAG_NO_EXTRACT_UI | EditorInfo.IME_FLAG_NO_FULLSCREEN);
mAutoComplete.setDropDownHorizontalOffset(
0
);
mAutoComplete.setDropDownVerticalOffset(
2
);
mAutoComplete.setBackgroundResource(R.drawable.edit_text_background);
RelativeLayout.LayoutParams p =
new
RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);
p.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
p.addRule(RelativeLayout.CENTER_VERTICAL);
p.rightMargin =
10
;
mImageView =
new
ImageView(mContext);
mImageView.setLayoutParams(p);
mImageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
mImageView.setImageResource(R.drawable.unselect);
mImageView.setClickable(
true
);
mImageView.setOnClickListener(
new
View.OnClickListener() {
@Override
public
void
onClick(View v) {
setText(
""
);
}
});
this
.addView(mAutoComplete);
this
.addView(mImageView);
//监听获取焦点事件,目的:输入帐号时,右侧图标的显示
mAutoComplete.setOnFocusChangeListener(
new
OnFocusChangeListener() {
@Override
public
void
onFocusChange(View v,
boolean
hasFocus) {
if
(hasFocus && !mAutoComplete.getText().toString().isEmpty()) {
mAutoComplete.setShow(
false
);
//如果获取首次获取焦点,此时文本不为空,则显示,并禁止文本改变监听里的设置
mImageView.setImageResource(R.drawable.item_delete);
}
else
if
(hasFocus) {
mAutoComplete.setShow(
true
);
//如果获取首次获取焦点,此时文本为空,则不改变,并开启文本改变监听里的设置
}
else
{
mAutoComplete.setShow(
false
);
mImageView.setImageResource(R.drawable.unselect);
}
}
});
//对AutoComplete自定义控件初始化,一定要放到最后.否则,会由于AutoComplete初始化未完成,就弹窗,而崩溃
mAutoComplete.init(mImageView);
}
}
以上就是本文的全部内容,希望对大家的学习有所帮助。
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