Android实现登录邮箱的自动补全功能

概述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 @H_419_0@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

@H_419_0@效果：

@H_419_0@实现原理：

@H_419_0@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。

@H_419_0@1、通过继承自简单控件autoCompleteTextVIEw实现帐号自动补全

@H_419_0@关键代码：

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......  }

@H_419_0@activity_autocomplete_item 下拉列表布局文件

<?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>

@H_419_0@上面自动补全的效果图：

@H_419_0@2、通过组合方式实现帐号自动补全复杂控件

@H_419_0@关键代码：

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(0,40,0);    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d窗，而崩溃    mautoComplete.init(mImageVIEw);   }}

@H_419_0@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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