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Android 如何在listview上实现过滤器_Android_Filter_Android Listview - Fatal编程技术网

Android 如何在listview上实现过滤器

Android 如何在listview上实现过滤器,android,filter,android-listview,Android,Filter,Android Listview,在这里提问之前,我看了一下。但该线程包含简单字符串数组的示例,而在我的例子中,我使用的是ArrayList,所以我现在有点困惑 在我的android活动中,我有一个多选项listview。我正在使用列表视图显示联系人列表,以便用户一次可以选择多个电话号码。但现在我想添加搜索功能,以达到同样的目的。我想做的是在顶部放置一个EditText,无论用户在该EditText中键入什么字符,我都希望ListView中根据用户输入填充过滤数据。我有一个CustomAdapter,它扩展了BaseAdapte

在这里提问之前,我看了一下。但该线程包含简单字符串数组的示例,而在我的例子中,我使用的是
ArrayList
,所以我现在有点困惑

在我的android活动中,我有一个多选项
listview
。我正在使用
列表视图
显示联系人列表,以便用户一次可以选择多个电话号码。但现在我想添加搜索功能,以达到同样的目的。我想做的是在顶部放置一个
EditText
,无论用户在该
EditText
中键入什么字符,我都希望
ListView
中根据用户输入填充过滤数据。我有一个
CustomAdapter
,它扩展了
BaseAdapter
,还有一个名为
Contact
的POJO类,我正在使用它来
获取
设置
联系人详细信息

MYCUSTOMADAPTER.JAVA

public class MyCustomAdapter extends BaseAdapter {

Context mContext;
private LayoutInflater mInflater;
SparseBooleanArray mSparseBooleanArray;
private ArrayList<Map<String,String>> mAdapData = new ArrayList<Map<String, String>>();

public MyCustomAdapter(Context mContext) {
    mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    mSparseBooleanArray = new SparseBooleanArray();
}

public ArrayList<String> getCheckedItems() {
    ArrayList<String> mTempArry = new ArrayList<String>();
    for (int i = 0; i < mAdapData.size(); i++) {
        if (mSparseBooleanArray.get(i)) {
            Map<String, String> map = (Map<String, String>) mAdapData.get(i);
            final String numbr = map.get("Phone").toString();
            mTempArry.add(numbr);
        }
    }
    return mTempArry;
}

public int getCount() {
    return this.mAdapData.size();
}

public void addItem(String paramString1, String paramString2) {
    Map<String, String> NameNumber = new HashMap<String, String>();
    NameNumber.put("Name", paramString1);
    NameNumber.put("Phone", paramString2);
    this.mAdapData.add(NameNumber);
    notifyDataSetChanged();
}

@SuppressWarnings("unchecked")
public Object getItem(int paramInt) {
    return (ArrayList<Map<String, String>>) this.mAdapData.get(paramInt);
}

public long getItemId(int paramInt) {
    return paramInt;
}

public View getView(final int paramInt, View paramView, ViewGroup paramViewGroup) {

    if (paramView == null) {
        paramView = mInflater.inflate(R.layout.multiplecontactview, null);
    }

    TextView txtName = (TextView) paramView.findViewById(R.id.txtContactName);
    TextView txtNumber = (TextView) paramView.findViewById(R.id.txtContactNumber);
    CheckBox mCheckBox = (CheckBox) paramView.findViewById(R.id.checkBox1);
    mCheckBox.setTag(paramInt);
    mCheckBox.setChecked(mSparseBooleanArray.get(paramInt));
    mCheckBox.setOnCheckedChangeListener(mCheckedChangeListener);
    txtName.setTextColor(Color.BLACK);
    txtNumber.setTextColor(Color.BLACK);
    for (int i = 0; i < mAdapData.size(); i++) {
        Map<String, String> map = (Map<String, String>) mAdapData.get(paramInt);
        final String name = map.get("Name").toString();
        final String numbr = map.get("Phone").toString();
        txtName.setText(name);
        txtNumber.setText(numbr);
    }
    return paramView;
}

OnCheckedChangeListener mCheckedChangeListener = new OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
    }
};
}

要做到这一点,您需要实现

然后将filterTextWatcher设置为您的编辑文本:

searchEditText.addTextChangedListener(filterTextWatcher);
希望有帮助!:)

private TextWatcher filterTextWatcher = new TextWatcher() {

    public void beforeTextChanged(CharSequence s, int start, int count,
            int after) {
    }

    public void onTextChanged(CharSequence s, int start, int before,
            int count) {

    }

    @Override
    public void afterTextChanged(Editable arg0) {
        /*clear previous contents of list*/
                     adapter.clear();
                    /*add new contents according to the filter*/
                   String filter=arg0.getText().toString();
                   if (filter == null
                            || Pattern
                                    .compile(Pattern.quote(filter),
                                            Pattern.CASE_INSENSITIVE)
                                    .matcher(adapter.getItem(...)).find()
                            || filter.equals("")) {
                        adapter.addItem(...);
                    }
    }

};
searchEditText.addTextChangedListener(filterTextWatcher);