android SearchView + ListView过滤

布局

        android:id="@+id/searchView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:iconifiedByDefault="false"
        android:inputType="textFilter" />

    ```
initData();

public void onSuccess(int statusCode, String content) {
// TODO Auto-generated method stub
super.onSuccess(statusCode, content);
if (content != null) {
PoliceListBean parseObject = JSON.parseObject(
content, PoliceListBean.class);
if (parseObject.getList() != null) {
mData = parseObject.getList();
mBackData = mData;
}
}

initView

    mSearchView = (SearchView) findViewById(R.id.searchView);
    lv = (ListView) findViewById(R.id.lv_police);
    findViewById(R.id.ib_police_back).setOnClickListener(
            new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    finish();
                }
            });

    mSearchView.setIconifiedByDefault(false);
    mSearchView.setOnQueryTextListener(this);
    mSearchView.setSubmitButtonEnabled(true);
    mSearchView.setQueryHint("查找");
    //mSearchView.setFocusable(false);

    lv.setTextFilterEnabled(true);
    mAdapter = new MyAdapter();
    lv.setAdapter(mAdapter);

自定义Adapter 并添加过滤
``` private class MyAdapter extends BaseAdapter implements Filterable {
        private MyFilter mFilter;

        @Override
        public int getCount() {
            return mData.size();
        }

        @Override
        public Object getItem(int position) {
            return mData.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (null == convertView) {
                convertView = View.inflate(PoliceActivity.this,
                        R.layout.police_item, null);
            }

            TextView name = (TextView) convertView
                    .findViewById(R.id.tv_police_name);
            TextView duiName = (TextView) convertView
                    .findViewById(R.id.tv_police_duizhang);
            TextView number = (TextView) convertView
                    .findViewById(R.id.tv_police_number);

            name.setText(mData.get(position).getJwsmc());
            duiName.setText(mData.get(position).getDzxm());
            number.setText(mData.get(position).getPddys() + "");
            return convertView;
        }

        @Override
        public Filter getFilter() {
            if (null == mFilter) {
                mFilter = new MyFilter();
            }
            return mFilter;
        }

        // 自定义Filter类
        class MyFilter extends Filter {
            @Override
            // 该方法在子线程中执行
            // 自定义过滤规则
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults results = new FilterResults();

                List newValues = new ArrayList();
                String filterString = constraint.toString().trim()
                        .toLowerCase();

                // 如果搜索框内容为空，就恢复原始数据
                if (TextUtils.isEmpty(filterString)) {
                    newValues = mBackData;
                } else {
                    // 过滤出新数据
                    for (ListBean str : mBackData) {
                        if (-1 != str.getJwsmc().toLowerCase()
                                .indexOf(filterString)) {
                            newValues.add(str);
                        }
                    }
                }

                results.values = newValues;
                results.count = newValues.size();

                return results;
            }

            @Override
            protected void publishResults(CharSequence constraint,
                    FilterResults results) {
                mData = (List) results.values;

                if (results.count > 0) {
                    mAdapter.notifyDataSetChanged(); // 通知数据发生了改变
                } else {
                    mAdapter.notifyDataSetInvalidated(); // 通知数据失效
                }
            }
        }

    }```
需要重写的两个方法，onQueryTextSubmit 是你点击键盘的搜索二字 会触发的方法 直接return false也行。
onQueryTextChange 你每输入一个字符就会触发一次，也会刷新一次适配器：
``` @Override
    public boolean onQueryTextSubmit(String query) {
        if (mSearchView != null) {
            // 得到输入管理对象
            InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
            if (imm != null) {
                // 这将让键盘在所有的情况下都被隐藏
                imm.hideSoftInputFromWindow(mSearchView.getWindowToken(), 0); // 输入法如果是显示状态，那么就隐藏输入法
            }
            mSearchView.clearFocus(); // 不获取焦点
        }
        return true;

    }

    @Override
    public boolean onQueryTextChange(String newText) {
        // TODO Auto-generated method stub
        if (TextUtils.isEmpty(newText)) {
            // 清楚ListView的过滤
            mAdapter.getFilter().filter("");
            // lv.clearTextFilter();
        } else {
            // 使用用户输入的内容对ListView的列表项进行过滤
            // 主要是这句写上就没黑框了
            mAdapter.getFilter().filter(newText);
            // lv.setFilterText(newText);

        }
        return true;
    }```


![QQ截图20170626163610.png](http://upload-images.jianshu.io/upload_images/5960267-460f7c89f77476f4.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

去除黑色背景
不获取焦点无效
实时查询动态刷新