SearchView的用法

来源：互联网发布：支付宝解除淘宝绑定编辑：程序博客网时间：2024/05/24 01:21
SearchView即时搜索提示功能，主要实现如下：layout布局：<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <SearchView        android:id="@+id/search_view"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:iconifiedByDefault="true"        android:inputType="textCapWords"        android:imeOptions="actionSearch"        android:queryHint="" /></RelativeLayout>   xml中主要配置有四个属性，如下：android:iconifiedByDefault表示搜索图标是否在输入框内。true效果更加android:imeOptions设置IME options，即输入法的回车键的功能，可以是搜索、下一个、发送、完成等等。这里actionSearch表示搜索android:inputType输入框文本类型，可控制输入法键盘样式，如numberPassword即为数字密码样式android:queryHint输入框默认文本SearchView的几个主要函数setOnCloseListener(SearchView.OnCloseListener listener)表示点击取消按钮listener，默认点击搜索输入框setOnQueryTextListener(SearchView.OnQueryTextListener listener)表示输入框文字listener，包括public boolean onQueryTextSubmit(String query)开始搜索listener，public boolean onQueryTextChange(String newText)输入框内容变化listener，两个函数java部分实现：package cn.trinea.android.demo;import java.util.concurrent.Executors;import java.util.concurrent.ScheduledExecutorService;import java.util.concurrent.ScheduledFuture;import java.util.concurrent.TimeUnit;import android.app.ActionBar;import android.app.ActionBar.LayoutParams;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Gravity;import android.view.LayoutInflater;import android.view.MenuItem;import android.view.View;import android.view.WindowManager;import android.widget.SearchView;import android.widget.SearchView.OnCloseListener;import android.widget.Toast;public class SearchViewDemo extends Activity {    private SearchView               searchView;    private Context                  context;    private MyHandler                handler;    // schedule executor    private ScheduledExecutorService scheduledExecutor = Executors.newScheduledThreadPool(10);    private String                   currentSearchTip;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.search_view_demo);        context = getApplicationContext();        handler = new MyHandler();        ActionBar actionBar = getActionBar();        actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_TITLE | ActionBar.DISPLAY_HOME_AS_UP                                    | ActionBar.DISPLAY_SHOW_CUSTOM);        setTitle(" ");        LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);        View customActionBarView = inflater.inflate(R.layout.search_view_demo_title, null);        searchView = (SearchView)customActionBarView.findViewById(R.id.search_view);        searchView.setIconified(false);        searchView.setOnCloseListener(new OnCloseListener() {            @Override            public boolean onClose() {                // to avoid click x button and the edittext hidden                return true;            }        });        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {            public boolean onQueryTextSubmit(String query) {                Toast.makeText(context, "begin search", Toast.LENGTH_SHORT).show();                return true;            }            public boolean onQueryTextChange(String newText) {                if (newText != null && newText.length() > 0) {                    currentSearchTip = newText;                    showSearchTip(newText);                }                return true;            }        });        LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,                                               LayoutParams.WRAP_CONTENT, Gravity.CENTER_VERTICAL                                                                          | Gravity.RIGHT);        actionBar.setCustomView(customActionBarView, params);        // show keyboard getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE                                        | WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);    }    public void showSearchTip(String newText) {        // excute after 500ms, and when excute, judge current search tip and newText        schedule(new SearchTipThread(newText), 500);    }    class SearchTipThread implements Runnable {        String newText;        public SearchTipThread(String newText){            this.newText = newText;        }        public void run() {            // keep only one thread to load current search tip, u can get data from network here            if (newText != null && newText.equals(currentSearchTip)) {                handler.sendMessage(handler.obtainMessage(1, newText + " search tip"));            }        }    }    public ScheduledFuture<?> schedule(Runnable command, long delayTimeMills) {        return scheduledExecutor.schedule(command, delayTimeMills, TimeUnit.MILLISECONDS);    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        switch (item.getItemId()) {            case android.R.id.home: {                onBackPressed();                return true;            }        }        return false;    }    private class MyHandler extends Handler {        @Override        public void handleMessage(Message msg) {            switch (msg.what) {                case 1:                    Toast.makeText(context, (String)msg.obj, Toast.LENGTH_SHORT).show();                    break;            }        }    }}上面代码在onQueryTextChange函数即输入框内容每次变化时将一个数据获取线程SearchTipThread放到ScheduledExecutorService中，500ms后执行，在线程执行时判断当前输入框内容和要搜索内容，若相等则继续执行，否则直接返回，避免不必要的数据获取和多个搜索提示同时出现。 getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE| WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);表示默认输入法弹出 编辑框内容为空点击取消的x按钮，编辑框收缩，可在onClose中返回trueJava1234567   searchView.setOnCloseListener(new OnCloseListener() { @Overridepublic boolean onClose() {return true;}});searchView.onActionViewExpanded();表示在内容为空时不显示取消的x按钮，内容不为空时显示.searchView.setSubmitButtonEnabled(true);编辑框后显示search按钮，个人建议用android:imeOptions=”actionSearch”代替。隐藏输入法键盘   InputMethodManager inputMethodManager;inputMethodManager = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);private void hideSoftInput() {if (inputMethodManager != null) {View v = SearchActivity.this.getCurrentFocus();if (v == null) {return;}inputMethodManager.hideSoftInputFromWindow(v.getWindowToken(),   InputMethodManager.HIDE_NOT_ALWAYS);searchView.clearFocus();}}其中SearchActivity为Activity的类名
0 0