Question

android怎么使用SearchView啊

onSearchRequested（）；弹不出那个东西啊 。具体是怎么一个使用流程。求大侠们教教我 。找了很多资料都感觉讲的不全面啊。

Answer 1

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true

Java

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searchView.setOnCloseListener(new OnCloseListener() {

@Override
public 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

Answer 2

在菜单里面声明一个条目并设置android:actionViewClass="android.widget.SearchView"，在对应的Activity中实现OnQueryTextListener接口并重写onQueryTextSubmit方法。