15 Action View 以及监听 的使用

• menu 代码

  <menu xmlns:android="http://schemas.android.com/apk/res/android" >
  
  
      <!-- 
        android:actionViewClass=""  添加View   如果是系统提供的控件(包名.类名)
          ！！！！！showAsAction如果为never将失去效果！！！！！
          android:actionLayout="@layout/layout" 添加自定义的View  
       -->
      <item
          android:id="@+id/action_search"
          android:orderInCategory="100"
          android:showAsAction="always"
          android:actionViewClass="android.widget.SearchView"
          android:title="搜索"/>
      <item
          android:id="@+id/action_spinner"
          android:orderInCategory="100"
          android:showAsAction="collapseActionView"
          android:actionLayout="@layout/layout"
          android:title="spinner"/>
  
  </menu>
  

• MainActivity XMl布局文件

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical"
      tools:context=".MainActivity" >
  
      <TextView
          android:id="@+id/tv_show"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="@string/hello_world" />
  
      <Button 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:onClick="openClick"
          android:text="展开"
          />
      <Button 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:onClick="closeClick"
          android:text="折叠"
          />
  
  </LinearLayout>
  

• 一个自定义View（用于填充到menu中）

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical" >
  
      <Spinner
          android:id="@+id/spinner" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          />
  
  
  </LinearLayout>
  

• MainActivity 代码:

  package com.qf.day15_actionbar_demo02;
  
  import android.app.Activity;
  import android.os.Bundle;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.MenuItem.OnActionExpandListener;
  import android.view.View;
  import android.widget.ArrayAdapter;
  import android.widget.SearchView;
  import android.widget.SearchView.OnQueryTextListener;
  import android.widget.Spinner;
  import android.widget.TextView;
  import android.widget.Toast;
  
  public class MainActivity extends Activity {
  
      //SearchView searchView;
  
      private TextView tvSHow;
  
      private Menu menu;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          tvSHow = (TextView) findViewById(R.id.tv_show);
      }
  
      //打开
      public void openClick(View v){
          MenuItem item = menu.findItem(R.id.action_spinner);
          if(!item.isActionViewExpanded()){//判断是否展开
              item.expandActionView();//展开
          }
  
  
      }   
      //关闭
      public void closeClick(View v){
          MenuItem item = menu.findItem(R.id.action_spinner);
          if(item.isActionViewExpanded()){//判断是否展开
              item.collapseActionView();//关闭
          }
      }   
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          // Inflate the menu; this adds items to the action bar if it is present.
          getMenuInflater().inflate(R.menu.main, menu);
  
          this.menu = menu;
          //找出菜单项 
          MenuItem item = menu.findItem(R.id.action_search);
  
          //从菜单项里找出View
          SearchView searchView = (SearchView) item.getActionView();
  
          //设置查找的监听
          searchView.setOnQueryTextListener(new OnQueryTextListener() {
  
              //点击搜索按钮时  执行此方法
              @Override
              public boolean onQueryTextSubmit(String query) {
                  // TODO Auto-generated method stub
                  Toast.makeText(MainActivity.this, "=onQueryTextSubmit="+query, 0).show();
                  return false;
              }
  
              //文本改变时 执行此方法
              @Override
              public boolean onQueryTextChange(String newText) {
                  // TODO Auto-generated method stub
                  Toast.makeText(MainActivity.this, "=onQueryTextChange="+newText, 0).show();
                  return false;
              }
          });
  
          //找出菜单项
          MenuItem spinnerItem = menu.findItem(R.id.action_spinner);
          //找出layout布局
          View view = spinnerItem.getActionView();
          //从布局中找控件
          Spinner spinner = (Spinner) view.findViewById(R.id.spinner);
  
          String[] items = {"c","c++","php","java","android"};
  
          ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,
                  android.R.layout.simple_list_item_1, items);
  
          spinner.setAdapter(adapter);
  
  
          //展开和折叠的监听
          spinnerItem.setOnActionExpandListener(new OnActionExpandListener() {
  
              @Override
              public boolean onMenuItemActionExpand(MenuItem item) {
                  // TODO Auto-generated method stub
  
                  tvSHow.setText("==onMenuItemActionExpand===展开====");
                  return true;//返回false  不会折叠
              }
  
              @Override
              public boolean onMenuItemActionCollapse(MenuItem item) {
                  // TODO Auto-generated method stub
  
                  tvSHow.setText("==onMenuItemActionCollapse===折叠的====");
                  return true;
              }
          });
  
          return true;
      }
  
  }