Android：我无法制作collapseActionView

Question

我想做出类似的事情：

我尝试将弹出菜单设置为折叠视图，即操作栏。但我尝试了我在互联网上发现的所有东西，没有找到解决方案。我不需要支持少于15的android api。

这是main.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="@string/action_settings"/>
    <item android:id="@+id/action_search"
          android:icon="@android:drawable/ic_dialog_email"
          android:title="@string/hello_world"
          android:showAsAction="always|collapseActionView"
          />
    <item android:id="@+id/action_compose"
          android:icon="@android:drawable/btn_star"
          android:title="@string/hello_world" 
          android:showAsAction="never"
          />
    <item android:id="@+id/action_compose2"
          android:icon="@android:drawable/btn_star"
          android:title="@string/hello_world" 
          android:showAsAction="never"
          />
</menu>

这是我的活动：

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ActionBar a = getActionBar();
        a.setTitle("Mariano");


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu items for use in the action bar
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);
        MenuItem menuItem = menu.findItem(R.id.action_search);

        MenuItemCompat.setOnActionExpandListener(menuItem, new OnActionExpandListener() {

            @Override
            public boolean onMenuItemActionExpand(MenuItem arg0) {
                // TODO Auto-generated method stub
                return false;
            }

            @Override
            public boolean onMenuItemActionCollapse(MenuItem arg0) {
                // TODO Auto-generated method stub
                return false;
            }
        });

        return super.onCreateOptionsMenu(menu);
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        return false;
    }
}

Answer 1

如果我理解正确，您可以点击Android Popup Menu打开Button。然后，您只需将此添加到MainActivity：

 button1 = (Button) findViewById(R.id.button1);  
      button1.setOnClickListener(new OnClickListener() {  

       @Override  
       public void onClick(View v) {  
        //Creating the instance of PopupMenu  
        PopupMenu popup = new PopupMenu(MainActivity.this, button1);  
        //Inflating the Popup using xml file  
        popup.getMenuInflater().inflate(R.menu.popup_menu, popup.getMenu());  

        //registering popup with OnMenuItemClickListener  
        popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {  
         public boolean onMenuItemClick(MenuItem item) {  
               int i = item.getItemId();
                        if (i == R.id.id1) {
                            //do something
                            return true;
                        }
                        else if (i == R.id.id2){
                            //do something
                        }
                        else if (i == R.id.id3) {
                            //do something
                            return true;
                        }
                        else if (i == R.id.id4) {
                            //do something
                            return true;
                        }else {
                            return onMenuItemClick(item);
                        }
        });  

        popup.show();//showing popup menu  
       }  
      });//closing the setOnClickListener method  
     }