popmenu的用法

 PopupMenu是用來在其所指定的view上顯示菜單，用法很簡單：

1.PopupMenu popupmenu = new PopupMenu(this,target view); 

它要綁定在誰身上，target view 就是誰

2.加載出該菜單

popupMenu.getMenuInflater().inflate(R.menu.main,popupMenu.getMenu());

3.顯示該popupmenu

popupmenu.show();

另外popupmenu有點擊menuItem的監聽方法。

代碼以下：

package com.example.popmenuexcercise; 
 
import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.PopupMenu; 
import android.widget.Toast; 
 
public class MainActivity extends Activity { 
 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_main); 
        final Button button=(Button) findViewById(R.id.button1); 
        button.setOnClickListener(new OnClickListener() { 
             
            @Override 
            public void onClick(View v) { 
                // TODO Auto-generated method stub 
                //第二個參數是該popupmenu將要依附於哪一個view上，若是該view下面有空間它就在下面顯示，不然在其上面 
                PopupMenu popupMenu=new PopupMenu(getApplicationContext(), button); 
                popupMenu.getMenuInflater().inflate(R.menu.main,popupMenu.getMenu()); 
                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { 
                     
                    @Override 
                    public boolean onMenuItemClick(MenuItem item) { 
                        // TODO Auto-generated method stub 
                        Toast.makeText(getApplicationContext(), item.getTitle(),1000).show(); 
                        return false; 
                    } 
                }); 
                //最後不要忘了調用show方法 
                popupMenu.show(); 
            } 
        }); 
    } 
 
     
 
}