如何建立一個長按選單Contex Menu(按下超過1秒出現選單，相當於window電腦的按右鍵快顯功能表)



注意：整個事件程式碼都必須放在
onCreate() 
{  
  在裡面要註冊;
}
在下面寫長按選單程式碼
..........................

範例：


import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.MenuItem;
import android.view.View;
import android.widget.LinearLayout;


	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		// 註冊長按選單 所適用範圍的物件名稱（可以是button, LinearLayout.....)
        	LinearLayout layout = (LinearLayout) findViewById(R.id.LinearLayout1); 
        	registerForContextMenu(layout); 
		
	}// end of onCreate()



    private static final int MENU_1 = 0;
    private static final int MENU_2 = 1;
    private static final int MENU_3 = 2;
	public void onCreateContextMenu(ContextMenu menu, View v,
			ContextMenuInfo menuInfo) {
		super.onCreateContextMenu(menu, v, menuInfo);
		menu.setHeaderTitle("設定長按快顯功能表的標題");
		// 新增選單的選項
		menu.add(Menu.NONE, MENU_1, 0, "選項1"); 
		menu.add(Menu.NONE, MENU_2, 0, "選項2"); 
		menu.add(Menu.NONE, MENU_3, 0, "選項3"); 
	}// end of onCreateContextMenu()


	@Override
	public boolean onContextItemSelected(MenuItem item) {
		// 設定所適用範圍的物件名稱（可以是button, LinearLayout.....)
		LinearLayout layout = (LinearLayout) findViewById(R.id.LinearLayout1); 
	       
		switch(item.getItemId()){
        	case MENU_1:
        		
              		break;
        	case MENU_2:
        		
              		break;
        	case MENU_3:
        		
              		break;
        	}      
		return super.onContextItemSelected(item);
	}// end of onContextItemSelected()


	
	
}