在按鈕上添加一個浮動上下文菜單

我想向android中的按鈕添加一個浮動上下文菜單。我怎樣才能創建一個監聽器我怎樣才能使用該項目知道哪個按鈕調用菜單？在按鈕上添加一個浮動上下文菜單

@Override 
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { 
    super.onCreateContextMenu(menu, v, menuInfo); 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.menu_1, menu); 
} 

@Override 
public boolean onContextItemSelected(MenuItem item) { 
    if (item.getGroupId() == R.id.button2) 
     Toast.makeText(MainActivity.this, "1", Toast.LENGTH_SHORT).show(); 
    else 
    if (item.getGroupId() == R.id.button3) 
     Toast.makeText(MainActivity.this, "2", Toast.LENGTH_SHORT).show(); 
    return true; 
}

來源

2016-12-27 Aditya Vijayvergia

這可能有幫助。

activity_main.xml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"> 

    <Button 
     android:id="@+id/button1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Button 1" /> 

    <Button 
     android:id="@+id/button2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Button 2" /> 

</LinearLayout>

ActivityMain.java

package com.shyra.contextmenu; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.ContextMenu; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.Toast; 


public class MainActivity extends AppCompatActivity { 

    Button button1, button2; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     button1 = (Button) findViewById(R.id.button1); 
     button2 = (Button) findViewById(R.id.button2); 

     registerForContextMenu(button1); 
     registerForContextMenu(button2); 
    } 

    @Override 
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { 
     super.onCreateContextMenu(menu, v, menuInfo); 

     if (v.getId() == R.id.button1) { 
      menu.setHeaderTitle("Context Menu"); 
      getMenuInflater().inflate(R.menu.menu_button1, menu); 
     } else if (v.getId() == R.id.button2) { 
      menu.add(v.getId(), 0, Menu.NONE, "Option 1"); 
      menu.add(v.getId(), 1, Menu.NONE, "Option 2"); 
      menu.add(v.getId(), 2, Menu.NONE, "Option 3"); 
     } 
    } 

    @Override 
    public boolean onContextItemSelected(MenuItem item) { 
     if (item.getTitle().equals("Action 1")) { 
      Toast.makeText(getApplicationContext(), "Action 1 pressed", Toast.LENGTH_SHORT).show(); 
     } else if (item.getTitle().equals("Action 2")) { 
      Toast.makeText(getApplicationContext(), "Action 2 pressed", Toast.LENGTH_SHORT).show(); 
     } else if (item.getTitle().equals("Action 3")) { 
      Toast.makeText(getApplicationContext(), "Action 3 pressed", Toast.LENGTH_SHORT).show(); 
     } else if (item.getGroupId() == R.id.button2) { 
      if (item.getItemId() == 0) { 
       Toast.makeText(getApplicationContext(), "Option 1 pressed", Toast.LENGTH_SHORT).show(); 
      } else if (item.getItemId() == 1) { 
       Toast.makeText(getApplicationContext(), "Option 2 pressed", Toast.LENGTH_SHORT).show(); 
      } else if (item.getItemId() == 2) { 
       Toast.makeText(getApplicationContext(), "Option 3 pressed", Toast.LENGTH_SHORT).show(); 
      } 
     } 
     return true; 
    } 
}

menu_button1.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:app="http://schemas.android.com/apk/res-auto" 
     xmlns:tools="http://schemas.android.com/tools" 
     tools:context="com.osahub.rachit.contextmenu.MainActivity"> 
    <item 
     android:id="@+id/action_1" 
     android:title="Action 1" 
     app:showAsAction="never"/> 
    <item 
     android:id="@+id/action_2" 
     android:title="Action 2" 
     app:showAsAction="never"/> 
    <item 
     android:id="@+id/action_3" 
     android:title="Action 3" 
     app:showAsAction="never"/> 
</menu>

來源

2016-12-27 10:51:55 Rachit

但如果兩個按鈕可以調用菜單，然後我怎麼能知道哪個按鈕調用菜單（如果我想對該按鈕進行一些更改）？ –

看看我的編輯。上述上下文菜單用於2個按鈕。 ItemSelected句柄使用GroupID和ItemID。 – Rachit

我已經在一個單獨的菜單文件中使用了創建的菜單，就像在我的編輯中一樣。 –

在按鈕上添加一個浮動上下文菜單

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