Question

您好我正在尝试在一个活动中创建多个上下文菜单。有两个按钮，我想为每个按钮创建不同的上下文菜单。有人可以建议我或推荐我一些有用的例子吗？

这是我目前的代码。

registerForContextMenu(btn_1);
registerForContextMenu(btn_2);


btn_1.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v) {

        openContextMenu(v);
    }   
});

btn_2.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v) {

        openContextMenu(v);
    }   

});


    }

@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        getMenuInflater().inflate(R.menu.media_menu, menu);
        menu.setHeaderTitle("Context menu for btn_1");
        menu.setHeaderIcon(R.drawable.icon_media_up); 
}

@Override
public boolean onContextItemSelected(MenuItem item) {
        switch(item.getItemId()) {
            case R.id.photo:
                Toast.makeText(this, "One", Toast.LENGTH_SHORT).show();
                return true;
            case R.id.video:
                Toast.makeText(this, "Two", Toast.LENGTH_SHORT).show();
                return true;
            case R.id.audio:
                Toast.makeText(this, "Three", Toast.LENGTH_SHORT).show();
                return true;
            }
        return super.onContextItemSelected(item);
    }

Answer 1

您必须在onCreateContextMenu方法中处理此问题。有一个参数View，它是您点击的视图。因此，通过使用该参数，您可以膨胀不同的菜单。例如

@Override
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        if(v.getId() == R.id.first_button)
             inflate one menu
        else if(v.getId() == R.id.second_button)
             inflate another menu        
}

Answer 2

@覆盖 public void onCreateContextMenu（ContextMenu菜单，View v， ContextMenuInfo menuInfo）{ // TODO自动生成的方法存根 super.onCreateContextMenu（menu，v，menuInfo）;

 MenuInflater menuiflatr=getMenuInflater();
     if(v.getId() == R.id.ChooseSession){


    menuiflatr.inflate(R.menu.session_menu, menu);
     menu.setHeaderTitle("Choose Session Type");
     menu.setHeaderIcon(R.drawable.ic_launcher);
     MenuItem item_individual=menu.findItem(R.id.individual);
     MenuItem item_group=menu.findItem(R.id.group);
     if(itemselection_for_sessiontype==1)item_individual.setChecked(true);
     else if(itemselection_for_sessiontype==2)item_group.setChecked(true);
}
    else if(v.getId() == R.id.ChooseTrajectory){
         //inflate another menu     
         menuiflatr.inflate(R.menu.trajectory_menu, menu);
         menu.setHeaderTitle("Enable Trajectory");
         menu.setHeaderIcon(R.drawable.ic_launcher);
         MenuItem item_On=menu.findItem(R.id.on);
         MenuItem item_Off=menu.findItem(R.id.off);
         if(itemselection_for_trajectory==1)item_On.setChecked(true);
         else if(itemselection_for_trajectory==2)item_Off.setChecked(true);
}
    else if(v.getId() == R.id.ChooseMapeType){
        //inflate another menu     
        menuiflatr.inflate(R.menu.maptype_menu, menu);
        menu.setHeaderTitle("Choose Map Type");
     menu.setHeaderIcon(R.drawable.ic_launcher);
   }

} @覆盖 public boolean onContextItemSelected（MenuItem item）{ 开关（item.getItemId（））{ 案例R.id.individual： Toast.makeText（this，＆＃34; Session Type Individual selected！＆＃34;， Toast.LENGTH_SHORT）.show（）; item.setChecked（真）; itemselection_for_sessiontype = 1; return true;

case R.id.group:
    Toast.makeText(this, "Session Type Group selected!", Toast.LENGTH_SHORT).show();
    item.setChecked(true);
    itemselection_for_sessiontype=2;
    return true;

case R.id.on:
    Toast.makeText(this, "Trajectory Mode Enabled", Toast.LENGTH_SHORT).show();
    item.setChecked(true);
    itemselection_for_trajectory=1;
    return true;

case R.id.off:
    Toast.makeText(this, "Trajectory Mode Disabled!",               Toast.LENGTH_SHORT).show();
    item.setChecked(true);
    itemselection_for_trajectory=2;
    return true;
}





return super.onContextItemSelected(item);
}

public void selectSession(View view){
    registerForContextMenu(view);

    openContextMenu(view);
}

在一个活动中创建多个上下文菜单

2 个答案: