使用对话框android时长按菜单不起作用

Posted 2023-02-27

【中文标题】使用对话框android时长按菜单不起作用

【英文标题】：long press menu not working when using dialog android

【发布时间】：2015-03-09 16:54:43

【问题描述】：

当对话框打开时，我在我的活动中使用长按菜单。 当我点击菜单选项时，它显示得很好，但什么也不做。

我想在单击“关闭”菜单选项时关闭对话框

请对此提出更好的建议， 这是我的代码

ImageView img,image,image1,image2;
Bitmap a;
String f,s;
SharedPreferences pref;
Editor editor;
private static int RESULT_LOAD_IMG = 3;
String imgDecodableString;


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


    pref = getApplicationContext().getSharedPreferences("MyPref", MODE_PRIVATE); 
    editor = pref.edit();


    img = (ImageView)findViewById(R.id.imageView1);


    Button getSignature = (Button) findViewById(R.id.getSign);


    getSignature.setOnClickListener(new View.OnClickListener() 
        public void onClick(View view) 

            makdrtd();

        
    );


protected void makdrtd() 
    // TODO Auto-generated method stub
    final Dialog dialog = new Dialog(this);
    dialog.setContentView(R.layout.signdialog);
    dialog.setTitle("Pen Size");


    Button make = (Button) dialog.findViewById(R.id.makesign1);
    image = (ImageView) dialog.findViewById(R.id.saveimg);
    image1 = (ImageView) dialog.findViewById(R.id.saveimg1);

    registerForContextMenu(image);


            dialog.show();



@Override   
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)  
  
        super.onCreateContextMenu(menu, v, menuInfo);  
        menu.setHeaderTitle("Select The Action");    
        menu.add(0, v.getId(), 0, "Close");//groupId, itemId, order, title   
        menu.add(0, v.getId(), 0, "SMS");   


@Override    
public boolean onContextItemSelected(MenuItem item)    
        if(item.getTitle()=="Close")  
            image.setImageBitmap(null);  

            
        else if(item.getTitle()=="SMS")  
            Toast.makeText(getApplicationContext(),"sending sms code",Toast.LENGTH_LONG).show();  
        else  
           return false;  
            
      return true;    
     

public void function1(int id)  
    Toast.makeText(this, "function 1 called", Toast.LENGTH_SHORT).show();  
  
public void function2(int id)  
    Intent i = new Intent(MainActivity.this, SWork.class);
    startActivity(i);

  






    

【问题讨论】：

看起来你只需要给 make 按钮一个点击监听器

【参考方案1】：

protected void makdrtd() 
    Context context = this.getApplicationContext();
    final Dialog dialog = new Dialog(context);
    dialog.setContentView(R.layout.signdialog);
    dialog.setTitle("Pen Size");

    ImageView image = (ImageView) dialog.findViewById(R.id.saveimg);
    ImageView image1 = (ImageView) dialog.findViewById(R.id.saveimg1);
    Button make = (Button) dialog.findViewById(R.id.makesign1);
    registerForContextMenu(image);
    dialog.show();

    image1.setOnLongClickListener(new OnLongClickListener() 
        @Override
        public boolean onLongClick(View v) 
            AlertDialog.Builder ADB = new AlertDialog.Builder(context);
            ADB.setTitle("Title of second dialog");
            ADB.setMessage("Message to show user.");
            ADB.setNeutralButton("ButtonText", new DialogInterface.OnClickListener() 
                @Override
                public void onClick(DialogInterface dialog, int which) 
                    if (dialog != null) 
                        dialog.dismiss();
                    
                
            );
            AlertDialog dialog2 = ADB.show();
            return true;
        
    );

【讨论】：

我不会在单击按钮时关闭对话框。当图像按钮长按并选择删除选项时，我想要它

所以你想在长按时显示一个对话框并给出一个删除选项，也许还有一个取消选项？

如果你想长按另一个选项，那将是 2 个对话框

它不起作用。当我长按 image1 时，它会关闭我的应用程序

应用程序是崩溃了还是刚刚关闭？