限制按鈕只能點擊一次

Question

我有一個活動，在按鈕點擊（mConfirm2）時，它將把用戶帶到一個新的活動。問題是，如果用戶偶然在按鈕上多次點擊而不是收到意外錯誤，因此我相信唯一的解決方案就是隻允許一次點擊，不管用戶點擊多少次在按鈕上，它只會計算第一次點擊。

下面是活動

public class CasualEventsSingleItemActivity extends Activity { 

    // Declare Variables 
    String list_item_name; 
    String list_item_description; 
    String list_item_bac; 

    String list_item_price; 
    String list_item_location; 

    String list_item_purchase_code; 
    String single_list_item_description; 




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


     ImageLoader mImageLoader = new ImageLoader(Volley.newRequestQueue(this), 
       new ImageLoader.ImageCache() { 
      private final LruCache<String, Bitmap> 
        cache = new LruCache<String, Bitmap>(20); 

      @Override 
      public Bitmap getBitmap(String url) { 
       return cache.get(url); 
      } 

      @Override 
      public void putBitmap(String url, Bitmap bitmap) { 
       cache.put(url, bitmap); 
      } 
     }); 


     Intent i = getIntent(); 
     list_item_name = i.getStringExtra("list_item_name"); 
     list_item_location = i.getStringExtra("list_item_location"); 
     list_item_bac = i.getStringExtra("list_item_bac"); 
     list_item_price = i.getStringExtra("list_item_price"); 
     list_item_purchase_code = i.getStringExtra("list_item_purchase_code"); 


     single_list_item_description = i.getStringExtra("single_list_item_description"); 

     TextView txtname = (TextView) findViewById(R.id.name); 
     TextView txtlocation = (TextView) findViewById(R.id.location); 
     TextView txtsdescription = (TextView) findViewById(R.id.sdescription); 


     NetworkImageView hsvimage1 = (NetworkImageView) findViewById(R.id.hsvimage1); 
     NetworkImageView hsvimage2 = (NetworkImageView) findViewById(R.id.hsvimage2); 
     NetworkImageView hsvimage3 = (NetworkImageView) findViewById(R.id.hsvimage3); 

     // Get image URLs from your previous network request... 
     // I could not determine where this is stored from code in your question. 
     String url1 = list_item_bac; // e.g. http://example.com/images/image1.png 
     String url2 = list_item_bac; 
     String url3 = list_item_bac; 

     // Set the URL of the image that should be loaded into this view, and 
     // specify the ImageLoader that will be used to make the request. 
     hsvimage1.setImageUrl(url1, mImageLoader); 
     hsvimage2.setImageUrl(url2, mImageLoader); 
     hsvimage3.setImageUrl(url3, mImageLoader); 

     // Set results to the TextViews 
     txtname.setText(list_item_name); 
     txtlocation.setText(list_item_location); 
     txtsdescription.setText(single_list_item_description); 


     Button mConfirm2 = (Button)findViewById(R.id.bConfirm2); 
     mConfirm2.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       ParseUser currentUser = ParseUser.getCurrentUser(); 

       // Create the class and the columns 
       currentUser.saveInBackground(); 


       currentUser.put("ActivityName", list_item_name); 

       currentUser.saveInBackground(new SaveCallback() { 
        @Override 
        public void done(ParseException e) { 
         setProgressBarIndeterminateVisibility(false); 

         if (e == null) { 
          // Success! 
          Intent intent = new Intent(CasualEventsSingleItemActivity.this, usermatch.class); 
          intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
          intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
          startActivity(intent); 
         } 
         else { 
          AlertDialog.Builder builder = new AlertDialog.Builder(CasualEventsSingleItemActivity.this); 
          builder.setMessage(e.getMessage()) 
           .setTitle(R.string.signup_error_title) 
           .setPositiveButton(android.R.string.ok, null); 
          AlertDialog dialog = builder.create(); 
          dialog.show(); 
         } 
        } 
       }); 
       //CasualEventsSingleItemActivity.this.startActivity(new Intent(CasualEventsSingleItemActivity.this, MatchingActivity.class)); 
      } 
     }); 


    } 
} 

Answer 1

只需添加的setEnabled（假）到您的onclick方法

 Button mConfirm2 = (Button)findViewById(R.id.bConfirm2); 
     mConfirm2.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       mConfirm2.setEnabled(false); 
       ParseUser currentUser = ParseUser.getCurrentUser(); 

       // Create the class and the columns 
       currentUser.saveInBackground(); 


       currentUser.put("ActivityName", list_item_name); 

       currentUser.saveInBackground(new SaveCallback() { 
        @Override 
        public void done(ParseException e) { 
         setProgressBarIndeterminateVisibility(false); 

         if (e == null) { 
          // Success! 
          Intent intent = new Intent(CasualEventsSingleItemActivity.this, usermatch.class); 
          intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
          intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
          startActivity(intent); 
         } 
         else { 
          AlertDialog.Builder builder = new AlertDialog.Builder(CasualEventsSingleItemActivity.this); 
          builder.setMessage(e.getMessage()) 
           .setTitle(R.string.signup_error_title) 
           .setPositiveButton(android.R.string.ok, null); 
          AlertDialog dialog = builder.create(); 
          dialog.show(); 
         } 
        } 
       }); 
       //CasualEventsSingleItemActivity.this.startActivity(new Intent(CasualEventsSingleItemActivity.this, MatchingActivity.class)); 
      } 
     });