限制按鈕單擊一次

Question

我有一個活動，在單擊按鈕（mConfirm2）時，它將帶用戶進行新的活動。 問題是，如果用戶無意中多次單擊按鈕，而我收到一個意外錯誤，因此，我相信唯一的解決方案是只允許單擊一次，無論用戶單擊多少次都無所謂在按鈕上，它只會計算第一次點擊。

以下是活動

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

只需將setEnabled（false）添加到您的onclick方法中

        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));
            }
        });