कस्टम डायलॉग में डेटा कैसे अपडेट करें

यहाँ कस्टम संवाद वर्ग को संभालने का एक साफ-सुथरा तरीका है!

आप MyDialog . बना सकते हैं क्लास में बिल्डर क्लास शामिल है ताकि यह बटनऑनक्लिक विधियों और टेक्स्ट डेटा को संभाल सके।

my_dialog_layout.xml 4 संपादन टेक्स्ट (नाम, श्रेणी, मात्रा, महत्व) और 3 बटन (अपडेट, रद्द करें, ठीक) होना चाहिए, जैसा कि आपकी दूसरी तस्वीर में दिखाया गया है। मैं एक्सएमएल कोड पोस्ट नहीं करूंगा क्योंकि यह महत्वपूर्ण हिस्सा नहीं है।

तो सूची के OnItemClickListener में EditActivity . में देखें , आप कर सकते हैं

1. संवाद बनाएं
2. संपादित टेक्स्ट पर डिफ़ॉल्ट टेक्स्ट सेट करें
3. बटनों के लिए ऑनक्लिक लिस्टनर सेट करें

MyDialog वर्ग

public class MyDialog extends DialogFragment {

   public static final String SimpleName = MyDialog.class.getSimpleName();
   private EditText name,category, quantity, importance;
   private Button update, positive, negative;
   private Builder builder;

    private static MyDialog instance = new MyDialog();

    public static MyDialog getInstance(){
        return instance;
    }

   @Override
    public void onCreate(Bundle savedInstanceState) {
        this.setCancelable(true);

        if (savedInstanceState != null) {
            if (builder != null) {
                builder = savedInstanceState.getParcelable(Builder.class.getSimpleName());
            }
        }
        setRetainInstance(true);
        super.onCreate(savedInstanceState);
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Dialog dialog = super.onCreateDialog(savedInstanceState);
        // make the dialog's default background transparent so that you can customize the window
        dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
        dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        return dialog;
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.my_dialog_layout, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable final Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        initViews(view);
        if (builder != null) {

            if (builder.getTextName() != null) {
                name.setText(builder.getTextName());
            }
            if (builder.getTextCategory() != null) {
                category.setText(builder.getTextCategory());
            }
            if (builder.getTextQuantity() != null) {
                quantity.setText(builder.getTextQuantity());
            }
            if (builder.getTextImportance() != null) {
                importance.setText(builder.getTextImportance());
            }



            update.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    builder.getOnUpdateClicked().OnClick(view, getDialog());
                }
            });

            positive.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                   builder.getOnPositiveClicked().OnClick(view, getDialog());
                }
            });

            negative.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                  builder.getOnNegativeClicked().OnClick(view, getDialog());
                }
            });

        }
    }

    private void initViews(View view) {       
        name = (EditText) view.findViewById(R.id.editText_name);
        category = (EditText) view.findViewById(R.id. editText_category);
        quantity = (EditText) view.findViewById(R.id. editText_quantity);
        importance = (EditText) view.findViewById(R.id.editText_importance);
        update = (Button) view.findViewById(R.id.update);
        positive = (Button) view.findViewById(R.id.positive);
        negative = (Button) view.findViewById(R.id.negative);

    }

    private Dialog show(Activity activity, Builder builder) {             
         this.builder = builder;
         if (!isAdded()){
             show(((AppCompatActivity) activity).getSupportFragmentManager(), SimpleName);
         }
         return getDialog();
     }

    public static class Builder implements Parcelable  {

        private OnPositiveClicked onPositiveClicked;
        private OnNegativeClicked onNegativeClicked;
        private OnUpdateClicked onUpdateClicked;

        private textName;
        private textCategory;
        private textQuantity;
        private textImportance;

        private Context context;

        protected Builder(Parcel in) {
            textName = in.readString();
            textCategory = in.readString();
            textQuantity = in.readString();
            textImportance = in.readString();
        }

        public static final Creator<Builder> CREATOR = new Creator<Builder>() {
            @Override
            public Builder createFromParcel(Parcel in) {
                return new Builder(in);
            }

            @Override
            public Builder[] newArray(int size) {
                return new Builder[size];
            }
        };

        public Context getContext() {
            return context;
        }

        public Builder setActivity(Context context) {
            this.context = context;
            return this;
        }

        public Builder(Context context) {
            this.context = context;
        }

        public Builder setTextName(String textName) {
            this.textName = textName;
            return this;
        }

        public String getTextName() {
            return textName;
        }

        public Builder setTextCategory(String textCategory) {
            this.textCategory = textCategory;
            return this;
        }

        public String getTextCategory() {
            return textCategory;
        }

        public Builder setTextQuantity(String textQuantity) {
            this.textQuantity = textQuantity;
            return this;
        }

        public String getTextQuantity() {
            return textQuantity;
        }

        public Builder setTextImportance(String textImportance) {
            this.textImportance = textImportance;
            return this;
        }

        public String getTextImportance() {
            return textImportance;
        }


        public OnPositiveClicked getOnPositiveClicked() {
            return onPositiveClicked;
        }

        public Builder setOnPositiveClicked(OnPositiveClicked onPositiveClicked) {
            this.onPositiveClicked = onPositiveClicked;
            return this;
        }

        public OnNegativeClicked getOnNegativeClicked() {
            return onNegativeClicked;
        }

        public Builder setOnNegativeClicked(OnNegativeClicked onNegativeClicked) {
            this.onNegativeClicked = onNegativeClicked;
            return this;
        }

        public OnUpdateClicked getOnUpdateClicked() {
            return onUpdateClicked;
        }

        public Builder setOnUpdateClicked(OnUpdateClicked onUpdateClicked) {
            this.onUpdateClicked = onUpdateClicked;
            return this;
        }

        public Builder build() {
            return this;
        }

        public Dialog show() {
            return getInstance().show(((Activity) context), this);
        }

        @Override
        public int describeContents() {
            return 0;
        }

        @Override
        public void writeToParcel(Parcel parcel, int i) {
            parcel.writeString(textName);
            parcel.writeString(textCategory);
            parcel.writeString(textQuantity);
            parcel.writeString(textImportance);
        }

    }

    public interface OnPositiveClicked {
        void OnClick(View view, Dialog dialog);
    }

    public interface OnNegativeClicked {
        void OnClick(View view, Dialog dialog);
    }


}

गतिविधि संपादित करें

MyDialog को एक सूचीदृश्य OnItemClickListner में बनाएं और दिखाएं।

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            MyDialog.Builder dialog=null;

            // TODO get the strings from database at the position i
            String name = 
            String category = 
            String quantity = 
            String importance = 

            dialog.setTextName(name)
                .setTextCategory(category)
                .setTextQuantity(quantity)
                .setTextImportance(importance)
                .setOnPositiveClicked(new MyDialog.OnPositiveClicked() { 
                             @Override
                            public void OnClick(View view, Dialog dialog) {

                            }
                        })
                .setOnNegativeClicked(new MyDialog.OnNegativeClicked() { 
                            @Override
                            public void OnClick(View view, Dialog dialog) {

                            }
                        })
                .setOnUpdateClicked(new MyDialog.OnUpdateClicked() { 
                            @Override
                            public void OnClick(View view, Dialog dialog) {
                                // TODO update database here
                            }
                        })

                .build();
                dialog.show();
        }
    });

आशा है कि इससे सहायता मिलेगी। अगर कोई गलती हो या कोई बेहतर तरीका हो तो मुझे बताएं।