Android 2-Way DataBinding mit benutzerdefinierter Ansicht und benutzerdefiniertem Attr

Question

Ich habe 2-Wege-Databinding für eine grundlegende Anwendung verwendet, es lief ziemlich gut, bis ich mit benutzerdefinierten Ansichten und attrs beginne.

Ich möchte eine benutzerdefinierte Ansicht erstellen, mit einem Textview und eine EditText, und verwenden Sie es in einem anderen Layout:

<TextView 
    android:text="Holder" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/tvTitle" 
    android:layout_weight="1" /> 

<EditText 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:inputType="none" 
    android:text="Name" 
    android:ems="10" 
    android:id="@+id/etAnwser" 
    android:layout_weight="1" /> 

und ich habe die Gewohnheit attr für sie

<resources> 
<declare-styleable name="form_item"> 
    <attr name="tvTitle" format="string" /> 
    <attr name="anwserHint" format="string" /> 
    <attr name="anwserText" format="string" /> 
    <attr name="android:enabled" /> 
</declare-styleable> 

im Fragment i Sie wie folgt vor:

<rhcloud.com.financialcontrol.tabutil.FormItem 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:enabled="@{state.get()}" 
      form_item:anwserText='@={expense.description}' 
      form_item:tvTitle="Description:" /> 

Es ist schön hat 1-Wege databind funktioniert, aber was auch immer ich den Text zu ändern, er mir nicht den Rückruf in der Klasse senden

@InverseBindingMethods(value = { 
     @InverseBindingMethod(type = FormItem.class, attribute = "anwserText"), 
}) 
public class FormItem extends LinearLayout { 

    private TextView tvTitle; 
    private EditText etAnwser; 

    public FormItem(@NonNull Context context) { 
     super(context); 
     LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

     inflater.inflate(R.layout.form_item, this); 

     tvTitle = (TextView) findViewById(R.id.tvTitle); 
     etAnwser = (EditText) findViewById(R.id.etAnwser); 
    } 

    public FormItem(@NonNull Context context, @NonNull String title) { 
     this(context); 
     setTvTitle(title); 
    } 

    public FormItem(@NonNull Context context, @NonNull String title, @NonNull String hint) { 
     this(context, title); 
     setAnwserHint(hint); 
    } 

    public FormItem(@NonNull Context context, @NonNull String title, @NonNull String hint, @NonNull String anwserText) { 
     this(context, title, hint); 
     setAnwserHint(anwserText); 
    } 


    public FormItem(@NonNull Context context, @NonNull AttributeSet attrs) { 
     super(context, attrs); 

     LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

     inflater.inflate(R.layout.form_item, this); 

     tvTitle = (TextView) findViewById(R.id.tvTitle); 
     etAnwser = (EditText) findViewById(R.id.etAnwser); 

     TypedArray a = context.getTheme().obtainStyledAttributes(
       attrs, 
       R.styleable.form_item, 
       0, 0); 

     try { 
      setTvTitle(a.getString(R.styleable.form_item_tvTitle)); 
      setAnwserHint(a.getString(R.styleable.form_item_anwserHint)); 
      setAnwserText(a.getString(R.styleable.form_item_anwserText)); 
      String isEnabled = a.getString(R.styleable.form_item_android_enabled); 
      if (isEnabled != null) { 
       setEnable(Boolean.parseBoolean(isEnabled)); 
      } 
     } finally { 
      a.recycle(); 
     } 
    } 

    public void setTvTitle(String title) { 
     tvTitle.setText(title); 
    } 

    public String getTvTitle() { 
     return tvTitle.getText().toString(); 
    } 

    public void setAnwserHint(String hint) { 
     etAnwser.setHint(hint); 
    } 

    public String getAnwserHint() { 
     return etAnwser.getHint().toString(); 
    } 

    public void setEnable(boolean isEnable) { 
     tvTitle.setEnabled(isEnable); 
     etAnwser.setEnabled(isEnable); 
    } 

    public void setAnwserText(String anwserText) { 
     etAnwser.setText(anwserText); 
    } 

    public String getAnwserText() { 
     return etAnwser.getText().toString(); 
    } 

    @InverseBindingAdapter(attribute = "form_item:anwserText") 
    public static String setOnAnwserTextAttrChanged(final String value){ 

     Log.d("Test","Calling InverseBindingAdapter: " + value); 
     return value; 
    } 


    @BindingAdapter(value = {"anwserTextAttrChanged"}, 
      requireAll = false) 
    public static void setOnAnwserTextAttrChanged(final FormItem view,final InverseBindingListener anwserTextAttrChanged){ 

     Log.d("Test","Calling BindingAdapter: " + view.getAnwserText()); 


    if(anwserTextAttrChanged == null){ 

     }else{ 
     Log.d("Test","Calling here"); 
      anwserTextAttrChanged.onChange(); 

     } 
    } 

    @BindingAdapter(value = {"android:enabled"}) 
    public static void customEnable(FormItem formItem, boolean isEnable) { 
     formItem.setEnable(isEnable); 
    } 
} 

Wer weiß, wie es richtig funktioniert?

Fully kann Code bei here

Answer 1

Dies funktioniert für mich zu finden:

Sie

@InverseBindingMethods(value = { 
     @InverseBindingMethod(type = FilterPositionView.class, attribute = "bind:filterStringValue", method = "getFilterValue", event = "android:filterStringValuetAttrChanged") 
}) 
public class FilterPositionView extends LinearLayout { 
    private FilterPositionBinding mBinding; 

    public FilterPositionView(Context context) { 
     super(context); 
     init(context); 
    } 

    public FilterPositionView(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     init(context); 
    } 

    public FilterPositionView(Context context, AttributeSet attrs, int defStyleAttr) { 
     super(context, attrs, defStyleAttr); 
     init(context); 
    } 

    public FilterPositionView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 
     super(context, attrs, defStyleAttr, defStyleRes); 
     init(context); 
    } 

    private void init(Context context) { 
     mBinding = DataBindingUtil.inflate(LayoutInflater.from(context), R.layout.filter_position, this, true); 
     setOrientation(HORIZONTAL); 

     mBinding.filterPositionCheck.setOnCheckedChangeListener((buttonView, isChecked) -> { 
      mBinding.filterPositionValue.setEnabled(isChecked); 
      if (!isChecked) mBinding.filterPositionValue.setText(""); 
     }); 
    } 

    /** 
    * Zwraca wpisywany text 
    * 
    * @return wpisane litery tekstu 
    */ 
    public String getFilterValue() { 
     return mBinding.filterPositionValue.getText().toString(); 
    } 

    @BindingAdapter(value = {"bind:filterTitle", "bind:filterStringValue", "bind:filterDateValue"}, requireAll = false) 
    public static void setFilterBinding(FilterPositionView positionView, String filterTitle, 
             String filterStringValue, Long filterDateValue) { 
     positionView.mBinding.filterPositionTitle.setText(filterTitle); 
     if (filterStringValue != null) 
      positionView.mBinding.filterPositionValue.setText(filterStringValue); 
     if (filterDateValue != null) 
      positionView.mBinding.filterPositionValue.setText(DateTimeFormatUtil.format(filterDateValue)); 
    } 

    @BindingAdapter(value = {"android:afterTextChanged", "android:filterStringValuetAttrChanged"}, requireAll = false) 
    public static void setTextWatcher(FilterPositionView filterPositionView, final TextViewBindingAdapter.AfterTextChanged after, 
             final InverseBindingListener textAttrChanged) { 
     TextWatcher newValue = new TextWatcher() { 

      @Override 
      public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
      } 

      @Override 
      public void onTextChanged(CharSequence s, int start, int before, int count) { 
      } 

      @Override 
      public void afterTextChanged(Editable s) { 
       if (after != null) { 
        after.afterTextChanged(s); 
       } 
       if (textAttrChanged != null) { 
        textAttrChanged.onChange(); 
       } 
      } 
     }; 
     TextWatcher oldValue = ListenerUtil.trackListener(filterPositionView.mBinding.filterPositionValue, newValue, R.id.textWatcher); 
     if (oldValue != null) { 
      filterPositionView.mBinding.filterPositionValue.removeTextChangedListener(oldValue); 
     } 
     filterPositionView.mBinding.filterPositionValue.addTextChangedListener(newValue); 
    } 
} 

Natürlich hinzufügen müssen @={} wie unten in der XML-Layouts:

<com.example.customviews.FilterPositionView 
       style="@style/verticalLabeledValueStyle" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       bind:filterTitle="@{@string/filter_product}" 
       bind:filterStringValue="@={sfmodel.product}"/>