android.databinding.BindingAdapter Java Examples

@BindingAdapter("model")
public static void bindToModel(DiscreteSeekBar seekBar, final SeekBarModel model) {
    DiscreteSeekBar.NumericTransformer transformer = seekBar.getNumericTransformer();

    if (!(transformer instanceof NumericTransformer)) {
        transformer = new NumericTransformer();
        seekBar.setNumericTransformer(transformer);
    }

    final NumericTransformer customTransformer = (NumericTransformer) transformer;
    customTransformer.setValues(model.getMinValue(), model.getMaxValue());

    seekBar.setMin(0);
    seekBar.setMax(100);

    final int percentage = (int) customTransformer.transformToPercentage(model.getValue().get());
    // Bug in the library
    seekBar.setProgress(1);
    seekBar.setProgress(percentage);

    seekBar.setOnProgressChangeListener(
            SimpleOnProgressChangeListener.forStopTrackingTouch(seekBar1 -> {
                model.getValue().set(customTransformer.transformFromPercentage(seekBar.getProgress()));
            }));
}
 

@BindingAdapter(value = {"imageUrl", "placeholder", "sizeDevider"}, requireAll = false)
    public static void loadImage(ImageView view, String imageUrl, Drawable placeHolder, double sizeDevider) {
        if (imageUrl != null && imageUrl.isEmpty()) {
            imageUrl = null;
        }
        /*LOAD WITHOUT PLACE HOLDER*/
        if (imageUrl != null && !imageUrl.equalsIgnoreCase("")) {
            try {
                Glide.with(view.getContext())
                        .load(imageUrl)
//                    .error(R.drawable.ic_error)
                        .diskCacheStrategy(DiskCacheStrategy.NONE)
                        .skipMemoryCache(true)
                        .dontAnimate()
                        .into(view);
            } catch (Exception e) {
                view.setImageResource(R.drawable.ic_error);
            }
        } else {
            view.setImageResource(R.drawable.ic_product_placeholder);
            Log.d("Placeholder Image", imageUrl + "---" + view);
        }
    }
 

/**
 * (伪)双向 databinding: 同 {@link RecyclerViewAdapter#setDataTwoWay(RecyclerView, ListVM, List)}
 *
 * @param container
 * @param vm
 * @param datas
 * @param <T>
 */
@BindingAdapter({"vm", "data"})
public static <T> void setDataTwoWay(final ViewGroup container, final ListVM<T> vm, List<T> datas){
    if(vm == null){
        return ;
    }
    bind(container, vm, datas);

    if(vm instanceof TwoWayListVM){
        boolean isInited = container.getTag(R.id.db_inited) != null;
        if(!isInited) {
            container.setTag(R.id.db_inited, true);
            loadData(container, (TwoWayListVM<T>)vm, null, null);
        }
    }
}
 

/**
 * (伪)双向 databinding: 同 {@link RecyclerViewAdapter#setDataTwoWay(RecyclerView, ListVM, List)}
 *
 * @param container
 * @param vm
 * @param datas
 * @param <T>
 */
@BindingAdapter({"vm", "data"})
public static <T> void setDataTwoWay(final ViewPager container, final ListVM<T> vm, List<T> datas){
    if(vm == null){
        return ;
    }
    bind(container, vm, datas);

    if(vm instanceof TwoWayListVM) {
        boolean isInited = container.getTag(R.id.db_inited) != null;
        if (!isInited) {
            container.setTag(R.id.db_inited, true);
            loadData(container, (TwoWayListVM<T>) vm, null, null);
        }
    }
}
 

@BindingAdapter(value = {"fullFlexData", "postTreeViewModel"})
public static void fullFlexData(FlexboxLayout layout, TreeBean treeBean, PostTreeViewModel viewModel) {
    layout.removeAllViews();
    if (treeBean.getChildren() == null || treeBean.getChildren().size() == 0) return;
    Context context = layout.getContext();
    for (TreeBean tree : treeBean.getChildren()) {
        TextView textView = new TextView(context);
        textView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewHelper.dpToPx(context, 40)));
        textView.setTextColor(ContextCompat.getColor(context, R.color.textSecondary));
        textView.setBackgroundResource(R.drawable.btn_rounded_outline);
        textView.setGravity(Gravity.CENTER);
        textView.setFocusable(true);
        textView.setClickable(true);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            textView.setForeground(ContextCompat.getDrawable(context, R.drawable.ripple_theme_small));
        }
        textView.setText(tree.getName());
        textView.setOnClickListener(v -> viewModel.mTagClickEvent.setValue(treeBean.setCheckedChild(tree)));
        layout.addView(textView);
    }
}
 

@BindingAdapter({"bind:items"})
public static void populateDiagram(LineChart view, List<SingleValue> items) {

    if (null == items || items.size() == 0) {
        return;
    }
    List<Entry> entries = new ArrayList<>();
    for (int i = 0; i < items.size(); i++) {
        final SingleValue item = items.get(i);
        final Entry entry = new Entry(i, (float) item.getValue(), item);
        entries.add(entry);
    }
    LineDataSet dataSet = new LineDataSet(entries, view.getContext().getString(R.string.currency_value));
    LineData lineData = new LineData(dataSet);

    formatXAxisLabels(view, items);
    view.setData(lineData);
    view.invalidate();
}
 

@BindingAdapter("textRepeat")
public static void textRepeat(TextView view, long repeatDuration){
    if(repeatDuration != -1){
        final long[] duration = {0};
        final String[] unit = {""};

        zip(KEYS_MUL, KEYS_TIME)
            .forEach((mul, time) ->{
                if(repeatDuration % mul == 0){
                    duration[0] = repeatDuration / mul;
                    unit[0] = time;
                    return false;
                }

                return true;
            });

        if(duration[0] > 0){
            if(duration[0] == 1)
                view.setText(String.format("Every %s", unit[0]));
            else
                view.setText(String.format("Every %d %ss", (int)duration[0], unit[0]));
        }
    }
}
 

/**
 * Binding "messageSource" to display a message. Here Toast is used but more complex strategy may be applied.
 *
 * @param view the View which binds the message source.
 * @param oldMessageSource the last message source.
 * @param messageSource the message source.
 */
@BindingAdapter({"messageSource"})
@SuppressWarnings("PMD.CompareObjectsWithEquals")
public static void showMessage(@NonNull final View view, @Nullable final IMessageSource oldMessageSource,
        @Nullable final IMessageSource messageSource) {
    if (view == null || messageSource == null || oldMessageSource == messageSource) {
        return;
    }

    final int duration = messageSource.getType() == Type.ERROR ? Toast.LENGTH_LONG : Toast.LENGTH_SHORT;
    Toast.makeText(view.getContext(), messageSource.getMessageId(), duration).show();
}
 

/**
 * This is how you implement 2-way data binding of a custom attribute if you want to maintain
 * a custom listener interface - OnHueChangeListener, in this case - while also leveraging
 * the synthetic attributes hueAttrChanged (the InverseBindingListener). For an example of
 * how to implement custom 2-way binding with just the synthetic AttrChanged attribute's
 * InverseBindingListener, see DocumentView or LayerListView's currentLayer 2-way binding
 * (along with the InverseBindingMethod declarations in DocumentViewModelBindingAdapters).
 *
 * @param view                   The view we're 2-way binding to.
 * @param onHueChangeListener    The OnHueChangeListener bound by the developer on the view
 *                               in question.
 * @param inverseBindingListener Synthetic attribute representing an InverseBindingListener
 *                               for changes to the hue attribute.
 */
@BindingAdapter(value = {"onHueChange", "hueAttrChanged"}, requireAll = false)
public static void setListeners(HuePicker view,
                                final HuePicker.OnHueChangeListener onHueChangeListener,
                                final InverseBindingListener inverseBindingListener) {
    HuePicker.OnHueChangeListener newListener;
    if (inverseBindingListener == null) {
        // If the synthetic listener param is null, just keep track of the listener set in
        // the binding
        newListener = onHueChangeListener;
    } else {
        // Otherwise define a new listener to wraps both listeners and invoke them at the
        // right time within the new listener if they are non-null
        newListener = new HuePicker.OnHueChangeListener() {
            @Override
            public void onHueChange(HuePicker huePicker, float hue) {
                if (onHueChangeListener != null) {
                    onHueChangeListener.onHueChange(huePicker, hue);
                }
                inverseBindingListener.onChange();
            }
        };
    }

    // Use track listener to record listener we're adding and return any old listeners
    // registered through this method so that on rebind we don't add duplicate listeners
    HuePicker.OnHueChangeListener oldListener = ListenerUtil.trackListener(view, newListener,
            R.id.hueChangeListener);

    // Remove the old listener we set using this BindingAdapter, if there is one
    if (oldListener != null) {
        view.removeHueChangeListener(oldListener);
    }

    // Add our new listener
    if (newListener != null) {
        view.addHueChangeListener(newListener);
    }
}
 

@BindingAdapter({"iconRes"})
    public static void loadImage(ImageView iconView, int iconRes) {
//        Picasso.with(iconView.getContext())
//                .load(iconRes)
//                .into(iconView);
        //用Picasso真是大材小用了
        iconView.setImageResource(iconRes);
    }
 

/**
 * EditText重新获取焦点的事件绑定
 */
@BindingAdapter(value = {"requestFocus"}, requireAll = false)
public static void requestFocusCommand(EditText editText, final Boolean needRequestFocus) {
    if (needRequestFocus) {
        editText.setSelection(editText.getText().length());
        editText.requestFocus();
        InputMethodManager imm = (InputMethodManager) editText.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
    }
    editText.setFocusableInTouchMode(needRequestFocus);
}
 

@BindingAdapter(value = {"onCheckedChangedCommand"}, requireAll = false)
public static void onCheckedChangedCommand(final RadioGroup radioGroup, final BindingCommand<String> bindingCommand) {
    radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {
            RadioButton radioButton = (RadioButton) group.findViewById(checkedId);
            bindingCommand.execute(radioButton.getText().toString());
        }
    });
}
 

/**
 * 通过android:imageUrl可以在xml布局中直接为ImageView设置url地址，这样方便业务中使用第三方库加载网络图片
 *
 * @param imageView xml中ImageView实例
 * @param imgUrl    网络图片地址
 */
@BindingAdapter({"android:imageUrl"})
public static void setImageViewResource(ImageView imageView, String imgUrl) {
    Context context = imageView.getContext();
    //此处通过imgUrl字符串获取资源ID,具体使用根据业务需要
    int resId = context.getResources().getIdentifier(imgUrl, "drawable", context.getPackageName());
    imageView.setImageResource(resId);
}
 

@BindingAdapter({"itemView", "observableList"})
public static void addViews(ViewGroup viewGroup, final ItemBinding itemBinding, final ObservableList<IBindingItemViewModel> viewModelList) {
    if (viewModelList != null && !viewModelList.isEmpty()) {
        viewGroup.removeAllViews();
        for (IBindingItemViewModel viewModel : viewModelList) {
            ViewDataBinding binding = DataBindingUtil.inflate(LayoutInflater.from(Utils.getContext()),
                    itemBinding.layoutRes(), viewGroup, true);
            binding.setVariable(itemBinding.variableId(), viewModel);
            viewModel.injecDataBinding(binding);
        }
    }
}
 

/**
 * @param bindingCommand //绑定监听
 */
@SuppressWarnings("unchecked")
@BindingAdapter(value = {"onCheckedChangedCommand"}, requireAll = false)
public static void setCheckedChanged(final CheckBox checkBox, final BindingCommand<Boolean> bindingCommand) {
    checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            bindingCommand.execute(b);
        }
    });
}
 

/**
 * 回调控件本身
 *
 * @param currentView
 * @param bindingCommand
 */
@BindingAdapter(value = {"currentView"}, requireAll = false)
public static void replyCurrentView(View currentView, BindingCommand bindingCommand) {
    if (bindingCommand != null) {
        bindingCommand.execute(currentView);
    }
}
 

/**
 * view的onLongClick事件绑定
 */
@BindingAdapter(value = {"onLongClickCommand"}, requireAll = false)
public static void onLongClickCommand(View view, final BindingCommand clickCommand) {
    RxView.longClicks(view)
            .subscribe(new Consumer<Object>() {
                @Override
                public void accept(Object object) throws Exception {
                    if (clickCommand != null) {
                        clickCommand.execute();
                    }
                }
            });
}
 

/**
 * Utility method for Image url If image url is valid then it is parsed else
 * Article url provides url to website and icon finder utility is used to find icon
 *
 * @param imageView  Default view passed for displaying image
 * @param url        Url of the image
 * @param articleUrl URL to the article
 */
@BindingAdapter({"bind:url", "bind:articleUrl"})
public static void loadThumbnailImage(ImageView imageView, String url, String articleUrl) {
    Context context = imageView.getContext();
    if (url == null) {
        String iconUrl = "https://besticon-demo.herokuapp.com/icon?url=%s&size=80..120..200";
        url = String.format(iconUrl, Uri.parse(articleUrl).getAuthority());
    }
    GlideApp.with(imageView)
            .load(url)
            .apply(NewsGlideModule.roundedCornerImage(new RequestOptions(), imageView.getContext(), 4))
            .placeholder(context.getResources().getDrawable(R.color.cardBackground))
            .into(imageView);
}
 

@BindingAdapter("judgehint")
public static void setHint(EditText view, CharSequence hint) {
    switch (view.getId()) {
        case R.id.edit_options_logcat:
            String options = "[options]";
            if (!hint.equals("")) {
                options = hint.toString();
            }
            view.setHint(options);
            break;
        case R.id.edit_filter_logcat:
            String filter = "[filterspecs]";
            if (!hint.equals("")) {
                filter = hint.toString();
            }
            view.setHint(filter);
            break;
        case R.id.edit_grep_logcat:
            String grep = "[grep]";
            if (!hint.equals("")) {
                grep = hint.toString();
            }
            view.setHint(grep);
            break;
        default:
            ZLog.e("no match");
            break;
    }
}
 

@BindingAdapter(value = {"itemBinding", "items", "adapter", "itemIds", "viewHolder", "onItemBound"}, requireAll = false)
public static <T> void setAdapter(RecyclerView recyclerView, OnItemBind<T> onItemBind, List<T> items,
                                  BindingRecyclerViewAdapter<T> adapter, BindingRecyclerViewAdapter.ItemIds<? super T> itemIds,
                                  BindingRecyclerViewAdapter.ViewHolderFactory viewHolderFactory, OnItemBoundHandler<T> onItemBoundHandler) {
    ItemBinding<T> itemBinding = ((onItemBind != null) && (onItemBoundHandler != null))
            ? ItemBinding.of(new OnItemBindWrapper<>(onItemBind, onItemBoundHandler))
            : ItemBinding.of(onItemBind);
    BindingRecyclerViewAdapters.setAdapter(recyclerView, itemBinding, items, adapter, itemIds, viewHolderFactory);

}
 

/**
 * Binding "visibility" to the a boolean value.
 *
 * @param view the View to set visibility
 * @param value the boolean value to bind. True for VISIBLE and False for GONE.
 */
@BindingAdapter({"visibility"})
public static void setVisibilityByBoolean(final View view, final boolean value) {
    if (value) {
        view.setVisibility(View.VISIBLE);
    } else {
        view.setVisibility(View.GONE);
    }
}
 

/**
 * Utility method for Image url If image url is valid then it is parsed else
 * Article url provides url to website and icon finder utility is used to find icon
 * This puts a radius 0 to image
 *
 * @param imageView  Default view passed for displaying image
 * @param url        Url of the image
 * @param articleUrl URL to the article
 */
@BindingAdapter({"bind:urlToImage", "bind:articleUrl"})
public static void loadImage(ImageView imageView, String url, String articleUrl) {
    Context context = imageView.getContext();
    if (url == null) {
        String iconUrl = "https://besticon-demo.herokuapp.com/icon?url=%s&size=80..120..200";
        url = String.format(iconUrl, Uri.parse(articleUrl).getAuthority());
    }
    GlideApp.with(imageView)
            .load(url)
            .apply(NewsGlideModule.roundedCornerImage(new RequestOptions(), imageView.getContext(), 0))
            .placeholder(context.getResources().getDrawable(R.color.cardBackground))
            .into(imageView);
}
 

@BindingAdapter(value = {"android:drawableLeft"})
public static void setDrawableLeft(TextView textView, int resID) {
    Drawable leftDrawable = textView.getContext().getResources().getDrawable(resID);
    leftDrawable.setBounds(0, 0, leftDrawable.getMinimumWidth(), leftDrawable.getMinimumHeight());
    textView.setCompoundDrawables(
            leftDrawable,
            null,
            null,
            null);
}
 

/**
 * (伪)双向 databinding: 自动调用 {@link TwoWayListVM#getLoadTask()},
 *      并自动触发 {@link TwoWayListVM#setData(ObservableArrayList)}
 *      然后自动更新 RecyclerView
 *
 * @param container
 * @param vm
 * @param datas
 * @param <T>
 */
@BindingAdapter({"vm", "data"})
public static <T> void setDataTwoWay(final RecyclerView container, final ListVM<T> vm, List<T> datas){
    if(vm == null){
        return ;
    }
    setData(container, vm, datas);

    if(vm instanceof TwoWayListVM) {
        boolean isInited = container.getTag(R.id.db_inited) != null;
        if (!isInited) {
            container.setTag(R.id.db_inited, true);

            final TwoWayListVM<T> _vm = ((TwoWayListVM<T>) vm);

            loadData(container, _vm, null, null);
            // 若 parent 可下拉刷新，设置回调
            ViewParent parent = container.getParent();
            if (parent != null && parent instanceof TwoWayListVM.Refreshable) {
                final TwoWayListVM.Refreshable refreshable = (TwoWayListVM.Refreshable) parent;
                ((TwoWayListVM.Refreshable) parent).setOnRefresh(new TwoWayListVM.Refreshable.CallBack() {
                    @Override
                    public void onRefresh() {
                        loadData(container, _vm, null, refreshable);
                    }

                    @Override
                    public void onLoadMore() {
                        List<T> data = _vm.getData();
                        if (data.size() - 1 >= 0) {
                            loadData(container, _vm, data.get(data.size() - 1), refreshable);
                        }
                    }
                });
            }
        }
    }
}
 

@BindingAdapter("itemUrl")
public static void setImage(ImageView imageView, String url) {
    if (TextUtils.isEmpty(url)) {
        imageView.setVisibility(View.GONE);
        return;
    } else {
        imageView.setVisibility(View.VISIBLE);
    }

    Glide.with(imageView)
            .applyDefaultRequestOptions(PicConfig.itemOptions)
            .load(url)
            .into(imageView);
}
 

@BindingAdapter("bind:movies")
public static void setMovies(RecyclerView recyclerView, List<Movie> movies) {
    RecyclerView.Adapter adapter = recyclerView.getAdapter();

    if (adapter != null && adapter instanceof MovieAdapter) {
        ((MovieAdapter) adapter).setMovies(movies);
    } else {
        throw new IllegalStateException("RecyclerView either has no adapter set or the "
                + "adapter isn't of type MovieAdapter");
    }
}
 

@BindingAdapter("itemHeadUrl")
public static void setImage3(ImageView imageView, String url) {
    Glide.with(imageView.getContext())
            .applyDefaultRequestOptions(PicConfig.headOptions)
            .load(url)
            .into(imageView);

}
 

@BindingAdapter("blurImage")
public static void setBlurImage(ImageView imageView, String url) {
    Glide.with(imageView.getContext())
            .applyDefaultRequestOptions(PicConfig.itemOptions)
            .asBitmap()
            .load(url)
            .into(new SimpleTarget<Bitmap>() {
                @Override
                public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {
                    Blurry.with(imageView.getContext()).from(resource).into(imageView);
                }
            });

}
 

@BindingAdapter("app:spanOffset")
public static void setItemSpan(View v, int spanOffset) {
    final String itemText = ((TextView) v).getText().toString();
    final SpannableString sString = new SpannableString(itemText);

    sString.setSpan(new RelativeSizeSpan(1.65f), itemText.length() - spanOffset, itemText.length(),
        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    ((TextView) v).setText(sString);
}
 

@BindingAdapter("android:layout_marginTop")
public static void setTopMargin(View view, float topMargin) {
    ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
    layoutParams.setMargins(layoutParams.leftMargin, Math.round(topMargin),
            layoutParams.rightMargin, layoutParams.bottomMargin);
    view.setLayoutParams(layoutParams);
}