Android Open Source - android-styled-dialogs Base Dialog Fragment

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Apache License
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Java Source Code

/*
 * Copyright 2013 Inmite s.r.o. (www.inmite.eu).
 */* ww  w  .  ja va 2  s . com*/
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.avast.android.dialogs.core;

import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Typeface;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.*;

import com.avast.android.dialogs.R;
import com.avast.android.dialogs.util.TypefaceHelper;

/**
 * Base dialog fragment for all your dialogs, stylable and same design on Android 2.2+.
 *
 * @author David Vvra (david@inmite.eu)
 */
public abstract class BaseDialogFragment extends DialogFragment implements DialogInterface.OnShowListener {

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Dialog dialog = new Dialog(getActivity(), R.style.SDL_Dialog);
        Bundle args = getArguments();
        if (args != null) {
            dialog.setCanceledOnTouchOutside(
                args.getBoolean(BaseDialogBuilder.ARG_CANCELABLE_ON_TOUCH_OUTSIDE));
        }
        dialog.setOnShowListener(this);
        return dialog;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        Builder builder = new Builder(getActivity(), inflater, container);
        return build(builder).create();
    }

    protected abstract Builder build(Builder initialBuilder);

    @Override
    public void onDestroyView() {
        // bug in the compatibility library
        if (getDialog() != null && getRetainInstance()) {
            getDialog().setDismissMessage(null);
        }
        super.onDestroyView();
    }

    public void showAllowingStateLoss(FragmentManager manager, String tag) {
        FragmentTransaction ft = manager.beginTransaction();
        ft.add(this, tag);
        ft.commitAllowingStateLoss();
    }

    @Override
    public void onShow(DialogInterface dialog) {
        if (getView() != null) {
            ScrollView vScrollView = (ScrollView)getView().findViewById(R.id.sdl_scrollview);
            boolean scrollable = isScrollable(vScrollView);
            modifyButtonsBasedOnScrollableContent(scrollable);
        }
    }

    /**
     * Button divider should be shown only if the content is scrollable.
     */
    private void modifyButtonsBasedOnScrollableContent(boolean scrollable) {
        if (getView() == null) {
            return;
        }
        View vButtonDivider = getView().findViewById(R.id.sdl_button_divider);
        View vButtonsBottomSpace = getView().findViewById(R.id.sdl_buttons_bottom_space);
        View vDefaultButtons = getView().findViewById(R.id.sdl_buttons_default);
        View vStackedButtons = getView().findViewById(R.id.sdl_buttons_stacked);
        if (vDefaultButtons.getVisibility() == View.GONE && vStackedButtons.getVisibility() == View.GONE) {
            // no buttons
            vButtonDivider.setVisibility(View.GONE);
            vButtonsBottomSpace.setVisibility(View.GONE);
        } else if (scrollable) {
            vButtonDivider.setVisibility(View.VISIBLE);
            vButtonsBottomSpace.setVisibility(View.GONE);
        } else {
            vButtonDivider.setVisibility(View.GONE);
            vButtonsBottomSpace.setVisibility(View.VISIBLE);
        }
    }

    boolean isScrollable(ScrollView scrollView) {
        if (scrollView.getChildCount() == 0) {
            return false;
        }
        final int childHeight = scrollView.getChildAt(0).getMeasuredHeight();
        return scrollView.getMeasuredHeight() < childHeight;
    }

    /**
     * Custom dialog builder
     */
    protected static class Builder {

        private final Context mContext;

        private final ViewGroup mContainer;

        private final LayoutInflater mInflater;

        private CharSequence mTitle = null;

        private CharSequence mPositiveButtonText;

        private View.OnClickListener mPositiveButtonListener;

        private CharSequence mNegativeButtonText;

        private View.OnClickListener mNegativeButtonListener;

        private CharSequence mNeutralButtonText;

        private View.OnClickListener mNeutralButtonListener;

        private CharSequence mMessage;

        private View mCustomView;

        private ListAdapter mListAdapter;

        private int mListCheckedItemIdx;

        private AdapterView.OnItemClickListener mOnItemClickListener;



        public Builder(Context context, LayoutInflater inflater, ViewGroup container) {
            this.mContext = context;
            this.mContainer = container;
            this.mInflater = inflater;
        }

        public LayoutInflater getLayoutInflater() {
            return mInflater;
        }

        public Builder setTitle(int titleId) {
            this.mTitle = mContext.getText(titleId);
            return this;
        }

        public Builder setTitle(CharSequence title) {
            this.mTitle = title;
            return this;
        }

        public Builder setPositiveButton(int textId, final View.OnClickListener listener) {
            mPositiveButtonText = mContext.getText(textId);
            mPositiveButtonListener = listener;
            return this;
        }

        public Builder setPositiveButton(CharSequence text, final View.OnClickListener listener) {
            mPositiveButtonText = text;
            mPositiveButtonListener = listener;
            return this;
        }

        public Builder setNegativeButton(int textId, final View.OnClickListener listener) {
            mNegativeButtonText = mContext.getText(textId);
            mNegativeButtonListener = listener;
            return this;
        }

        public Builder setNegativeButton(CharSequence text, final View.OnClickListener listener) {
            mNegativeButtonText = text;
            mNegativeButtonListener = listener;
            return this;
        }

        public Builder setNeutralButton(int textId, final View.OnClickListener listener) {
            mNeutralButtonText = mContext.getText(textId);
            mNeutralButtonListener = listener;
            return this;
        }

        public Builder setNeutralButton(CharSequence text, final View.OnClickListener listener) {
            mNeutralButtonText = text;
            mNeutralButtonListener = listener;
            return this;
        }

        public Builder setMessage(int messageId) {
            mMessage = mContext.getText(messageId);
            return this;
        }

        public Builder setMessage(CharSequence message) {
            mMessage = message;
            return this;
        }

        /**
         * Set list
         *
         * @param checkedItemIdx Item check by default, -1 if no item should be checked
         */
        public Builder setItems(ListAdapter listAdapter, int checkedItemIdx,
                                final AdapterView.OnItemClickListener listener) {
            mListAdapter = listAdapter;
            mOnItemClickListener = listener;
            mListCheckedItemIdx = checkedItemIdx;
            return this;
        }

        public Builder setView(View view) {
            mCustomView = view;
            return this;
        }

        public View create() {

            LinearLayout content = (LinearLayout)mInflater.inflate(R.layout.sdl_dialog, mContainer, false);

            TextView vTitle = (TextView)content.findViewById(R.id.sdl_title);
            TextView vMessage = (TextView)content.findViewById(R.id.sdl_message);
            FrameLayout vCustomView = (FrameLayout)content.findViewById(R.id.sdl_custom);
            Button vPositiveButton = (Button)content.findViewById(R.id.sdl_button_positive);
            Button vNegativeButton = (Button)content.findViewById(R.id.sdl_button_negative);
            Button vNeutralButton = (Button)content.findViewById(R.id.sdl_button_neutral);
            Button vPositiveButtonStacked = (Button)content.findViewById(R.id.sdl_button_positive_stacked);
            Button vNegativeButtonStacked = (Button)content.findViewById(R.id.sdl_button_negative_stacked);
            Button vNeutralButtonStacked = (Button)content.findViewById(R.id.sdl_button_neutral_stacked);
            View vButtonsDefault = content.findViewById(R.id.sdl_buttons_default);
            View vButtonsStacked = content.findViewById(R.id.sdl_buttons_stacked);
            ListView vList = (ListView)content.findViewById(R.id.sdl_list);

            Typeface regularFont = TypefaceHelper.get(mContext, "Roboto-Regular");
            Typeface mediumFont = TypefaceHelper.get(mContext, "Roboto-Medium");

            set(vTitle, mTitle, mediumFont);
            set(vMessage, mMessage, regularFont);
            setPaddingOfTitleAndMessage(vTitle, vMessage);

            if (mCustomView != null) {
                vCustomView.addView(mCustomView);
            }
            if (mListAdapter != null) {
                vList.setAdapter(mListAdapter);
                vList.setOnItemClickListener(mOnItemClickListener);
                if (mListCheckedItemIdx != -1) {
                    vList.setSelection(mListCheckedItemIdx);
                }
            }

            if (shouldStackButtons()) {
                set(vPositiveButtonStacked, mPositiveButtonText, mediumFont, mPositiveButtonListener);
                set(vNegativeButtonStacked, mNegativeButtonText, mediumFont, mNegativeButtonListener);
                set(vNeutralButtonStacked, mNeutralButtonText, mediumFont, mNeutralButtonListener);
                vButtonsDefault.setVisibility(View.GONE);
                vButtonsStacked.setVisibility(View.VISIBLE);
            } else {
                set(vPositiveButton, mPositiveButtonText, mediumFont, mPositiveButtonListener);
                set(vNegativeButton, mNegativeButtonText, mediumFont, mNegativeButtonListener);
                set(vNeutralButton, mNeutralButtonText, mediumFont, mNeutralButtonListener);
                vButtonsDefault.setVisibility(View.VISIBLE);
                vButtonsStacked.setVisibility(View.GONE);
            }
            if (TextUtils.isEmpty(mPositiveButtonText) && TextUtils.isEmpty(mNegativeButtonText) && TextUtils.isEmpty
                (mNeutralButtonText)) {
                vButtonsDefault.setVisibility(View.GONE);
            }

            return content;
        }

        /**
         * Padding is different if there is only title, only message or both.
         */
        private void setPaddingOfTitleAndMessage(TextView vTitle, TextView vMessage) {
            int grid6 = mContext.getResources().getDimensionPixelSize(R.dimen.grid_6);
            int grid4 = mContext.getResources().getDimensionPixelSize(R.dimen.grid_4);
            if (!TextUtils.isEmpty(mTitle) && !TextUtils.isEmpty(mMessage)) {
                vTitle.setPadding(grid6, grid6, grid6, grid4);
                vMessage.setPadding(grid6, 0, grid6, grid4);
            } else if (TextUtils.isEmpty(mTitle)) {
                vMessage.setPadding(grid6, grid4, grid6, grid4);
            } else if (TextUtils.isEmpty(mMessage)) {
                vTitle.setPadding(grid6, grid6, grid6, grid4);
            }
        }

        private boolean shouldStackButtons() {
            return shouldStackButton(mPositiveButtonText) || shouldStackButton(mNegativeButtonText)
                || shouldStackButton(mNeutralButtonText);
        }

        private boolean shouldStackButton(CharSequence text) {
            final int MAX_BUTTON_CHARS = 12; // based on observation, could be done better with measuring widths
            return text != null && text.length() > MAX_BUTTON_CHARS;
        }

        private void set(Button button, CharSequence text, Typeface font, View.OnClickListener listener) {
            set(button, text, font);
            if (listener != null) {
                button.setOnClickListener(listener);
            }
        }

        private void set(TextView textView, CharSequence text, Typeface font) {
            if (text != null) {
                textView.setText(text);
                textView.setTypeface(font);
            } else {
                textView.setVisibility(View.GONE);
            }
        }
    }
}
Java Source Code List
