com.achillesrasquinha.biblegenerator.ImageGenerator.java Source code

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Here is the source code for com.achillesrasquinha.biblegenerator.ImageGenerator.java

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// Copyright 2015 Achilles Rasquinha

// 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.achillesrasquinha.biblegenerator;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.Typeface;
import android.support.v4.content.ContextCompat;
import android.text.Layout;
import android.text.StaticLayout;
import android.text.TextPaint;
import android.util.DisplayMetrics;
import android.util.TypedValue;

public class ImageGenerator {
    private Context mContext;

    private Point mImageSize;
    private int mX;
    private int mYTitle;
    private int mYSubtitle;
    private float mSizeTitle;
    private float mSizeSubtitle;
    private float mLineSpacing;

    private TextPaint mTextPaint;

    private int mColor1;
    private int mColor2;
    private int mColor3;

    public ImageGenerator(Context context) {
        mContext = context;

        DisplayMetrics m = mContext.getResources().getDisplayMetrics();

        mImageSize = new Point();
        mImageSize.x = m.widthPixels;
        mImageSize.y = mImageSize.x;

        mX = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 16, m));
        mSizeTitle = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 24, m);
        mYTitle = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 24, m) + mSizeTitle);
        mSizeSubtitle = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 14, m);
        mYSubtitle = Math
                .round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 12, m) + mYTitle + mSizeSubtitle);
        mLineSpacing = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, m);

        mTextPaint = new TextPaint();
        mTextPaint.setAntiAlias(true);
        mTextPaint.setTextAlign(TextPaint.Align.LEFT);
        mTextPaint.setTypeface(Typeface.createFromAsset(mContext.getAssets(), "fonts/Roboto/Roboto-Medium.ttf"));

        mColor1 = ContextCompat.getColor(mContext, R.color.primary_text_default_material_light);
        mColor2 = ContextCompat.getColor(mContext, R.color.primary_text_disabled_material_light);
        mColor3 = ContextCompat.getColor(mContext, R.color.secondary_text_default_material_light);
    }

    public Bitmap getBitmap(String title, String subtitle, String text) {
        Bitmap bitmap = Bitmap.createBitmap(mImageSize.x, mImageSize.y, Bitmap.Config.ARGB_8888);
        //convert bitmap to card view background color
        bitmap.eraseColor(ContextCompat.getColor(mContext, R.color.cardview_light_background));

        Canvas canvas = new Canvas(bitmap);

        //title
        mTextPaint.setTextSize(mSizeTitle);
        mTextPaint.setColor(mColor1);
        canvas.drawText(title, mX, mYTitle, mTextPaint);

        //subtitle
        mTextPaint.setTextSize(mSizeSubtitle);
        mTextPaint.setColor(mColor2);
        canvas.drawText(subtitle, mX, mYSubtitle, mTextPaint);

        //since text needs to be wrapped, using a StaticLayout
        mTextPaint.setColor(mColor3);
        //text size same as subtitle size
        StaticLayout layout = new StaticLayout(text, mTextPaint, mImageSize.x - 2 * mX,
                Layout.Alignment.ALIGN_NORMAL, 1.0f, mLineSpacing, false);
        //16dp padding as per material design guidelines
        canvas.translate(mX, mYSubtitle + mX);
        layout.draw(canvas);

        return bitmap;
    }
}