src/org/cyanogenmod/themes/provider/util/LayoutRenderUtils.java


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/*
 * Copyright (C) 2014 The CyanogenMod Project
 *
 * 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 org.cyanogenmod.themes.provider.util;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.view.View;
import android.widget.FrameLayout;

public class LayoutRenderUtils {

    public static Bitmap renderViewToBitmap(View view) {
        // Provide it with a layout params. It should necessarily be wrapping the
        // content as we not really going to have a parent for it.
        view.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT,
                FrameLayout.LayoutParams.WRAP_CONTENT));

        // Pre-measure the view so that height and width don't remain null.
        view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));

        // Assign a size and position to the view and all of its descendants
        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());

        // Create the bitmap
        Bitmap bitmap = Bitmap.createBitmap(view.getMeasuredWidth(),
                view.getMeasuredHeight(),
                Bitmap.Config.ARGB_8888);
        // Create a canvas with the specified bitmap to draw into
        Canvas c = new Canvas(bitmap);

        // Render this view to the given Canvas
        view.draw(c);
        return bitmap;
    }
}