Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2016 Peng fei Pan <sky@xiaopan.me>
 *
 * 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.
 */

import android.graphics.Matrix;

public class Main {
    private static final float[] MATRIX_VALUES = new float[9];

    @SuppressWarnings("unused")
    public static int getMatrixRotateDegrees(Matrix matrix) {
        synchronized (MATRIX_VALUES) {
            matrix.getValues(MATRIX_VALUES);
            final float skewX = MATRIX_VALUES[Matrix.MSKEW_X];
            final float scaleX = MATRIX_VALUES[Matrix.MSCALE_X];
            //noinspection SuspiciousNameCombination
            final int degrees = (int) Math.round(Math.atan2(skewX, scaleX) * (180 / Math.PI));
            if (degrees < 0) {
                return Math.abs(degrees);
            } else if (degrees > 0) {
                return 360 - degrees;
            } else {
                return 0;
            }
        }
    }
}