android.graphics.Matrix.preRotate()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中android.graphics.Matrix.preRotate()方法的一些代码示例，展示了Matrix.preRotate()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Matrix.preRotate()方法的具体详情如下：
包路径：android.graphics.Matrix
类名称：Matrix
方法名：preRotate

Matrix.preRotate介绍

暂无

代码示例

代码示例来源：origin: steelkiwi/cropiwa

private static Bitmap ensureCorrectRotation(Context context, Uri uri, Bitmap bitmap) {
  int degrees = exifToDegrees(extractExifOrientation(context, uri));
  if (degrees != 0) {
    Matrix matrix = new Matrix();
    matrix.preRotate(degrees);
    return transformBitmap(bitmap, matrix);
  }
  return bitmap;
}

代码示例来源：origin: square/picasso

int exifTranslation = getExifTranslation(exifOrientation);
if (exifRotation != 0) {
 matrix.preRotate(exifRotation);
 if (exifRotation == 90 || exifRotation == 270) {

代码示例来源：origin: airbnb/lottie-android

/**
 * TODO: see if we can use this for the main {@link #getMatrix()} method.
 */
public Matrix getMatrixForRepeater(float amount) {
 if (isIdentity) {
  return matrix;
 }
 PointF position = this.position.getValue();
 PointF anchorPoint = this.anchorPoint.getValue();
 ScaleXY scale = this.scale.getValue();
 float rotation = this.rotation.getValue();
 matrix.reset();
 matrix.preTranslate(position.x * amount, position.y * amount);
 matrix.preScale(
   (float) Math.pow(scale.getScaleX(), amount),
    (float) Math.pow(scale.getScaleY(), amount));
 matrix.preRotate(rotation * amount, anchorPoint.x, anchorPoint.y);
 return matrix;
}

代码示例来源：origin: wangdan/AisenWeiBo

@Override
protected void onSizeChanged(int width, int height, int oldw, int oldh) {
  int centerX = width / 2;
  int centerY = height / 2;
  innerPadding = (int) (paramInnerPadding * width / 100);
  outerPadding = (int) (paramOuterPadding * width / 100);
  arrowPointerSize = (int) (paramArrowPointerSize * width / 100);
  valueSliderWidth = (int) (paramValueSliderWidth * width / 100);
  outerWheelRadius = width / 2 - outerPadding - arrowPointerSize;
  innerWheelRadius = outerWheelRadius - valueSliderWidth;
  colorWheelRadius = innerWheelRadius - innerPadding;
  outerWheelRect.set(centerX - outerWheelRadius, centerY - outerWheelRadius, centerX + outerWheelRadius, centerY + outerWheelRadius);
  innerWheelRect.set(centerX - innerWheelRadius, centerY - innerWheelRadius, centerX + innerWheelRadius, centerY + innerWheelRadius);
  colorWheelBitmap = createColorWheelBitmap(colorWheelRadius * 2, colorWheelRadius * 2);
  gradientRotationMatrix = new Matrix();
  gradientRotationMatrix.preRotate(270, width / 2, height / 2);
  colorViewPath.arcTo(outerWheelRect, 270, -180);
  colorViewPath.arcTo(innerWheelRect, 90, 180);
  valueSliderPath.arcTo(outerWheelRect, 270, 180);
  valueSliderPath.arcTo(innerWheelRect, 90, -180);
}

代码示例来源：origin: siyamed/android-shape-imageview

matrix.preRotate(angle);
matrix.preTranslate(-cx, -cy);

代码示例来源：origin: robolectric/robolectric

@Test
public void testPreRotate() {
 final Matrix matrix = new Matrix();
 matrix.preRotate(90.0f);
 assertPointsEqual(mapPoint(matrix, 0.0f, 1.0f), new PointF(-1.0f, 0.0f));
 matrix.preRotate(90.0f);
 assertPointsEqual(mapPoint(matrix, 0.0f, 1.0f), new PointF(0.0f, -1.0f));
 matrix.preRotate(90.0f);
 assertPointsEqual(mapPoint(matrix, 0.0f, 1.0f), new PointF(1.0f, 0.0f));
 matrix.preRotate(90.0f);
 assertPointsEqual(mapPoint(matrix, 0.0f, 1.0f), new PointF(0.0f, 1.0f));
 matrix.setTranslate(1.0f, 2.0f);
 matrix.preRotate(45.0f, 0.0f, 1.0f);
 assertPointsEqual(mapPoint(matrix, 0.0f, 1.0f), new PointF(1.0f, 3.0f));
}

代码示例来源：origin: Yalantis/uCrop

matrix.preRotate(exifDegrees);

代码示例来源：origin: robolectric/robolectric

@Test
public void preOperationsAreStacked() {
 Matrix m = new Matrix();
 m.preRotate(4, 8, 15);
 m.preTranslate(16, 23);
 m.preSkew(42, 108);
 assertThat(shadowOf(m).getPreOperations()).containsExactly(
   "skew 42.0 108.0",
   "translate 16.0 23.0",
   "rotate 4.0 8.0 15.0"
 );
}

代码示例来源：origin: airbnb/lottie-android

public Matrix getMatrix() {
 if (isIdentity) {
  return matrix;
 }
 matrix.reset();
 PointF position = this.position.getValue();
 if (position.x != 0 || position.y != 0) {
  matrix.preTranslate(position.x, position.y);
 }
 float rotation = ((FloatKeyframeAnimation) this.rotation).getFloatValue();
 if (rotation != 0f) {
  matrix.preRotate(rotation);
 }
 ScaleXY scaleTransform = this.scale.getValue();
 if (scaleTransform.getScaleX() != 1f || scaleTransform.getScaleY() != 1f) {
  matrix.preScale(scaleTransform.getScaleX(), scaleTransform.getScaleY());
 }
 PointF anchorPoint = this.anchorPoint.getValue();
 if (anchorPoint.x != 0 || anchorPoint.y != 0) {
  matrix.preTranslate(-anchorPoint.x, -anchorPoint.y);
 }
 return matrix;
}

代码示例来源：origin: bmarrdev/android-DecoView-charting

gradient = new SweepGradient(mBounds.centerX(), mBounds.centerY(), colors, positions);
  Matrix gradientRotationMatrix = new Matrix();
  gradientRotationMatrix.preRotate(mAngleStart - ((360f - mAngleSweep) / 2), mBounds.centerX(), mBounds.centerY());
  gradient.setLocalMatrix(gradientRotationMatrix);
} else {

代码示例来源：origin: mapsforge/mapsforge

@Override
public void rotate(float theta) {
  this.matrix.preRotate((float) Math.toDegrees(theta));
}

代码示例来源：origin: mapsforge/mapsforge

@Override
public void rotate(float theta, float pivotX, float pivotY) {
  this.matrix.preRotate((float) Math.toDegrees(theta), pivotX, pivotY);
}

代码示例来源：origin: simplezhli/Tesseract-OCR-Scanner

public static Bitmap preRotateBitmap(Bitmap source, float angle) {
  Matrix matrix = new Matrix();
  matrix.preRotate(angle);
  return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, false);
}

代码示例来源：origin: Lauzy/TicktockMusic

public void stop() {
//        if (!isPlaying) {
//            return;
//        }
//        isPlaying = false;
//        mRotation = 0;
    if (mShaderMatrix != null && mBitmapShader != null) {
      mShaderMatrix.preRotate(-mRotation, mBitmapWidth / 2, mBitmapHeight / 2);
      mBitmapShader.setLocalMatrix(mShaderMatrix);
    }
    mHandler.removeCallbacks(mRotationRunnable);
    isPlaying = false;
  }

代码示例来源：origin: Jamlh/Sample

protected void onDraw(Canvas canvas) {
  canvas.drawColor(Color.BLACK);
  _mPaint.setColor(Color.WHITE);
  _mPaint.setTextSize(30);
  _mPaint.setFlags(Paint.FAKE_BOLD_TEXT_FLAG);
  canvas.drawText(_message, 75, 50, _mPaint);
  // 实现图像旋转
  Matrix mat = new Matrix();
  mat.reset();
  mat.setTranslate(15, 100);
  mat.preRotate(-_decDegree, 145, 145);
  // 绘制图像
  canvas.drawBitmap(_compass, mat, _mPaint);
  canvas.drawBitmap(_arrow, 152, 73, null);
}

代码示例来源：origin: marianmoldovan/panoramagl

@Override
public PLIImage rotate(float degrees, float px, float py)
{
  Matrix matrix = new Matrix();
  matrix.preRotate(degrees, px, py);
  Bitmap image = Bitmap.createBitmap(mBitmap, 0, 0, mWidth, mHeight, matrix, true);
  this.deleteImage();
  this.createWithBitmap(image, false);
  return this;
}

代码示例来源：origin: marianmoldovan/panoramagl

/**rotate methods*/

@Override
public PLIImage rotate(int angle)
{
  if((angle % 90) != 0)
    return this;
  Matrix matrix = new Matrix();
  matrix.preRotate(angle);
  Bitmap image = Bitmap.createBitmap(mBitmap, 0, 0, mWidth, mHeight, matrix, true);
  this.deleteImage();
  this.createWithBitmap(image, false);
  return this;
}

代码示例来源：origin: xia-weiyang/MainScreenShow

public void snowRotate() {
  if (System.currentTimeMillis() - rotateTime > 10) {
    degree += 1;
    matrix.reset();
    move(this.moveType);
    matrix.setTranslate((float) x, (float) y);
    matrix.preRotate(degree, cw / 2, ch / 2);
    snowScaleChange();
    rotateTime = System.currentTimeMillis();
  }
}
/*

代码示例来源：origin: WenWangAndroid/ChartManager

private void initShader() {
    updateOval();
    if (startColor != 0 && endColor != 0) {
//            LinearGradient shader = new LinearGradient(rectF2.left, rectF2.top, rectF2.right, rectF2.bottom,
//                    endColor, startColor, Shader.TileMode.CLAMP);
      SweepGradient shader = new SweepGradient(0, 0, new int[]{startColor, endColor}, null);
      float rotate = 90f;
      Matrix gradientMatrix = new Matrix();
      gradientMatrix.preRotate(rotate, 0, 0);
      shader.setLocalMatrix(gradientMatrix);
      paintProgress.setShader(shader);
    }
  }

代码示例来源：origin: 1993hzw/Doodle

private void adjustMosaic() {
  if (getPen() == DoodlePen.MOSAIC
      && getColor() instanceof DoodleColor) {
    DoodleColor doodleColor = ((DoodleColor) getColor());
    Matrix matrix = doodleColor.getMatrix();
    matrix.reset();
    matrix.preScale(1 / getScale(), 1 / getScale(), getPivotX(), getPivotY()); // restore scale
    matrix.preTranslate(-getLocation().x * getScale(), -getLocation().y * getScale());
    matrix.preRotate(-getItemRotate(), getPivotX(), getPivotY());
    matrix.preScale(doodleColor.getLevel(), doodleColor.getLevel());
    doodleColor.setMatrix(matrix);
    refresh();
  }
}

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