本文整理了Java中android.graphics.drawable.Drawable.getAlpha()方法的一些代码示例，展示了Drawable.getAlpha()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。Drawable.getAlpha()方法的具体详情如下：
包路径：android.graphics.drawable.Drawable
类名称：Drawable
方法名：getAlpha

Drawable.getAlpha介绍

暂无

代码示例

代码示例来源：origin: facebook/litho

public static float getAlpha(Drawable drawable) {
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
  final int scaledValue = drawable.getAlpha();
  return scaledValue / 255f;
 } else {
  // TODO(T28432326): using reflection check if drawable has getAlpha(), if so, invoke it
  return 1;
 }
}

代码示例来源：origin: bumptech/glide

@RequiresApi(Build.VERSION_CODES.KITKAT)
@Override
public int getAlpha() {
 return wrapped.getAlpha();
}

代码示例来源：origin: square/assertj-android

@TargetApi(KITKAT)
public S hasAlpha(int alpha) {
 isNotNull();
 int actualAlpha = actual.getAlpha();
 assertThat(actualAlpha) //
   .overridingErrorMessage("Expected alpha <%s> but was <%s>.", alpha, actualAlpha) //
   .isEqualTo(alpha);
 return myself;
}

代码示例来源：origin: ZieIony/Carbon

@Override
@TargetApi(Build.VERSION_CODES.KITKAT)
public int getAlpha() {
  final Drawable dr = getFirstNonNullDrawable();
  if (dr != null) {
    return dr.getAlpha();
  } else {
    return super.getAlpha();
  }
}

代码示例来源：origin: albert-lii/ImageViewer

public int getBackgroundAlpha() {
  if (mBackground != null) {
    return mBackground.getAlpha();
  } else {
    return NO_BACKGROUND_ALPHA;
  }
}

代码示例来源：origin: fookwood/Launcher3

public int getAlpha() {
  return mImage.getAlpha();
}

代码示例来源：origin: AlexMofer/ProjectX

@TargetApi(Build.VERSION_CODES.KITKAT)
@Override
public int getAlpha() {
  if (mDrawable == null)
    return super.getAlpha();
  return mDrawable.getAlpha();
}

代码示例来源：origin: com.albedinsky.android/ui-graphics-base

/**
 */
@Override
@SuppressLint("NewApi")
public int getAlpha() {
  return Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT ? mDrawable.getAlpha() : 0;
}

代码示例来源：origin: com.albedinsky.android/ui-graphics

/**
 */
@Override
@SuppressLint("NewApi")
public int getAlpha() {
  return Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT ? mDrawable.getAlpha() : 0;
}

代码示例来源：origin: MCMrARM/revolution-irc

@TargetApi(Build.VERSION_CODES.KITKAT)
@Override
public int getAlpha() {
  return mDrawable.getAlpha();
}

代码示例来源：origin: albert-lii/ImageViewer

@Override
public void changeBackgroundAlpha(int alpha) {
  if (canChangeBgAlpha
      && mBackground != null
      && mBackground.getAlpha() != alpha) {
    mBackground.setAlpha(alpha);
  }
}

代码示例来源：origin: mozilla-tw/Rocket

@TargetApi(Build.VERSION_CODES.KITKAT)
@Override
public int getAlpha() {
 return wrapped.getAlpha();
}

代码示例来源：origin: com.albedinsky.android/ui

/**
 */
@Override
@SuppressLint("NewApi")
public int getAlpha() {
  return Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT ? mDrawable.getAlpha() : 0;
}

代码示例来源：origin: kollerlukas/Camera-Roll-Android-App

public static void fadeDrawableAlpha(final Drawable d, int endAlpha) {
    ValueAnimator animator = getDefaultValueAnimator(d.getAlpha(), endAlpha);
    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
      @Override
      public void onAnimationUpdate(ValueAnimator valueAnimator) {
        d.setAlpha((Integer) valueAnimator.getAnimatedValue());
      }
    });
    animator.start();
  }
}

代码示例来源：origin: AlexMofer/ProjectX

@TargetApi(Build.VERSION_CODES.KITKAT)
@Override
public int getAlpha() {
  if (mDrawable == null)
    return super.getAlpha();
  return mDrawable.getAlpha();
}

代码示例来源：origin: com.albedinsky.android/dialogs-collection

/**
 * Draws the given <var>shadowDrawable</var> on the given <var>canvas</var> if the drawable is not
 * {@code null}, is visible and its alpha is grater than {@code 0}.
 *
 * @param canvas         The canvas where to draw the shadow.
 * @param shadowDrawable The drawable that represents the shadow to be drawn.
 */
@TargetApi(Build.VERSION_CODES.KITKAT)
private void drawShadow(Canvas canvas, Drawable shadowDrawable) {
  if (shadowDrawable != null && shadowDrawable.isVisible()) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT || shadowDrawable.getAlpha() > 0) {
      shadowDrawable.draw(canvas);
    }
  }
}

代码示例来源：origin: com.albedinsky.android/dialogs-collection-base

/**
 * Draws the given <var>shadowDrawable</var> on the given <var>canvas</var> if the drawable is not
 * {@code null}, is visible and its alpha is grater than {@code 0}.
 *
 * @param canvas         The canvas where to draw the shadow.
 * @param shadowDrawable The drawable that represents the shadow to be drawn.
 */
@TargetApi(Build.VERSION_CODES.KITKAT)
private void drawShadow(Canvas canvas, Drawable shadowDrawable) {
  if (shadowDrawable != null && shadowDrawable.isVisible()) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT || shadowDrawable.getAlpha() > 0) {
      shadowDrawable.draw(canvas);
    }
  }
}

代码示例来源：origin: com.albedinsky.android.support/support-dialogs-collection-base

/**
 * Draws the given <var>shadowDrawable</var> on the given <var>canvas</var> if the drawable is not
 * {@code null}, is visible and its alpha is grater than {@code 0}.
 *
 * @param canvas         The canvas where to draw the shadow.
 * @param shadowDrawable The drawable that represents the shadow to be drawn.
 */
@TargetApi(Build.VERSION_CODES.KITKAT)
private void drawShadow(Canvas canvas, Drawable shadowDrawable) {
  if (shadowDrawable != null && shadowDrawable.isVisible()) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT || shadowDrawable.getAlpha() > 0) {
      shadowDrawable.draw(canvas);
    }
  }
}

代码示例来源：origin: com.albedinsky.android.support/support-dialogs

/**
 * Draws the given <var>shadowDrawable</var> on the given <var>canvas</var> if the drawable is not
 * {@code null}, is visible and its alpha is grater than {@code 0}.
 *
 * @param canvas         The canvas where to draw the shadow.
 * @param shadowDrawable The drawable that represents the shadow to be drawn.
 */
@TargetApi(Build.VERSION_CODES.KITKAT)
private void drawShadow(Canvas canvas, Drawable shadowDrawable) {
  if (shadowDrawable != null && shadowDrawable.isVisible()) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT || shadowDrawable.getAlpha() > 0) {
      shadowDrawable.draw(canvas);
    }
  }
}

代码示例来源：origin: com.squareup.assertj/assertj-android

@TargetApi(KITKAT)
public S hasAlpha(int alpha) {
 isNotNull();
 int actualAlpha = actual.getAlpha();
 assertThat(actualAlpha) //
   .overridingErrorMessage("Expected alpha <%s> but was <%s>.", alpha, actualAlpha) //
   .isEqualTo(alpha);
 return myself;
}