android.widget.ImageView.setAlpha()方法的使用及代码示例

x33g5p2x  于2022-01-20 转载在 其他  
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本文整理了Java中android.widget.ImageView.setAlpha()方法的一些代码示例，展示了ImageView.setAlpha()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。ImageView.setAlpha()方法的具体详情如下：
包路径：android.widget.ImageView
类名称：ImageView
方法名：setAlpha

ImageView.setAlpha介绍

暂无

代码示例

代码示例来源：origin: stackoverflow.com

ImageView myImage = (ImageView) findViewById(R.id.myImage);
myImage.setAlpha(127); //value: [0-255]. Where 0 is fully transparent and 255 is fully opaque.

代码示例来源：origin: xmuSistone/AndroidPileLayout

/**
 * rate从零到1
 */
@Override
public void duringAnimation(float rate) {
  imageView1.setAlpha(1 - rate);
  imageView2.setAlpha(rate);
}

代码示例来源：origin: liuguangqiang/SwipeBack

@Override
public void onViewPositionChanged(float fractionAnchor, float fractionScreen) {
  ivShadow.setAlpha(1 - fractionScreen);
}

代码示例来源：origin: stackoverflow.com

ImageView image = (ImageView) findViewById(R.id.myImage);
image.setAlpha(0.3);

代码示例来源：origin: stackoverflow.com

ImageView myImageView = new ImageView(this);
myImageView.setAlpha(xxx);

代码示例来源：origin: arimorty/floatingsearchview

private void changeIcon(ImageView imageView, Drawable newIcon, boolean withAnim) {
  imageView.setImageDrawable(newIcon);
  if (withAnim) {
    ObjectAnimator fadeInVoiceInputOrClear = ObjectAnimator.ofFloat(imageView, "alpha", 0.0f, 1.0f);
    fadeInVoiceInputOrClear.start();
  } else {
    imageView.setAlpha(1.0f);
  }
}

代码示例来源：origin: arimorty/floatingsearchview

/**
 * Hides the progress bar after
 * a prior call to showProgress()
 */
public void hideProgress() {
  mSearchProgress.setVisibility(View.GONE);
  mLeftAction.setAlpha(0.0f);
  mLeftAction.setVisibility(View.VISIBLE);
  ObjectAnimator.ofFloat(mLeftAction, "alpha", 0.0f, 1.0f).start();
}

代码示例来源：origin: xinghongfei/LookLook

public static void loadImage(Context context, String url, ImageView imageView) {
    if (Config.isNight) {
      imageView.setAlpha(0.2f);
      imageView.setBackgroundColor(Color.BLACK);
    }
    Glide.with(context).load(url).centerCrop().into(imageView);
  }
}

代码示例来源：origin: arimorty/floatingsearchview

@Override
  public void onAnimationEnd(Animator animation) {
    //restore normal state
    mLeftAction.setScaleX(1.0f);
    mLeftAction.setScaleY(1.0f);
    mLeftAction.setAlpha(1.0f);
    mLeftAction.setVisibility(View.INVISIBLE);
  }
});

代码示例来源：origin: Naoki2015/CircleDemo

@Override
public void videoStopped() {
  cancelAlphaAnimate(videoFrame);
  videoPlayer.setAlpha(0);
  videoFrame.setAlpha(1.f);
  videoButton.setVisibility(View.VISIBLE);
  videoProgress.setVisibility(View.GONE);
  videoFrame.setVisibility(View.VISIBLE);
}

代码示例来源：origin: scwang90/SmartRefreshLayout

mCircleView = new CircleImageView(context,CIRCLE_BG_LIGHT);
mCircleView.setImageDrawable(mProgress);
mCircleView.setAlpha(0f);
thisGroup.addView(mCircleView);

代码示例来源：origin: arimorty/floatingsearchview

@Override
public void onBindSuggestion(View suggestionView, ImageView leftIcon,
               TextView textView, SearchSuggestion item, int itemPosition) {
  ColorSuggestion colorSuggestion = (ColorSuggestion) item;
  String textColor = mIsDarkSearchTheme ? "#ffffff" : "#000000";
  String textLight = mIsDarkSearchTheme ? "#bfbfbf" : "#787878";
  if (colorSuggestion.getIsHistory()) {
    leftIcon.setImageDrawable(ResourcesCompat.getDrawable(getResources(),
        R.drawable.ic_history_black_24dp, null));
    Util.setIconColor(leftIcon, Color.parseColor(textColor));
    leftIcon.setAlpha(.36f);
  } else {
    leftIcon.setAlpha(0.0f);
    leftIcon.setImageDrawable(null);
  }
  textView.setTextColor(Color.parseColor(textColor));
  String text = colorSuggestion.getBody()
      .replaceFirst(mSearchView.getQuery(),
          "<font color=\"" + textLight + "\">" + mSearchView.getQuery() + "</font>");
  textView.setText(Html.fromHtml(text));
}

代码示例来源：origin: arimorty/floatingsearchview

@Override
public void onBindSuggestion(View suggestionView, ImageView leftIcon,
               TextView textView, SearchSuggestion item, int itemPosition) {
  ColorSuggestion colorSuggestion = (ColorSuggestion) item;
  String textColor = mIsDarkSearchTheme ? "#ffffff" : "#000000";
  String textLight = mIsDarkSearchTheme ? "#bfbfbf" : "#787878";
  if (colorSuggestion.getIsHistory()) {
    leftIcon.setImageDrawable(ResourcesCompat.getDrawable(getResources(),
        R.drawable.ic_history_black_24dp, null));
    Util.setIconColor(leftIcon, Color.parseColor(textColor));
    leftIcon.setAlpha(.36f);
  } else {
    leftIcon.setAlpha(0.0f);
    leftIcon.setImageDrawable(null);
  }
  textView.setTextColor(Color.parseColor(textColor));
  String text = colorSuggestion.getBody()
      .replaceFirst(mSearchView.getQuery(),
          "<font color=\"" + textLight + "\">" + mSearchView.getQuery() + "</font>");
  textView.setText(Html.fromHtml(text));
}

代码示例来源：origin: ZieIony/Carbon

@Override
public void setAlpha(@FloatRange(from = 0.0, to = 1.0) float alpha) {
  super.setAlpha(alpha);
  invalidateParentIfNeeded();
  fireOnTransformationChangedListener();
}

代码示例来源：origin: arimorty/floatingsearchview

public void onTextChanged(final CharSequence s, int start, int before, int count) {
  //todo investigate why this is called twice when pressing back on the keyboard
  if (mSkipTextChangeEvent || !mIsFocused) {
    mSkipTextChangeEvent = false;
  } else {
    if (mSearchInput.getText().toString().length() != 0 &&
        mClearButton.getVisibility() == View.INVISIBLE) {
      mClearButton.setAlpha(0.0f);
      mClearButton.setVisibility(View.VISIBLE);
      ViewCompat.animate(mClearButton).alpha(1.0f).setDuration(CLEAR_BTN_FADE_ANIM_DURATION).start();
    } else if (mSearchInput.getText().toString().length() == 0) {
      mClearButton.setVisibility(View.INVISIBLE);
    }
    if (mQueryListener != null && mIsFocused && !mOldQuery.equals(mSearchInput.getText().toString())) {
      mQueryListener.onSearchTextChanged(mOldQuery, mSearchInput.getText().toString());
    }
  }
  mOldQuery = mSearchInput.getText().toString();
}

代码示例来源：origin: north2016/T-MVP

void forward(int position, float positionOffset) {
  if (isSkip) return;
  // Log.e("DEBUG-WCL", "forward-positionOffset: " + positionOffset);
  int width = mTargetImage.getWidth();
  mOutgoingImage.setTranslationX(-positionOffset * (FACTOR * width));
  mTargetImage.setTranslationX((1 - positionOffset) * (FACTOR * width));
  int color = BaseUtils.evaluate(positionOffset, mColors[position], mColors[position + 1]);
  collapsingToolbar.setContentScrimColor(color);
  collapsingToolbar.setStatusBarScrimColor(color);
  mTargetImage.setAlpha(positionOffset);
}

代码示例来源：origin: north2016/T-MVP

void backwards(int position, float positionOffset) {
  if (isSkip) return;
  // Log.e("DEBUG-WCL", "backwards-positionOffset: " + positionOffset);
  int width = mTargetImage.getWidth();
  mOutgoingImage.setTranslationX((1 - positionOffset) * (FACTOR * width));
  mTargetImage.setTranslationX(-(positionOffset) * (FACTOR * width));
  int color = BaseUtils.evaluate(1 - positionOffset, mColors[position + 1], mColors[position]);
  collapsingToolbar.setContentScrimColor(color);
  collapsingToolbar.setStatusBarScrimColor(color);
  mTargetImage.setAlpha(1 - positionOffset);
}

代码示例来源：origin: ZieIony/Carbon

@Override
  public void onAnimationUpdate(ValueAnimator valueAnimator) {
    ImageView imageView = (ImageView) animator.getTarget();
    float fraction = animator.getAnimatedFraction();
    saturationMatrix.setSaturation((Float) animator.getAnimatedValue());
    float scale = 2 - interpolator.getInterpolation(Math.min((1 - fraction) * 4 / 3, 1));
    brightnessMatrix.setScale(scale, scale, scale, 1);
    saturationMatrix.preConcat(brightnessMatrix);
    imageView.setColorFilter(new ColorMatrixColorFilter(saturationMatrix));
    imageView.setAlpha(interpolator.getInterpolation(Math.min((1 - fraction) * 2, 1)));
  }
});

代码示例来源：origin: ZieIony/Carbon

@Override
  public void onAnimationUpdate(ValueAnimator valueAnimator) {
    ImageView imageView = (ImageView) animator.getTarget();
    float fraction = animator.getAnimatedFraction();
    saturationMatrix.setSaturation((Float) animator.getAnimatedValue());
    float scale = 2 - interpolator.getInterpolation(Math.min(fraction * 4 / 3, 1));
    brightnessMatrix.setScale(scale, scale, scale, 1);
    saturationMatrix.preConcat(brightnessMatrix);
    imageView.setColorFilter(new ColorMatrixColorFilter(saturationMatrix));
    imageView.setAlpha(interpolator.getInterpolation(Math.min(fraction * 2, 1)));
  }
});

代码示例来源：origin: aa112901/remusic

@Override
public void onScrollChanged(int scrollY, boolean firstScroll, boolean dragging) {
  if (dragging) {
    int toolbarHeight = mHeaderView.getHeight() - mActionBarSize - mStatusSize - tabLayout.getHeight();
    float currentHeaderTranslationY = ViewHelper.getTranslationY(mHeaderView);
    if (firstScroll) {
      if (-toolbarHeight < currentHeaderTranslationY) {
        mBaseTranslationY = scrollY;
      }
    }
    float headerTranslationY = ScrollUtils.getFloat(-(scrollY - mBaseTranslationY), -toolbarHeight, 0);
    ViewPropertyAnimator.animate(mHeaderView).cancel();
    ViewHelper.setTranslationY(mHeaderView, headerTranslationY);
  }
  toolbar_bac.setImageResource(R.drawable.toolbar_background_black);
  float a = (float) scrollY / (ViewHelper.getScrollY(mHeaderView));
  toolbar_bac.setAlpha(a);
}

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