Example usage for android.graphics.drawable Drawable setAlpha

Introduction

In this page you can find the example usage for android.graphics.drawable Drawable setAlpha.

Prototype

public abstract void setAlpha(@IntRange(from = 0, to = 255) int alpha);

Source Link

Document

Specify an alpha value for the drawable.

Usage

From source file:com.zyk.launcher.AsyncTaskCallback.java

public void setPageBackgroundsVisible(boolean visible) {
    mPageBackgroundsVisible = visible;// www .j  a v  a  2s. co m
    int childCount = getChildCount();
    for (int i = 0; i < childCount; ++i) {
        Drawable bg = getChildAt(i).getBackground();
        if (bg != null) {
            bg.setAlpha(visible ? 255 : 0);
        }
    }
}

From source file:com.zyk.launcher.AsyncTaskCallback.java

private void setupPage(PagedViewGridLayout layout) {
    // Note: We force a measure here to get around the fact that when we do layout calculations
    // immediately after syncing, we don't have a proper width.
    int widthSpec = MeasureSpec.makeMeasureSpec(mContentWidth, MeasureSpec.AT_MOST);
    int heightSpec = MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.AT_MOST);

    Drawable bg = getContext().getResources().getDrawable(R.drawable.quantum_panel_dark);
    if (bg != null) {
        bg.setAlpha(mPageBackgroundsVisible ? 255 : 0);
        layout.setBackground(bg);/*from   w w  w .ja va2  s . c  o m*/
    }
    layout.measure(widthSpec, heightSpec);
}

From source file:com.zyk.launcher.AsyncTaskCallback.java

private void setupPage(AppsCustomizeCellLayout layout) {
    layout.setGridSize(mCellCountX, mCellCountY);

    // Note: We force a measure here to get around the fact that when we do layout calculations
    // immediately after syncing, we don't have a proper width.  That said, we already know the
    // expected page width, so we can actually optimize by hiding all the TextView-based
    // children that are expensive to measure, and let that happen naturally later.
    setVisibilityOnChildren(layout, View.GONE);
    int widthSpec = MeasureSpec.makeMeasureSpec(mContentWidth, MeasureSpec.AT_MOST);
    int heightSpec = MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.AT_MOST);
    layout.measure(widthSpec, heightSpec);

    Drawable bg = getContext().getResources().getDrawable(R.drawable.quantum_panel);
    if (bg != null) {
        bg.setAlpha(mPageBackgroundsVisible ? 255 : 0);
        //            layout.setBackground(bg);
        layout.setBackgroundColor(Color.TRANSPARENT);
    }//from  ww  w .ja v a2 s  .  c  om

    setVisibilityOnChildren(layout, View.VISIBLE);
}

From source file:com.android.leanlauncher.CellLayout.java

@Override
protected void onDraw(Canvas canvas) {
    // When we're large, we are either drawn in a "hover" state (ie when dragging an item to
    // a neighboring page) or with just a normal background (if backgroundAlpha > 0.0f)
    // When we're small, we are either drawn normally or in the "accepts drops" state (during
    // a drag). However, we also drag the mini hover background *over* one of those two
    // backgrounds
    if (mDrawBackground && mBackgroundAlpha > 0.0f) {
        Drawable bg;

        if (mUseActiveGlowBackground) {
            // In the mini case, we draw the active_glow bg *over* the active background
            bg = mActiveGlowBackground;//from  w ww  . j ava  2  s .c  o m
        } else {
            bg = mNormalBackground;
        }

        bg.setAlpha((int) (mBackgroundAlpha * mBackgroundAlphaMultiplier * 255));
        bg.setBounds(mBackgroundRect);
        bg.draw(canvas);
    }

    final Paint paint = mDragOutlinePaint;
    for (int i = 0; i < mDragOutlines.length; i++) {
        final float alpha = mDragOutlineAlphas[i];
        if (alpha > 0) {
            final Rect r = mDragOutlines[i];
            mTempRect.set(r);
            Utilities.scaleRectAboutCenter(mTempRect, getChildrenScale());
            final Bitmap b = (Bitmap) mDragOutlineAnims[i].getTag();
            paint.setAlpha((int) (alpha + .5f));
            canvas.drawBitmap(b, null, mTempRect, paint);
        }
    }
}