SpanActivity.java 文件源码

private void initAnimSpan() {
    mShaderWidth = 64 * density * 4;
    mShader = new LinearGradient(0, 0,
            mShaderWidth, 0,
            getResources().getIntArray(R.array.rainbow),
            null,
            Shader.TileMode.REPEAT);
    matrix = new Matrix();

    mBlurMaskFilterSpan = new BlurMaskFilterSpan(25);

    mShadowSpan = new ShadowSpan(8, 8, 8, Color.WHITE);

    mForegroundAlphaColorSpan = new ForegroundAlphaColorSpan(Color.TRANSPARENT);

    mForegroundAlphaColorSpanGroup = new ForegroundAlphaColorSpanGroup(0);

    mPrinterString = "打印动画，后面的文字是为了测试打印效果...";

    mSpanUtils = new SpanUtils()
            .appendLine("彩虹动画").setFontSize(64, true).setShader(mShader)
            .appendLine("模糊动画").setFontSize(64, true).setSpans(mBlurMaskFilterSpan)
            .appendLine("阴影动画").setFontSize(64, true).setBackgroundColor(Color.BLACK).setSpans(mShadowSpan)
            .appendLine("透明动画").setFontSize(64, true).setSpans(mForegroundAlphaColorSpan);
    for (int i = 0, len = mPrinterString.length(); i < len; ++i) {
        ForegroundAlphaColorSpan span = new ForegroundAlphaColorSpan(Color.TRANSPARENT);
        mSpanUtils.append(mPrinterString.substring(i, i + 1)).setSpans(span);
        mForegroundAlphaColorSpanGroup.addSpan(span);
    }
    animSsb = mSpanUtils.create();
}