根据条件以编程方式更改字符串颜色

debugcn 发表于 Dev

邦妮7

是否可以使用 if 条件为 TextView 内的不同文本段设置多种颜色？

这是我的代码：

mColoredText = findViewById(R.id.questionText);
        String mColoredString = "BLACK RED GREEN YELLOW ORANGE BLUE WHITE";
        SpannableStringBuilder builder = new SpannableStringBuilder();

        if(mColoredString.contains("RED")) {
            String red = "RED";
            SpannableString redSpannable = new SpannableString(red);
            redSpannable.setSpan(new ForegroundColorSpan(Color.RED), 0, red.length(), 0);
            builder.append(redSpannable);
        }

        if(mColoredString.contains("YELLOW")) {
            String yellow = "YELLOW";
            SpannableString whiteSpannable = new SpannableString(yellow);
            whiteSpannable.setSpan(new ForegroundColorSpan(Color.YELLOW), 0, yellow.length(), 0);
            builder.append(whiteSpannable);
        }

        if(mColoredString.contains("BLUE")) {
            String blue = "BLUE";
            SpannableString blueSpannable = new SpannableString(blue);
            blueSpannable.setSpan(new ForegroundColorSpan(Color.BLUE), 0, blue.length(), 0);
            builder.append(blueSpannable);
        }

        mColoredText.setText(builder, TextView.BufferType.SPANNABLE);

但最终的结果总是打印： RED YELLOW BLUE 和它的颜色，只有三个文本。

我希望将 BLACK RED GREEN YELLOW ORANGE BLUE WHITE 写在一起，如果没有可跨越的颜色，则适用白色。

安卓团队

试试这个代码..

    textView = findViewById(R.id.tvData);
    String mColoredString = "BLACK RED GREEN YELLOW ORANGE BLUE WHITE";
    SpannableStringBuilder builder = new SpannableStringBuilder();

    String strArray[] = mColoredString.split(" ");
    for (int i = 0; i < strArray.length; i++) {
        if (strArray[i].equals("RED")) {
            SpannableString redSpannable = new SpannableString(strArray[i]);
            redSpannable.setSpan(new ForegroundColorSpan(Color.RED), 0, strArray[i].length(), 0);
            builder.append(redSpannable);
        } else if (strArray[i].equals("YELLOW")) {
            SpannableString whiteSpannable = new SpannableString(strArray[i]);
            whiteSpannable.setSpan(new ForegroundColorSpan(Color.YELLOW), 0, strArray[i].length(), 0);
            builder.append(whiteSpannable);
        } else if (strArray[i].equals("BLUE")) {
            SpannableString blueSpannable = new SpannableString(strArray[i]);
            blueSpannable.setSpan(new ForegroundColorSpan(Color.BLUE), 0, strArray[i].length(), 0);
            builder.append(blueSpannable);
        } else {
            builder.append(strArray[i]);
        }

    }
    textView.setText(builder);

}

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