LineBreaker 類別

定義

[Android.Runtime.Register("android/graphics/text/LineBreaker", ApiSince=29, DoNotGenerateAcw=true)]
public class LineBreaker : Java.Lang.Object

[<Android.Runtime.Register("android/graphics/text/LineBreaker", ApiSince=29, DoNotGenerateAcw=true)>]
type LineBreaker = class
    inherit Object

繼承

Object

Object

LineBreaker

屬性

RegisterAttribute

備註

提供 em> 單<一/em> 段落的<自動斷行。

<code>
            Paint paint = new Paint();
            Paint bigPaint = new Paint();
            bigPaint.setTextSize(paint.getTextSize() * 2.0);
            String text = "Hello, Android.";

            // Prepare the measured text
            MeasuredText mt = new MeasuredText.Builder(text.toCharArray())
                .appendStyleRun(paint, 7, false)  // Use paint for "Hello, "
                .appednStyleRun(bigPaint, 8, false)  // Use bigPaint for "Hello, "
                .build();

            LineBreaker lb = new LineBreaker.Builder()
                // Use simple line breaker
                .setBreakStrategy(LineBreaker.BREAK_STRATEGY_SIMPLE)
                // Do not add hyphenation.
                .setHyphenationFrequency(LineBreaker.HYPHENATION_FREQUENCY_NONE)
                // Build the LineBreaker
                .build();

            ParagraphConstraints c = new ParagraphConstraints();
            c.setWidth(240);  // Set the line wieth as 1024px

            // Do the line breaking
            Result r = lb.computeLineBreaks(mt, c, 0);

            // Compute the total height of the text.
            float totalHeight = 0;
            for (int i = 0; i < r.getLineCount(); ++i) {  // iterate over the lines
               totalHeight += r.getLineDescent(i) - r.getLineAscent(i);
            }

            // Draw text to the canvas
            Bitmap bmp = Bitmap.createBitmap(240, totalHeight, Bitmap.Config.ARGB_8888);
            Canvas c = new Canvas(bmp);
            float yOffset = 0f;
            int prevOffset = 0;
            for (int i = 0; i < r.getLineCount(); ++i) {  // iterate over the lines
                int nextOffset = r.getLineBreakOffset(i);
                c.drawText(text, prevOffset, nextOffset, 0f, yOffset, paint);

                prevOffset = nextOffset;
                yOffset += r.getLineDescent(i) - r.getLineAscent(i);
            }
</code>

</p>

的 android.graphics.text.LineBreakerJava 檔。

此頁面的部分是根據 Android 開放原始碼專案所建立和共用的工作進行修改，並根據 Creative Commons 2.5 屬性授權中所述的詞彙使用。

建構函式

欄位

屬性

方法

明確介面實作

擴充方法

適用於