Android开发之TextView排版问题

下面直接是关于解决该问题的代码（根据别人的代码进行了修正以及测试，保证可以修改字体尺寸、颜色、根据padding调整，如果需要支持其他的格式可以将对应的属性添加至Paint类型的对象中）：

public class NsTextView extends TextView {
    private String text;
    private float textSize;
    private float paddingLeft;
    private float paddingRight;
    private int textColor;
    private Paint paint1 = new Paint();
    private float textShowWidth;

    public NsTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        text = this.getText().toString();
        textSize = this.getTextSize();
        textColor = this.getTextColors().getDefaultColor();
        paddingLeft = this.getPaddingLeft();
        paddingRight = this.getPaddingRight();
        paint1.setTextSize(textSize);
        paint1.setColor(textColor);
        paint1.setAntiAlias(true);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        textShowWidth = this.getMeasuredWidth() - paddingLeft - paddingRight;
        int lineCount = 0;
        text = this.getText().toString();
        if (text == null)
            return;
        char[] textCharArray = text.toCharArray();
        float drawedWidth = 0;
        float charWidth;
        for (int i = 0; i < textCharArray.length; i++) {
            charWidth = paint1.measureText(textCharArray, i, 1);
            if (textCharArray[i] == '
') {
                lineCount++;
                drawedWidth = 0;
                continue;
            }
            if (textShowWidth - drawedWidth < charWidth) {
                lineCount++;
                drawedWidth = 0;
            }
            canvas.drawText(textCharArray, i, 1, paddingLeft + drawedWidth,
                    (lineCount + 1) * textSize, paint1);
            drawedWidth += charWidth;
        }
        setHeight((int) ((lineCount + 1) * (int) textSize ));
    }
}