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| /**
* Created by Lrxc on 2018/6/13.17:17
* Email: Lrxc1117@163.com
*/
public class MyView extends View {
private final int screenWidth;//屏幕宽度
private final TextPaint textPaint;//画笔
private final int textSize = 50;//画笔大小
private final Bitmap logo;//logo图片
private final int logoPadingTop = 200;//logo上边距
private final String str = "我仰望星空，浩瀚的银河系，哪一颗才是属于我的那个你？无论你在哪里，我都等着你，盼着你，直到遇见你。如果你看见了我，请你一定联系我，请不要让我等的太久，我会遗憾陪伴你的日子太过短暂。" +
"我仰望星空，浩瀚的银河系，哪一颗才是属于我的那个你？无论你在哪里，我都等着你，盼着你，直到遇见你。如果你看见了我，请你一定联系我，请不要让我等的太久，我会遗憾陪伴你的日子太过短暂";
public MyView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
textPaint = new TextPaint();
textPaint.setTextSize(textSize);
textPaint.setColor(Color.RED);
DisplayMetrics dm = getResources().getDisplayMetrics();
screenWidth = dm.widthPixels;
logo = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//绘制logo
canvas.drawBitmap(logo, screenWidth - logo.getWidth() - 5, logoPadingTop, null);
//绘制不规则文字
lineFeed(canvas, str, textSize);
}
/**
* @param canvas 画布
* @param str 绘制内容
* @param heigth 每一行的高度
*/
private void lineFeed(Canvas canvas, String str, int heigth) {
int lineWidth = screenWidth;
//右边有logo 空出位置
if (heigth >= logoPadingTop && heigth <= logoPadingTop + logo.getHeight() + textSize) {
lineWidth = screenWidth - logo.getWidth();
}
//计算当前宽度(width)能显示多少个汉字
int subIndex = textPaint.breakText(str, 0, str.length(), true, lineWidth, null);
//截取可以显示的汉字
String mytext = str.substring(0, subIndex);
canvas.drawText(mytext, 0, heigth, textPaint);
//计算剩下的汉字
String ss = str.substring(subIndex, str.length());
if (ss.length() > 0) {
lineFeed(canvas, ss, heigth + textSize + 10);
}
}
}
|
