这期内容当中小编将会给大家带来有关怎么在Android中使用progressbar实现带底部指示器和文字进度条,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
列出源码:
public class TextProgressBar extends LinearLayout {
String text;
Paint mPaint;
private Rect textRect;
private Bitmap bitmap;
private ProgressBar progressBar;
int progress;
int proWidth, proHeight;
public TextProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initText(context);
}
public TextProgressBar(Context context) {
super(context);
initText(context);
}
public TextProgressBar(Context context, AttributeSet attrs) {
super(context, attrs);
initText(context);
}
@Override
protected synchronized void onDraw(Canvas canvas) {
super.onDraw(canvas);
progress = progressBar.getProgress();
if (progress == 0 || progress == progressBar.getMax())
return;
this.mPaint.getTextBounds(this.text, 0, this.text.length(), textRect);
proWidth = progressBar.getWidth();
proHeight = progressBar.getHeight();
//画指示器
int bitmapx = (int) (progressBar.getLeft() + proWidth * ((progress * 1f) / progressBar.getMax())) - bitmap.getWidth() / 2;
int bitmapy = proHeight + bitmap.getHeight() / 2;
if (bitmapx < 0)
bitmapx = progressBar.getLeft();
if(bitmapx > progressBar.getRight()-bitmap.getWidth())
bitmapx = progressBar.getRight()-bitmap.getWidth();
canvas.drawBitmap(bitmap, bitmapx, bitmapy, mPaint);
//写字
int tvx = (int) (progressBar.getLeft() + proWidth * ((progress * 1f) / progressBar.getMax())) - textRect.centerX();
int tvy = proHeight + bitmap.getHeight() * 2 + 4;
if (tvx < 0)
tvx = progressBar.getLeft();
if(tvx >= progressBar.getRight()-textRect.width())
tvx = progressBar.getRight()-textRect.width();
canvas.drawText(this.text, tvx, tvy + bitmap.getHeight(), this.mPaint);
}
//初始化,画笔
private void initText(Context context) {
View inflate = View.inflate(context, R.layout.textprogressbar, this);
progressBar = (ProgressBar) inflate.findViewById(R.id.progressbar1);
progressBar.setProgress(50);
setWillNotDraw(false);
this.mPaint = new Paint();
this.mPaint.setColor(getResources().getColor(R.color.red));
this.mPaint.setTextSize(20);
textRect = new Rect();
text = "0";
bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.progress_top);
}
public void setProgress(int progress) {
progressBar.setProgress(progress);
}
public void setText(String str) {
text = str;
}
}
上述就是小编为大家分享的怎么在Android中使用progressbar实现带底部指示器和文字进度条了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。
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