如何在Android中使用TextView创建自定义SeekBar?
如何在Android中使用TextView创建自定义SeekBar?,android,android-xml,android-custom-view,Android,Android Xml,Android Custom View,如何在Android中使用SeekBar或ProgressBar创建可移动的TextView?您可以使用写有文本的位图来代替TextView。像这样的 SeekBar timerBar = (SeekBar) findViewById(R.id.seekBarTimer); if (timerBar != null) { timerBar.setMax((int) (Settings.countdownSeconds + 1)); timerBar.setOnSeekBarCha
如何在Android中使用
SeekBar
或ProgressBar
创建可移动的TextView
?您可以使用写有文本的位图来代替TextView。像这样的
SeekBar timerBar = (SeekBar) findViewById(R.id.seekBarTimer);
if (timerBar != null) {
timerBar.setMax((int) (Settings.countdownSeconds + 1));
timerBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar arg0) {
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
}
@Override
public void onProgressChanged(SeekBar timerBar, int arg1, boolean arg2) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.seek_thumb);
Bitmap bmp = bitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas c = new Canvas(bmp);
String text = Integer.toString(timerBar.getProgress());
Paint p = new Paint();
p.setTypeface(Typeface.DEFAULT_BOLD);
p.setTextSize(14);
p.setColor(0xFFFFFFFF);
int width = (int) p.measureText(text);
int yPos = (int) ((c.getHeight() / 2) - ((p.descent() + p.ascent()) / 2));
c.drawText(text, (bmp.getWidth()-width)/2, yPos, p);
timerBar.setThumb(new BitmapDrawable(getResources(), bmp));
}
});
timerBar.setProgress(0);
}
您可以创建带有文字的位图,而不是textview。像这样的
SeekBar timerBar = (SeekBar) findViewById(R.id.seekBarTimer);
if (timerBar != null) {
timerBar.setMax((int) (Settings.countdownSeconds + 1));
timerBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar arg0) {
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
}
@Override
public void onProgressChanged(SeekBar timerBar, int arg1, boolean arg2) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.seek_thumb);
Bitmap bmp = bitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas c = new Canvas(bmp);
String text = Integer.toString(timerBar.getProgress());
Paint p = new Paint();
p.setTypeface(Typeface.DEFAULT_BOLD);
p.setTextSize(14);
p.setColor(0xFFFFFFFF);
int width = (int) p.measureText(text);
int yPos = (int) ((c.getHeight() / 2) - ((p.descent() + p.ascent()) / 2));
c.drawText(text, (bmp.getWidth()-width)/2, yPos, p);
timerBar.setThumb(new BitmapDrawable(getResources(), bmp));
}
});
timerBar.setProgress(0);
}
您可以创建带有文字的位图,而不是textview。像这样的
SeekBar timerBar = (SeekBar) findViewById(R.id.seekBarTimer);
if (timerBar != null) {
timerBar.setMax((int) (Settings.countdownSeconds + 1));
timerBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar arg0) {
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
}
@Override
public void onProgressChanged(SeekBar timerBar, int arg1, boolean arg2) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.seek_thumb);
Bitmap bmp = bitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas c = new Canvas(bmp);
String text = Integer.toString(timerBar.getProgress());
Paint p = new Paint();
p.setTypeface(Typeface.DEFAULT_BOLD);
p.setTextSize(14);
p.setColor(0xFFFFFFFF);
int width = (int) p.measureText(text);
int yPos = (int) ((c.getHeight() / 2) - ((p.descent() + p.ascent()) / 2));
c.drawText(text, (bmp.getWidth()-width)/2, yPos, p);
timerBar.setThumb(new BitmapDrawable(getResources(), bmp));
}
});
timerBar.setProgress(0);
}
您可以创建带有文字的位图,而不是textview。像这样的
SeekBar timerBar = (SeekBar) findViewById(R.id.seekBarTimer);
if (timerBar != null) {
timerBar.setMax((int) (Settings.countdownSeconds + 1));
timerBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar arg0) {
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
}
@Override
public void onProgressChanged(SeekBar timerBar, int arg1, boolean arg2) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.seek_thumb);
Bitmap bmp = bitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas c = new Canvas(bmp);
String text = Integer.toString(timerBar.getProgress());
Paint p = new Paint();
p.setTypeface(Typeface.DEFAULT_BOLD);
p.setTextSize(14);
p.setColor(0xFFFFFFFF);
int width = (int) p.measureText(text);
int yPos = (int) ((c.getHeight() / 2) - ((p.descent() + p.ascent()) / 2));
c.drawText(text, (bmp.getWidth()-width)/2, yPos, p);
timerBar.setThumb(new BitmapDrawable(getResources(), bmp));
}
});
timerBar.setProgress(0);
}