Android seekbar 滑动时上方显示进度
16lz
2021-01-23
效果图：
java代码
public class SeekBarRelativeLayout extends RelativeLayout { public SeekBarRelativeLayout(Context context, AttributeSet attrs) { super(context, attrs); } public SeekBarRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } private TextView textView; private SeekBar seekBar; private SeekBar.OnSeekBarChangeListener onSeekBarChangeListener; private int textViewPaddingLeft = 0; private void setText(String str) { textView.setText(str); } private void setMarginLeftForTextView(int progress) { if (seekBar != null && textView != null) { LayoutParams layoutParams = (LayoutParams) textView.getLayoutParams(); int width = seekBar.getWidth() - seekBar.getPaddingLeft() - seekBar.getPaddingRight(); layoutParams.leftMargin = (int) (((float) progress / seekBar.getMax()) * width); layoutParams.leftMargin += seekBar.getPaddingRight() - textView.getWidth() / 2 + textViewPaddingLeft; setText(Integer.toString(progress)); textView.setLayoutParams(layoutParams); } } public void setProgress(int process) { if (seekBar != null) { seekBar.setProgress(process); } } public void setEnabled(boolean enabled) { if (seekBar != null) { seekBar.setEnabled(enabled); } } public void initSeekBar() { seekBar = (SeekBar) findViewById(R.id.seek_bar_relative_layout_seek_bar); textView = (TextView) findViewById(R.id.seek_bar_relative_layout_text_view); textView.setVisibility(INVISIBLE); textViewPaddingLeft = ((LayoutParams) textView.getLayoutParams()).leftMargin; if (seekBar != null && textView != null) { seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { setMarginLeftForTextView(progress); if (onSeekBarChangeListener != null) { onSeekBarChangeListener.onProgressChanged(seekBar, progress, fromUser); } } @Override public void onStartTrackingTouch(SeekBar seekBar) { if (onSeekBarChangeListener != null) { onSeekBarChangeListener.onStartTrackingTouch(seekBar); } textView.setVisibility(VISIBLE); } @Override public void onStopTrackingTouch(SeekBar seekBar) { if (onSeekBarChangeListener != null) { onSeekBarChangeListener.onStopTrackingTouch(seekBar); } textView.setVisibility(INVISIBLE); } }); } } public void setOnSeekBarChangeListener(SeekBar.OnSeekBarChangeListener onSeekBarChangeListener) { this.onSeekBarChangeListener = onSeekBarChangeListener; }}布局文件
<?xml version="1.0" encoding="utf-8"?><SeekBarRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="44dp" android:paddingLeft="30dp" android:paddingRight="30dp"> <TextView android:id="@id/seek_bar_relative_layout_describe" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="17.5dp" android:text="强度" android:textColor="@color/#909896" android:textSize="13sp" /> <TextView android:id="@id/seek_bar_relative_layout_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="24dp" android:text="0" android:textColor="@color/#909896" android:textSize="13sp" /> <SeekBar android:id="@id/seek_bar_relative_layout_seek_bar" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginLeft="25dp" android:background="@null" android:max="100" android:maxHeight="3px" android:minHeight="3px" android:progress="100" android:progressDrawable="@drawable/beauty_face_seek_bar" android:splitTrack="false" android:thumb="@drawable/beauty_thumb" />SeekBarRelativeLayout>实例化后，调用initSeekBar();进行初始化
github 源码：
https://github.com/shangriDong/SeekBar.git更多相关文章
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