当滑动时:数值显示,滑动停止时显示数字,使用FrameLayout结合SeekBar。
首先我们看看。
Layout:
<?xml version="1.0" encoding="utf-8"?><merge xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"> <RelativeLayoutandroid:id="@+id/wrapper_seekbar_indicator"android:layout_width="wrap_content"android:layout_height="wrap_content"><ImageView android:id="@+id/img_seekbar_indicator" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" /><TextView android:id="@+id/txt_seekbar_indicated_progress" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:textColor="#333333" android:textSize="@dimen/space_12" tools:text="100" /> </RelativeLayout> <RelativeLayoutandroid:id="@+id/wrapper_seekbar"android:layout_width="wrap_content"android:layout_height="wrap_content"><SeekBar android:id="@+id/seekbar" style="@style/Widget.SeekBar.Normal" android:layout_width="match_parent" android:layout_height="wrap_content" /> </RelativeLayout></merge>需要自定义可再上面修改图片问题颜色等,或者自己封装起来。
private void init(Context context, AttributeSet attrs, int defStyle) {View view = LayoutInflater.from(context).inflate(R.layout.view_seekbar_indicated, this);bindViews(view);if (attrs != null) setAttributes(context, attrs, defStyle);mSeekBar.setOnSeekBarChangeListener(this);mTextViewProgress.setText(String.valueOf(mSeekBar.getProgress()));getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { @TargetApi(Build.VERSION_CODES.JELLY_BEAN) @Override public void onGlobalLayout() {mMeasuredWidth = mSeekBar.getWidth()- mSeekBar.getPaddingLeft()- mSeekBar.getPaddingRight();mSeekBar.setPadding(mSeekBar.getPaddingLeft(),mSeekBar.getPaddingTop()+ mWrapperIndicator.getHeight(),mSeekBar.getPaddingRight(),mSeekBar.getPaddingBottom());setIndicator();getViewTreeObserver().removeOnGlobalLayoutListener(this); }});// mWrapperIndicator.setVisibility(View.GONE); }主要是根据是否有改变,和触摸进行判断字和图片的显示。
@Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {setIndicator();if (mOnSeekBarChangeListener != null) mOnSeekBarChangeListener.onProgressChanged(seekBar, progress, fromUser); } @Override public void onStartTrackingTouch(SeekBar seekBar) {if (mOnSeekBarChangeListener != null) { mOnSeekBarChangeListener.onStartTrackingTouch(seekBar); mWrapperIndicator.setVisibility(View.VISIBLE);} } @Override public void onStopTrackingTouch(SeekBar seekBar) {if (mOnSeekBarChangeListener != null) { mOnSeekBarChangeListener.onStopTrackingTouch(seekBar); mWrapperIndicator.setVisibility(View.GONE);} }废话也不多说,原理很简单。