在Android的Seekbar顶部显示文本视图

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:max="100"
        android:progress="0" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@id/seekBar"
        android:layout_alignRight="@id/seekBar"
        android:layout_alignEnd="@id/seekBar"
        android:layout_marginTop="-24dp"
        android:text="0"
        android:textSize="12sp" />

</RelativeLayout>

SeekBar seekBar = findViewById(R.id.seekBar);
final TextView textView = findViewById(R.id.textView);

seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        textView.setText(String.valueOf(progress));
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
        // 拖动开始时的操作
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        // 拖动结束时的操作
    }
});