Window
对象的addFlags()
和clearFlags()
方法来实现系统状态栏的隐藏和显示。隐藏时添加WindowManager.LayoutParams.FLAG_FULLSCREEN
标志,显示时清除该标志。Window
对象的addFlags()
和clearFlags()
方法来实现系统状态栏的隐藏和显示。隐藏时添加WindowManager.LayoutParams.FLAG_FULLSCREEN
标志,显示时清除该标志。onBackPressed()
方法来实现返回键的功能。当用户按下返回键时,系统会调用这个方法,你可以在这个方法中添加自定义的逻辑来处理返回事件。java,// 柱状图,BarChart barChart = findViewById(R.id.barChart);,List entries = new ArrayList();,entries.add(new BarEntry(0, 20));,entries.add(new BarEntry(1, 40));,entries.add(new BarEntry(2, 60));,BarDataSet dataSet = new BarDataSet(entries, "Label");,BarData barData = new BarData(dataSet);,barChart.setData(barData);,barChart.invalidate(); // refresh,,// 曲线图,LineChart lineChart = findViewById(R.id.lineChart);,List lineEntries = new ArrayList();,lineEntries.add(new Entry(0, 10));,lineEntries.add(new Entry(1, 30));,lineEntries.add(new Entry(2, 50));,LineDataSet lineDataSet = new LineDataSet(lineEntries, "Label");,LineData lineData = new LineData(lineDataSet);,lineChart.setData(lineData);,lineChart.invalidate(); // refresh,
``TextView
的marquee
属性和相应的代码设置来实现。PopupWindow
类。首先创建一个布局文件作为提示框的内容,然后在代码中创建PopupWindow
实例并设置其内容视图、大小和位置。java,public class DampingScrollView extends ScrollView {, private float mLastMotionY;, private float mDampingFactor = 0.5f; // 阻尼系数,, public DampingScrollView(Context context) {, super(context);, },, public DampingScrollView(Context context, AttributeSet attrs) {, super(context, attrs);, },, @Override, public boolean onTouchEvent(MotionEvent event) {, switch (event.getAction()) {, case MotionEvent.ACTION_DOWN:, mLastMotionY = event.getY();, break;, case MotionEvent.ACTION_MOVE:, float currentY = event.getY();, float deltaY = currentY mLastMotionY;, mLastMotionY = currentY;, scrollBy(0, (int) (deltaY * mDampingFactor));, return true;, }, return super.onTouchEvent(event);, },},
`,,这个自定义的
DampingScrollView类通过重写
onTouchEvent`方法来处理触摸事件,并在滑动时应用阻尼系数,从而实现下拉阻尼效果。Powered By Z-BlogPHP 1.7.3