我一直在努力寻找一个可以执行seekmark.markPlace()的监听器。该函数接受我的布局中定义的seekBar的尺寸和填充。当我从onCreate调用该函数时,它返回0表示seekBar的值。我需要一个可以调用onCreate之外的函数的监听器。该功能仅在旋转屏幕时才会运行(当创建layout-land时)。
public class seekMark {
private int seekLength; // in pixels
private int seekLeftPad; // in pixels
private int seekBottomPad; // in pixels
private int trackLength; // in ms
public seekMark(){
seekLength = progressBar.getWidth();
seekLeftPad = progressBar.getPaddingLeft();
seekBottomPad = progressBar.getPaddingBottom();
trackLength = player.getDuration();
}
private int pxPerMs(){
return (seekLength/trackLength);
}
public void markPlace() throws XmlPullParserException, IOException {
Drawable marker = context.getResources().getDrawable(R.drawable.audio);
int y = seekBottomPad;
int x = 0;
int w = marker.getIntrinsicWidth();
int h = marker.getIntrinsicHeight();
int[] bmPos = markPxList(); // returns a list of px (from the left) read from a xml database
for(int i = 0; i <= bmPos.length; i++){
x = bmPos[i] + seekLeftPad;
marker.setBounds( x, y, x + w, y + h );
marker.draw( canvas );
}
}
}
是否可以像onRotate()那样创建自己的监听器?
答案 0 :(得分:0)
由于onCreate将在设备旋转时被调用,为什么不使用私有变量来存储显示的方向。每次调用onCreate()时,您都可以进行比较以查看显示方向是否已更改:
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
int rotation = display.getRotation();
if(rotation != mPreviousRotation) {
mPreviousRotation = rotation;
// Insert code for handling rotation here
}
我将在第一次调用onCreate()时决定如何处理mPreviousRotation变量的初始化。