我是新來的機器人,但我設法遵循幾個教程讓我開始..我想要做的是使用三個按鈕出現一旦用戶已經觸摸屏幕上的更多警報對話框更多比2(秒)我遇到的問題是ALERTDIALOG框不會出現在地圖上,當我啓動它..我沒有得到任何錯誤?所以有人可以幫助我。AlertDialog不會出現在GoogleMap上。恐慌
下面是我的代碼....
long start;
long stop;
//reference map from citymap.xml file
map = (MapView) findViewById(R.id.mvMain);
// Enable zoom features
map.setBuiltInZoomControls(false);
//Declaring the instance Interaction
Interact t = new Interact();
//declaring a list of overlays
List<Overlay> overlayList = map.getOverlays();
// interact t in to overlay list.
overlayList.add(t);
class Interact extends Overlay {
public boolean OnTouchEvent(MotionEvent e, MapView m){
// initiating motion event action down
if(e.getAction() == MotionEvent.ACTION_DOWN){
// set start time
start = e.getEventTime();
}
// Initiating motion event action up: when the user stops on touch event
if(e.getAction() == MotionEvent.ACTION_UP){
// set end time
stop = e.getEventTime();
}
// calculating the time to project an alert dialog
if (stop > 1500){
Toast.makeText(CityMap.this, "toast meee", 50000).show();
//perform an action, create alert dialog box
AlertDialog.Builder builder = new AlertDialog.Builder(CityMap.this).create();
builder.setTitle("Select an Option");
builder.setCancelable(true);
builder.setPositiveButton("Place pint Point", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
builder.create();
builder.show();
return true;
}
return true;
嘗試爲警報對話框指定z-index和背景顏色。 – Unknown 2012-03-30 02:21:53