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我正在使用以下代碼在地圖上標記標記。請指導我如何從代碼中將當前位置的方向線繪製到此點。像從源目的地指向的線google map directons
String loc ="";
String city ="s";
String address = loc + city
+ ";
String cleanAddress = address.replace(",", "");
cleanAddress = cleanAddress.replace(' ', '+');
try {
Intent geoIntent = new Intent("android.intent.action.VIEW", android.net.Uri.parse("geo:0,0?q="
+ cleanAddress));
startActivity(geoIntent);
}