查詢聯繫人通話總時長
String[] PROJECTION = {Calls.DURATION};
Cursor c = getContentResolver().query(Calls.CONTENT_URI,PROJECTION ,null,null,null);
long duration = 0
long time= 0
if(c != null && c.moveToFirst()){
do {
duration = c.getLong(0);
time += duration ;
} while(c.moveToNext());
}
if(c != null){
c.close();
}
要加權限 ：<uses-permission android:name="android.permission.READ_CALL_LOG" />
