android sqlite multiple threads

does not want any delay because the scrolling is very fast. This is very difficult for low-end mobile phones such as G1. Therefore, one way Google engineers come up with is to make the screen black and use a black bitmap to cover the listview while scrolling, instead of drawing many items in the intermediate process, thus improving performance. Item has its own background covering the selector cursor: add an attribute to listview in XML: Android: dra

{....... Omit section here} super.run (); } } 2.4 Saving breakpointsStoring breakpoint information in the Downloadthread download thread above is saved in the form of a database.Mthreaddao. Updatethread (threadinfo. GETURL (),threadinfo//update database corresponding thread information3 Other Auxiliary classes(1) The database operation class Threaddaoimpl, the breakpoint information increases, changes, checks, deletes.(2) Callback interface ondownload, download progress and download c

private final static int max_size = 3; Maximum number of common threads private final static int queue_size = 20; Thread buffer queue capacity private final static long alive_time = 10; Maximum idle duration allowed by a thread private final static timeunit t_unit = Timeunit.seconds; Idle duration unit: Seconds private static blockingqueue3, adapter writingAt Adpter, we just need to write a few lines of code.Get the path string url = Constant.pic_bas

program exited.You can use the cleanup history stack method to subtly close all activity, first using a set to invisible activity A to start the program, this activity A is only used to cushion the bottom of the stack,Only the startup and exit programs will use this activity, and when you need to exit, just jump to this activity A and let A finish to close all of the activity itself.New Intent (); Intent.setclass (B. This, A.class); // b for the activity where you press the exit button In

the transaction is committed, and the user cannot navigate back to it. In this case, if addToBackStack () is called when a fragment is removed, the fragment will be stopped. If the user returns the navigation, the fragment will be restored. In addition, for each fragment transaction, you can apply a transaction animation by calling setTransition () before committing the transaction. Calling commit () does not execute transactions immediately. On the contrary, it schedules transactions. Once pre