Intent android.content.Intent.setFlags(int flags)
public Intent setFlags (int flags)
Since: API Level 1
Set special flags controlling how this intent is handled. Most values here depend on the type of component being executed by the Intent, specifically the FLAG_ACTIVITY_* flags are all for use with Context.startActivity() and the FLAG_RECEIVER_* flags are
all for use with Context.sendBroadcast().
为了控制整个Intent的执行设置特定的标志。大多数的值依赖于通过Intent执行的所有类型组件，例如明确的有Context.startActivity()的FLAG_ACTIVITY_*标志和Context.sendBroadcast()的FLAG_RECEIVER_*标志。
See the Tasks and Back Stack documentation for important information on how some of these options impact the behavior of your application.
Parameters
flags The desired flags.
Returns
Returns the same Intent object, for chaining multiple calls into a single statement.
See Also
getFlags()
addFlags(int)
FLAG_GRANT_READ_URI_PERMISSION
FLAG_GRANT_WRITE_URI_PERMISSION
FLAG_DEBUG_LOG_RESOLUTION
FLAG_FROM_BACKGROUND
FLAG_ACTIVITY_BROUGHT_TO_FRONT
FLAG_ACTIVITY_CLEAR_TASK
FLAG_ACTIVITY_CLEAR_TOP
FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET
FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
FLAG_ACTIVITY_FORWARD_RESULT
FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY
FLAG_ACTIVITY_MULTIPLE_TASK
FLAG_ACTIVITY_NEW_TASK
FLAG_ACTIVITY_NO_ANIMATION
FLAG_ACTIVITY_NO_HISTORY
FLAG_ACTIVITY_NO_USER_ACTION
FLAG_ACTIVITY_PREVIOUS_IS_TOP
FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
FLAG_ACTIVITY_REORDER_TO_FRONT
FLAG_ACTIVITY_SINGLE_TOP
FLAG_ACTIVITY_TASK_ON_HOME
FLAG_RECEIVER_REGISTERED_ONLY
例如：
// Pressing on the button brings the user back to our mood ring,
// as part of the api demos app. Note the use of NEW_TASK here,
// since the notification display activity is run as a separate task.
Intent intent = new Intent(this, StatusBarNotifications.class);
intent.setAction(Intent.ACTION_MAIN);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);