Hello everyone, i'm in the process of creating a application manager/
killer for my high school senior project. Unfortunately i'm running
into the issue of my view not refreshing graphically with my updated
list. The application killing works but the list refreshing after
killing the application does not. My application seems to refresh the
view when you hit the back button and re-opening my application but
hitting the home button and re-opening my application doesn't.
Note - All experimenting has been done on the emulator and not on my
Droid yet.
My Code:
public class NTaskManager extends ListActivity implements
DialogInterface.OnClickListener{
//Recreation of RunningAppProcessInfo class that is able to return
its process name
public class NRunningAppProcessInfo extends
ActivityManager.RunningAppProcessInfo{
public
NRunningAppProcessInfo(ActivityManager.RunningAppProcessInfo
n){
this.importance = n.importance;
this.importanceReasonCode = n.importanceReasonCode;
this.importanceReasonComponent =
n.importanceReasonComponent;
this.importanceReasonPid = n.importanceReasonPid;
this.lru = n.lru;
this.pid = n.pid;
this.pkgList = n.pkgList;
this.processName = n.processName;
this.uid = n.uid;
}
public String toString(){
return this.processName;
}
}
//Pop up dialog box when user clicks on an item on the list
public void onClick(DialogInterface dialog, int which){
String f = String.valueOf(Process.myUid());
if (which == AlertDialog.BUTTON_POSITIVE){
searchAndKillTask();
}
else if(which == AlertDialog.BUTTON_NEGATIVE){
Toast.makeText(this, f, Toast.LENGTH_LONG).show();
}
}
//Declare variables and lists
boolean hasNextCheck = true;
private static final int REFRESH = 0;
boolean isPrevious;
boolean isNext;
String taskToBeKilled = "";
LinkedList<NRunningAppProcessInfo> processes; //List that will hold
object names
List<ActivityManager.RunningAppProcessInfo> x; //List containing
objects that hold application information
ActivityManager z; //Manages applications such as ending them
ListIterator<ActivityManager.RunningAppProcessInfo> i; //List
iterator
ArrayAdapter<NRunningAppProcessInfo> processliststring;
ListView lv;
AlertDialog.Builder adb; //Alert dialog box builder for clicking of
an item
/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Assign the linked list
processes = new LinkedList<NRunningAppProcessInfo>();
//Assign the activity manager
z = (ActivityManager)getSystemService(ACTIVITY_SERVICE);
//Give the list application information
x = z.getRunningAppProcesses();
//Add processes to linked list for list adapter and show it
this.refreshList();
//Create an alert dialog box...
adb = new AlertDialog.Builder(this);
//...If yes kill task...
adb.setPositiveButton("Yes", this);
//...If no do nothing
adb.setNegativeButton("No", this);
//When an item on the list is pressed
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//Set text to ask if they want to kill the task
adb.setMessage("Kill Task "+
((TextView)view).getText().toString() + "?");
taskToBeKilled = ((TextView)view).getText().toString();
//Show the alert dialog box
adb.show();
refreshList();
}
});
}
private void refreshList(){
//Clear the list to start fresh
processes.clear();
//Refresh the list iterator
i = x.listIterator();
//Loop...
do{
//Check if there is something next on the list
isNext = i.hasNext();
//If there is...
if(isNext == true){
//Add the process to the process list
processes.add(new NRunningAppProcessInfo(i.next()));
}
}while(isNext == true);//...while there is something next on
the list
//Set the list of strings to be used for the listview
processliststring = new
ArrayAdapter<NRunningAppProcessInfo>(this, layout.ntask_list,
(List<NRunningAppProcessInfo>)processes);
setListAdapter(processliststring);
//View the list of processes
lv = getListView();
lv.setTextFilterEnabled(true);
}
private void searchAndKillTask(){
RunningAppProcessInfo task;
i = x.listIterator();
hasNextCheck = i.hasNext();
do{
//Check if there is something next on the list
isNext = i.hasNext();
//If there is...
if(isNext == true){
//Check if the name matches the task to be killed
task = i.next();
if(task.processName == taskToBeKilled){
android.os.Process.killProcess(task.pid);
z.restartPackage(task.processName);
}
}
}while(isNext == true);//...while there is something next on
the list
}
/* Creates the menu items */
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0, REFRESH, 0, "Refresh")
.setIcon(android.R.drawable.ic_menu_rotate);
Toast.makeText(this, String.valueOf(hasNextCheck),
Toast.LENGTH_SHORT);
return true;
}
/* Handles item selections */
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case REFRESH:
refreshList();
return true;
}
return false;
}
}
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