Android Print Log on screen

Android development needs to quickly locate the problem, print log on the Android screen, is a good channel

Basic idea: Start Logservice read the specified log, use WindowManager to display on the screen

Directly on the code

public class Logservice extends Service {

Private ListView ListView;
Private linkedlist<logline> loglist = new linkedlist<logline> ();
Private Logadapter Madapter;
Private final int max_line = 500;
Private SimpleDateFormat Logcat_time_format = new SimpleDateFormat ("HH:mm:ss. SSS ");
Private Thread Readlog;
Private Boolean isallowreadlog = false;

@Override
Public IBinder Onbind (Intent arg0) {
return null;
}

@Override
public int Onstartcommand (Intent Intent, int flags, int startid) {

Utility.log_tag for the custom logstring,service reads this LOG

Readlog = new Thread (new Logreaderthread (Utility.log_tag));
Readlog.start ();
Createsystemwindow ();
Isallowreadlog = true;
return start_sticky;
}

@Override
public void OnDestroy () {
Removesystemwindow ();
Isallowreadlog = false;
Super.ondestroy ();
}

private void Createsystemwindow () {
Final Windowmanager.layoutparams LP = new Windowmanager.layoutparams (ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY, 0, pixelformat.translucent);
Lp.gravity=gravity.left| Gravity.top; Adjust the hover window to the upper left corner
Set the X, Y initialization as the origin in the upper-left corner of the screen.
lp.x=0;
lp.y=0;
Final Layoutinflater inflator = (layoutinflater) getsystemservice (Context.layout_inflater_service);
Final WindowManager wm = (WindowManager) getsystemservice (Window_service);
ListView = (ListView) inflator.inflate (R.layout.log_window, NULL);
Loglist = new linkedlist<logline> ();
Madapter = new Logadapter (this, loglist);
Listview.setadapter (Madapter);
if (Isallowreadlog) {
Wm.addview (listview, LP);
}

}

private void Removesystemwindow () {
if (ListView! = null && listview.getparent () = null) {
Final WindowManager wm = (WindowManager) getsystemservice (Window_service);
Wm.removeviewimmediate (listview);
}
}

Class Logadapter extends Arrayadapter<logline> {

Private Layoutinflater inflator = (layoutinflater) getsystemservice (Context.layout_inflater_service);

Public Logadapter (context context, list<logline> objects) {
Super (context, 0, objects);
}

public void Add (Logline line) {
Loglist.add (line);
Notifydatasetchanged ();
}

@Override
Public logline getItem (int position) {
return Loglist.get (position);
}

@Override
public int GetCount () {
return Loglist.size ();
}

@Override
Public View GetView (int position, View Convertview, ViewGroup parent) {
Logline line = GetItem (position);
Viewholder Holder;
if (Convertview = = null) {
Holder = new Viewholder ();
Convertview = Inflator.inflate (R.layout.log_line, parent, false);
Holder.time = (TextView) Convertview.findviewbyid (r.id.log_time);
Holder.content = (TextView) Convertview.findviewbyid (r.id.log_content);
Convertview.settag (holder);
} else {
Holder = (viewholder) convertview.gettag ();
}
Holder.time.setText (Line.time);
Holder.content.setText (line.content);
if (Line.color! = 0) {
Holder.content.setTextColor (Line.color);
} else {
Holder.content.setTextColor (Getresources (). GetColor (Android. R.color.white));
}
return convertview;
}

}

Class Viewholder {
public TextView time;
public TextView content;
}

Class Logreaderthread implements Runnable {

private String filter;

Public Logreaderthread (String filter) {
This.filter = filter;
}

@Override
public void Run () {
Process mlogcatproc = null;
BufferedReader reader = null;
try {
Mlogcatproc = Runtime.getruntime (). EXEC (new string[] {"Logcat", filter + "*:s"});
reader = new BufferedReader (New InputStreamReader (Mlogcatproc.getinputstream ()));
String Line;

while (Isallowreadlog) {
if (line = Reader.readline ()) = null) {
Message msg = new Message ();
Msg.obj = line;
Handler.sendmessage (msg);
}
}
} catch (Exception e) {
E.printstacktrace ();
}
}
}

private void Buildlogline (String line) {
Logline log = new Logline ();
Log.time = Logcat_time_format.format (New Date ()) + ":";
if (Line.startswith ("I")) {
Log.color = Color.parsecolor ("#008f86");
} else if (Line.startswith ("V")) {
Log.color = Color.parsecolor ("#fd7c00");
} else if (Line.startswith ("D")) {
Log.color = Color.parsecolor ("#8f3aa3");
} else if (Line.startswith ("E")) {
Log.color = Color.parsecolor ("#fe2b00");
}
if (Line.contains (")")) {
line = line.substring (Line.indexof (")") + 1, line.length ());
}
Log.content = line;

while (Loglist.size () > Max_line) {
Loglist.remove ();
}
Madapter.add (log);
}

Private Handler Handler = new Handler () {
public void Handlemessage (Message msg) {
Buildlogline (Msg.obj.toString ());
};
};

}

Entity class

public class Logline {

public String time;
public String content;
public int color;

}

Start Server,log will output to the screen, Android share!

Android Print Log on screen