Alpha values to HEX for Android Material

The new thing from Google - Material - talks about alpha values for black and white ... so how to convert 87% to HEX? Thanks to this guy on stackoverlfow:

100% — ff
99% — fc
98% — fa
97% — f7
96% — f5
95% — f2
94% — f0
93% — ed
92% — eb
91% — e8
90% — e6
89% — e3
88% — e0
87% — de
86% — db
85% — d9
84% — d6
83% — d4
82% — d1
81% — cf
80% — cc
79% — c9
78% — c7
77% — c4
76% — c2
75% — bf
74% — bd
73% — ba
72% — b8
71% — b5
70% — b3
69% — b0
68% — ad
67% — ab
66% — a8
65% — a6
64% — a3
63% — a1
62% — 9e
61% — 9c
60% — 99
59% — 96
57% — 94
56% — 91
56% — 8f
55% — 8c
54% — 8a
53% — 87
52% — 85
51% — 82
50% — 80
49% — 7d
48% — 7a
47% — 78
46% — 75
45% — 73
44% — 70
43% — 6e
42% — 6b
41% — 69
40% — 66
39% — 63
38% — 61
37% — 5e
36% — 5c
35% — 59
34% — 57
33% — 54
32% — 52
31% — 4f
30% — 4d
28% — 4a
28% — 47
27% — 45
26% — 42
25% — 40
24% — 3d
23% — 3b
22% — 38
21% — 36
20% — 33
19% — 30
18% — 2e
17% — 2b
16% — 29
15% — 26
14% — 24
13% — 21
12% — 1f
11% — 1c
10% — 1a
09% — 17
08% — 14
07% — 12
06% — 0f
05% — 0d
04% — 0a
03% — 08
02% — 05
01% — 03
00% — 00

Android EditText - hide soft keyboard on focus but keep cursor visible

In my current android app I have a lot of input fields (EditText) and I need to disable the soft keyboard on focus, because I use my own kind of input widget.

I've try several solutions, but on some was the cursor not visible or the soft keyboard was blinking on focus for some ms. But this one works:

    public static void disableSoftKeyboard(final EditText v) {
        if (Build.VERSION.SDK_INT >= 11) {
            v.setRawInputType(InputType.TYPE_CLASS_TEXT);
            v.setTextIsSelectable(true);
        } else {
            v.setRawInputType(InputType.TYPE_NULL);
            v.setFocusable(true);
        }
    }

Kill Android AsyncTask if it hangs

I have an AsyncTask in my Android App that makes a network call. It may happen that the call for ever stuck. So I need a solution to handle this issue.


First I create a TimerTask that call cancel() to my AsyncTask:


class TaskKiller extends TimerTask {
private AsyncTask<?, ?, ?> mTask;
public TaskKiller(AsyncTask<?, ?, ?> task) {
this.mTask = task;
}

public void run() {
mTask.cancel(true);
}
}

Then I use this TimerTask with a timeout I need:

protected Boolean doInBackground(Object... params) {

Timer timer = new Timer();
timer.schedule(new TaskKiller(this), TIMEOUT);

// do some stuff, network, what ever can hangs
 // ...
// cancel the task if all things are done

timer.cancel();
}

onCancelled() will be called if your stuff needs longer than your timeout:

protected void onCancelled() {
// do something, inform user etc.
}