open a random fragment on create for android activity

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open a random fragment on create for android activity
randomFragmentNum = random.nextInt(100);
if (randomFragmentNum < 20) {
    randomFragmentNum = 0;
} else if (randomFragmentNum < 40) {
    randomFragmentNum = 1;
} else if (randomFragmentNum < 60) {
    randomFragmentNum = 2;
} else if (randomFragmentNum < 80) {
    randomFragmentNum = 3;
} else 
    randomFragmentNum = 4;
}
Created Time:2017-08-31 07:31:39  Author:lautturi