Android dynamic setId to avoid duplicate IDS

Android dynamic setId to avoid duplicate IDS

When two controls with the same id are added to a layout, an error occurs when two controls with the same id are added through findVIewById.

The solution is as follows:

1. View

generateViewId（）

Method to obtain an available id. Perform setId manually.

Api level 17 Required

The code of this function can be directly used below api level 17:

public static int generateViewId() {    for (;;) {        final int result = sNextGeneratedId.get();        // aapt-generated IDs have the high byte nonzero; clamp to the range under that.        int newValue = result + 1;        if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0.        if (sNextGeneratedId.compareAndSet(result, newValue)) {            return result;        }    }}

2. General methods:

Samples/ApiDemos/src/com/example/android/apis/RadioGroup1.java

Samples/ApiDemp/res/values/ids. xml

Declare an id item

Set the corresponding name through setId in java code

NewRadioButton. setId (R. id. snack );