isAndroid0() — netty Function Reference

Architecture documentation for the isAndroid0() function in PlatformDependent0.java from the netty codebase.

Function java CommonUtil Internal calls 1

Entity Profile

CommonUtil→ Internal→ isAndroid0() — netty Function Reference

Dependency Diagram

graph TD
  3ff615de_7832_58ad_d48c_9ac0f11e5783["isAndroid0()"]
  be4c38f2_d236_e498_c295_1033d2617879["PlatformDependent0"]
  3ff615de_7832_58ad_d48c_9ac0f11e5783 -->|defined in| be4c38f2_d236_e498_c295_1033d2617879
  2cae8627_cae5_091a_fce1_110ca16bdb9c["equals()"]
  3ff615de_7832_58ad_d48c_9ac0f11e5783 -->|calls| 2cae8627_cae5_091a_fce1_110ca16bdb9c
  style 3ff615de_7832_58ad_d48c_9ac0f11e5783 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

common/src/main/java/io/netty/util/internal/PlatformDependent0.java lines 1131–1145

    private static boolean isAndroid0() {
        // Idea: Sometimes java binaries include Android classes on the classpath, even if it isn't actually Android.
        // Rather than check if certain classes are present, just check the VM, which is tied to the JDK.

        // Optional improvement: check if `android.os.Build.VERSION` is >= 24. On later versions of Android, the
        // OpenJDK is used, which means `Unsafe` will actually work as expected.

        // Android sets this property to Dalvik, regardless of whether it actually is.
        String vmName = SystemPropertyUtil.get("java.vm.name");
        boolean isAndroid = "Dalvik".equals(vmName);
        if (isAndroid) {
            logger.debug("Platform: Android");
        }
        return isAndroid;
    }