Returns true is device has the Dalvik runtime. - Android Android OS

Android examples for Android OS:System Model

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Description

Returns true is device has the Dalvik runtime.

Demo Code


//package com.java2s;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Main {
    private static final String SELECT_RUNTIME_PROPERTY = "persist.sys.dalvik.vm.lib";
    private static final String LIB_DALVIK = "libdvm.so";
    private static final String LIB_ART = "libart.so";
    private static final String LIB_ART_D = "libartd.so";
    private static final String TAG_UNKNOWN = "Unknown";
    private static final String TAG_DALVIK = "Dalvik";
    private static final String TAG_ART = "ART";
    private static final String TAG_ART_DEBUG_BUILD = "ART debug build";

    /** Returns true is device has the Dalvik runtime. Returns false if ART or unknown. */
    public static final boolean isRuntimeDalvik() {
        return getCurrentRuntimeValue().equalsIgnoreCase(TAG_DALVIK);
    }/*  ww  w .jav  a 2  s  .  c  o  m*/

    /** Returns the name of the current runtime TAG_DALVIK, TAG_ART, TAG_ART_DEBUG_BUILD. Or, TAG_UNKNOWN if unknown.
     * 
     * Instead of returning exceptions this just returns TAG_UNKNOWN because YAGNI (You Ain't Gonna Need It)
     * 
     *  @return current runtime */
    private static final String getCurrentRuntimeValue() {
        try {
            Class<?> systemProperties = Class
                    .forName("android.os.SystemProperties");
            try {
                Method get = systemProperties.getMethod("get",
                        String.class, String.class);
                if (get == null) {
                    // Hopefully, this never happens
                    return TAG_UNKNOWN;
                }
                try {
                    final String value = (String) get.invoke(
                            systemProperties, SELECT_RUNTIME_PROPERTY, /* Assuming default is */
                            "Dalvik");
                    if (LIB_DALVIK.equals(value)) {
                        return TAG_DALVIK;
                    } else if (LIB_ART.equals(value)) {
                        return TAG_ART;
                    } else if (LIB_ART_D.equals(value)) {
                        return TAG_ART_DEBUG_BUILD;
                    }

                    return value;
                } catch (IllegalAccessException e) {
                    //                    return "IllegalAccessException";
                } catch (IllegalArgumentException e) {
                    //                    return "IllegalArgumentException";
                } catch (InvocationTargetException e) {
                    //                    return "InvocationTargetException";
                }
            } catch (NoSuchMethodException e) {
                //                return "SystemProperties.get(String key, String def) method is not found";
            }
        } catch (ClassNotFoundException e) {
            //            return "SystemProperties class is not found";
        }

        return TAG_UNKNOWN;
    }
}

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