「Android」DalvikまたはARTを判断する方法

2014年7月10日

サンプルコード下記：

package com.example.getcurrentruntimevalue;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;public class MainActivity extends Activity {
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";

@オーバーライド
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

TextView tv = (TextView)findViewById(R.id.current_runtime_value);
tv.setText(getCurrentRuntimeValue());
}

private CharSequence getCurrentRuntimeValue() {
try {
Class<?> systemProperties = Class.forName(“android.os.SystemProperties");
try {
Method get = systemProperties.getMethod(“get",
String.class, String.class);
if (get == null) {
return “WTF?!";
}
try {
final String value = (String)get.invoke(
systemProperties, SELECT_RUNTIME_PROPERTY,
/* Assuming default is */"Dalvik");
if (LIB_DALVIK.equals(value)) {
return “Dalvik";
} else if (LIB_ART.equals(value)) {
return “ART";
} else if (LIB_ART_D.equals(value)) {
return “ARTデバッグビルド";
}

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";
}
}}

参考URL:

http://stackoverflow.com/questions/19830342/how-can-i-detect-the-android-runtime-dalvik-or-art#