How to find the Android version name programmatically?

Question

I write code for finding the Android version like this

String version=Build.VERSION.RELEASE;

by using this code I am get the version number but I want version name. how to get the version name?

Answer 1

As suggested earlier, reflection seems to be the key to this question. The StringBuilder and extra formatting is not required, it was added only to illustrate usage.

import java.lang.reflect.Field;
...

StringBuilder builder = new StringBuilder();
builder.append("android : ").append(Build.VERSION.RELEASE);

Field[] fields = Build.VERSION_CODES.class.getFields();
for (Field field : fields) {
    String fieldName = field.getName();
    int fieldValue = -1;

    try {
        fieldValue = field.getInt(new Object());
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (NullPointerException e) {
        e.printStackTrace();
    }

    if (fieldValue == Build.VERSION.SDK_INT) {
        builder.append(" : ").append(fieldName).append(" : ");
        builder.append("sdk=").append(fieldValue);
    }
}

Log.d(LOG_TAG, "OS: " + builder.toString());

On my 4.1 emulator, I get this output:

D/MainActivity( 1551): OS: android : 4.1.1 : JELLY_BEAN : sdk=16

Enjoy!

Answer 2

Optimized code, this will work:

import java.lang.reflect.Field;

Field[] fields = Build.VERSION_CODES.class.getFields();
String osName = fields[Build.VERSION.SDK_INT + 1].getName();
Log.d("Android OsName:",osName);

Answer 3

After API 28 (Android Pie), Build.VERSION_CODES were changed some fields.

So, if you using:

Field[] fields = Build.VERSION_CODES.class.getFields();
String osName = fields[Build.VERSION.SDK_INT + 1].getName();

will cause your app crash immediately because of Out Of Range Exception.

The solution for all API level is:

Field[] fields = Build.VERSION_CODES.class.getFields();
String codeName = "UNKNOWN";
for (Field field : fields) {
    try {
        if (field.getInt(Build.VERSION_CODES.class) == Build.VERSION.SDK_INT) {
            codeName = field.getName();
        }
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
}

Or in Kotlin with Java 8's style:

val fields = Build.VERSION_CODES::class.java.fields
var codeName = "UNKNOWN"
fields.filter { it.getInt(Build.VERSION_CODES::class) == Build.VERSION.SDK_INT }
      .forEach { codeName = it.name }

Answer 4

http://developer.android.com/reference/android/os/Build.VERSION_CODES.html contains fields that have the name you're looking for. So you could use reflexion to find which field corresponds to the "version" value.

Why do you want the name ?

Answer 5

You will get the information from these

android.os.Build.VERSION_CODES 

android.os.Build.VERSION.SDK_INT

More information can be had from this link:

Retrieving Android API version programmatically

Hope this will help you.