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@crossle
Created February 27, 2013 09:15
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Use the reflection invoke SystemProperites
import java.lang.reflect.Method;
public class SystemPropertiesProxy {
/**
* This class cannot be instantiated
*/
private SystemPropertiesProxy() {
}
/**
* Get the value for the given key.
*
* @return an empty string if the key isn't found
* @throws IllegalArgumentException if the key exceeds 32 characters
*/
public static String get(String key) throws IllegalArgumentException {
String ret = "";
try {
Class<?> SystemProperties = Class.forName("android.os.SystemProperties");
//Parameters Types
@SuppressWarnings("rawtypes")
Class[] paramTypes = { String.class };
Method get = SystemProperties.getMethod("get", paramTypes);
//Parameters
Object[] params = { key };
ret = (String) get.invoke(SystemProperties, params);
} catch (IllegalArgumentException iAE) {
throw iAE;
} catch (Exception e) {
ret = "";
//TODO
}
return ret;
}
/**
* Get the value for the given key.
*
* @return if the key isn't found, return def if it isn't null, or an empty
* string otherwise
* @throws IllegalArgumentException if the key exceeds 32 characters
*/
public static String get(String key, String def) throws IllegalArgumentException {
String ret = def;
try {
Class<?> SystemProperties = Class.forName("android.os.SystemProperties");
//Parameters Types
@SuppressWarnings("rawtypes")
Class[] paramTypes = { String.class, String.class };
Method get = SystemProperties.getMethod("get", paramTypes);
//Parameters
Object[] params = { key, def };
ret = (String) get.invoke(SystemProperties, params);
} catch (IllegalArgumentException iAE) {
throw iAE;
} catch (Exception e) {
ret = def;
//TODO
}
return ret;
}
/**
* Get the value for the given key, and return as an integer.
*
* @param key the key to lookup
* @param def a default value to return
* @return the key parsed as an integer, or def if the key isn't found or
* cannot be parsed
* @throws IllegalArgumentException if the key exceeds 32 characters
*/
public static Integer getInt(String key, int def) throws IllegalArgumentException {
Integer ret = def;
try {
Class<?> SystemProperties = Class.forName("android.os.SystemProperties");
//Parameters Types
@SuppressWarnings("rawtypes")
Class[] paramTypes = { String.class, int.class };
Method getInt = SystemProperties.getMethod("getInt", paramTypes);
//Parameters
Object[] params = { key, def };
ret = (Integer) getInt.invoke(SystemProperties, params);
} catch (IllegalArgumentException IAE) {
throw IAE;
} catch (Exception e) {
ret = def;
//TODO
}
return ret;
}
/**
* Get the value for the given key, and return as a long.
*
* @param key the key to lookup
* @param def a default value to return
* @return the key parsed as a long, or def if the key isn't found or cannot
* be parsed
* @throws IllegalArgumentException if the key exceeds 32 characters
*/
public static Long getLong(String key, long def) throws IllegalArgumentException {
Long ret = def;
try {
Class<?> SystemProperties = Class.forName("android.os.SystemProperties");
//Parameters Types
@SuppressWarnings("rawtypes")
Class[] paramTypes = { String.class, long.class };
Method getLong = SystemProperties.getMethod("getLong", paramTypes);
//Parameters
Object[] params = { key, def };
ret = (Long) getLong.invoke(SystemProperties, params);
} catch (IllegalArgumentException iAE) {
throw iAE;
} catch (Exception e) {
ret = def;
//TODO
}
return ret;
}
/**
* Get the value for the given key, returned as a boolean. Values 'n', 'no',
* '0', 'false' or 'off' are considered false. Values 'y', 'yes', '1', 'true'
* or 'on' are considered true. (case insensitive). If the key does not exist,
* or has any other value, then the default result is returned.
*
* @param key the key to lookup
* @param def a default value to return
* @return the key parsed as a boolean, or def if the key isn't found or is
* not able to be parsed as a boolean.
* @throws IllegalArgumentException if the key exceeds 32 characters
*/
public static Boolean getBoolean(String key, boolean def) throws IllegalArgumentException {
Boolean ret = def;
try {
Class<?> SystemProperties = Class.forName("android.os.SystemProperties");
//Parameters Types
@SuppressWarnings("rawtypes")
Class[] paramTypes = { String.class, boolean.class };
Method getBoolean = SystemProperties.getMethod("getBoolean", paramTypes);
//Parameters
Object[] params = { key, def };
ret = (Boolean) getBoolean.invoke(SystemProperties, params);
} catch (IllegalArgumentException iAE) {
throw iAE;
} catch (Exception e) {
ret = def;
//TODO
}
return ret;
}
/**
* Set the value for the given key.
*
* @throws IllegalArgumentException if the key exceeds 32 characters
* @throws IllegalArgumentException if the value exceeds 92 characters
*/
public static void set(String key, String val) throws IllegalArgumentException {
try {
Class<?> SystemProperties = Class.forName("android.os.SystemProperties");
//Parameters Types
@SuppressWarnings("rawtypes")
Class[] paramTypes = { String.class, String.class };
Method set = SystemProperties.getMethod("set", paramTypes);
//Parameters
Object[] params = { key, val };
set.invoke(SystemProperties, params);
} catch (IllegalArgumentException iAE) {
throw iAE;
} catch (Exception e) {
//TODO
}
}
}
@itstartstosnow
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Thanks! This code works well for me

@Abhilashken
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Does this work for android 11?
There are restrictions in using non-SDK components using reflection. Kindly update on this.

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