android通过反射来获取系统属性SystemProperties
16lz
2021-01-23
private Method getLongMethod = null;private Method getStringMethod = null;private Method getIntMethod = null;private Method getBooleanMethod = null;public long getLong(final String key, final long def) { try { if (getLongMethod == null) { getLongMethod = Class.forName("android.os.SystemProperties").getMethod("getLong", String.class, long.class); } return ((Long) getLongMethod.invoke(null, key, def)).longValue(); } catch (Exception e) { return def; }}public String getStringMethod(final String key, final String def) { try { if (getStringMethod == null) { getStringMethod = Class.forName("android.os.SystemProperties").getMethod("get", String.class, String.class); } return ((String) getStringMethod.invoke(null, key, def)).toString(); } catch (Exception e) { return def; }}public int getIntMethod(final String key, final int def) { try { if (getIntMethod == null) { getIntMethod = Class.forName("android.os.SystemProperties") .getMethod("getInt", String.class, int.class); } return ((Integer) getIntMethod.invoke(null, key, def)).intValue(); } catch (Exception e) { return def; }}public boolean getBooleanMethod(final String key, final boolean def) { try { if (getBooleanMethod == null) { getBooleanMethod = Class.forName("android.os.SystemProperties").getMethod("getBoolean", String.class, boolean.class); } return ((Boolean) getBooleanMethod.invoke(null, key, def)).booleanValue(); } catch (Exception e) { return def; }}
//通过反射设置系统属性
public static void setProperty(String key, String value) { try { Class<?> c = Class.forName("android.os.SystemProperties"); Method set = c.getMethod("set", String.class, String.class); set.invoke(c, key, value ); } catch (Exception e) { e.printStackTrace(); }}
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