RK:android 关于SystemProperties的使用

一.system权限
1.在AndroidManifest.xml中，在manifest加入android:sharedUserId="android.uid.system"
2.在Android.mk中，將LOCAL_CERTIFICATE := XXX修改成LOCAL_CERTIFICATE :=platform
3.import android.os.SystemProperties; import java.lang.reflect.Method;

二.SystemProperties

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Initial_password = SystemProperties.get("persist.passwd.install", "888888"); 2.1.getInt SystemProperties.set("persist.sys.dialog_install","1");   if(SystemProperties.getInt("persist.sys.dialog_install",0) == 1) {                 auxiliaryDialog.setChecked(true); }else{         auxiliaryDialog.setChecked(false); } 2.2.getBoolean SystemProperties.set("persist.rotation.limit","true");   if(SystemProperties.getBoolean("persist.rotation.limit",true)) {                 rotation_limit.setChecked(true); }else{         rotation_limit.setChecked(false); }

2.2.

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property_set("persist.sys.audio_device","1");   char pro_value[PROPERTY_VALUE_MAX] = "";          property_get("persist.audio.mic",pro_value,0);   ALOGD("persist.audio.mic mic_value %d", mic_value);

三.非系统开发，反射调用

3.1.getProperty

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@SuppressWarnings("finally") public String getProperty(String key) {     String value = "unknown";     try {         Class<?> c = Class.forName("android.os.SystemProperties");         Method get = c.getMethod("get", String.class, String.class);         value = (String) (get.invoke(c, key, "unknown"));     } catch (Exception e) {         e.printStackTrace();     } finally {         return value;     } }

3.2.setProperty

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public 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();     } }

 四.非系统开发，framework jar包调用 

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1	framework编译出   out\target\common\obj\JAVA_LIBRARIES\framework_intermediates