Android 9.0之后獲取無法通過反射獲取系統屬性,如果我們需要知道手機某個屬性,可以通過以下的方式.注意:這種方式不能獲取所有的屬性.不然谷歌限制SystemProper的訪問就沒有意義了.

package com.tinno.android.appinfocollector.tools;import android.text.TextUtils; import android.util.Log; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.HashMap; import java.util.regex.Matcher; import java.util.regex.Pattern; public class SystemPropertiesUtils {private static final String TAG = "MainActivity";private static HashMap<String, String> keyValMap;private static void loadSystemProperties() {if (keyValMap == null) {keyValMap = new HashMap<>(30);}try {Process p = Runtime.getRuntime().exec("getprop");p.waitFor();BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));String temp = "";int keyStart, keyStop, valStart, valStop;String key, val;while ((temp = stdInput.readLine()) != null) {//[sys.ylog.svc.ftrace]: [stopped]if (!TextUtils.isEmpty(temp)) {keyStart = temp.indexOf("[") + 1;keyStop = temp.indexOf("]");valStart = temp.lastIndexOf("[") + 1;valStop = temp.lastIndexOf("]");key = temp.substring(keyStart, keyStop);val = temp.substring(valStart, valStop);keyValMap.put(key, val);Log.d("HHH", "key=" + key + " val=" + val);}}} catch (InterruptedException e) {} catch (IOException e) {}}public static String get(String key, String def) {if (keyValMap == null) {loadSystemProperties();}String ret = keyValMap.get(key);return ret == null ? def : ret;}public static int getInt(String key, int def) {if (keyValMap == null) {loadSystemProperties();}String ret = keyValMap.get(key);if (isNumeric(ret)) {return Integer.valueOf(ret);} else {return def;}}public static boolean isNumeric(String str) {Pattern pattern = Pattern.compile("[0-9]*");Matcher isNum = pattern.matcher(str);if (!isNum.matches()) {return false;}return true;}public static boolean getBoolean(String key, boolean def) {if (keyValMap == null) {loadSystemProperties();}String ret = keyValMap.get(key);return ret.equals("true");} }

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