Android设备基础信息获取 源码修改方式 APK开辟
APK 获取设备信息头文件
import java.io.BufferedReader;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;获取设备型号
public static String getDeviceModel() {
return Build.MODEL;
}获取设备制造商
public static String getManufacturer() {
return Build.MANUFACTURER;
}获取Android版本号
public static String getAndroidVersion() {
return Build.VERSION.RELEASE;
}获取SDK版本信息
public static int getDeviceSDK(){
return android.os.Build.VERSION.SDK_INT;
}获取当前设备安全补丁级别日期
public static String getSecurityPatchLevel() {
return Build.VERSION.SECURITY_PATCH;
}获取设备制造商
public static String getDeviceMANUFACTURER() {
return Build.SOC_MANUFACTURER;
}获取构建的内部版本
内部版本Build ID在rb-a3568/build/make/core/build_id.mk 目次下
public static String getBuildID() {
return Build.ID;
}获取显示信息
public static String getDisplay() {
return Build.DISPLAY;
}获取设备硬件名
public static String getHardware() {
return Build.HARDWARE;
}获取设备CPU架构
public static String getCpuArchitecture() {
return Build.CPU_ABI;
}获取CPU名称
通过读取Linux文件的情势获取
public static String getCpuName() {
String str1 = "/proc/cpuinfo";
String str2 = "";
String cpuName = "";
try {
FileReader fileReader = new FileReader(str1);
BufferedReader bufferedReader = new BufferedReader(fileReader);
while ((str2 = bufferedReader.readLine()) != null) {
// 为空跳过
if (TextUtils.isEmpty(str2)) {
continue;
}
// 进行 分割 对比
// 使用split(":\\s+", 2)方法将字符串str2按冒号和后续空格分割成最多两部分。例如，"Hardware: Intel Core i7"会被分成["Hardware", "Intel Core i7"]。
String[] arrayOfString = str2.split(":\\s+", 2);
if (TextUtils.equals(arrayOfString.trim(), "Hardware")) {
cpuName = arrayOfString;
break;
}
}
bufferedReader.close();
fileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
return cpuName;
}获取CPU核数
public static String getCpuCores() {
return Build.CPU_ABI;
}获取CPU频率
public static final int DEVICEINFO_UNKNOWN = -1;
/**
* Method for reading the clock speed of a CPU core on the device. Will read from either
* {@code /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq} or {@code /proc/cpuinfo}.
*
* @return Clock speed of a core on the device, or -1 in the event of an error.
* 获取 CPU 频率
*/
public static ArrayList<Integer> getCPUFreqMHzs() {
int maxFreq = DEVICEINFO_UNKNOWN;
int curFreq = 0;
ArrayList<Integer> arrayList = new ArrayList<Integer>();
try {
int coreNum = getNumberOfCPUCores();
for (int i = 0; i < coreNum; i++) {
String filename =
"/sys/devices/system/cpu/cpu" + i + "/cpufreq/cpuinfo_max_freq";
File cpuInfoMaxFreqFile = new File(filename);
if (cpuInfoMaxFreqFile.exists() && cpuInfoMaxFreqFile.canRead()) {
byte[] buffer = new byte;
FileInputStream stream = new FileInputStream(cpuInfoMaxFreqFile);
try {
stream.read(buffer);
int endIndex = 0;
// Trim the first number out of the byte buffer.
while (Character.isDigit(buffer) && endIndex < buffer.length) {
endIndex++;
}
String str = new String(buffer, 0, endIndex);
// 频率是按照1000计算
curFreq = Integer.parseInt(str) / 1000;
arrayList.add(curFreq);
} catch (NumberFormatException e) {
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
stream.close();
}
}
}
if (maxFreq == DEVICEINFO_UNKNOWN && arrayList.size() == 0) {
FileInputStream stream = new FileInputStream("/proc/cpuinfo");
try {
int freqBound = parseFileForValue("cpu MHz", stream);
curFreq = freqBound;
arrayList.add(curFreq);
} finally {
stream.close();
}
}
} catch (IOException e) {
}
return arrayList;
}
/**
* Reads the number of CPU cores from the first available information from
* {@code /sys/devices/system/cpu/possible}, {@code /sys/devices/system/cpu/present},
* then {@code /sys/devices/system/cpu/}.
*
* @return Number of CPU cores in the phone, or DEVICEINFO_UKNOWN = -1 in the event of an error.
*/
public static int getNumberOfCPUCores() {
int coreNumber = -1;
if (coreNumber != DEVICEINFO_UNKNOWN) {
return coreNumber;
}
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.GINGERBREAD_MR1) {
// Gingerbread doesn't support giving a single application access to both cores, but a
// handful of devices (Atrix 4G and Droid X2 for example) were released with a dual-core
// chipset and Gingerbread; that can let an app in the background run without impacting
// the foreground application. But for our purposes, it makes them single core.
coreNumber = 1;
return coreNumber;
}
int cores;
try {
cores = getCoresFromFileInfo("/sys/devices/system/cpu/present");
if (cores == DEVICEINFO_UNKNOWN) {
cores = new File("/sys/devices/system/cpu/").listFiles(CPU_FILTER).length;;
}
} catch (SecurityException e) {
cores = DEVICEINFO_UNKNOWN;
} catch (NullPointerException e) {
cores = DEVICEINFO_UNKNOWN;
}
coreNumber = cores;
return coreNumber;
}
/**
* Tries to read file contents from the file location to determine the number of cores on device.
* @param fileLocation The location of the file with CPU information
* @return Number of CPU cores in the phone, or DEVICEINFO_UKNOWN = -1 in the event of an error.
*/
private static int getCoresFromFileInfo(String fileLocation) {
InputStream is = null;
try {
is = new FileInputStream(fileLocation);
BufferedReader buf = new BufferedReader(new InputStreamReader(is));
String fileContents = buf.readLine();
buf.close();
return getCoresFromFileString(fileContents);
} catch (IOException e) {
return DEVICEINFO_UNKNOWN;
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
// Do nothing.
}
}
}
}
/**
* Converts from a CPU core information format to number of cores.
* @param str The CPU core information string, in the format of "0-N"
* @return The number of cores represented by this string
*/
private static int getCoresFromFileString(String str) {
if (str == null || !str.matches("0-[\\d]+$")) {
return DEVICEINFO_UNKNOWN;
}
return Integer.valueOf(str.substring(2)) + 1;
}
private static final FileFilter CPU_FILTER = new FileFilter() {
@Override
public boolean accept(File pathname) {
String path = pathname.getName();
//regex is slow, so checking char by char.
if (path.startsWith("cpu")) {
for (int i = 3; i < path.length(); i++) {
if (!Character.isDigit(path.charAt(i))) {
return false;
}
}
return true;
}
return false;
}
};
/**
* Helper method for reading values from system files, using a minimised buffer.
*
* @param textToMatch - Text in the system files to read for.
* @param stream - FileInputStream of the system file being read from.
* @return A numerical value following textToMatch in specified the system file.
* -1 in the event of a failure.
*/
private static int parseFileForValue(String textToMatch, FileInputStream stream) {
byte[] buffer = new byte;
try {
int length = stream.read(buffer);
for (int i = 0; i < length; i++) {
if (buffer == '\n' || i == 0) {
if (buffer == '\n') i++;
for (int j = i; j < length; j++) {
int textIndex = j - i;
//Text doesn't match query at some point.
if (buffer != textToMatch.charAt(textIndex)) {
break;
}
//Text matches query here.
if (textIndex == textToMatch.length() - 1) {
return extractValue(buffer, j);
}
}
}
}
} catch (IOException e) {
//Ignore any exceptions and fall through to return unknown value.
} catch (NumberFormatException e) {
}
return DEVICEINFO_UNKNOWN;
}
/**
* Helper method used by {@link #parseFileForValue(String, FileInputStream) parseFileForValue}. Parses
* the next available number after the match in the file being read and returns it as an integer.
* @param index - The index in the buffer array to begin looking.
* @return The next number on that line in the buffer, returned as an int. Returns
* DEVICEINFO_UNKNOWN = -1 in the event that no more numbers exist on the same line.
*/
private static int extractValue(byte[] buffer, int index) {
while (index < buffer.length && buffer != '\n') {
if (Character.isDigit(buffer)) {
int start = index;
index++;
while (index < buffer.length && Character.isDigit(buffer)) {
index++;
}
String str = new String(buffer, 0, start, index - start);
return Integer.parseInt(str);
}
index++;
}
return DEVICEINFO_UNKNOWN;
}设备信息源码位置修改
build\make\core\sysprop.mk
https://img2024.cnblogs.com/blog/3153674/202502/3153674-20250213201634780-625697027.png
https://img2024.cnblogs.com/blog/3153674/202502/3153674-20250213201714519-445812085.png
[*]搜刮到数据很多，根据当前使用的Rockchip 3568的芯片，找到 3568对应的文件夹下的 device/rockchip/rk356x/rk3568_t/rk3568_t.mk
https://img2024.cnblogs.com/blog/3153674/202502/3153674-20250213201729542-236633477.png
[*]根据需求修改相应的参数
https://img2024.cnblogs.com/blog/3153674/202502/3153674-20250213201747739-1580677205.png
参考资料
android利用StorageStatsManager获取应用程序的存储信息
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