Android获取系统信息工具类

import android.app.ActivityManager;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.graphics.drawable.Drawable;
import android.os.Environment;
import android.os.StatFs;
import android.provider.Settings;
import android.text.format.Formatter;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.UUID;

/**
* Created by OrandNot on 2016/7/21.
*/
public class SystemInfoUtils {

/**
* 获取设备唯一id 方法一
* bug:在主流厂商生产的设备上，有一个很经常的bug，就是每个设备都会产生相同的ANDROID_ID
* 需要READ_PHONE_STATE权限
* 当设备被wipe后该数改变
* @param context
* @return
*/
public static String getDeviceId(Context context) {
return Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
}

/**
* 获取设备唯一id 方法二
* 安装后的唯一ID（即Installtion ID）
* @param context
* @return
*/
private static String sID = null;
private static final String INSTALLATION = "INSTALLATION";
public synchronized static String getInstallationId(Context context) {
if (sID == null) {
File installation = new File(context.getFilesDir(), INSTALLATION);
try {
if (!installation.exists())
writeInstallationFile(installation);
sID = readInstallationFile(installation);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
return sID;
}

private static String readInstallationFile(File installation) throws IOException {
RandomAccessFile f = new RandomAccessFile(installation, "r");
byte[] bytes = new byte[(int) f.length()];
f.readFully(bytes);
f.close();
return new String(bytes);
}

private static void writeInstallationFile(File installation) throws IOException {
FileOutputStream out = new FileOutputStream(installation);
String id = UUID.randomUUID().toString();
out.write(id.getBytes());
out.close();
}

/**
* 得到当前系统内运行的app进程数量
* @param context
* @return
*/
public static int getRunningAppProcesses(Context context) {

ActivityManager am = (ActivityManager) context

.getSystemService(Context.ACTIVITY_SERVICE);

List<ActivityManager.RunningAppProcessInfo> appInfos = am.getRunningAppProcesses();

return appInfos.size();

}

/**
* 得到非系统应用的app信息
* @param context
* @return
*/
public static List<HashMap<String, Object>> getAppInfo(Context context) {
List<HashMap<String, Object>> appInfos = new ArrayList<HashMap<String, Object>>();
HashMap<String, Object> map = null;
List<PackageInfo> packages = context.getPackageManager()
.getInstalledPackages(0);// 参数传入0表示过滤权限，因为可能有的手机不让你获取应用信息
for (PackageInfo temp : packages) {
if ((temp.applicationInfo.flags & temp.applicationInfo.FLAG_SYSTEM) == 0) {// 非系统应用
String appName = temp.applicationInfo.loadLabel(
context.getPackageManager()).toString();//得到应用的名称
Drawable appIcon = temp.applicationInfo.loadIcon(context
.getPackageManager());// 得到应用图标
long lastUpdateTime = temp.lastUpdateTime;// 得到应用最后一次更新的时间
String packageName = temp.packageName;// 得到应用的包名
String versionName = temp.versionName;// 得到应用的版本信息
map = new HashMap<String, Object>();
map.put("appName", appName);
map.put("appIcon", appIcon);
map.put("lastUpdateTime", lastUpdateTime);
map.put("packageName", packageName);
map.put("versionName", versionName);
appInfos.add(map);// 把应用信息加入集合中返回
map = null;
} else {
// 系统应用
}
}
return appInfos;
}

/**
* 获取sd卡容量
* @param context
* @return
*/
public static String getSdSize(Context context) {
String totalStr = null, availStr = null;
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {// 判断是否检测到sd卡
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
long blockSize = stat.getBlockSizeLong();
long availableBlocks = stat.getAvailableBlocksLong();
long totalBlocks = stat.getBlockCountLong();
long totalSize = blockSize * totalBlocks;
long availSize = blockSize * availableBlocks;
totalStr = Formatter.formatFileSize(context, totalSize);
availStr = Formatter.formatFileSize(context, availSize);
}else{
Toast.makeText(context, "该系统版本不支持获取sd卡容量", Toast.LENGTH_SHORT)
.show();
}
} else
Toast.makeText(context, "没有检测到SD卡，请检查是否正确插入", Toast.LENGTH_SHORT)
.show();
return "SD卡总容量为:" + totalStr + "可用为:" + availStr;
}

/**
* 获取手机内存
* @param context
* @return
*/
public static String getRomSave(Context context) {
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
String totalStr = null, availStr = null;
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());// 得到手机内存的路径
long blockSize = stat.getBlockSizeLong();
long availableBlocks = stat.getAvailableBlocksLong();
long totalBlocks = stat.getBlockCountLong();
long totalSize = blockSize * totalBlocks;
long availSize = blockSize * availableBlocks;
totalStr = Formatter.formatFileSize(context, totalSize);
availStr = Formatter.formatFileSize(context, availSize);
return "手机内存总大小为:" + totalStr + "可用空间为:" + availStr;
}else{
return "该系统版本不支持获取手机内存容量";
}
}

}