获取Android各类系统相关信息的接口实现代码

/**
   *  获取系统中所有安装包信息
   */
	public String getAllPackages(Context context)
	{
		String appList = "";
		List packages = context.getPackageManager().getInstalledPackages(0);
		for (PackageInfo packageInfo : packages) 
		{
			// 这里可以控制是否需要获取系统级别的package
			if ((packageInfo.applicationInfo.flags &  ApplicationInfo.FLAG_SYSTEM) == 0)
			{
				appList += packageInfo.applicationInfo.loadLabel(getPackageManager()).toString() + ",";
			}
		}
		
		return appList.substring(0, appList.length()-1);
	}
	
	/**
	   *  获取系统内存信息
	   */
	public String getSysMemoryInfo(Context context)
	{

		long freeMem = 0;
		long totalMem = 0;
		
		ActivityManager activityManager = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
		MemoryInfo memoryInfo = new MemoryInfo();
		activityManager.getMemoryInfo(memoryInfo);
		
		freeMem = memoryInfo.availMem/1024/1024;
		
		//读取指定文件信息
		 String path = "/proc/meminfo";
	        String content = null;
	        BufferedReader br = null;
	        try {
	            br = new BufferedReader(new FileReader(path), 8);
	            String line;
	            if ((line = br.readLine()) != null) {
	                content = line;
	            }
	        } catch (FileNotFoundException e) {
	            e.printStackTrace();
	        } catch (IOException e) {
	            e.printStackTrace();
	        } finally {
	            if (br != null) {
	                try {
	                    br.close();
	                } catch (IOException e) {
	                    e.printStackTrace();
	                }
	            }
	        }
	        // beginIndex
	        int begin = content.indexOf(':');
	        // endIndex
	        int end = content.indexOf('k');
	        // 截取字符串信息

		content = content.substring(begin + 1, end).trim();
	    totalMem = Integer.parseInt(content)/1024;
	    

		
		return freeMem+" "+totalMem;
	}
	
	
	/**
	 * 获取CPU信息
	 */
    private String getCpuInfo() {  
             String str1 = "/proc/cpuinfo";  
            String str2 = "";  
              String cpuInfo="";  //1-cpu型号  //2-cpu频率  
              String[] arrayOfString;  
              try {  
                 FileReader fr = new FileReader(str1);  
                 BufferedReader localBufferedReader = new BufferedReader(fr, 8192);  
                 str2 = localBufferedReader.readLine();  
                 arrayOfString = str2.split("\\s+");  
                 for (int i = 2; i < arrayOfString.length; i++) {  
                	 cpuInfo =  arrayOfString[i] + "  ";  
                 }  
                 str2 = localBufferedReader.readLine();  
                arrayOfString = str2.split("\\s+");  
                cpuInfo =cpuInfo + arrayOfString[2];  
                 localBufferedReader.close();  
             } catch (IOException e) {  
             }  
             return cpuInfo;  
         }  
    
	/**
	 * 获取MAC地址 
	 */
       private String getMacAddress(){  
                String result = "";  
    	        WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);  
                 WifiInfo wifiInfo = wifiManager.getConnectionInfo();  
    	         result = wifiInfo.getMacAddress();  
    	         // Log.i(TAG, "macAdd:" + result);  
    	          return result;  
    	    }  
       
   	/**
   	 * 获取其他手机信息 
   	 */
       private String getInfo() {  
    	          TelephonyManager mTm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);  
    	           String imei = mTm.getDeviceId();  
    	            String imsi = mTm.getSubscriberId();  
    	           String mtype = android.os.Build.MODEL; // 手机型号  
    	             String numer = mTm.getLine1Number(); // 手机号码
    	             
    	             return imei + " " + imsi + " " + mtype + " " + numer;
    	        }  
       
      	/**
      	 * 获取屏幕的分辨率
      	 */
       private String getWeithAndHeight(){  
    	           //这种方式在service中无法使用，  
    	          DisplayMetrics dm = new DisplayMetrics();  
    	          getWindowManager().getDefaultDisplay().getMetrics(dm);  
    	          int width = dm.widthPixels;              //宽  
    	          int height = dm.heightPixels;           //高  
    	      
    	          //在service中也能得到高和宽  
    	         WindowManager mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);  
    	          int width0 = mWindowManager.getDefaultDisplay().getWidth();  
    	          int height0 = mWindowManager.getDefaultDisplay().getHeight();  
    	          
    	          return ""+width +" "+height + " " +width0 + " " +height0;
    	        }