获取系统内存大小

  1. //获取系统总内存   
  2.  private String getTotalMemory() {
  3.         String str1 = "/proc/meminfo";// 系统内存信息文件
  4.         String str2;
  5.         String[] arrayOfString;
  6.         long initial_memory = 0;
  7.         try {
  8.             FileReader localFileReader = new FileReader(str1);
  9.             BufferedReader localBufferedReader = new BufferedReader(
  10.                     localFileReader, 8192);
  11.             str2 = localBufferedReader.readLine();// 读取meminfo第一行，系统总内存大小
  12.             arrayOfString = str2.split("\\s+");
  13.             for (String num : arrayOfString) {
  14.                 Log.i(str2, num + "\t");
  15.             }
  16.             initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;// 获得系统总内存，单位是KB，乘以1024转换为Byte
  17.             localBufferedReader.close();
  18.         } catch (IOException e) {
  19.         }
  20.         return Formatter.formatFileSize(getBaseContext(), initial_memory);// Byte转换为KB或者MB，内存大小规格化
  21.     }
  22.  /**
  23.      *  获取android当前可用内存大小
  24.      * @return
  25.      */
  26.     private String getAvailMemory() {// 获取android当前可用内存大小
  27.         ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
  28.         ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
  29.         am.getMemoryInfo(mi);
  30. //mi.availMem; 当前系统的可用内存
  31.         return Formatter.formatFileSize(getBaseContext(), mi.availMem);// 将获取的内存大小规格化
  32.     }
  33. /**
  34. *获取sdcard是否挂载与sdcard总空间和可用空间
  35. **/
  36. private  void Memory(){
  37.         //查看ssdcard是否挂载
  38.     if(!Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)){
  39.         //sdcard状态是没有挂载的情况
  40.         Toast.makeText(USBCameraActivity.this, "sdcard不存在或未挂载", Toast.LENGTH_SHORT).show();
  41.         return ;
  42.     }
  43.     File sdcard_filedir = Environment.getExternalStorageDirectory();//得到sdcard的目录作为一个文件对象
  44.     long usableSpace = sdcard_filedir.getUsableSpace();//获取文件目录对象剩余空间
  45.     long totalSpace = sdcard_filedir.getTotalSpace();
  46.     //将一个long类型的文件大小格式化成用户可以看懂的M，G字符串
  47.     String usableSpace_str = Formatter.formatFileSize(USBCameraActivity.this, usableSpace);     //SDcard可用空间
  48.     String totalSpace_str = Formatter.formatFileSize(USBCameraActivity.this, totalSpace);       //SDcard总空间
  49.     long MAX_memory=4096;
  50.     System.out.println("AAA usableSpacestr = "+usableSpace_str+" totalSpace_str = " + totalSpace_str);
  51.     if(usableSpace < 1024 * 1024 * MAX_memory){//判断剩余空间是否小于MAX_memory M
  52.         Toast.makeText(USBCameraActivity.this, "sdcard剩余空间不足,无法满足下载；剩余空间为："+usableSpace_str, Toast.LENGTH_SHORT).show();
  53.         return ;
  54.     }
  55. }

崩溃重启

Android - 图1

Step 1. Add it in your root build.gradle at the end of repositories:

  1. allprojects {
  2.         repositories {
  3.             ...
  4.             maven { url 'https://jitpack.io' }
  5.         }
  6.     }

Step 2. Add the dependency

  1. dependencies {
  2.             compile 'com.github.nanchen2251:AppManager:1.0.1'
  3.     }

Android - 图2

  1. // 设置崩溃后自动重启 APP
  2. UncaughtExceptionHandlerImpl.getInstance().init(this, BuildConfig.DEBUG, true, 0, MainActivity.class);

Android - 图3

  1. // 禁止重启
  2. UncaughtExceptionHandlerImpl.getInstance().init(this,BuildConfig.DEBUG);