android - 如何获取我的 android 设备的内存使用情况

Question

你的 friend 们过得怎么样，希望最好。 friend 们，我想知道我的 Android 设备有多少内存以及使用了多少内存 Activity 内存、非 Activity 内存、空闲内存和有线内存(以 MB 为单位) 我已经通过 this link 通过解析“/system/bin/cat”、“/proc/meminfo”我们可以得到我上面提到的东西，是的我得到了所有的东西但是我得到了一个长字符串我什么都有

 MemTotal:         377192 kB
  MemFree:           10448 kB
  Buffers:            1368 kB``
  Cached:            74276 kB
  SwapCached:            0 kB
  Active:           143116 kB
  Inactive:         177292 kB
  Active(anon):     118388 kB
  Inactive(anon):   137664 kB
  Active(file):      24728 kB
  Inactive(file):    39628 kB
    Unevictable:       10664 kB
    Mlocked:           10372 kB
    HighTotal:        190464 kB
    HighFree:            568 kB
    LowTotal:         186728 kB
    LowFree:            9880 kB
    SwapTotal:             0 kB
    SwapFree:              0 kB
Dirty:                 8 kB
Writeback:             0 kB
AnonPages:        255440 kB
Mapped:            45816 kB
Shmem:               624 kB
Slab:              10952 kB
SReclaimable:       2456 kB
SUnreclaim:         8496 kB

这是我从中得到的更大的字符串

 private String ReadCPUinfo()
{
ProcessBuilder cmd;
StringBuffer strMemory = new StringBuffer();
//final ActivityManager activityManager =(ActivityManager) 
context.getSystemService(Context.ACTIVITY_SERVICE);
ActivityManager actvityManager = (ActivityManager) this.getSystemService(  
ACTIVITY_SERVICE );
ActivityManager.MemoryInfo mInfo = new ActivityManager.MemoryInfo ();
actvityManager.getMemoryInfo( mInfo );
strMemory.append("Available Memory : ");
strMemory.append(mInfo.availMem/1048576L);
strMemory.append("\n");
strMemory.append("\n");
String result=strMemory.toString();
try{
String[] args = {"/system/bin/cat", "/proc/meminfo"};
cmd = new ProcessBuilder(args);
Process process = cmd.start();
InputStream in = process.getInputStream();
byte[] re = new byte[1024];
while(in.read(re) != -1){
System.out.println("itthhe   ====  ---   >>>>    "+new String(re));
result = result + new String(re);
}
in.close();
} catch(IOException ex){
ex.printStackTrace();
}
return result;
}

我想知道我是否可以为 diff 动态地打破这个字符串。设备或者有没有其他方法可以找到以上内容

我也经历过 this 但它也没有完全使用..我很容易获得可用的内存信息但我需要所有四个

非常感谢任何帮助 提前致谢

Answer 1

ActivityManager activityManager = (ActivityManager) context.getSystemService(ACTIVITY_SERVICE);
MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
activityManager.getMemoryInfo(memoryInfo);

Log.i(TAG, " memoryInfo.availMem " + memoryInfo.availMem + "\n" );
Log.i(TAG, " memoryInfo.lowMemory " + memoryInfo.lowMemory + "\n" );
Log.i(TAG, " memoryInfo.threshold " + memoryInfo.threshold + "\n" );

List<RunningAppProcessInfo> runningAppProcesses = activityManager.getRunningAppProcesses();

Map<Integer, String> pidMap = new TreeMap<Integer, String>();
for (RunningAppProcessInfo runningAppProcessInfo : runningAppProcesses)
{
    pidMap.put(runningAppProcessInfo.pid, runningAppProcessInfo.processName);
}

Collection<Integer> keys = pidMap.keySet();

for(int key : keys)
{
    int pids[] = new int[1];
    pids[0] = key;
    android.os.Debug.MemoryInfo[] memoryInfoArray = activityManager.getProcessMemoryInfo(pids);
    for(android.os.Debug.MemoryInfo pidMemoryInfo: memoryInfoArray)
    {
        Log.i(TAG, String.format("** MEMINFO in pid %d [%s] **\n",pids[0],pidMap.get(pids[0])));
        Log.i(TAG, " pidMemoryInfo.getTotalPrivateDirty(): " + pidMemoryInfo.getTotalPrivateDirty() + "\n");
        Log.i(TAG, " pidMemoryInfo.getTotalPss(): " + pidMemoryInfo.getTotalPss() + "\n");
        Log.i(TAG, " pidMemoryInfo.getTotalSharedDirty(): " + pidMemoryInfo.getTotalSharedDirty() + "\n");
    }
}

参见 How do I discover memory usage of my application in Android?

这就是你所需要的;)