Question

我正在开发一个应用程序，我需要在其中显示总内存和可用内存。我正在使用以下代码段;但是，它仅适用于API 16或更高版本。我需要适用于所有Android版本的东西。

我的问题不同于可能的重复＆＃34;我的问题是在所有API级别上获得的内存使用率。

private void getAvailableRam() { MemoryInfo mi = new MemoryInfo(); ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE); activityManager.getMemoryInfo(mi); long availableMegs = mi.availMem / 1048576L; ttvv.setText(availableMegs + " MB"); } private void getTotalRamSize() { MemoryInfo mi = new MemoryInfo(); ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE); activityManager.getMemoryInfo(mi); long totalMemory = mi.totalMem / 1048576L; ttvv2.setText(totalMemory + " MB"); }

Answer 1

文件“/ proc / meminfo”是实时内存信息。你可以在你的代码中阅读它

adb shell cat /proc/meminfo

MemTotal:        1900556 kB
MemFree:          343468 kB
Buffers:           97708 kB
Cached:           659364 kB
SwapCached:            0 kB
Active:           784552 kB
Inactive:         358336 kB
Active(anon):     394596 kB
Inactive(anon):      364 kB
Active(file):     389956 kB
Inactive(file):   357972 kB
Unevictable:        1396 kB
Mlocked:               0 kB
HighTotal:       1158144 kB
HighFree:          52088 kB
LowTotal:         742412 kB
LowFree:          291380 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:        394552 kB
Mapped:           176752 kB
Shmem:               452 kB
Slab:              48296 kB
SReclaimable:      21808 kB
SUnreclaim:        26488 kB
KernelStack:        9632 kB
PageTables:        19276 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:      950276 kB
Committed_AS:   47222076 kB
VmallocTotal:     245760 kB
VmallocUsed:       79036 kB
VmallocChunk:      75648 kB

Answer 2

获取可用内存

您可以使用相同的mi.availMem，因为min API级别为1

使总内存低于API级别16

试试这个

public class MainActivity extends AppCompatActivity {

TextView ttvv2;

protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      ttvv2 = (TextView) findViewById(R.id.ttvv2);
      ttvv2.setText(getTotalRAM());
 }

private  String getTotalRAM() {
      RandomAccessFile reader = null;
      String load = null;
      long total = 0;
      try {
           reader = new RandomAccessFile("/proc/meminfo", "r");
           load = reader.readLine().replaceAll("\\D+","");;
           total = Integer.parseInt(load)/1024;
      }catch (IOException ex) {
           ex.printStackTrace();
      }
      return total+" MB";
}
}

希望这会有所帮助。问候。

来源：

1）http://developer.android.com/reference/android/app/ActivityManager.MemoryInfo.html

2）Android How do you get total memory RAM in the device?

Android上的总内存和可用内存？

2 个答案: