75.android 简单的获取当前可用运行内存，总运行内存，获取包含系统软件在内的所有内存，获取系统参数显示的内存大小。

//第一步写个SystemMemory类来获取当前可用运行内存和总运行内存：

public class SystemMemory {/***   * 获取android当前可用运行内存大小*   * @param context*   **/public static String getAvailMemory(Context context) {ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();am.getMemoryInfo(mi);
// mi.availMem; 当前系统的可用内存return Formatter.formatFileSize(context, mi.availMem);// 将获取的内存大小规格化}/***   * 获取android总运行内存大小*   * @param context*   **/public static String getTotalMemory(Context context) {String str1 = "/proc/meminfo";// 系统内存信息文件String str2;String[] arrayOfString;long initial_memory = 0;try {FileReader localFileReader = new FileReader(str1);BufferedReader localBufferedReader = new BufferedReader(localFileReader, 8192);str2 = localBufferedReader.readLine();// 读取meminfo第一行，系统总内存大小arrayOfString = str2.split("\\s+");for (String num : arrayOfString) {Log.i(str2, num + "\t");}// 获得系统总内存，单位是KBint i = Integer.valueOf(arrayOfString[1]).intValue();//int值乘以1024转换为long类型initial_memory = new Long((long)i*1024);localBufferedReader.close();} catch (IOException e) {}return Formatter.formatFileSize(context, initial_memory);// Byte转换为KB或者MB，内存大小规格化}
}

//第二步直接在Activity里调用就行了：

mText = (TextView) findViewById(R.id.mText);
//当前可用运行内存
String availMemory = SystemMemory.getAvailMemory(this);
//当前总运行内存
String totalMemory = SystemMemory.getTotalMemory(this);
mText.setText("当前可用运行内存"+availMemory+","+"当前总运行内存"+totalMemory);

//我的Activity布局就写了个TextView:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="com.example.hasee.zhulixiaodian.view.toolclass.MainActivity"><TextViewandroid:id="@+id/mText"android:layout_width="match_parent"android:layout_height="wrap_content" /></android.support.constraint.ConstraintLayout>

//然后以上获取到的是除了系统占用的部分，现在想要获取包含系统软件在内的所有内存，也就是系统参数显示的内存大小，例如4g+64g,8g+128g等信息，如下：

//小米手机系统日志内容：

//小米手机系统日志里的信息：

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[ro.apex.updatable]: [true]
[ro.baseband]: [msm]
[ro.bionic.2nd_arch]: [arm]
[ro.bionic.2nd_cpu_variant]: [cortex-a73]
[ro.bionic.arch]: [arm64]
[ro.bionic.cpu_variant]: [kryo300]
[ro.bluetooth.a2dp_offload.supported]: [true]
[ro.bluetooth.library_name]: [libbluetooth_qti.so]
[ro.board.platform]: [bengal]
[ro.boot.avb_version]: [1.1]
[ro.boot.baseband]: [msm]
[ro.boot.boot_devices]: [soc/4804000.ufshc]
[ro.boot.bootdevice]: [4804000.ufshc]
[ro.boot.bootreason]: [reboot,]
[ro.boot.console]: [ttyMSM0]
[ro.boot.cpuid]: [0xd8cbf533]
[ro.boot.dp]: [0x0]
[ro.boot.dtb_idx]: [4]
[ro.boot.dtbo_idx]: [16]
[ro.boot.dynamic_partitions]: [true]
[ro.boot.efuse]: [1]
[ro.boot.flash.locked]: [1]
[ro.boot.hardware]: [qcom]
[ro.boot.hwc]: [CN]
[ro.boot.hwlevel]: [MP]
[ro.boot.hwversion]: [2880.9.0]
[ro.boot.keymaster]: [1]
[ro.boot.memcg]: [1]
[ro.boot.product.hardware.sku]: [lime]
[ro.boot.secureboot]: [1]
[ro.boot.serialno]: [3181b78b0521]
[ro.boot.vbmeta.avb_version]: [1.0]
[ro.boot.vbmeta.device_state]: [locked]
[ro.boot.vbmeta.digest]: [83c405abd39b4aa4ee4b5cb6f95f50b358cc472e7cefac02f4a4a723a72c6816]
[ro.boot.vbmeta.hash_alg]: [sha256]
[ro.boot.vbmeta.invalidate_on_error]: [yes]
[ro.boot.vbmeta.size]: [6976]
[ro.boot.verifiedbootstate]: [green]
[ro.boot.veritymode]: [enforcing]
[ro.bootimage.build.date]: [Mon Nov 29 14:46:16 CST 2021]
[ro.bootimage.build.date.utc]: [1638168376]
[ro.bootimage.build.fingerprint]: [Redmi/lime/lime:10/QKQ1.200830.002/V12.21.11.29.EP.WOSQ.J19S:user/release-keys]
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[ro.boottime.tombstoned]: [7875016349]
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[ro.boottime.vendor.adsprpcd_audiopd]: [7518127755]
[ro.boottime.vendor.atfwd]: [7869303797]
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[ro.boottime.vendor.audio-hal-2-0]: [4936678225]
[ro.boottime.vendor.bluetooth-1-0-qti]: [4957443017]
[ro.boottime.vendor.camera-provider-2-4]: [4960897861]
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[ro.boottime.vendor.cnd]: [7224170360]
[ro.boottime.vendor.cnss_diag]: [6791700308]
[ro.boottime.vendor.configstore-hal]: [4969451246]
[ro.boottime.vendor.dataadpl]: [8435407599]
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[ro.boottime.vendor.light-hal-2-0]: [5011222288]
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[ro.boottime.vendor.startpktlog]: [43391633575]
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[ro.boottime.wifidisplayhalservice]: [7227578641]
[ro.boottime.wpa_supplicant]: [14406309003]
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[ro.com.google.clientidbase]: [android-xiaomi]
[ro.config.alarm_alert]: [Alarm_Classic.ogg]
[ro.config.elder-ringtone]: [Angel.mp3]
[ro.config.media_vol_default]: [10]
[ro.config.notification_sound]: [pixiedust.ogg]
[ro.config.ringtone]: [Ring_Synth_04.ogg]
[ro.config.sms_delivered_sound]: [MessageComplete.ogg]
[ro.config.sms_received_sound]: [FadeIn.ogg]
[ro.config.vc_call_vol_steps]: [11]
[ro.control_privapp_permissions]: [enforce]
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[ro.crypto.type]: [file]
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[ro.hardware.egl]: [adreno]
[ro.hardware.fp.sideCap]: [true]
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[ro.miui.enterprise.licence]: [poah03jxnk0z08rs]
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[ro.miui.has_cust_partition]: [true]
[ro.miui.has_handy_mode_sf]: [1]
[ro.miui.has_real_blur]: [1]
[ro.miui.has_security_keyboard]: [1]
[ro.miui.notch]: [1]
[ro.miui.pm.movedtodata.apps]: [com.google.android.apps.photos,com.google.android.apps.docs,com.google.android.music,com.google.android.videos,com.google.android.apps.tachyon]
[ro.miui.remove_uri_80_flag]: [1]
[ro.miui.restrict_imei]: [1]
[ro.miui.support_miui_ime_bottom]: [1]
[ro.miui.ui.font.theme_apply]: [true]
[ro.miui.ui.fonttype]: [mipro]
[ro.miui.ui.version.code]: [10]
[ro.miui.ui.version.name]: [V12]
[ro.miui.version.code_time]: [1638115200]
[ro.netflix.bsp_rev]: [Q6115-31409-1]
[ro.nfc.port]: [I2C]
[ro.odm.build.date]: [Mon Nov 29 14:46:16 CST 2021]
[ro.odm.build.date.utc]: [1638168376]
[ro.odm.build.fingerprint]: [Redmi/lime/lime:10/QKQ1.200830.002/V12.21.11.29.EP.WOSQ.J19S:user/release-keys]
[ro.odm.build.id]: [QKQ1.200830.002]
[ro.odm.build.tags]: [release-keys]
[ro.odm.build.type]: [user]
[ro.odm.build.version.incremental]: [V12.21.11.29.EP.WOSQ.J19S]
[ro.odm.build.version.release]: [10]
[ro.odm.build.version.sdk]: [29]
[ro.odm.product.cpu.abilist]: [arm64-v8a,armeabi-v7a,armeabi]
[ro.odm.product.cpu.abilist32]: [armeabi-v7a,armeabi]
[ro.odm.product.cpu.abilist64]: [arm64-v8a]
[ro.oem_unlock_supported]: [1]
[ro.opengles.version]: [196610]
[ro.persistent_properties.ready]: [true]
[ro.postinstall.fstab.prefix]: [/system]
[ro.product.board]: [lime]
[ro.product.brand]: [Redmi]
[ro.product.build.date]: [Mon Nov 29 13:19:14 CST 2021]
[ro.product.build.date.utc]: [1638163154]
[ro.product.build.fingerprint]: [qti/qssi/qssi:10/QKQ1.200830.002/V12.21.11.29.EP.WOSQ.J19S:user/release-keys]
[ro.product.build.id]: [QKQ1.200830.002]
[ro.product.build.tags]: [release-keys]
[ro.product.build.type]: [user]
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[ro.product.build.version.release]: [10]
[ro.product.build.version.sdk]: [29]
[ro.product.cert]: [M2010J19SC]
[ro.product.cpu.abi]: [arm64-v8a]
[ro.product.cpu.abilist]: [arm64-v8a,armeabi-v7a,armeabi]
[ro.product.cpu.abilist32]: [armeabi-v7a,armeabi]
[ro.product.cpu.abilist64]: [arm64-v8a]
[ro.product.device]: [lime]
[ro.product.first_api_level]: [29]
[ro.product.locale]: [zh-CN]
[ro.product.manufacturer]: [Xiaomi]
[ro.product.marketname]: [Redmi Note 9 4G]
[ro.product.mod_device]: [lime_qiy]
[ro.product.model]: [M2010J19SC]
[ro.product.name]: [lime]
[ro.product.odm.brand]: [Redmi]
[ro.product.odm.device]: [lime]
[ro.product.odm.manufacturer]: [Xiaomi]
[ro.product.odm.marketname]: [Redmi Note 9 4G]
[ro.product.odm.model]: [M2010J19SC]
[ro.product.odm.name]: [lime]
[ro.product.product.brand]: [qti]
[ro.product.product.device]: [qssi]
[ro.product.product.manufacturer]: [QUALCOMM]
[ro.product.product.marketname]: []
[ro.product.product.model]: [qssi system image for arm64]
[ro.product.product.name]: [qssi]
[ro.product.property_source_order]: [odm,vendor,product,product_services,system]
[ro.product.system.brand]: [qti]
[ro.product.system.device]: [qssi]
[ro.product.system.manufacturer]: [QUALCOMM]
[ro.product.system.marketname]: []
[ro.product.system.model]: [qssi system image for arm64]
[ro.product.system.name]: [qssi]
[ro.product.vendor.brand]: [Redmi]
[ro.product.vendor.device]: [lime]
[ro.product.vendor.manufacturer]: [Xiaomi]
[ro.product.vendor.marketname]: [Redmi Note 9 4G]
[ro.product.vendor.model]: [M2010J19SC]
[ro.product.vendor.name]: [lime]
[ro.property_service.version]: [2]
[ro.qc.sdk.audio.fluencetype]: [none]
[ro.qc.sdk.audio.ssr]: [false]
[ro.revision]: [0]
[ro.ril.factory_id]: [16]
[ro.ril.miui.imei0]: [861181052207160]
[ro.ril.miui.imei1]: [861181052207178]
[ro.ril.oem.btmac]: [b894e7f7d43f]
[ro.ril.oem.imei1]: [861181052207160]
[ro.ril.oem.imei2]: [861181052207178]
[ro.ril.oem.meid]: [99001789111358]
[ro.ril.oem.psno]: [30547/S1WT00087]
[ro.ril.oem.sno]: [AC137S035373]
[ro.ril.oem.wifimac]: [b894e7f7d43e]
[ro.rom.zone]: [1]
[ro.runtime.firstboot]: [1651764850432]
[ro.secure]: [1]
[ro.secureboot.devicelock]: [1]
[ro.secureboot.lockstate]: [locked]
[ro.serialno]: [3181b78b0521]
[ro.sf.lcd_density]: [440]
[ro.surface_flinger.has_HDR_display]: [true]
[ro.surface_flinger.has_wide_color_display]: [true]
[ro.surface_flinger.protected_contents]: [true]
[ro.surface_flinger.use_color_management]: [true]
[ro.surface_flinger.wcg_composition_dataspace]: [143261696]
[ro.system.build.date]: [Mon Nov 29 13:19:14 CST 2021]
[ro.system.build.date.utc]: [1638163154]
[ro.system.build.fingerprint]: [qti/qssi/qssi:10/QKQ1.200830.002/V12.21.11.29.EP.WOSQ.J19S:user/release-keys]
[ro.system.build.id]: [QKQ1.200830.002]
[ro.system.build.tags]: [release-keys]
[ro.system.build.type]: [user]
[ro.system.build.version.incremental]: [V12.21.11.29.EP.WOSQ.J19S]
[ro.system.build.version.release]: [10]
[ro.system.build.version.sdk]: [29]
[ro.telephony.call_ring.multiple]: [false]
[ro.telephony.default_network]: [22,20]
[ro.telephony.iwlan_operation_mode]: [legacy]
[ro.treble.enabled]: [true]
[ro.vendor.alarm_boot]: [false]
[ro.vendor.all_modes.colorpick_adjust]: [true]
[ro.vendor.audio.scenario.support]: [false]
[ro.vendor.audio.sdk.fluencetype]: [none]
[ro.vendor.audio.sdk.ssr]: [false]
[ro.vendor.audio.sfx.earadj]: [true]
[ro.vendor.audio.sfx.scenario]: [false]
[ro.vendor.audio.sos]: [true]
[ro.vendor.audio.soundfx.type]: [mi]
[ro.vendor.audio.soundfx.usb]: [true]
[ro.vendor.audio.soundtrigger]: [sva]
[ro.vendor.audio.soundtrigger.appdefine.cnn.level]: [31]
[ro.vendor.audio.soundtrigger.appdefine.gmm.level]: [55]
[ro.vendor.audio.soundtrigger.appdefine.gmm.user.level]: [50]
[ro.vendor.audio.soundtrigger.appdefine.vop.level]: [10]
[ro.vendor.audio.soundtrigger.lowpower]: [true]
[ro.vendor.audio.soundtrigger.training.level]: [50]
[ro.vendor.audio.soundtrigger.xanzn.cnn.level]: [70]
[ro.vendor.audio.soundtrigger.xanzn.gmm.level]: [45]
[ro.vendor.audio.soundtrigger.xanzn.gmm.user.level]: [30]
[ro.vendor.audio.soundtrigger.xanzn.vop.level]: [10]
[ro.vendor.audio.soundtrigger.xatx.cnn.level]: [27]
[ro.vendor.audio.soundtrigger.xatx.gmm.level]: [50]
[ro.vendor.audio.soundtrigger.xatx.gmm.user.level]: [40]
[ro.vendor.audio.soundtrigger.xatx.vop.level]: [10]
[ro.vendor.audio.spk.clean]: [true]
[ro.vendor.audio.surround.support]: [false]
[ro.vendor.audio.vocal.support]: [false]
[ro.vendor.audio.voice.change.support]: [true]
[ro.vendor.audio.voice.volume.boost]: [manual]
[ro.vendor.bluetooth.wipower]: [false]
[ro.vendor.build.date]: [Mon Nov 29 14:46:16 CST 2021]
[ro.vendor.build.date.utc]: [1638168376]
[ro.vendor.build.fingerprint]: [Redmi/lime/lime:10/QKQ1.200830.002/V12.21.11.29.EP.WOSQ.J19S:user/release-keys]
[ro.vendor.build.id]: [QKQ1.200830.002]
[ro.vendor.build.security_patch]: [2021-08-01]
[ro.vendor.build.software.version]: [Android10_12]
[ro.vendor.build.tags]: [release-keys]
[ro.vendor.build.type]: [user]
[ro.vendor.build.version.incremental]: [V12.21.11.29.EP.WOSQ.J19S]
[ro.vendor.build.version.release]: [10]
[ro.vendor.build.version.sdk]: [29]
[ro.vendor.cabc.enable]: [true]
[ro.vendor.colorpick_adjust]: [true]
[ro.vendor.display.sensortype]: [2]
[ro.vendor.display.svi]: [1]
[ro.vendor.extension_library]: [libqti-perfd-client.so]
[ro.vendor.gpu.available_frequencies]: [950000000 900000000 820000000 745000000 600000000 465000000 320000000 ]
[ro.vendor.product.cpu.abilist]: [arm64-v8a,armeabi-v7a,armeabi]
[ro.vendor.product.cpu.abilist32]: [armeabi-v7a,armeabi]
[ro.vendor.product.cpu.abilist64]: [arm64-v8a]
[ro.vendor.qti.config.zram]: [true]
[ro.vendor.qti.sys.fw.bg_apps_limit]: [60]
[ro.vendor.qti.va_aosp.support]: [1]
[ro.vendor.qti.va_odm.support]: [1]
[ro.vendor.ril.mbn_copy_completed]: [1]
[ro.vendor.ril.svdo]: [false]
[ro.vendor.ril.svlte1x]: [false]
[ro.vendor.scroll.preobtain.enable]: [true]
[ro.vendor.se.type]: [HCE,UICC]
[ro.vendor.use_data_netmgrd]: [true]
[ro.vndk.version]: [29]
[ro.wifi.channels]: []
[ro.zygote]: [zygote64_32]

//获取小米手机的机型：

/*** 如果小米手机获取Build.MODEL的结果是M2004J19C这样的格式* 那么使用反射获取小米手机型号 例如：Redmi note 9** @return*/
public static String getXiaoMiModel() {String deviceName = "";try {@SuppressLint("PrivateApi") Class c = Class.forName("android.os.SystemProperties");@SuppressLint("PrivateApi") Method m = c.getDeclaredMethod("get", String.class);m.setAccessible(true);deviceName = (String) m.invoke(null, "ro.product.vendor.marketname");Log.d("WorkPhoneCheck", "deviceName: " + deviceName);} catch (Throwable e) {e.printStackTrace();}return TextUtils.isEmpty(deviceName) ? Build.MODEL : deviceName;
}

//以上同理也可通过反射获取获取包含系统软件在内的所有内存，也就是系统参数显示的内存大小，例如4g+64g,8g+128g等信息。

//--------------------------------------------------------------完-----------------------------------------------------------------------