获取安卓内存状态

package com.itheiima28.memorydemo; import java.io.File;import android.app.Activity;import android.os.Bundle;import android.os.Environment;import android.os.StatFs;import android.text.format.Formatter;import android.view.Menu;import android.view.MenuItem;import android.widget.TextView;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);TextView tvMemoryInfo = (TextView) findViewById(R.id.tv_memory_info);//获得sd卡的内存状态File sdcardFileDir = Environment.getExternalStorageDirectory();System.out.println(sdcardFileDir.toString());String sdcardMemory = getMemoryInfo(sdcardFileDir);//获得手机内部存储控件的状态File dataFileDir = Environment.getDataDirectory();//   /dataString dataMemory = getMemoryInfo(dataFileDir);//System.out.println(dataFileDir.toString());tvMemoryInfo.setText("SD卡："+sdcardMemory + "\n手机内部内存："+dataMemory);}/** * 根据路径获取内存的状态 * */public String getMemoryInfo(File path){//获得一个磁盘状态对象//File path = Environment.getExternalStorageDirectory();        StatFs stat = new StatFs(path.getPath());        long blockSize = stat.getBlockSize();//获得一个扇区的大小        long totalBlocks = stat.getBlockCount(); //获得一个扇区的总数        long availableBlocks = stat.getAvailableBlocks();//获得可用的扇区                        //总空间        String totalMemory = Formatter.formatFileSize(this, totalBlocks*blockSize);        //可用空间        String availableMemory = Formatter.formatFileSize(this, availableBlocks*blockSize);                return "总空间:" + totalMemory + "\n" + "可用空间:" + availableMemory;}}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.itheiima28.memorydemo.MainActivity" >    <TextView        android:id="@+id/tv_memory_info"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerInParent="true"  /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.itheiima28.memorydemo"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="14"        android:targetSdkVersion="21" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

关于找内存空间源码:  在安卓Total space

查找结果：

进入之后再次查找

再次搜索：memory_sd_size

Memory.java中的有关代码:

   <span style="white-space:pre"></span> File path = Environment.getExternalStorageDirectory();                StatFs stat = new StatFs(path.getPath());                long blockSize = stat.getBlockSize();                long totalBlocks = stat.getBlockCount();                long availableBlocks = stat.getAvailableBlocks();                                mSdSize.setSummary(formatSize(totalBlocks * blockSize));                mSdAvail.setSummary(formatSize(availableBlocks * blockSize) + readOnly);                mSdMountToggle.setEnabled(true);                mSdMountToggle.setTitle(mRes.getString(R.string.sd_eject));                mSdMountToggle.setSummary(mRes.getString(R.string.sd_eject_summary));