android 获取手机SD卡和手机的内部存储

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在开发过程中有时候会获取手机的SD存储使用状况。

布局文件

<LinearLayout 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:orientation="vertical" >    <TextView        android:id="@+id/memory"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:gravity="center"/></LinearLayout>

实现类

package com.example.phonememorystate;import java.io.File;import java.text.Format;import android.app.Activity;import android.os.Bundle;import android.os.Environment;import android.os.StatFs;import android.text.format.Formatter;import android.widget.TextView;public class MainActivity extends Activity {private TextView memoryInfo;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                memoryInfo = (TextView) findViewById(R.id.memory);        //外部存储的地址        File SDPath = Environment.getExternalStorageDirectory();        String SDMemory = getMemoryInfo(SDPath);        //手机内部存储的地址        File PhonePath = Environment.getDataDirectory();        String PhoneMemory = getMemoryInfo(PhonePath);        memoryInfo.setText("SD卡：" + SDMemory + "\n手机内存：" + PhoneMemory);            }        private String getMemoryInfo(File path){    //获取一个磁盘的状态对象    StatFs stat = new StatFs(path.getPath());    //获得一个扇区的大小    long blockSizes = stat.getBlockSize();    //获取扇区总数    long totalBlocks = stat.getBlockCount();    //获得可用扇区数量    long availableBlocks = stat.getAvailableBlocks();    //获得总空间    String totalMemory = Formatter.formatFileSize(this, blockSizes * totalBlocks);    //获得可用空间    String availableMemory = Formatter.formatFileSize(this, availableBlocks * blockSizes);    return "总空间：" + totalMemory + "\n可用空间" + availableMemory;    }}

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