獲取手機的儲存空間

package com.itheima28.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.View;
import android.widget.TextView;


public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

TextView tvMemoryInfo = (TextView) findViewById(R.id.tv_memory_info);

// 獲得sd卡的內存狀態
File sdcardFileDir = Environment.getExternalStorageDirectory();
String sdcardMemory = getMemoryInfo(sdcardFileDir);

// 獲得手機內部存儲控件的狀態
File dataFileDir = Environment.getDataDirectory();
String dataMemory = getMemoryInfo(dataFileDir);

tvMemoryInfo.setText("SD卡: " + sdcardMemory + "\n手機內部: " + dataMemory);
}


/**
* 根據路徑獲取內存狀態
* @param path
* @return
*/
private String getMemoryInfo(File path) {
// 獲得一個磁盤狀態對象
        StatFs stat = new StatFs(path.getPath());
        
        long blockSize = stat.getBlockSize(); // 獲得一個扇區的大小
        
        long totalBlocks = stat.getBlockCount(); // 獲得扇區的總數
        
        long availableBlocks = stat.getAvailableBlocks(); // 獲得可用的扇區數量
        
        // 總空間
        String totalMemory =  Formatter.formatFileSize(this, totalBlocks * blockSize);
        // 可用空間
        String availableMemory = Formatter.formatFileSize(this, availableBlocks * blockSize);

return "總空間: " + totalMemory + "\n可用空間: " + availableMemory;
}
}