Android獲取手機內存、SD卡總容量和剩余容量

    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;  
    }  
}  </pre>