获取内存大小：总内存 & sd卡内存

最新推荐文章于 2017-09-22 21:19:00 发布

zxdzhangxiaodong

最新推荐文章于 2017-09-22 21:19:00 发布

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分类专栏： Android Android学习笔记

本文链接：https://blog.youkuaiyun.com/zxdzhangxiaodong/article/details/38142017

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本文介绍了一个简单的Android应用程序，用于获取并显示设备的内部存储和SD卡的空间信息，包括总空间大小及可用空间大小。

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在xml中创建一个TextView

package org.gentry.readsdsize;

import java.io.File;

import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.app.Activity;
import android.text.format.Formatter;
import android.widget.TextView;

public class MainActivity extends Activity {

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

		TextView tv = (TextView) findViewById(R.id.tv);
		tv.setText(getSdCardSpaceInfo() + "\n" + getRomSpaceInfo());
	}

	/**
	 * 获取sd卡的内存空间信息
	 * 
	 * @return
	 */
	private String getSdCardSpaceInfo() {
		File path = Environment.getExternalStorageDirectory();
		StatFs stat = new StatFs(path.getPath());
		long blockSize = stat.getBlockSize();
		long totalBlocks = stat.getBlockCount();
		long availableBlocks = stat.getAvailableBlocks();

		long totalSize = blockSize * totalBlocks;
		long availSize = availableBlocks * blockSize;

		String totalStr = Formatter.formatFileSize(this, totalSize);
		String availStr = Formatter.formatFileSize(this, availSize);

		return "sd卡内存：" + totalStr + "\n" + "sd卡可用内存：" + availStr;
	}

	/**
	 * 获取手机内存空间信息
	 * 
	 * @return
	 */
	private String getRomSpaceInfo() {
		File path = Environment.getDataDirectory();
		StatFs stat = new StatFs(path.getPath());
		long blockSize = stat.getBlockSize();
		long totalBlocks = stat.getBlockCount();
		long availableBlocks = stat.getAvailableBlocks();

		long totalSize = blockSize * totalBlocks;
		long availSize = availableBlocks * blockSize;

		String totalStr = Formatter.formatFileSize(this, totalSize);
		String availStr = Formatter.formatFileSize(this, availSize);

		return "手机内存：总空间" + totalStr + "\n手机内存：可用空间" + availStr;
	}

}