黑马Android:获取sd卡剩余容量

来源：互联网发布：无线网络破解软件编辑：程序博客网时间：2024/05/17 01:55

import java.io.File;import android.os.Build;import android.os.Bundle;import android.os.Environment;import android.os.StatFs;import android.support.v7.app.ActionBarActivity;import android.text.format.Formatter;import android.widget.TextView;public class MainActivity extends ActionBarActivity {    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        File path = Environment.getExternalStorageDirectory();        StatFs stat = new StatFs(path.getPath());        long blockSize;        long totalBlocks;        long availableBlocks;        //获取当前系统版本        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2){             blockSize = stat.getBlockSizeLong();             totalBlocks = stat.getBlockCountLong();             availableBlocks = stat.getAvailableBlocksLong();        }   else{            blockSize = stat.getBlockSize();            totalBlocks = stat.getBlockCount();            availableBlocks = stat.getAvailableBlocks();        }        TextView tv = (TextView) findViewById(R.id.tv);        tv.setText(formatSize(availableBlocks * blockSize));    }    private String formatSize(long size) {        return Formatter.formatFileSize(this, size);    } }

<!--布局文件--><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="indi.cc.getsdavail.MainActivity" >     <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        /></RelativeLayout>

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