安卓系统内存检测--StatFsProgressBar：自定义view

先上图：

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项目要求在很多界面中展示最底部的内存状态：占用空间，可用空间大小；考虑多界面复用，我自定义view

首先绘制布局、

[java] view plain copy<?xml version="1.0" encoding="utf-8"?>  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"                  android:layout_width="match_parent"                  android:layout_height="@dimen/base22dp"                  android:orientation="vertical">        <ProgressBar          android:id="@+id/download_progressBar"          style="?android:attr/progressBarStyleHorizontal"          android:layout_width="match_parent"          android:layout_height="match_parent"          android:progress="30"          android:progressDrawable="@drawable/progressbar"/>        <LinearLayout          android:layout_width="match_parent"          android:layout_height="match_parent"          android:gravity="center_vertical"          android:orientation="horizontal">            <TextView              android:id="@+id/tv_already"              android:layout_width="wrap_content"              android:layout_marginLeft="@dimen/base15dp"              android:textColor="@color/white"              android:textSize="@dimen/base13dp"              android:layout_height="wrap_content"/>          <TextView              android:id="@+id/tv_unused"              android:layout_width="wrap_content"              android:layout_marginLeft="@dimen/base15dp"              android:textColor="@color/white"              android:textSize="@dimen/base13dp"              android:layout_height="wrap_content"/>        </LinearLayout>    </RelativeLayout>  

自定义view方法：主要通过statFs 方法获取总扇区大小以及剩余扇区大小然后求比，把值赋给progressbar

/**  * 类名称:  * 作者: aj  * 时间: 2017/11/8 下午6:32  * 功能:  */    public class MemoryProgressBarView extends RelativeLayout {        private TextView tvAlready, tvUnused;      private final ProgressBar progressBar;        public MemoryProgressBarView(Context context, AttributeSet attrs) {          super(context, attrs);            // 加载布局          View inflate = LayoutInflater.from(context).inflate(R.layout.view_memory, this);          // 获取控件          tvAlready = (TextView) findViewById(R.id.tv_already);          tvUnused = (TextView) findViewById(R.id.tv_unused);          progressBar = (ProgressBar) findViewById(R.id.download_progressBar);          progressBar.setMax(100);        }        public void initProgressBar(Context context) {            //获得sd卡的内存状态          File sdcardFileDir = Environment.getExternalStorageDirectory();          String sdcardMemory = getMemoryInfo(sdcardFileDir, context);          //获得手机内部存储控件的状态          File dataFileDir = Environment.getDataDirectory();          String dataMemory = getMemoryInfo(dataFileDir, context);    //        tvAlready.setText("SD卡: " + sdcardMemory + "\n手机内部: " + dataMemory);          tvAlready.setText("手机内部: " + dataMemory);          }        /**      * 根据路径获取内存状态      *      * @param path      * @return      */      @SuppressWarnings("deprecation")      private String getMemoryInfo(File path, Context context) {          //获得一个磁盘状态对象          StatFs stat = new StatFs(path.getPath());            //获得一个扇区的大小          long blockSize = stat.getBlockSize();            //获得扇区的总数          long totalBlocks = stat.getBlockCount();            //获得可用的扇区数量          long availableBlocks = stat.getAvailableBlocks();            //获得已用的扇区数量          long alreadyBlocks = totalBlocks - availableBlocks;            //设置进度条          long l = (((alreadyBlocks * 100) / totalBlocks));          progressBar.setProgress((int) (l));              //总空间  //        String totalMemory = Formatter.formatFileSize(context, totalBlocks * blockSize);            //占用空间          String alreadyMemory = Formatter.formatFileSize(context, alreadyBlocks * blockSize);            //可用空间          String availableMemory = Formatter.formatFileSize(context, availableBlocks * blockSize);            return "占用空间：" + alreadyMemory + "   可用空间：" + availableMemory;      }    } 

运用：在页面布局引入自定义的view

      <com.CustomView.MemoryProgressBarView          android:id="@+id/memory_progress"          android:layout_width="match_parent"          android:layout_height="@dimen/base22dp"/>  

调用方法：

 memoryView = (MemoryProgressBarView) findViewById(R.id.memory_progress);        memoryView.initProgressBar(context);

最终实现上图效果

实现上图效果