安卓系統內存檢測--StatFsProgressBar：自定義view

先上圖：

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項目要求在很多界面中展示最底部的內存狀態：佔用空間，可用空間大小；考慮多界面複用，我自定義view

首先繪製佈局、

[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>  

自定義view方法：主要通過statFs 方法獲取總扇區大小以及剩餘扇區大小然後求比，把值賦給progressbar

/** 
 * 類名稱: 
 * 作者: aj 
 * 時間: 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);  
  
        // 加載佈局  
        View inflate = LayoutInflater.from(context).inflate(R.layout.view_memory, this);  
        // 獲取控件  
        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) {  
  
        //獲得sd卡的內存狀態  
        File sdcardFileDir = Environment.getExternalStorageDirectory();  
        String sdcardMemory = getMemoryInfo(sdcardFileDir, context);  
        //獲得手機內部存儲控件的狀態  
        File dataFileDir = Environment.getDataDirectory();  
        String dataMemory = getMemoryInfo(dataFileDir, context);  
  
//        tvAlready.setText("SD卡: " + sdcardMemory + "\n手機內部: " + dataMemory);  
        tvAlready.setText("手機內部: " + dataMemory);  
  
  
    }  
  
    /** 
     * 根據路徑獲取內存狀態 
     * 
     * @param path 
     * @return 
     */  
    @SuppressWarnings("deprecation")  
    private String getMemoryInfo(File path, Context context) {  
        //獲得一個磁盤狀態對象  
        StatFs stat = new StatFs(path.getPath());  
  
        //獲得一個扇區的大小  
        long blockSize = stat.getBlockSize();  
  
        //獲得扇區的總數  
        long totalBlocks = stat.getBlockCount();  
  
        //獲得可用的扇區數量  
        long availableBlocks = stat.getAvailableBlocks();  
  
        //獲得已用的扇區數量  
        long alreadyBlocks = totalBlocks - availableBlocks;  
  
        //設置進度條  
        long l = (((alreadyBlocks * 100) / totalBlocks));  
        progressBar.setProgress((int) (l));  
  
  
        //總空間  
//        String totalMemory = Formatter.formatFileSize(context, totalBlocks * blockSize);  
  
        //佔用空間  
        String alreadyMemory = Formatter.formatFileSize(context, alreadyBlocks * blockSize);  
  
        //可用空間  
        String availableMemory = Formatter.formatFileSize(context, availableBlocks * blockSize);  
  
        return "佔用空間：" + alreadyMemory + "   可用空間：" + availableMemory;  
    }  
  
} 

運用：在頁面佈局引入自定義的view

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

調用方法：

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

最終實現上圖效果 實現上圖效果