布局文件activity_main.xml
<?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="match_parent">
<TextView
android:id="@+id/tv_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"/>
</RelativeLayout>
MainActivity代码
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tvState = (TextView) findViewById(R.id.tv_state);
//获得sd卡的内存状态
File sdCardDir = Environment.getExternalStorageDirectory() ;
String sd = getMemoryInfo(sdCardDir) ;
//获得手机内部的存储状态
File dataDir = Environment.getDataDirectory() ;
String phone = getMemoryInfo(dataDir) ;
tvState.setText("SD卡: \n"+sd+"\n\n手机内部: \n"+phone);
}
private String getMemoryInfo(File path) {
//获得一个磁盘状态对象
StatFs stat = new StatFs(path.getPath()) ;
long blockSize = stat.getBlockSize() ; //获得一个扇区的大小
long totalBlocks = stat.getBlockCount() ; //获得扇区的数量
long availableBlocks = stat.getAvailableBlocks() ; //获得可用扇区的数量
//总空间
String totalMemory = Formatter.formatFileSize(this,blockSize* totalBlocks) ;
//可用空间
String availableMemory = Formatter.formatFileSize(this, blockSize*availableBlocks) ;
return "总空间: "+totalMemory+"\n"+"可用空间: "+availableMemory;
}
}
效果图
由于测试的手机没有sdCard,所以显示sdCard的总空间和可用空间和手机内部存储的一致,若手机有sdCard就会根据sdCard的总空间和可用空间来显示了。
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