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android 判断sd的状态，所有文件，剩余空间的大小

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【android 判断sd的状态，所有文件，剩余空间的大小】书到用时方恨少，事非经过不知难。这篇文章主要讲述android 判断sd的状态，所有文件，剩余空间的大小相关的知识，希望能为你提供帮助。

public class MainActivity extends AppCompatActivity {

String TAG = MainActivity.class.getCanonicalName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

String storageState = Environment.getExternalStorageState();
//sd卡的状态
Log.e(TAG, "onCreate: "+storageState );
Log.e(TAG, "onCreate: "+Environment.MEDIA_MOUNTED );
//判断是否有sd卡
boolean equals = Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
Log.e(TAG, "onCreate: "+equals);
//得到sd卡的路径
String absolutePath = Environment.getExternalStorageDirectory().getAbsolutePath();
Log.e(TAG, "onCreate: "+absolutePath );

//得到内置sd卡内所有的文件
File file = Environment.getExternalStorageDirectory();
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
Log.e(TAG, "onCreate: "+files[i] );
}
long freeSpace = Environment.getExternalStorageDirectory().getFreeSpace();
long usableSpace = Environment.getExternalStorageDirectory().getUsableSpace();
long totalSpace = Environment.getExternalStorageDirectory().getTotalSpace();
Log.e(TAG, "onCreate: 剩余空间大小："+freeSpace/1024/1024+" 可用大小:"+usableSpace/1024/1024+" 总空间大小:"+totalSpace/1024/1024 );

}
}

demo下载地址：https://github.com/renjiemei1225/ExtraTest



































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