package com.hiscene.testsd;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Environment;
import android.text.format.Formatter;
import android.widget.Toast;
import java.io.File;
public class MainActivity extends AppCompatActivity {
private MainActivity activity;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
activity=MainActivity.this;
}
//判斷SD是否準備就緒
private boolean SdCardIsReady() {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
Toast.makeText(activity, "sdcard就緒", Toast.LENGTH_SHORT).show();
return true;
} else {
Toast.makeText(activity, "sdcard不存在或未掛載", Toast.LENGTH_SHORT).show();
return false;
}
}
//獲取SD卡使用記憶體（單位：位元組）
private long GetUseSpace() {
File ext = Environment.getExternalStorageDirectory();//SD卡目錄
return ext.getUsableSpace();
}
//獲取SD卡總記憶體（單位：位元組）
private long GetTotalSpace() {
File ext = Environment.getExternalStorageDirectory();//SD卡目錄
return ext.getTotalSpace();
}
}
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