Question

我试图获取任何应用程序的新鲜度值，即之前启动它的时间。为此我在 MyBroadcastReceiver 类的 onReceive（上下文上下文，Intent intent）函数内计算下面代码给出的时间。

Calendar c = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String formattedDate = df.format(c.getTime());
String[] dateandtime= formattedDate.split(" ");
String mydate = dateandtime[0];
String mytime = dateandtime[1];
Toast.makeText(context.getApplicationContext(), formattedDate, Toast.LENGTH_SHORT).show();

在此之后，我将信息存储在函数末尾的SQL数据库中，如下所示

        MyDatabaseHelper myDb;
        myDb = new MyDatabaseHelper(context);
        boolean r = myDb.insertData(mytime,lat ,lon , mydate,  weekday, myNetwork, nameWIFI , audiojack, powersaver, appfullname );
        if(r == true){
            Toast.makeText(context.getApplicationContext(),"data inserted",Toast.LENGTH_LONG).show();

        }else {
            Toast.makeText(context.getApplicationContext(),"data not inserted",Toast.LENGTH_LONG).show();
        }

我希望从应用程序启动之前到再次启动时获得时间差异。你能告诉我怎么做吗？

Answer 1

您可以执行以下操作

@Override
public void onReceive(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    // Get the system time
    long currentTime = System.currentTimeMillis();
    // Store latest time in DB;
    storeTime(currentTime);
    getTimeDiff(currentTime);
}

private storeTime(time) {
    // Insert in DB
}

private long getTimeDiff(currentTime) {
    long previousTime = <Fetch earlier saved data if any>;
    return currentTime - previousTime; // this will return you milliseconds
}

如何从以前推出的任何应用程序中获取时间（新鲜度值）？

1 个答案: