Question

我有一个活动来检查设备ID和设备名称是否存在于本地数据库（sqlite）中，当设备已经注册时，我将传递给另一个名为ConnectToCostCenter的Activity 活动代码为：

public class StartActivity extends Activity {

Handler handler = new Handler();
DBHandler dbHandler;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.start_activity);
    dbHandler = new DBHandler(this);
    handler.postDelayed(new Runnable() {
        @Override
        public void run() {
            String DeviceId = Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID);
            String DeviceName = Build.MODEL;
            RegisterDevice cc = new RegisterDevice(DeviceId, DeviceName);
            if (!dbHandler.getAllDevice().isEmpty() && (dbHandler.getAllDevice().contains(cc)) ){
                final Intent mainIntent = new Intent(StartActivity.this, ConnectToCostCenter.class);
                startActivity(mainIntent);
            } else  {
              Intent intent = new Intent(StartActivity.this, CreateOrEditActivity.class);
                startActivity(intent);
            }
            StartActivity.this.finish();
        }
    }, 3000);
}

}

和ArrayList：

   public ArrayList<RegisterDevice> getAllDevice() {
    SQLiteDatabase db = this.getReadableDatabase();
    ArrayList<RegisterDevice> activityList = null;
    try{
        activityList = new ArrayList<RegisterDevice>();
        String QUERY = "SELECT * FROM "+DEVICE_TABLE_NAME;
        Cursor cursor = db.rawQuery(QUERY, null);
        if(!cursor.isLast())
        {
            while (cursor.moveToNext())
            {
                RegisterDevice activity = new RegisterDevice();

                activity.setDeviceId(cursor.getString(0));
                //     activity.setCreated(cursor.getString(2));
                //   activity.setModified(cursor.getString(3));
                activity.setDeviceName(cursor.getString(1));
                activityList.add(activity);
            }
        }
        db.close();
    }catch (Exception e){
        Log.e("error",e+"");
    }
    return activityList;
}

问题是如果设备存在于数据库中，则会显示活动CreateOrEditActivity而不是ConnectToCostCenter 请帮忙吗？

Answer 1

我认为你对匹配条件几乎没有混淆，做一些其他的方式，就像你将迭代数组列表并在循环中创建条件，无论你是否可以得到真或假，并将活动重定向到你想要的地方。

检查sqlite数据库中的设备ID和名称

1 个答案: