从Spinner菜单Android-Java插入价值

分类：编程问答

如何解决从Spinner菜单Android-Java插入价值

我仍然无法将Spinner中的值插入数据库。按提交按钮时，应用崩溃。如果有人能够帮助我，我将非常感激。提前致谢。 PHP脚本运行良好。

public class SecondPan extends AppCompatActivity implements AdapterView.OnItemClickListener {
private Spinner sspnOption6,sspn2;
private TextView ttxOption6,ttx;
EditText umowa,nazwa,kategorie,opis,zabezpieczenia,dane;
String czy_dane,transfer;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second_pan);

    Spinner sspn2 ;

    Spinner sspnOption6 ;

    umowa = (EditText) findViewById(R.id.scnd_txt1);
    nazwa = (EditText) findViewById(R.id.scnd_txt2);
    kategorie = (EditText) findViewById(R.id.scnd_txt3);
    opis = (EditText) findViewById(R.id.scnd_tx4);
    zabezpieczenia = (EditText) findViewById(R.id.scnd_tx6);
    dane = (EditText) findViewById(R.id.scnd_tx7);


    sspnOption6 = findViewById(R.id.sspn);
    ArrayAdapter<CharSequence> FirstAdapter = new ArrayAdapter<CharSequence>(this,android.R.layout.simple_spinner_item,getResources().getStringArray(R.array.tab1));
    FirstAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    sspnOption6.setAdapter(FirstAdapter);

    sspn2=findViewById(R.id.sspn2);
    ArrayAdapter<CharSequence> Secondadapter = new ArrayAdapter<CharSequence>(this,getResources().getStringArray(R.array.transfer));
    Secondadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    sspn2.setAdapter(Secondadapter);


    czy_dane = sspn2.getSelectedItem().toString();
    transfer = sspnOption6.getSelectedItem().toString();


}
public void onItemClick(AdapterView<?> parent,View view,int position,long l) {
    String text = parent.getItemAtPosition(position).toString();
    Toast.makeText(parent.getContext(),text,Toast.LENGTH_SHORT).show();

}

public void OnInsert(View view ) {
    String str_czy_dane = sspn2.getSelectedItem().toString();
    String str_umowa = umowa.getText().toString();
    String str_nazwa = nazwa.getText().toString();
    String str_kategorie = kategorie.getText().toString();
    String str_opis = opis.getText().toString();
    String str_transfer  = sspnOption6.getSelectedItem().toString();
    String str_zabezpieczenia = zabezpieczenia.getText().toString();
    String str_dane = dane.getText().toString();
    String type = "insert";
    BackgroundWorker backgroundWorker = new BackgroundWorker(this);
    backgroundWorker.execute(type,str_czy_dane,str_umowa,str_nazwa,str_kategorie,str_opis,str_transfer,str_zabezpieczenia,str_dane);
}

}

下面是BackgroundWorker类，我在其中通过POST方法发送值。在这里，类型等于（“插入”），但是我将粘贴整个代码。谢谢。

public class BackgroundWorker extends AsyncTask<String,Void,String> {
Context context;
AlertDialog alertDialog;

BackgroundWorker (Context ctx) {
    context = ctx;
}
@Override
protected String doInBackground(String... params) {
    String type = params[0];
    String login_url = "http://10.0.2.2/login.php";
    String register_url="http://10.0.2.2/register.php";
    String insert_url = "http://10.0.2.2/wspol_adm.php";
    String admin_url= "http://10.0.2.2/admin.php";
    if(type.equals("login")) {
        try {
            String user_name = params[1];
            String password = params[2];

            URL url = new URL (login_url);
            HttpURLConnection httpURLConnection=(HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);

            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
            String post_data = URLEncoder.encode("user_name","UTF-8")+"="+URLEncoder.encode(user_name,"UTF-8")+"&"
                    +URLEncoder.encode("password","UTF-8")+"="+URLEncoder.encode(password,"UTF-8");
            bufferedWriter.write(post_data);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();
            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1")) ;
            String result="";
            String line="";
            while((line = bufferedReader.readLine())!=null) {
                result+= line;
            }


            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    } if(type.equals("register")){
        try {
            String username = params[1];
            String password = params[2];

            URL url = new URL (register_url);
            HttpURLConnection httpURLConnection=(HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
            String post_data = URLEncoder.encode("username","UTF-8")+"="+URLEncoder.encode(username,"iso-8859-1")) ;
            String result="";
            String line="";
            while((line = bufferedReader.readLine())!=null) {
                result+= line;
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }


    }
      if(type.equals("insert")){

        try {
            String czy_dane = params[1];
            String umowa = params[2];
            String nazwa = params[3];
            String kategorie = params[4];
            String opis = params[5];
            String transfer = params[6];
            String zabezpieczenia = params[7];
            String dane = params[8];

            URL url = new URL (insert_url);
            HttpURLConnection httpURLConnection=(HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            httpURLConnection.setDoInput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
            String post_data = URLEncoder.encode("czy_dane","UTF-8")+"="+URLEncoder.encode(czy_dane,"UTF-8")+"&"+
                    URLEncoder.encode("umowa","UTF-8")+"="+URLEncoder.encode(umowa,"UTF-8")+"&"
            +URLEncoder.encode("nazwa","UTF-8")+"="+URLEncoder.encode(nazwa,"UTF-8")+"&"
            +URLEncoder.encode("kategorie","UTF-8")+"="+URLEncoder.encode(kategorie,"UTF-8")+"&"
            +URLEncoder.encode("opis","UTF-8")+"="+URLEncoder.encode(opis,"UTF-8")+"&"
            +URLEncoder.encode("transfer","UTF-8")+"="+URLEncoder.encode(transfer,"UTF-8")+"&"
            +URLEncoder.encode("zabezpieczenia","UTF-8")+"="+URLEncoder.encode(zabezpieczenia,"UTF-8")+"&"
                    +URLEncoder.encode("dane","UTF-8")+"="+URLEncoder.encode(dane,"iso-8859-1")) ;
            String result="";
            String line="";
            while((line = bufferedReader.readLine())!=null) {
                result+= line;
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }


    }


    return null;
}

@Override
protected void onPreExecute() {
    alertDialog = new AlertDialog.Builder(context).create();
    alertDialog.setTitle("Login status");


}

@Override
protected void onPostExecute(String result) {
    alertDialog.setMessage(result);
    alertDialog.show();

}

@Override
protected void onProgressUpdate(Void... values) {
    super.onProgressUpdate(values);
}

}

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