Android:将微调器选择传递给新 Activity

Question

我正在开发一个项目，用户可以从微调器中选择最多五个选项，我想在按下提交按钮时在新 Activity 中显示所选选项我有一个新 Activity 在按下按钮时打开但没有显示，我需要有关我需要执行的步骤的帮助，这是我要显示数据的第二个屏幕的代码

    public class SecondScreenActivity extends Activity {

    TextView FirstIwi;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.selected_iwi);





        FirstIwi = (TextView) findViewById(R.id.spinner1);

         Intent intename = getIntent();


        String iwi1 = (String) intename.getSerializableExtra("USERNAME"); 
        //Spinner spinnername2 = (Spinner) findViewById(R.id.spinner2);



        FirstIwi.setText("First Iwi" + iwi1);


    }
}

头等舱

    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.Menu;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.Spinner;

public class IwiSelect extends Activity {

    Spinner spinner1, spinner2, spinner3, spinner4, spinner5;
    Button btnSubmit; 
    String iwi1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_iwiselect);

        addListenerOnButton();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_iwi_select, menu);
        return true;
    }




    // get the selected drop down list value
      public void addListenerOnButton() {

        spinner1 = (Spinner) findViewById(R.id.spinner1);
        spinner2 = (Spinner) findViewById(R.id.spinner2);
        spinner3 = (Spinner) findViewById(R.id.spinner3);
        spinner4 = (Spinner) findViewById(R.id.spinner4);
        spinner5 = (Spinner) findViewById(R.id.spinner5);

        btnSubmit = (Button) findViewById(R.id.btnSubmit);

        btnSubmit.setOnClickListener(new OnClickListener() {

            public void onClick(View view) {

                iwi1 = spinner1.toString();
                //Starting a new Intent
                Intent nextScreen = new Intent(IwiSelect.this, SecondScreenActivity.class);

                //Sending data to another Activity
                nextScreen.putExtra("USERNAME", iwi1);
                //nextScreen.putExtra(spinner2.getContext().toString(), false);





                // starting new activity
                startActivity(nextScreen);




    }
        });

      }
      }

Answer 1

您需要使用以下代码:

// find spinner object here
Spinner spinner1 = (Spinner) findViewById(R.id.spinner1);
//get selected value here
String itemStr = spinnername1.getSelectedItem().toString();
//put selected vale and start new activity
Intent mIntent = new Intent(ActivityOne.this, NewActivity.class);
mIntent.putExtra("data", itemStr);
startActivity(mIntent);


/**
* AT receiver side activity in onCreate
*/
Intent i = getIntent();
String dataString = i.getString("data");