Question

我正在尝试将两个微调器中的字符串“año”和“artista”传递给下一个活动，我得到的值是“año”，但“artista”总是无效的。我使用这种方法来获取其他活动中的值，并且它可以工作但是在这里，“artista”总是无效的。而且，我尝试过切换方法而没有成功。

我希望有人帮助我并告诉我我做错了什么。我在寻求帮助之前阅读并查找信息，

这是我的代码，

System.out.println("Author List: " + authorList);

如果有人可以帮助我，

提前致谢，

Answer 1

可能你试图用另一个名字捕捉一串意图。

试试这段代码：

<强> SpinnerTest.java

public class SpinnerTest extends Activity implements AdapterView.OnItemSelectedListener {


    String year;
    String artist;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.spinner_activity);

        Spinner spinnerYear = (Spinner) findViewById(R.id.spinner1);
        final String[] years = {"1995", "2000", "2005"};
        spinnerYear.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, years));
        spinnerYear.setOnItemSelectedListener(this);

        Spinner spinnerArtists = (Spinner) findViewById(R.id.spinner2);
        final String[] artists = {"Michael Jackson", "U2", "Depeche Mode"};
        spinnerArtists.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, artists));
        spinnerArtists.setOnItemSelectedListener(this);

        Button btnSearch = (Button) findViewById(R.id.btnSearch);
        btnSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent searchIntent = new Intent(SpinnerTest.this, SearchActivity.class);
                searchIntent.putExtra("year", year);
                searchIntent.putExtra("artist", artist);
                startActivity(searchIntent);

            }
        });
    }

    @Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
        switch (adapterView.getId()){
            case R.id.spinner1:
                year = adapterView.getSelectedItem().toString();
                Toast.makeText(SpinnerTest.this, year, Toast.LENGTH_LONG).show();
                break;
            case R.id.spinner2:
                artist = adapterView.getSelectedItem().toString();
                Toast.makeText(SpinnerTest.this, artist, Toast.LENGTH_LONG).show();
                break;
        }

    }

    @Override
    public void onNothingSelected(AdapterView<?> adapterView) {

    }
}

<强> SearchActivity.java：

public class SearchActivity extends ActionBarActivity {

    String year;
    String artist;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_receive_spinner_value);
        TextView txtYear = (TextView) findViewById(R.id.txtYear);
        TextView txtArtist = (TextView) findViewById(R.id.txtArtist);

        if(getIntent().hasExtra("year")){
            year = getIntent().getStringExtra("year");
            txtYear.setText(year);
        }
        if(getIntent().hasExtra("artist")){
            artist = getIntent().getStringExtra("artist");
            txtArtist.setText(artist);
        }
    }


}

它对我有用

从两个微调器获取值到字符串变量

1 个答案: