Spinner、startActivityForResult、setResult的使用

来源：互联网发布：date js 编辑：程序博客网时间：2024/04/28 02:56

效果图

功能

实现带选择所在城市的用户注册、主要为了测试带有返回值的页面

Java源码

public class UserRegisterActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_user_register);        Button choosebtn = (Button) findViewById(R.id.choosebtn);        choosebtn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(UserRegisterActivity.this, ChooseCityActivity.class);                // 有返回值的跳转 ，， 其中  0x11 为请求码                startActivityForResult(intent, 0x11);            }        });    }    /**     * 功能： 处理返回的数据     * @param requestCode     * @param resultCode     * @param data     */    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        {            if (requestCode == 0x11 && resultCode == 0x11)            {                Bundle bundle = data.getExtras();                String city = bundle.getString("city");                EditText editText = (EditText)findViewById(R.id.city);                editText.setText(city);            }        }    }}

public class ChooseCityActivity extends Activity {    Spinner spinner;    Button button;    String city = "";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_choose_city);        spinner = (Spinner)findViewById(R.id.citySpinner);        button = (Button)findViewById(R.id.returnBtn);        /**         * Spinner 的使用；         */        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                city = parent.getItemAtPosition(position).toString();            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });        /**         * 功能： 处理返回的数据         */        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = getIntent();                Bundle bundle = new Bundle();                bundle.putString("city", city);                intent.putExtras(bundle);                // 返回页面  其中 0x11为返回码                setResult(0x11, intent);                finish();            }        });    }}

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