java - 从微调器中选择并单击按钮以打开新 Activity

Question

当我从微调器中选择时，如何使用按钮启动新 Activity ？我的代码不过..我已经搜索了很多，但没有任何效果，希望这里发生一些事情:)

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



    ImageButton button = (ImageButton) findViewById(R.id.imgbtnarroceros);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this, Main2Activity.class);
            startActivity(intent);
        }
    });

    Spinner spinner;
    spinner= (Spinner) findViewById(R.id.spinner) ;
    ArrayAdapter adapter = ArrayAdapter.createFromResource(this, R.array.itinerary, android.R.layout.simple_spinner_item) ;
    spinner.setAdapter(adapter);

Answer 1

根据我的理解，当您从微调器中选择一个项目时，您希望打开一个带有按钮的 Activity 。如果我的理解有误，请指正。

将OnItemSelectedListener设置为微调器并处理项目选择事件。

 spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                                         @Override
                                         public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                                               switch(position){
                                                  case 0:
                                                            //start activity on selection of any item you want, here I am assuming first item.
                                                            Intent intent = new Intent(YourCurrentActivity.this, ActivityWithButton.class);
                                                            startActivity(intent);
                                                            break;


                                                     }        
                                         }

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

                                         }
                                     });