选择微调器选项时打开纯文本

Question

我有一个带有一些选项的微调器，我想在选择特定的“其他”选项时更改文本框的可见性，我应该怎么做？

this.arraySpinner = new String[] {"Mobile", "Gaming", "Media Features", "Medical", "Sports And Nutrition","Security","Space","Other"};
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_spinner_item, arraySpinner);
    categories.setAdapter(adapter);

Answer 1

试试这个：

.................
........................

this.arraySpinner = new String[] {"Mobile", "Gaming", "Media Features", "Medical", "Sports And Nutrition","Security","Space","Other"};

// Views
categories= (Spinner) findViewById(R.id.spinner);
textView = (TextView) findViewById(R.id.textView);

// Adapter
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, arraySpinner);
categories.setAdapter(adapter);

// Set onItemSelected listener to spinner
categories.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            TextView spinnerText = (TextView) view;

            // Checking weather selected item is "Other" or not
            if (spinnerText.getText().equals("Other"))
            {
                // Hide TextView
                textView.setVisibility(View.INVISIBLE); // or View.GONE
            }
        }

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

        }
    });

.............
...................

希望这会有所帮助

Answer 2

你可以在微调器中实现 OnItemSelected 并做你想做的事情。

    categories.setOnItemSelectedListener(new OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {

        if(arraySpinner!=null && arraySpinner[position].equalIgnoreCase("Other")){
           // your code here
        }

    }

    @Override
    public void onNothingSelected(AdapterView<?> parentView) {
        // your code here
    }

});