设置输入范围1-30

Question

我从用户处使用EditText获得输入，但我不希望输入超过30，这是他的输入应在1-30范围内，我应该怎么做？

        final EditText personcount = findViewById(R.id.personcount);
        final TextView personcountview = findViewById(R.id.personcountview);
        final TextView itemcountview = findViewById(R.id.itemcountview);
        final EditText itemcount = findViewById(R.id.itemcount);
        personcount.setFilters(new InputFilter[]{new InputFilter.LengthFilter(1)});
        itemcount.setFilters(new InputFilter[]{new InputFilter.LengthFilter(1)});
        Toast.makeText(this, "EditText limit set to a single digit", Toast.LENGTH_SHORT).show();
        Button next1 = findViewById(R.id.next1);
        next1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int num1= Integer.parseInt(personcount.getText().toString());
                int num2 = Integer.parseInt(itemcount.getText().toString());

                Intent personname = new Intent(getApplicationContext(), personname.class);

                    personname.putExtra("num", num1);
                    personname.putExtra("num2",num2);
                    startActivity(personname);

            }

Answer 1

您可以在xml的editText中设置maxLength：

android:maxLength="30"

或设置过滤器：

TextView edit= new TextView(...);
InputFilter[] filterArray = new InputFilter[1];
filterArray[0] = new InputFilter.LengthFilter(30);
edit.setFilters(filterArray);