Question

public NumberPicker(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs);
        setOrientation(VERTICAL);
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        inflater.inflate(R.layout.number_picker, this, true);
        mHandler = new Handler();
        InputFilter inputFilter = new NumberPickerInputFilter();
        mNumberInputFilter = new NumberRangeKeyListener();
        mIncrementButton = (NumberPickerButton) findViewById(R.id.increment);
        mIncrementButton.setOnClickListener(this);
        mIncrementButton.setOnLongClickListener(this);
        mIncrementButton.setNumberPicker(this);
        mDecrementButton = (NumberPickerButton) findViewById(R.id.decrement);
        mDecrementButton.setOnClickListener(this);
        mDecrementButton.setOnLongClickListener(this);
        mDecrementButton.setNumberPicker(this);

        mText = (EditText) findViewById(R.id.timepicker_input);
        mText.setOnFocusChangeListener(this);
        mText.setFilters(new InputFilter[] {inputFilter});
        mText.setRawInputType(InputType.TYPE_CLASS_NUMBER);

        if (!isEnabled()) {
            setEnabled(false);
        }

        mStart = DEFAULT_MIN;
        mEnd = DEFAULT_MAX;
    }

嘿，伙计们，我知道Unable to instantiate activity ComponentInfo是由于super（）引起的。请帮我一样。请为我提供相同的内容。我真的不知道怎么创建为这个类创建super（）。

Answer 1

super(this, attrs,0);

并且代码正在运行

无法实例化活动ComponentInfo- super（）

1 个答案: