android 将小时转换为分钟

Question

    et1 = (EditText) findViewById(R.id.et1);
    et2 = (EditText) findViewById(R.id.et2);

    floatET1 = Float.parseFloat(et1.getText().toString());
    floatET2 = Float.parseFloat(et2.getText().toString());

    et1.setOnFocusChangeListener(new OnFocusChangeListener() {

        public void onFocusChange(View v, boolean hasFocus) {
            if (hasFocus) {
                float sonuc1 = floatET2 * 60;
                et2.setText(sonuc1);
            }
        }
    });

    et2.setOnFocusChangeListener(new OnFocusChangeListener() {

        public void onFocusChange(View v, boolean hasFocus) {
            if (hasFocus) {
                float sonuc2 = floatET1  / 60;
                et1.setText(sonuc2);

当我点击 EditText (et2) 然后我想计算到分钟，当我点击 EditText (et1) 然后转换为小时......但我不工作:/

Answer 1

这会做你想做的事，尽管你可能想用 toast 消息或其他东西来通知用户，而不是在输入值不是有效字符串时静静地什么也不做。

et1 = (EditText) findViewById(R.id.et1);
et2 = (EditText) findViewById(R.id.et2);

et1.setOnFocusChangeListener(new OnFocusChangeListener() {

    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            try {
                floatET2 = Float.parseFloat(et2.getText().toString());
            } catch (NumberFormatException e) {
            }
            float sonuc1 = floatET2 * 60;
            et1.setText(String.valueOf(sonuc1));
        }
    }
});

et2.setOnFocusChangeListener(new OnFocusChangeListener() {

    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            try {
                floatET1 = Float.parseFloat(et1.getText().toString());
            } catch (NumberFormatException e) {
            }
            float sonuc2 = floatET1 / 60;
            et2.setText(String.valueOf(sonuc2));
        }
    }
});