如何使用浮点数据类型调用的setText（）？ [英] How to call setText() using a Float data type?

问题描述

    public void onClick(View v) {
    switch(v.getId()){
    case R.id.save2:
        s = text.getText().toString();
        number = Float.parseFloat(num.getText().toString());
        SharedPreferences.Editor editor = shared.edit();
        editor.putString("sharedtext",s);
        editor.putFloat("sharednum",number);
        editor.commit();
        Toast.makeText(this,"save2",Toast.LENGTH_SHORT).show();
        break;
    case R.id.load2:
        String returner = shared.getString("sharedtext","Returner fail");
        float returnnum = shared.getFloat("sharednum",0);
        text.setText(returner);
        num.setText(returnnum); //error here
        Toast.makeText(this,"load2",Toast.LENGTH_SHORT).show();
        break;
    case R.id.page2:
        intent= new Intent(this,SharedPreferencesActivity.class);
        startActivity(intent);
        Toast.makeText(this,"page2",Toast.LENGTH_SHORT).show();
        break;
    }

我怎么能解决这个问题？

how could i resolve this error?

如何使类似SETINT（INT NUM）;

how to make something like setInt(int num);

BTW的变量num和文字都的EditText

btw the variable num and text are both EditText

推荐答案

如果你传递一个数值作为文本到文本字段，Android将尝试跨preT它作为一个资源ID。使它成为一个文本第一。在preferred的方法是这样：

If you pass a numeric value as the text to a text field, Android will try to interpret it as a resource Id. Make it a text first. The preferred way is to do:

num.setText(String.valueOf(returnnum));

（对于要在字符串转换的良好做法，<一个href="http://stackoverflow.com/questions/1572708/is-conversion-to-string-using-int-value-bad-practice">check这个帖子）

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