java Android Studio getText() 和 setText() 无法处理错误：“无法解析方法“getText/setText”()”
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Android Studio getText() and setText() not working with error: "can't resolve method "getText/setText"()"
提问by Danny Piper
So my app needs to read text from a text box with a tag of "inText" do stuff to it (that stuff works) then write the output to a box with the id of "outView". I've been doing this with setText() and getText().
因此，我的应用程序需要从带有“inText”标签的文本框中读取文本对其进行处理（该操作有效），然后将输出写入 ID 为“outView”的框中。我一直在用 setText() 和 getText() 来做这件事。
setText() was for writing the output below is what I used:
setText() 用于编写下面的输出是我使用的：
(TextView)findViewById(R.id.outView.setText(textoutput));
getText() was for reading the input text then writing it to a variable and below is what I used:
getText() 用于读取输入文本，然后将其写入变量，下面是我使用的：
String mEdit = (EditText)findViewById(R.id.inText.getText()).toString();
回答by Vucko
You're chaining the method at the wrong spot. Remove .getText()from R.id.inTextand place it after the brackets like (same thing for TextView):
您将方法链接到错误的位置。.getText()从R.id.inText括号中删除并将其放在括号之后，例如（与 相同TextView）：
String mEdit = ((EditText)findViewById(R.id.inText)).getText().toString();
Though this is an uncommon way to do thing. Rather initialize the EditText first and then get the text, it's much clearer that way:
虽然这是一种不常见的做事方式。而是先初始化 EditText 然后获取文本，这样更清晰：
EditText mEdit = (EditText)findViewById(R.id.inText);
String mText = mEdit.getText().toString();
回答by Md Sufi Khan
You set the getText()and setText()method in wrong place.
getText()and setText()are methods of TextView and EditText classes.
But here you used it as a method of id. That's why it's showing "Can't resolve method getText/setText()". As id has no such methods.
您将getText()andsetText()方法设置在错误的位置。
getText()和setText()是 TextView 和 EditText 类的方法。但是在这里您将其用作 id 的方法。这就是为什么它显示“无法解析方法 getText/setText()”的原因。因为 id 没有这样的方法。
You can do the following.
您可以执行以下操作。
((TextView) findViewById(R.id.outView)).setText(textoutput);
and
和
String mEdit = ((EditText) findViewById(R.id.inText)).getText().toString();
回答by Ido Naveh
It's not working since you need to first set the TextView:
它不起作用，因为您需要先设置 TextView：
TextView tvOut = (TextView) findViewById(R.id.outView);
TextView tvIn = (TextView) findViewById(R.id.inText);
String out = tvOut.getText().toString();
String in = tvIn.setText(out);
回答by sivi
If you use a field check the compiler didn't automatically set it as a view instead of EditText type.
如果您使用字段检查，编译器不会自动将其设置为视图而不是 EditText 类型。
Also the casts are redundant now so you better not use them if you don't have to
此外，演员阵容现在是多余的，因此如果您不必，最好不要使用它们
