Android教程错误:edit_message无法解析或不是字段

Question

我试图按照Android教程但在我尝试运行代码后出现此错误.这是我的MainActivity.

    package com.example.menuexample;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;


public class MainActivity extends Activity {
    public final static String EXTRA_MESSAGE="com.example.menuexample.MESSAGE";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void sendMessage(View view){ 
        Intent intent = new Intent(this, DisplayMessageActivity.class); 
        EditText editText= (EditText) findViewById(R.id.edit_message);  --HERE
        String message = editText.getText().toString();
        intent.putExtra(EXTRA_MESSAGE, message);
        startActivity(intent); 
    }


}

我进入了activity_main:

<EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:hint="@string/edit_message" >

</EditText>

此外,strings.xml还具有:

<string name="edit_message">Test</string>

Answer 1

更改

EditText editText= (EditText) findViewById(R.id.edit_message); 

至

EditText editText= (EditText) findViewById(R.id.editText1); 

因为您已在xml布局中使用editText1 id声明了Edittext,但您正在尝试查找不存在的控件ID