Android开发 eclipse ...cannot be resolved

[GreyWang1]

Android 新人

package com.example.ex03_01;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import android.widget.EditText;
import android.widget.Button;

public class MainActivity extends Activity {
	private TextView txt;
	private EditText edit;
	private Button myButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txt= (TextView)findViewById(R.id.textView1);
        edit= (EditText)findViewById(R.id.editText1);
        myButton= (Button)findViewById(R.id.button1);
        myButton.setOnClickListener(new mClick());
    }
}
class mClick implements OnClickListener{
	public void onClick(View v){
		String inputStr;
		inputStr=edit.getText().toString();
		txt.setTxt(inputStr);
	}
}

报错： edit cannot be resolved ; txt cannot be resolved;
warning: The value of the field MainActivity.edit (txt) is not used.
res中并没有相关报错。。网上没找着对应的原因和解决方法

[jklwan]

1楼正解，不然你这个类用不了main中的字段

[hnzzstw]

1楼正解，class mClick 应该是class MainActivity的内部类

[YXTS122]

你应该把class mClick 写在class MainActivity里