android编译错误“OnClickListener cannot be resolved to a type”

在android代码编译时可能会出现如下错误：

部分代码：

1. <span style="font-size:18px;">public void onCreate(Bundle savedInstanceState) {
2. super.onCreate(savedInstanceState);
3. setContentView(R.layout.addnew);
4. btn_img=(ImageButton) this.findViewById(R.id.btn_img);
5. btn_img.setOnClickListener(new OnClickListener() {
6. public void onClick(View v) {
7. initImageChooseDialog();
8. imageChooseDialog.show();
9. }
10. });</span>

错误提示：OnClickListener cannot be resolved to a type

解决方案：将语句btn_img.setOnClickListener(new OnClickListener(){···}中的OnClickListener改为View.OnClickListener即可

package com.example.activitytest;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.Toast;

public class FirstActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);

		//隐藏标题栏
		requestWindowFeature(Window.FEATURE_NO_TITLE);

		//加载布局
		setContentView(R.layout.first_layout);

		Button button1 = (Button)findViewById(R.id.button1);

		button1.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub

				Toast.makeText(FirstActivity.this, "alert aaaaa button1", Toast.LENGTH_SHORT).show();

			}
		});

	}

}