SeekBar的報錯解決方法

學習SeekBar時報以下錯誤
：

Multiple markers at this line

    - OnSeekBarChangeListener cannot be resolved to a type
    - The method setOnSeekBarChangeListener(SeekBar.OnSeekBarChangeListener) in the type SeekBar is not applicable for the

     arguments (new OnSeekBarChangeListener(){})

The method onStopTrackingTouch(SeekBar) of type new OnSeekBarChangeListener(){} must override or implement a supertype method

The method onProgressChanged(SeekBar, int, boolean) of type new OnSeekBarChangeListener(){} must override or implement a supertype method

package com.example.seekbartext;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	TextView tv;
	SeekBar sb;
	int status;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		tv = (TextView) findViewById(R.id.textView1);
		sb = (SeekBar) findViewById(R.id.seekBar1);
		sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
			
			@Override
			public void onStopTrackingTouch(SeekBar seekBar) {
				Toast.makeText(MainActivity.this, "滑動結束", 0).show();
			}
			
			@Override
			public void onStartTrackingTouch(SeekBar seekBar) {
				Toast.makeText(MainActivity.this, "滑動開始", 0).show();				
			}
			
			@Override
			public void onProgressChanged(SeekBar seekBar, int progress,
					boolean fromUser) {
				tv.setText("當前值爲："+progress);

			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

主要解決方法是發現   

sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

new的監聽器通過提示Alt+/自動輸入，但並沒有自動導包

導入包就能解決

import android.widget.SeekBar.OnSeekBarChangeListener;