小编hos*_*ein的帖子

我有一个带有两个播放和暂停按钮(当前不可见)和一个搜索栏的活动.当我按下播放按钮时,暂停按钮应该可见,当我按下暂停按钮时,它应该变为不可见.

我该怎么办？

import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;


    public class MainActivity extends Activity implements Runnable, OnClickListener, OnSeekBarChangeListener{
        private SeekBar seekBar;
        private Button startMedia;
        private Button pauseMedia;
        private MediaPlayer mp;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);             

            AudioControl();         

        }

        public void AudioControl(){
            seekBar = (SeekBar) findViewById(R.id.seekBar1);
            startMedia = (Button) findViewById(R.id.button1);
            pauseMedia = (Button) findViewById(R.id.button2);
            seekBar.setOnSeekBarChangeListener(this);
            startMedia.setOnClickListener(this);
            pauseMedia.setOnClickListener(this); 
        }



        public void run() {
            int currentPosition= 0;
            int total = mp.getDuration();
            while …