代码内，我添加了三个按键：Start Activity；Stop Activity 和 Suspend Activity
它们分别用来播放音乐，停止播放音乐和暂停播放。
package mth.android;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class AndroidActivity extends Activity implements View.OnClickListener {
// Define a media player
private MediaPlayer mediaPlayer = null;
private int curPos = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//final View textDisplayer = this.findViewById(R.id.displayText);
//final TextView textDisplayer = (TextView) this.findViewById(R.id.displayText);
Button startActivityButton = (Button)this.findViewById(R.id.startAndroidActivity);
startActivityButton.setOnClickListener(this);
Button stopActivityButton = (Button)this.findViewById(R.id.stopAndroidActivity);
stopActivityButton.setOnClickListener(this);
Button suspendActivityButton = (Button)this.findViewById(R.id.suspendAndroidActivity);
suspendActivityButton.setOnClickListener(this);
/*
Button startActivityButton = (Button)this.findViewById(R.id.startAndroidActivity);
startActivityButton.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
display(textDisplayer);
}
});
*/
/*
View startActivityButton = this.findViewById(R.id.startAndroidActivity);
startActivityButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
textDisplayer.setText("Hello World");
textDisplayer.setBackgroundColor(0xFFFFFFFF);
}
}
);
*/
/*
TextView text = new TextView(this);
text.setText("Hello World");
setContentView(text);
*/
}
public void display(TextView tv)
{
tv.setText("Hello world");
tv.setBackgroundColor(0xFFFFFF00);
}
public void onClick(View v) {
//int curPos = 0;;
switch (v.getId())
{
case R.id.startAndroidActivity:
// TODO Auto-generated method stub
final TextView textDisplayer = (TextView) this.findViewById(R.id.displayText);
textDisplayer.setText("Hello world");
textDisplayer.setBackgroundColor(BIND_AUTO_CREATE);
// Start media player
mediaPlayer = MediaPlayer.create(this, R.raw.just_one_last_dance);
mediaPlayer.seekTo(0);
mediaPlayer.start();
break;
case R.id.stopAndroidActivity:
mediaPlayer.stop();
break;
case R.id.suspendAndroidActivity:
if(true == mediaPlayer.isPlaying())
{
curPos = mediaPlayer.getCurrentPosition();
mediaPlayer.pause();
}
else
{
mediaPlayer.seekTo(curPos);
mediaPlayer.start();
}
break;
default:
break;
}
}
}