java - Android 上的随机音乐播放器

Question

所以我正在 Android 上制作这个星球大战粉丝应用程序。

我有尤达的这张图片和他的一个按钮。当您点击它时，现在他会说一句话(使用媒体播放器)。问题是，我想让他说不同的话，所以我得到了 4 个不同的 MP3 文件，但是当用户单击按钮时，如何让它随机选择播放哪个文件？

这是我现在的代码:

package be.ehb.arnojansens.simpleFrag;

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import be.ehb.arnojansens.fragmentexampleii.R;

public class SimpleFragmentActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_fragment);

        final Button advice = (Button) findViewById(R.id.YodaAdvice);
        final MediaPlayer mp = MediaPlayer.create(this, R.raw.yodamessage);

        advice.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Toast.makeText(getApplicationContext(), "Hmm Busy I Am", Toast.LENGTH_LONG).show();
                mp.start();

            }
        });

    }

}

Answer 1

您可以收到 4 条最终消息

final MediaPlayer mp = MediaPlayer.create(this, R.raw.yodamessage);
final MediaPlayer mp1 = MediaPlayer.create(this, R.raw.yodamessage1);//File names would be different I guess
final MediaPlayer mp2 = MediaPlayer.create(this, R.raw.yodamessage2);
final MediaPlayer mp3 = MediaPlayer.create(this, R.raw.yodamessage3);

你还需要一个随机

Random random=new Random();

然后在您的点击方法中

int r = random.nextInt(4);
if(r==0){
mp.start();
Toast.makeText(getApplicationContext(), "Hmm Busy I Am", Toast.LENGTH_LONG).show();
} 
if(r==1){
mp1.start();
Toast.makeText(getApplicationContext(), "I'm hungry", Toast.LENGTH_LONG).show();
} 
if(r==2){
mp2.start();
Toast.makeText(getApplicationContext(), "My droid now", Toast.LENGTH_LONG).show();
} 
if(r==3){
mp3.start();
Toast.makeText(getApplicationContext(), "Not droid you are looking for", Toast.LENGTH_LONG).show();
}