Android

Question

我是 Google "coding" 的新手 Android。

目前我正在用一个按钮编写一个小应用程序。如果您单击它，它会播放随机声音。但是 :D ... 它会在每次开始时发出声音。但是如果你经常按下按钮，不会有随机声音。

不知道哪里错了

代码如下（别笑！）：

public class MainActivity extends Activity {

    //MediaPlayer
    MediaPlayer mp;
    ImageButton soundbutton;

    //Sounds
    int[] sounds={R.raw.s1, R.raw.s2, R.raw.s3, R.raw.s4, R.raw.s5, R.raw.s6, R.raw.s7, R.raw.s8, R.raw.s9, R.raw.s10};
    Random r = new Random();
    int Low = 0;
    int High = 10;
    int rndm = r.nextInt(High-Low) + Low;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);

        //MediaPlayer
        soundbutton = (ImageButton)this.findViewById(R.id.randomsoundbutton89);
        mp = MediaPlayer.create(getApplicationContext(),sounds[rndm]);
        soundbutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    if (mp.isPlaying()) {
                        mp.stop();
                        mp.release();
                        mp = MediaPlayer.create(getApplicationContext(),sounds[rndm]);
                    }
                    mp.start();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

求助！（来自德国）！

Answer 1

使用此代码获得不同的声音

@Override 
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);

//MediaPlayer 
soundbutton = (ImageButton)this.findViewById(R.id.randomsoundbutton89);
mp = MediaPlayer.create(getApplicationContext(),sounds[rndm]);
soundbutton.setOnClickListener(new View.OnClickListener() {
    @Override 
    public void onClick(View v) {
        try { 
            if (mp.isPlaying()) {
                mp.stop();
                mp.release();
                rndm = r.nextInt(High-Low) + Low;
                mp = MediaPlayer.create(getApplicationContext(),sounds[rndm]);
            } 
            mp.start();
        } catch (Exception e) {
            e.printStackTrace();
        } 
    } 
});

}

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