Question

以下是我当前代码的快速问题。它是在Android Studio中创建的：

CoreCompatibilityPreferences.IsAltKeyRequiredInAccessKeyDefaultScope = true;

我有4个阵列，应该是声音。我希望能够通过数组更改下拉菜单/微调器的不同位置使用的声音。

我的问题是，当我在OnCreate中创建myMediaPlayer时，我不知道如何更改它。 int current_index被设置为与微调器的位置相同，所以我想根据我的微调器中的菜单编号将它添加到数组的位置。我已经尝试了自己的手，但我对android studio相当缺乏经验，我找到的样本，使用了代码

public class OptionActivity extends Activity {
Spinner spnr;

int songs[] = new int[] {R.raw.sound1,R.raw.sound1,R.raw.sound3,R.raw.sound4};

MediaPlayer myMediaPlayer;
int current_index = 0;
String[] mySelectSounds = {
        "Robot",
        "Manly man",
        "Woman",
        "Cat",
};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_option);
    myMediaPlayer = MediaPlayer.create(this, songs[0]);
    spnr = (Spinner)findViewById(R.id.spinner);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(
            this, android.R.layout.simple_spinner_item, mySelectSounds);

    spnr.setAdapter(adapter);
    spnr.setOnItemSelectedListener(
            new AdapterView.OnItemSelectedListener() {

                @Override
                public void onItemSelected(AdapterView<?> arg0, View    arg1,
                                           int arg2, long arg3) {
                    int position = spnr.getSelectedItemPosition();
                    Toast.makeText(getApplicationContext(), "You have selected " + mySelectSounds[+position], Toast.LENGTH_LONG).show();
                    current_index = (current_index + position);
                    if (position == 3) {
                       myMediaPlayer.start();
//What to put here, to make it change the array number in myMediaPlayer = MediaPlayer.create(this, songs[0]);?
                   }}

根据这里提出的其他问题似乎有效，但它对我不起作用。

Answer 1

您需要在项目中单击

创建这样的新MediaPlayer

MediaPlayer mp = MediaPlayer.create(OptionActivity.this, songs[current_index]);

Answer 2

尝试

 current_index = position;
                    if (current_index == 3) {
                       myMediaPlayer.start();
    myMediaPlayer = MediaPlayer.create(this, songs[current_index]);
                   }}

在OnCreate中使用后更改数组的位置

2 个答案: