带音频的ListView不播放
你好,你好吗?
我试着做一个音频列表视图,所有的东西看起来都是按原样流动的,但是当我点击一个列表项时,音频应该会重现,但它似乎“应用程序停止工作”我不明白我的代码有什么问题,有人可以帮我,我有时会崩溃,但我无法解决这个问题。下面是logcat,然后是我的代码,请有人帮我把它弄好。
-谢谢你
Logcat
mainActivity.Class类
public class MainActivity extends AppCompatActivity {
ListView lv;
MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.memes_main);
lv = findViewById(R.id.lv);
mp = new MediaPlayer();
ArrayList<memes> item = new ArrayList<>();
item.add(new memes("Gemidão", R.raw.gemidaoremix));
item.add(new memes("Nunca nem vi", R.raw.nuncanemvi));
ArrayAdapter<memes> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, item);
lv.setAdapter(adapter);
lv.setAdapter(new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, item));
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view,
int position, long id) {
playSong(position);
}
});
}
public void playSong(int songIndex) {
mp.reset();
int[] resID = new int[0];
mp = MediaPlayer.create(this, resID[songIndex]);
mp.start();
}
@Override
public void onDestroy() {
super.onDestroy();
mp.release();
}
}
模因类
public class memes{
private String nome;
private int resID;
memes(String nome, int resID){
this.nome = nome;
this.resID = resID;
}
public String getNome(){
return nome;
}
public int getResId(){
return resID;
}
@Override
public String toString(){
return nome;
}
}
最佳答案
代码的问题是,您正在声明一个未填充的单独原始资源数组。
int[] resID = new int[0];
mp = MediaPlayer.create(this, resID[songIndex]);
解决方案
由于使用arraylist填充listview,因此需要从arraylist本身获取资源。解决方案如下:
public class MainActivity extends AppCompatActivity {
ListView lv;
MediaPlayer mp;
ArrayList<Memes> item;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = findViewById(R.id.lv);
mp = new MediaPlayer();
item = new ArrayList<>();
item.add(new Memes("Gemidão", R.raw.gemidaoremix));
item.add(new Memes("Nunca nem vi", R.raw.nuncanemvi));
ArrayAdapter<Memes> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, item);
lv.setAdapter(adapter);
lv.setAdapter(new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, item));
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view,
int position, long id) {
playSong(position);
}
});
}
public void playSong(int songIndex) {
mp.reset();
mp = MediaPlayer.create(this, item.get(songIndex).getResId());
mp.start();
}
@Override
public void onDestroy() {
super.onDestroy();
mp.release();
}
}