使用 button.getTag().toString() 导致应用程序崩溃。据我所知我需要一个 setTag() 之前 getTag() 但我不知道什么时候，怎么在这段代码中使用它！
主要内容：

public class MainActivity extends AppCompatActivity {

    public void play(View view){
        Button buttonPressed = (Button) view;
        Log.i("Button pressed", buttonPressed.getTag().toString()); //this line is causing error
        MediaPlayer mediaPlayer = MediaPlayer.create(this, getResources().getIdentifier(buttonPressed.getTag().toString(), "raw", getPackageName()));
        mediaPlayer.start();
    }

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

    }

xml格式：

<androidx.gridlayout.widget.GridLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:columnCount="2"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:rowCount="4">

    <Button
        android:id="@+id/hi"
        android:onClick="play"
        android:text="HI"
        app:layout_columnWeight="1"
        app:layout_gravity="fill"
        app:layout_rowWeight="1" />