更新 src/main/java/com/hnucm/music/MainActivity.java

src/main/java/com/hnucm/music/MainActivity.java

@@ -28,6 +28,7 @@ public class MainActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        //test
         ImageView imageView = findViewById(R.id.imageView);
         findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
             @Override