修改退出流程

app/build.gradle

@@ -37,6 +37,6 @@ android {
 dependencies {
     implementation fileTree(include: ['*.jar','*.aar'], dir: 'libs')
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'org.greenrobot:eventbus:3.2.0'
     implementation 'com.android.volley:volley:1.1.1'
+    implementation 'org.greenrobot:eventbus:3.2.0'
 }

app/src/main/java/com/hnjc/wjtx/MainActivity.java

@@ -111,9 +111,11 @@ public class MainActivity extends Activity {
                     finish();
                 }
             });
+            return true;
+        } else {
+            return super.onKeyDown(keyCode, keyEvent);
         }
 
-        return super.onKeyDown(keyCode, keyEvent);
     }
 
     private void setExternalInterfaces() {