js implements the interface to send messages to the native interface and jump to the function

public class TestActivity extends AppCompatActivity {
 
  private Button mBtGoBack;
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test);
    mBtGoBack = (Button) findViewById(R.id.bt_go_back);
    mBtGoBack.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        finish();
      }
    });
 
  }
}

public class ExampleInterface extends ReactContextBaseJavaModule {
 
  private ReactApplicationContext mRApplicationContext;
 
  public ExampleInterface(ReactApplicationContext reactContext) {
    super(reactContext);
    mRApplicationContext = reactContext;
  }
 
  //RN使用这个名称来调用原生模块的其他函数
  @Override
  public String getName() {
    return "ExampleInterface";
  }
  //必须写@ReactMethod，将其注册为能够被React调用的函数
  @ReactMethod
  public void HandlerMessage(String aMessage){
    Log.d("lt","====receive message from RN==="+aMessage);
     //这部分实现简单的跳转
    Intent intent = new Intent(mRApplicationContext,TestActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    mRApplicationContext.startActivity(intent);
  }
 
}

public class AnExampleReactPackage implements ReactPackage {
 
  @Override
  public List<NativeModule> createNativeModules(ReactApplicationContext reactApplicationContext) {
    List<NativeModule> modules = new ArrayList<>();
    modules.add(new ExampleInterface(reactApplicationContext));
    return modules;
  }
 
  @Override
  public List<Class<? extends JavaScriptModule>> createJSModules() {
    return Collections.emptyList();
  }
 
  @Override
  public List<ViewManager> createViewManagers(ReactApplicationContext reactApplicationContext) {
    return Collections.emptyList();
  }
}

@Override
 protected List<ReactPackage> getPackages() {
  return Arrays.<ReactPackage>asList(
    new MainReactPackage(),
    new AnExampleReactPackage()
  );
 }

buttonPress:function(){
  NativeModules.ExampleInterface.HandlerMessage('test');
  }