小编Aht*_*hah的帖子

我正在使用 react-native，目前开始使用 redux 并创建了一个应用程序，但是当我在模拟器上运行该应用程序时，它运行良好。然后我通过 USB 将我的手机与 android 6 连接，它也在工作。但是在 Android 8 的其他设备中它不起作用然后我将 targetSdkVersion 更改为 28 然后它也不起作用我不明白是什么问题。

以下是我的 package.json

{
  "name": "Demo",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "react": "16.6.3",
    "react-native": "^0.57.8",
    "react-native-flash-message": "^0.1.10",
    "react-native-linear-gradient": "^2.5.3",
    "react-native-modal-datetime-picker": "^6.0.0",
    "react-native-navigation": "^2.8.0",
    "react-native-tab-view": "^1.3.2",
    "react-native-vector-icons": "^6.2.0",
    "react-redux": "^6.0.1",
    "redux": "^4.0.1",
    "redux-thunk": "^2.3.0"
  },
  "devDependencies": {
    "babel-core": "^7.0.0-bridge.0",
    "babel-jest": "24.0.0",
    "jest": "24.0.0",
    "metro-react-native-babel-preset": "0.51.1",
    "react-test-renderer": "16.6.3"
  },
  "jest": {
    "preset": "react-native"
  }
}

android/build.gradle

buildscript …

我正在使用react-native-modal-datetime-picker库来获取用户的时间。但我正在获得完整日期的时间，我应该如何从中获得时间。以下是我获取时间的代码。

    _showDateTimePicker = () => this.setState({ isDateTimePickerVisible: true });

            _hideDateTimePicker = () => this.setState({ isDateTimePickerVisible: false });

            _handleDatePicked = (time) => {
                console.log('A time has been picked: ', time);
                this._hideDateTimePicker();
            };

                <DateTimePicker
                    isVisible={this.state.isDateTimePickerVisible}
                    onConfirm={this._handleDatePicked}
                    onCancel={this._hideDateTimePicker}
                    mode='time'
                />

我的屏幕上出现了 timePicker，但在选择时间后，它显示了包含所选时间的完整日期，但我只想要时间
我得到的输出是，

A time has been picked:  Tue Feb 05 2019 12:25:00 GMT+0530 (India Standard Time)