如何在 class 扩展应用程序或 ReactContextBaseJavaModule 中获取 Activity?
How to get Activity within a class extending Application or ReactContextBaseJavaModule?
如何在 MainApplication 中获取并注入 activity?我有一个外部库,需要我将 activity 作为参数传递。 建议我在需要当前 activity 的部分使用 getCurrentActivity() 方法,但它已从 ReactContextBaseJavaModule class 中删除。还有其他方法吗?如何在下面代码中使用 'this' 关键字的地方传递 activity?谢谢..
package com.bluetoothioexample;
import android.app.Application;
import android.util.Log;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.ReactApplication;
import com.facebook.react.ReactInstanceManager;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import java.util.Arrays;
import java.util.List;
import com.subsite.bluetoothio.BluetoothIOPackage;
import com.oblador.vectoricons.VectorIconsPackage;
public class MainApplication extends Application implements ReactApplication {
private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
@Override
protected boolean getUseDeveloperSupport() {
return BuildConfig.DEBUG;
}
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(),
new BluetoothIOPackage(this), //<- How pass the activity
// from ReactApplication ?
new VectorIconsPackage()
);
}
};
@Override
public ReactNativeHost getReactNativeHost() {
return mReactNativeHost;
}
}
我不喜欢 React-Native 但有一个简单的技巧
public class MainApplication extends Application implements Application.ActivityLifecycleCallbacks{
@Override
public void onCreate() {
super.onCreate();
registerActivityLifecycleCallbacks(this);
}
private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
@Override
protected boolean getUseDeveloperSupport() {
return BuildConfig.DEBUG;
}
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(),
new BluetoothIOPackage(mCurrentActivity), //
// from ReactApplication ?
new VectorIconsPackage()
);
}
};
private Activity mCurrentActivity;
@Override
public ReactNativeHost getReactNativeHost() {
return mReactNativeHost;
}
@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
mCurrentActivity = activity;
}
您需要实现 Application.ActivityLifecycleCallbacks
并注册生命周期回调 registerActivityLifecycleCallbacks(this);
并等待 activity 创建以获取当前引用。
如何在 MainApplication 中获取并注入 activity?我有一个外部库,需要我将 activity 作为参数传递。
package com.bluetoothioexample;
import android.app.Application;
import android.util.Log;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.ReactApplication;
import com.facebook.react.ReactInstanceManager;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import java.util.Arrays;
import java.util.List;
import com.subsite.bluetoothio.BluetoothIOPackage;
import com.oblador.vectoricons.VectorIconsPackage;
public class MainApplication extends Application implements ReactApplication {
private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
@Override
protected boolean getUseDeveloperSupport() {
return BuildConfig.DEBUG;
}
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(),
new BluetoothIOPackage(this), //<- How pass the activity
// from ReactApplication ?
new VectorIconsPackage()
);
}
};
@Override
public ReactNativeHost getReactNativeHost() {
return mReactNativeHost;
}
}
我不喜欢 React-Native 但有一个简单的技巧
public class MainApplication extends Application implements Application.ActivityLifecycleCallbacks{
@Override
public void onCreate() {
super.onCreate();
registerActivityLifecycleCallbacks(this);
}
private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
@Override
protected boolean getUseDeveloperSupport() {
return BuildConfig.DEBUG;
}
@Override
protected List<ReactPackage> getPackages() {
return Arrays.<ReactPackage>asList(
new MainReactPackage(),
new BluetoothIOPackage(mCurrentActivity), //
// from ReactApplication ?
new VectorIconsPackage()
);
}
};
private Activity mCurrentActivity;
@Override
public ReactNativeHost getReactNativeHost() {
return mReactNativeHost;
}
@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
mCurrentActivity = activity;
}
您需要实现 Application.ActivityLifecycleCallbacks
并注册生命周期回调 registerActivityLifecycleCallbacks(this);
并等待 activity 创建以获取当前引用。