我有flutter模块使用image-picker和file-picker插件，在flutter应用程序上它可以正常工作，但是当将flutter模块添加到现有的android系统中时，选择文件或图片时不会返回任何内容。 我创建了一个flutterview来向Android应用添加模块
我在图像选择器和文件选择器上发现了这段代码，这意味着它无法将文件返回到flutterView仅适用于FlutterActivity
public static void registerWith(PluginRegistry.Registrar registrar) {
if (registrar.activity() == null) {
// If a background flutter view tries to register the plugin, there will be no activity from the registrar,
// we stop the registering process immediately because the ImagePicker requires an activity.
return;
}
ImagePickerCache.setUpWithActivity(registrar.activity());
final MethodChannel channel = new MethodChannel(registrar.messenger(), CHANNEL);
final File externalFilesDirectory =
registrar.activity().getExternalFilesDir(Environment.DIRECTORY_PICTURES);
final ExifDataCopier exifDataCopier = new ExifDataCopier();
final ImageResizer imageResizer = new ImageResizer(externalFilesDirectory, exifDataCopier);
final ImagePickerDelegate delegate =
new ImagePickerDelegate(registrar.activity(), externalFilesDirectory, imageResizer);
registrar.addActivityResultListener(delegate);
registrar.addRequestPermissionsResultListener(delegate);
final ImagePickerPlugin instance = new ImagePickerPlugin(registrar, delegate);
channel.setMethodCallHandler(instance);
}
//---
File FlutterFgragment.java
package io.flutter.facade;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugins.GeneratedPluginRegistrant;
import io.flutter.view.FlutterView;
public class FlutterFragment extends Fragment {
private static final String CHANNEL = "hues.dev/getaccount"; // OTL
public static final String ARG_ROUTE = "route";
private String mRoute = "/";
public FlutterView flutterView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mRoute = getArguments().getString(ARG_ROUTE);
}
}
@Override
public void onInflate(Context context, AttributeSet attrs, Bundle savedInstanceState) {
super.onInflate(context, attrs, savedInstanceState);
}
@Override
public FlutterView onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
flutterView = Flutter.createView(getActivity(), getLifecycle(), mRoute);
GeneratedPluginRegistrant.registerWith(flutterView.getPluginRegistry());
return flutterView;
}
@Override public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (!flutterView.getPluginRegistry().onActivityResult(requestCode, resultCode, data)) {
// The plugin registry's onActivityResult handler returns a boolean, so if the intent wasn't meant for a Flutter plugin you can handle it here
super.onActivityResult(requestCode, resultCode, data);
}
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
public void callMethodChannel(String argValue) {
new MethodChannel((FlutterView) getView(), CHANNEL).invokeMethod("getToken", argValue);
}
}
-----------------
//File Flutter.java
package io.flutter.facade;
import android.app.Activity;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LifecycleObserver;
import androidx.lifecycle.OnLifecycleEvent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.NonNull;
import io.flutter.plugin.common.BasicMessageChannel;
import io.flutter.plugin.common.StringCodec;
import io.flutter.view.FlutterMain;
import io.flutter.view.FlutterNativeView;
import io.flutter.view.FlutterRunArguments;
import io.flutter.view.FlutterView;
import io.flutter.plugins.GeneratedPluginRegistrant;
/**
* Main entry point for using Flutter in Android applications.
*
* <p><strong>Warning:</strong> This file is auto-generated by Flutter tooling.
* DO NOT EDIT.</p>
*/
public final class Flutter {
private Flutter() {
// to prevent instantiation
}
/**
* Initiates the Dart VM. Calling this method at an early point may help decreasing time to first
* frame for a subsequently created {@link FlutterView}.
*
* @param applicationContext the application's {@link Context}
*/
public static void startInitialization(@NonNull Context applicationContext) {
FlutterMain.startInitialization(applicationContext);
}
/**
* Creates a {@link FlutterFragment} managing a {@link FlutterView}. The optional
* initial route string will be made available to the Dart code
* (via {@code window.defaultRouteName}) and may be used to determine which widget
* should be displayed in the view. The default initialRoute is "/".
*
* @param initialRoute an initial route {@link String}, or null
* @return a {@link FlutterFragment}
*/
@NonNull
public static FlutterFragment createFragment(String initialRoute) {
final FlutterFragment fragment = new FlutterFragment();
final Bundle args = new Bundle();
args.putString(FlutterFragment.ARG_ROUTE, initialRoute);
fragment.setArguments(args);
return fragment;
}
/**
* Creates a {@link FlutterView} linked to the specified {@link Activity} and {@link Lifecycle}.
* The optional initial route string will be made available to the Dart code (via
* {@code window.defaultRouteName}) and may be used to determine which widget should be displayed
* in the view. The default initialRoute is "/".
*
* @param activity an {@link Activity}
* @param lifecycle a {@link Lifecycle}
* @param initialRoute an initial route {@link String}, or null
* @return a {@link FlutterView}
*/
@NonNull
public static FlutterView createView(@NonNull final Activity activity, @NonNull final Lifecycle lifecycle, final String initialRoute) {
FlutterMain.startInitialization(activity.getApplicationContext());
FlutterMain.ensureInitializationComplete(activity.getApplicationContext(), null);
final FlutterNativeView nativeView = new FlutterNativeView(activity);
final FlutterView flutterView = new FlutterView(activity, null, nativeView) {
private final BasicMessageChannel<String> lifecycleMessages = new BasicMessageChannel<>(this, "flutter/lifecycle", StringCodec.INSTANCE);
@Override
public void onFirstFrame() {
super.onFirstFrame();
setAlpha(1.0f);
}
@Override
public void onPostResume() {
// Overriding default behavior to avoid dictating system UI via PlatformPlugin.
lifecycleMessages.send("AppLifecycleState.resumed");
}
};
if (initialRoute != null) {
flutterView.setInitialRoute(initialRoute);
}
lifecycle.addObserver(new LifecycleObserver() {
@OnLifecycleEvent(Lifecycle.Event.ON_CREATE)
public void onCreate() {
final FlutterRunArguments arguments = new FlutterRunArguments();
arguments.bundlePath = FlutterMain.findAppBundlePath(activity.getApplicationContext());
arguments.entrypoint = "main";
flutterView.runFromBundle(arguments);
}
@OnLifecycleEvent(Lifecycle.Event.ON_START)
public void onStart() {
flutterView.onStart();
}
@OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
public void onResume() {
flutterView.onPostResume();
}
@OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
public void onPause() {
flutterView.onPause();
}
@OnLifecycleEvent(Lifecycle.Event.ON_STOP)
public void onStop() {
flutterView.onStop();
}
@OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
public void onDestroy() {
flutterView.destroy();
}
});
flutterView.setAlpha(0.0f);
return flutterView;
}
}
我该如何使用flutterView插件
答案 0 :(得分：0)
您需要在添加了onActivityResult的活动中添加flutterview。
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
flutterView.onActivityResult(requestCode, resultCode, data);
}