在获取手机电量,屏幕信息等,都需要flutter 调用原生实现,这部分flutter 官方已经帮我们实现好了,对于部分功能,需要自己实现, 步骤如下
# 创建一个 flutter 应用,使用 as 打开 android 目录, MainActivity 代码如下
package com.example.flutter_app;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import java.util.Map;
import io.flutter.app.FlutterActivity;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugins.GeneratedPluginRegistrant;
public class MainActivity extends FlutterActivity {
private static final String CHANNEL = "demo.gawkat.com/info";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GeneratedPluginRegistrant.registerWith(this);
new MethodChannel(getFlutterView(), CHANNEL).setMethodCallHandler(new MethodChannel.MethodCallHandler() {
@Override
public void onMethodCall(MethodCall methodCall, MethodChannel.Result result) {
final Map<String, Object> arguments = methodCall.arguments();
if (methodCall.method.equals("getMessage")) {
result.success("Android say hi."+ ((String) arguments.get("from")));
}
// openWebPage("http://www.bitying.com");
}
});
}
public void openWebPage(String url) {
Uri webpage = Uri.parse(url);
Intent intent = new Intent(Intent.ACTION_VIEW, webpage);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
}
}
}
# ios 端 appDelegate.m
#include "AppDelegate.h"
#include "GeneratedPluginRegistrant.h"
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[GeneratedPluginRegistrant registerWithRegistry:self];
// Override point for customization after application launch.
FlutterViewController* controller = (FlutterViewController*)self.window.rootViewController;
FlutterMethodChannel* channel = [FlutterMethodChannel
methodChannelWithName:@"demo.gawkat.com/info"
binaryMessenger:controller
];
[channel setMethodCallHandler:^(FlutterMethodCall* call, FlutterResult result) {
NSString *from = call.arguments[@"from"];
if([@"getMessage" isEqualToString:call.method]) {
NSString *messgae = @"IOS says greetings";
NSString *returnMessage = [messgae stringByAppendingString:from];
result(returnMessage);
}
}];
return [super application:application didFinishLaunchingWithOptions:launchOptions];
}
@end
# flutter 端 main.dart 编写如下代码
static const platform = const MethodChannel('demo.gawkat.com/info');
String _message = 'No message yet...';
Future<String> _getMessage() async {
var sendMap = <String, dynamic> {
'from' : 'boy',
};
String value;
try {
value = await platform.invokeMethod('getMessage', sendMap);
} catch(e) {
print(e);
}
return value;
}