flutter热更新安卓端详细教程-附源码-超简单(1)

最新推荐文章于 2024-09-20 21:48:23 发布

2301_82243816

最新推荐文章于 2024-09-20 21:48:23 发布

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分类专栏：程序员文章标签： flutter android

本文链接：https://blog.youkuaiyun.com/2301_82243816/article/details/138826167

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import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import io.flutter.embedding.android.FlutterActivity;
import io.flutter.embedding.engine.FlutterShellArgs;

public class MyFlutterActivity extends FlutterActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//申请权限
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(MyFlutterActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MyFlutterActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
if (ContextCompat.checkSelfPermission(MyFlutterActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MyFlutterActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
}
}
}

@Override
public FlutterShellArgs getFlutterShellArgs() {
copyLibAndWrite(this, “hotlibapp.so”);
FlutterShellArgs supFA = super.getFlutterShellArgs();
File dir = this.getDir(“libs”, Activity.MODE_PRIVATE);
String libPath = dir.getAbsolutePath() + File.separator + “hotlibapp.so”;
File libFile = new File(libPath);
if (libFile.exists()) {
supFA.add(“–aot-shared-library-name=” + libPath); //如果有hotlibapp文件 ,配置进去,没有则作用默认的
}
return supFA;
}

// 作用: 在手机根目录找 hotlibapp.so 文件 , 如果有则复制到 app libs 文件下, 没有则不做操作
public static void copyLibAndWrite(Context context, String fileName) {
try {
String path = Environment.getExternalStorageDirectory().toString();
File destFile2 = new File(path + “/” + fileName);
if (destFile2.exists()) {
File dir = context.getDir(“libs”, Activity.MODE_PRIVATE);
File destFile = new File(dir.getAbsolutePath() + File.separator + fileName);
if (destFile.exists()) {
destFile.delete();
}
destFile.createNewFile();
FileInputStream is = new FileInputStream(destFile2);
FileOutputStream fos = new FileOutputStream(destFile);
byte[] buffer = new byte[is.available()];
int byteCount;
while ((byteCount = is.read(buffer)) != -1) {
fos.write(buffer, 0, byteCount);
}
fos.flush();
is.close();
fos.close();
destFile2.delete(); //复制完后删除这个文件
}
} catch (IOException e) {
}

}
}

原模原样复制进去就行 , 建议用as 打开 , 避免导包出错,代码不用变

打开MainActivity类 , 继承自己写的MyFlutterActivity类

package com.example.HotFlutter;
public class MainActivity extends MyFlutterActivity {
}

在AndroidManifest中添加

并注册我们自己写的类

为了展示效果 , 把main.dart 简化了一下 :

import ‘package:flutter/material.dart’;

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: ‘Flutter Demo’,
home: Scaffold(
body: Center(child: Text(“初始化项目”)),
),
);
}
}

打包: