相关文章推荐
小百科  ›  Amazon Simple Storage Service(S3)在Android端的部署
s3 aws amplify
迷茫的鸵鸟
1 年前

还有比较方便的一点是它可以通过各种方式进行访问，包括在网页上直接拖拽、Python、Android等方式都是可以的。本文就记录一下自己在Android平台上设置S3并上传文件的过程。

需要选择国际版AWS（支持Amplify自动搭建操作），国内的版本虽然有S3但是搭建方式比较复杂。每个账户是可以免费试用一年的，需要有支持美元付款的信用卡。

参考官方教程
https://aws-amplify.github.io/docs/android/start?ref=amplify-android-btn
首先安装Amplify，它可以理解成自动搭建的脚本（类似于Gradle？），通过简单的几个设置就能搭出所需要的功能。（下面的内容上述网址均有）
首先安装 Node.js® ，然后打开cmd安装Amplify 

$ npm install -g @aws-amplify/cli
$ amplify configure

这里的amplify configure主要涉及到账号登陆，并新建了一个Android工程专用的IAM账号，默认是具有Administrator权限的，后续如果APP需要发布的话，需要手动在IAM控制台中将其权限调整为所需的范围。

然后我们开始安卓工程相关的设置。


Android工程设置


跟着官方文档https://aws-amplify.github.io/docs/android/start?ref=amplify-android-btn一直做到Step 3

后面的Step 4的API是一个Demo功能，只用S3的话是不需要的。


Storage 设定/ Step 1 添加验证


先阅读官方文档 https://aws-amplify.github.io/docs/android/storage

首先要添加验证，参考https://aws-amplify.github.io/docs/android/authentication

这里简单起见，我们就直接使用匿名身份上传了。关于Authentication这一部分的内容在后续的博客会有提到。

注意Guest用户也要选read/write

amplify push就会发现awsconfiguration.json里面多了和S3储存桶相关的一些信息，同时会自动新建一个S3储存桶。

（可在https://s3.console.aws.amazon.com/s3/home查看）

    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.administrator.anothers3uploadtest"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
dependencies {
    //Base SDK
    implementation 'com.amazonaws:aws-android-sdk-core:2.12.+'
    //For AWSMobileClient only:
    implementation 'com.amazonaws:aws-android-sdk-mobile-client:2.12.+'
    //Storage
    implementation 'com.amazonaws:aws-android-sdk-s3:2.12.+'
    implementation ('com.amazonaws:aws-android-sdk-mobile-client:2.12.+@aar') { transitive = true }
    implementation ('com.amazonaws:aws-android-sdk-auth-userpools:2.12.+@aar') { transitive = true }
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

project:build.gradle


// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        jcenter()
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.1'
        //appsync
        classpath 'com.amazonaws:aws-android-sdk-appsync-gradle-plugin:2.7.+'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
allprojects {
    repositories {
        google()
        jcenter()
task clean(type: Delete) {
    delete rootProject.buildDir

MainActivity.java


package com.example.administrator.anothers3uploadtest;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.amazonaws.mobile.client.AWSMobileClient;
import com.amazonaws.mobile.client.Callback;
import com.amazonaws.mobile.client.UserStateDetails;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferListener;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferObserver;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferService;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferState;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferUtility;
import com.amazonaws.services.s3.AmazonS3Client;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        AWSMobileClient.getInstance().initialize(getApplicationContext(), new Callback<UserStateDetails>() {
            @Override
            public void onResult(UserStateDetails userStateDetails) {
                switch (userStateDetails.getUserState()){
                    case SIGNED_IN:
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                TextView textView = (TextView) findViewById(R.id.text);
                                textView.setText("Logged IN");
                        break;
                    case SIGNED_OUT:
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                TextView textView = (TextView) findViewById(R.id.text);
                                textView.setText("Logged OUT");
                        break;
                    default:
                        AWSMobileClient.getInstance().signOut();
                        break;
            @Override
            public void onError(Exception e) {
                Log.e("INIT", e.toString());
        getApplicationContext().startService(new Intent(getApplicationContext(), TransferService.class));
        ((Button)findViewById(R.id.save_button)).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                saveToFile(String.valueOf(((TextView)findViewById(R.id.inputText)).getText()));
        ((Button)findViewById(R.id.upLoadButton)).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                uploadWithTransferUtility();
    public void saveToFile(String inputText){
        FileOutputStream out=null;
        BufferedWriter writer = null;
            out = openFileOutput("data.txt", Context.MODE_PRIVATE);
            writer = new BufferedWriter(new OutputStreamWriter(out));
            writer.write(inputText);
        }catch (IOException e){
            e.printStackTrace();
        }finally {
                    if(writer!=null)
                        writer.close();
                }catch (IOException e){
                    e.printStackTrace();
    public void uploadWithTransferUtility() {
        TransferUtility transferUtility =
                TransferUtility.builder()
                        .context(getApplicationContext())
                        .awsConfiguration(AWSMobileClient.getInstance().getConfiguration())
                        .s3Client(new AmazonS3Client(AWSMobileClient.getInstance()))
                        .build();
        TransferObserver uploadObserver =
                transferUtility.upload(
                        "data.txt",
                        new File(getFilesDir()+"/data.txt"));
        // Attach a listener to the observer to get state update and progress notifications
        uploadObserver.setTransferListener(new TransferListener() {
            @Override
            public void onStateChanged(int id, TransferState state) {
                if (TransferState.COMPLETED == state) {
                    // Handle a completed upload.
            @Override
            public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {
                float percentDonef = ((float) bytesCurrent / (float) bytesTotal) * 100;
                int percentDone = (int)percentDonef;
                Log.d("YourActivity", "ID:" + id + " bytesCurrent: " + bytesCurrent
                        + " bytesTotal: " + bytesTotal + " " + percentDone + "%");
            @Override
            public void onError(int id, final Exception ex) {
                // Handle errors
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        TextView textView = (TextView) findViewById(R.id.text);
                        textView.setText("Error"+ex);
        // If you prefer to poll for the data, instead of attaching a
        // listener, check for the state and progress in the observer.
        if (TransferState.COMPLETED == uploadObserver.getState()) {
            // Handle a completed upload.
        Log.d("YourActivity", "Bytes Transferred: " + uploadObserver.getBytesTransferred());
        Log.d("YourActivity", "Bytes Total: " + uploadObserver.getBytesTotal());

这里会报错权限问题，我找了很久问题在哪…


com.amazonaws.services.s3.model.AmazonS3Exception: Access Denied (Service: Amazon S3; Status Code: 403; Error Code: AccessDenied; Request ID: *********************), S3 Extended Request ID: ********************************************************************************************************************

这里我参考了https://github.com/awslabs/aws-sdk-android-samples/tree/master/S3TransferUtilitySample

发现是可以手动配置的，我就是在手动配置之后偶然发现居然成功了？

最后发现原来是自动配置的Unauthorized Role的权限仍然不足，需要手动加上S3完全的权限。
 
推荐文章
今天看啥   ·   Py中国   ·   codingpro   ·   小百科   ·   link之家   ·   卧龙AI搜索
删除内容请联系邮箱 2879853325@qq.com
小百科 - 百科知识指南
© 2024 ~ 沪ICP备11025650号