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[안드로이드] WebView에서 카메라 및 이미지 업로드 (선택적용가능) 본문

안드로이드

[안드로이드] WebView에서 카메라 및 이미지 업로드 (선택적용가능)

http://portfolio.wonpaper.net 2020. 6. 29. 06:57

이번 포스팅은 WebView 방식의 하이브리드 앱 작업시 참으로 중요한 내용이다.

WebView 형식으로 웹과 앱을 혼용하여 작업을 할때 파일업로드 기능은 별도로 앱으로 작업을 해주어야 한다.

 

이번에는 카메라 캡쳐 이미지와 원하는 이미지 파일업로드 (갤러리) 를 선택적으로 고를수 있도록 동시에 작업해본다.

 

[ Android 10 에서 확인함 ] - compileSdkVersion 29

 

[ 실행화면 ]

카메라 촬영 이미지캡처후 파일선택되었다.
업로드하기 버튼 클릭후 업로드된 결과화면

 

[ AndroidManifest.xml ]

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="wonpa.alwaysweb.com.webviewfileupload1">
 
    <uses-permission android:name="android.permission.INTERNET"/>
    <!--네트워크 상태 퍼미션-->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <!-- 카메라 퍼미션 -->
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.CAMERA2" />
    <uses-feature android:name="android.hardware.camera" android:required="true" />
    <!-- 5.0 버전 파일업로드 퍼미션 -->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" android:maxSdkVersion="18"/>
    <!-- 외부 저장소 사용 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
    <!--android os 9 pie 버전부터 "http://" url 사용을 위한 보안설정 필요-->
    <!--android:networkSecurityConfig="@xml/network_security_config" appication 태그에 삽입-->
 
    <!--가로 세로 모드 변경돼도 새로 로딩하지 않도록 함 -->
    <!--android:configChanges="orientation|keyboardHidden|screenSize" appication 태그에 삽입-->
 
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:usesCleartextTraffic="true"
        android:networkSecurityConfig="@xml/network_security_config"
        android:theme="@style/AppTheme">
        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>
        <activity android:name=".MainActivity"
            android:configChanges="orientation|keyboardHidden|screenSize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
 
</manifest>
cs

[ file_paths.xml ] - /res/xml 내

https://stackoverflow.com/ 에서 검색하여 내외부저장소의 다양한 xml 링크주소를 모두 나타내었다.

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<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path
        name="sdcard"
        path="." />
    <external-files-path
        name="external_files"
        path="." />
    <cache-path
        name="cache"
        path="." />
    <external-cache-path
        name="external_cache"
        path="." />
    <files-path
        name="files"
        path="." />
</paths>
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[ network_security_config.xml ] - /res/xml 내

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<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true"/>
</network-security-config>
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[ MainActivity.java ]

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import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.core.content.FileProvider;
 
import android.Manifest;
import android.annotation.TargetApi;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.provider.Settings;
import android.util.Log;
import android.view.KeyEvent;
import android.webkit.JsResult;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
 
import java.io.File;
 
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public class MainActivity extends AppCompatActivity {
 
    private WebView webView1;
    private WebSettings webSettings;
    private long time = 0;
 
    public ValueCallback<Uri> filePathCallbackNormal;
    public ValueCallback<Uri[]> filePathCallbackLollipop;
    public final static int FILECHOOSER_NORMAL_REQ_CODE = 2001;
    public final static int FILECHOOSER_LOLLIPOP_REQ_CODE = 2002;
    private Uri cameraImageUri = null;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        webView1 = (WebView) findViewById(R.id.webView1);
 
        // 각종 권한 획득
        checkVerify();
 
        webSettings = webView1.getSettings();
        webSettings.setJavaScriptEnabled(true);         // 자바스크립트 사용
        webSettings.setSupportMultipleWindows(true);    // 새창 띄우기 허용
        webSettings.setJavaScriptCanOpenWindowsAutomatically(true); // 자바스크립트 새창 띄우기 허용
        webSettings.setLoadWithOverviewMode(true);      // 메타태그 허용
        webSettings.setUseWideViewPort(true);           // 화면 사이즈 맞추기 허용
        webSettings.setSupportZoom(false);              // 화면줌 허용 여부
        webSettings.setBuiltInZoomControls(false);      // 화면 확대 축소 허용 여부
//        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN); // 컨텐츠 사이즈 맞추기
        webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);        // 브라우저 노캐쉬
        webSettings.setDomStorageEnabled(true);                     // 로컬저장소 허용
 
        webView1.loadUrl("http://도메인/app_file/uploadfile.php");
        webView1.setWebChromeClient(new WebChromeClientClass());  //웹뷰에 크롬 사용 허용. 이 부분이 없으면 크롬에서 alert가 뜨지 않음
        webView1.setWebViewClient(new WebViewClientClass());
    }
 
    @Override
    public void onBackPressed() {
        //super.onBackPressed();
        if(System.currentTimeMillis()-time>=2000){
            time=System.currentTimeMillis();
            Toast.makeText(getApplicationContext(),"뒤로 버튼을 한번 더 누르면 종료합니다.",Toast.LENGTH_SHORT).show();
        }else if(System.currentTimeMillis()-time<2000){
            finish();
            return;
        }
    }
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    //권한 획득 여부 확인
    @TargetApi(Build.VERSION_CODES.M)
    public void checkVerify() {
 
        if (ContextCompat.checkSelfPermission(this,Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this,Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED ||
                ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_NETWORK_STATE) != PackageManager.PERMISSION_GRANTED ||
                ContextCompat.checkSelfPermission(this,Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED ||
                ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED ||
                ContextCompat.checkSelfPermission(this,Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
//            Log.d("checkVerify() : ","if문 들어옴");
 
            //카메라 또는 저장공간 권한 획득 여부 확인
            if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) || ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.CAMERA)) {
 
                Toast.makeText(getApplicationContext(),"권한 관련 요청을 허용해 주셔야 카메라 캡처이미지 사용등의 서비스를 이용가능합니다.",Toast.LENGTH_SHORT).show();
 
            } else {
//                Log.d("checkVerify() : ","카메라 및 저장공간 권한 요청");
                // 카메라 및 저장공간 권한 요청
                ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.INTERNET, Manifest.permission.CAMERA,
                        Manifest.permission.ACCESS_NETWORK_STATE,
                        Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
            }
        }
    }
 
    //권한 획득 여부에 따른 결과 반환
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
    {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        //Log.d("onRequestPermissionsResult() : ","들어옴");
 
        if (requestCode == 1)
        {
            if (grantResults.length > 0)
            {
                for (int i=0; i<grantResults.length++i)
                {
                    if (grantResults[i] == PackageManager.PERMISSION_DENIED)
                    {
                        // 카메라, 저장소 중 하나라도 거부한다면 앱실행 불가 메세지 띄움
                        new AlertDialog.Builder(this).setTitle("알림").setMessage("권한을 허용해주셔야 앱을 이용할 수 있습니다.")
                                .setPositiveButton("종료"new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog, int which) {
                                        dialog.dismiss();
                                        finish();
                                    }
                                }).setNegativeButton("권한 설정"new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                dialog.dismiss();
                                Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
                                        .setData(Uri.parse("package:" + getApplicationContext().getPackageName()));
                                getApplicationContext().startActivity(intent);
                            }
                        }).setCancelable(false).show();
 
                        return;
                    }
                }
//                Toast.makeText(this, "Succeed Read/Write external storage !", Toast.LENGTH_SHORT).show();
 
            }
        }
    }
cs
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    //액티비티가 종료될 때 결과를 받고 파일을 전송할 때 사용
    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d("onActivityResult() ","resultCode = " + Integer.toString(requestCode));
 
        switch (requestCode)
        {
            case FILECHOOSER_NORMAL_REQ_CODE:
                if (resultCode == RESULT_OK)
                {
                    if (filePathCallbackNormal == nullreturn;
                    Uri result = (data == null || resultCode != RESULT_OK) ? null : data.getData();
                    //  onReceiveValue 로 파일을 전송한다.
                    filePathCallbackNormal.onReceiveValue(result);
                    filePathCallbackNormal = null;
                }
                break;
            case FILECHOOSER_LOLLIPOP_REQ_CODE:
                Log.d("onActivityResult() ","FILECHOOSER_LOLLIPOP_REQ_CODE = " + Integer.toString(FILECHOOSER_LOLLIPOP_REQ_CODE));
 
                if (resultCode == RESULT_OK)
                {
                    Log.d("onActivityResult() ","FILECHOOSER_LOLLIPOP_REQ_CODE 의 if문  RESULT_OK 안에 들어옴");
 
                    if (filePathCallbackLollipop == nullreturn;
                    if (data == null)
                        data = new Intent();
                    if (data.getData() == null)
                        data.setData(cameraImageUri);
 
                    filePathCallbackLollipop.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
                    filePathCallbackLollipop = null;
                }
                else
                {
                    Log.d("onActivityResult() ","FILECHOOSER_LOLLIPOP_REQ_CODE 의 if문의 else문 안으로~");
                    if (filePathCallbackLollipop != null)
                    {   //  resultCode에 RESULT_OK가 들어오지 않으면 null 처리하지 한다.(이렇게 하지 않으면 다음부터 input 태그를 클릭해도 반응하지 않음)
 
                        Log.d("onActivityResult() ","FILECHOOSER_LOLLIPOP_REQ_CODE 의 if문의 filePathCallbackLollipop이 null이 아니면");
                        filePathCallbackLollipop.onReceiveValue(null);
                        filePathCallbackLollipop = null;
                    }
 
                    if (filePathCallbackNormal != null)
                    {
                        filePathCallbackNormal.onReceiveValue(null);
                        filePathCallbackNormal = null;
                    }
                }
                break;
            default:
 
                break;
        }
 
        super.onActivityResult(requestCode, resultCode, data);
    }
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    // 카메라 기능 구현
    private void runCamera(boolean _isCapture)
    {
        Intent intentCamera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        //intentCamera.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
        //File path = getFilesDir();
        File path = Environment.getExternalStorageDirectory();
        File file = new File(path, "sample.png"); // sample.png 는 카메라로 찍었을 때 저장될 파일명이므로 사용자 마음대로
        // File 객체의 URI 를 얻는다.
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
        {
            String strpa = getApplicationContext().getPackageName();
            cameraImageUri = FileProvider.getUriForFile(this, strpa + ".fileprovider", file);
        }
        else
        {
            cameraImageUri = Uri.fromFile(file);
        }
        intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, cameraImageUri);
 
        if (!_isCapture)
        { // 선택팝업 카메라, 갤러리 둘다 띄우고 싶을 때
 
            Intent pickIntent = new Intent(Intent.ACTION_PICK);
            pickIntent.setType(MediaStore.Images.Media.CONTENT_TYPE);
            pickIntent.setData(MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
 
            String pickTitle = "사진 가져올 방법을 선택하세요.";
            Intent chooserIntent = Intent.createChooser(pickIntent, pickTitle);
 
            // 카메라 intent 포함시키기..
            chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{intentCamera});
            startActivityForResult(chooserIntent, FILECHOOSER_LOLLIPOP_REQ_CODE);
        }
        else
        {// 바로 카메라 실행..
            startActivityForResult(intentCamera, FILECHOOSER_LOLLIPOP_REQ_CODE);
        }
    }
 
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
 
        if ((keyCode==KeyEvent.KEYCODE_BACK) && webView1.canGoBack()) {
            webView1.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
 
cs

Intent chooserIntent = Intent.createChooser(pickIntent, pickTitle); 처럼 chooserIntent 인텐트를 만들고 두개의 인텐트를 동시에 선택하는 화면으로 구성한다.

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    private class WebChromeClientClass extends WebChromeClient {
        // 자바스크립트의 alert창
        @Override
        public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {
            new AlertDialog.Builder(view.getContext())
                    .setTitle("Alert")
                    .setMessage(message)
                    .setPositiveButton(android.R.string.ok,
                            new AlertDialog.OnClickListener(){
                                public void onClick(DialogInterface dialog, int which) {
                                    result.confirm();
                                }
                            })
                    .setCancelable(false)
                    .create()
                    .show();
            return true;
        }
 
        // 자바스크립트의 confirm창
        @Override
        public boolean onJsConfirm(WebView view, String url, String message,
                                   final JsResult result) {
            new AlertDialog.Builder(view.getContext())
                    .setTitle("Confirm")
                    .setMessage(message)
                    .setPositiveButton("Yes",
                            new AlertDialog.OnClickListener(){
                                public void onClick(DialogInterface dialog, int which) {
                                    result.confirm();
                                }
                            })
                    .setNegativeButton("No",
                            new AlertDialog.OnClickListener(){
                                public void onClick(DialogInterface dialog, int which) {
                                    result.cancel();
                                }
                            })
                    .setCancelable(false)
                    .create()
                    .show();
            return true;
        }
 
        // For Android 5.0+ 카메라 - input type="file" 태그를 선택했을 때 반응
        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
        public boolean onShowFileChooser(
                WebView webView, ValueCallback<Uri[]> filePathCallback,
                FileChooserParams fileChooserParams) {
            Log.d("MainActivity - onShowFileChooser""5.0+");
 
            // Callback 초기화 (중요!)
            if (filePathCallbackLollipop != null) {
                filePathCallbackLollipop.onReceiveValue(null);
                filePathCallbackLollipop = null;
            }
            filePathCallbackLollipop = filePathCallback;
 
            boolean isCapture = fileChooserParams.isCaptureEnabled();
 
            Log.d("onShowFileChooser : " , String.valueOf(isCapture));
            runCamera(isCapture);
            return true;
        }
    }
 
    private class WebViewClientClass extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            //Log.d("WebViewClient URL : " , request.getUrl().toString());
            view.loadUrl(request.getUrl().toString());
            return true;
            //return super.shouldOverrideUrlLoading(view, request);
        }
    }
}
cs

 

[ activity_main.xml ]

 

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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
 
    <WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
 
</androidx.constraintlayout.widget.ConstraintLayout>
cs

 

 

참고페이지 : https://minasb.tistory.com/28

 

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