(webview)捕获的图像保存在某些android版本中不起作用

fxnxkyjh  于 2021-07-08  发布在  Java
关注(0)|答案(0)|浏览(338)

我正在做一个webview应用程序。我在我的网站上有一个表格和一个图像上传过程是通过表格需要的。它在一些android版本上运行良好：我按file input，打开相机/多媒体资料并上传图片。在某些版本中，它将intent值返回为null（在onactivityresult中），并直接打开库而不打开相机。版本不工作（我不知道所有）：安卓10，安卓7。运行版本：android9，android5。我只是一个后端网络开发人员，我不太擅长移动编程。如果我删除以下条件：“if（takePictureContent.resolveactivity（ucunco\u ekran.this.getpackagemanager（））！=null）“相机已打开，但我拍摄的图像不会进入文件输入（但它保存在gallery中）。

  1. import android.Manifest;
  2. import android.annotation.SuppressLint;
  3. import android.app.Activity;
  4. import android.app.AlertDialog;
  5. import android.content.Context;
  6. import android.content.DialogInterface;
  7. import android.content.Intent;
  8. import android.content.pm.ApplicationInfo;
  9. import android.content.pm.PackageManager;
  10. import android.content.res.Configuration;
  11. import android.net.ConnectivityManager;
  12. import android.net.Uri;
  13. import android.os.Build;
  14. import android.os.Bundle;
  15. import android.os.Environment;
  16. import android.provider.MediaStore;
  17. import android.util.Log;
  18. import android.view.KeyEvent;
  19. import android.view.View;
  20. import android.webkit.ValueCallback;
  21. import android.webkit.WebChromeClient;
  22. import android.webkit.WebSettings;
  23. import android.webkit.WebView;
  24. import android.webkit.WebViewClient;
  25. import android.widget.Button;
  26. import android.widget.Toast;
  28. import androidx.annotation.NonNull;
  29. import androidx.appcompat.app.AppCompatActivity;
  30. import androidx.core.app.ActivityCompat;
  31. import androidx.core.content.ContextCompat;
  33. import java.io.File;
  34. import java.io.IOException;
  35. import java.text.SimpleDateFormat;
  36. import java.util.Date;
  37. import java.util.List;
  39. public class Ucuncu_ekran extends AppCompatActivity{
  40.     WebView webView;
  41.     private static final String TAG = Ucuncu_ekran.class.getSimpleName();
  42.     private String mCM;
  43.     private ValueCallback<Uri> mUM;
  44.     private ValueCallback<Uri[]> mUMA;
  45.     private final static int FCR=1;
  47.     @Override
  48.     protected void onActivityResult(int requestCode, int resultCode, Intent intent){
  50.         super.onActivityResult(requestCode, resultCode, intent);
  51.         if(Build.VERSION.SDK_INT >= 21){
  52.             Uri[] results = null;
  53.             //Check if response is positive
  54.             if(resultCode== Activity.RESULT_OK){
  55.                 if(requestCode == FCR){
  56.                     if(null == mUMA){
  57.                         return;
  58.                     }
  59.                     if(intent == null){
  60.                         //camera selected
  61.                         //Capture Photo if no image available
  62.                         if(mCM != null){
  63.                             results = new Uri[]{Uri.parse(mCM)};
  64.                         }
  65.                     }else{
  66.                         //gallery selected
  67.                         String dataString = intent.getDataString();
  68.                         if(dataString != null){
  69.                             results = new Uri[]{Uri.parse(dataString)};
  70.                         }
  71.                     }
  72.                 }
  73.             }
  74.             mUMA.onReceiveValue(results);
  75.             mUMA = null;
  76.         }else{
  77.             if(requestCode == FCR){
  78.                 if(null == mUM) return;
  79.                 Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
  80.                 mUM.onReceiveValue(result);
  81.                 mUM = null;
  82.             }
  83.         }
  84.     }
  86.     AlertDialog.Builder builder;
  87.     String test = "";
  88.     Button closeButton;
  90.     @SuppressLint({"SetJavaScriptEnabled", "WrongViewCast"})
  91.     @Override
  92.     protected void onCreate(Bundle savedInstanceState){/*
  93.         requestWindowFeature(Window.FEATURE_NO_TITLE);
  94.         this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
  95.         getSupportActionBar().hide();*/
  97.         boolean b = uygulamaYukluMu("com.android.camera");
  98.         super.onCreate(savedInstanceState);
  99.         setContentView(R.layout.activity_ucuncu_ekran);
  101. /*
  102.         closeButton = (Button) findViewById(R.id.button);
  103.         builder = new AlertDialog.Builder(this);*/
  105.         if(Build.VERSION.SDK_INT >=23 && (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)) {
  106.             ActivityCompat.requestPermissions(Ucuncu_ekran.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, 1);
  107.         }
  109.         webView = (WebView) findViewById(R.id.webView2);
  110.         assert webView != null;
  111.         WebSettings webSettings = webView.getSettings();
  112.         webSettings.setJavaScriptEnabled(true);
  113.         webSettings.setAllowFileAccess(true);
  115.         if(Build.VERSION.SDK_INT >= 21){
  116.             webSettings.setMixedContentMode(0);
  117.             webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
  118.         }else if(Build.VERSION.SDK_INT >= 19){
  119.             webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
  120.         }else if(Build.VERSION.SDK_INT < 19){
  121.             webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
  122.         }
  123.         webView.setWebViewClient(new Callback());
  124.         webView.loadUrl("https://mywebsite.com/");
  125.         webView.setWebChromeClient(new WebChromeClient(){
  126.             //For Android 3.0+
  127.             public void openFileChooser(ValueCallback<Uri> uploadMsg){
  128.                 mUM = uploadMsg;
  129.                 Intent i = new Intent(Intent.ACTION_GET_CONTENT);
  130.                 i.addCategory(Intent.CATEGORY_OPENABLE);
  131.                 i.setType("*/*");
  132.                 Ucuncu_ekran.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FCR);
  133.             }
  134.             // For Android 3.0+, above method not supported in some android 3+ versions, in such case we use this
  135.             public void openFileChooser(ValueCallback uploadMsg, String acceptType){
  136.                 mUM = uploadMsg;
  137.                 Intent i = new Intent(Intent.ACTION_GET_CONTENT);
  138.                 i.addCategory(Intent.CATEGORY_OPENABLE);
  139.                 i.setType("*/*");
  140.                 Ucuncu_ekran.this.startActivityForResult(
  141.                         Intent.createChooser(i, "File Browser"),
  142.                         FCR);
  143.             }
  144.             //For Android 4.1+
  145.             public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
  146.                 mUM = uploadMsg;
  147.                 Intent i = new Intent(Intent.ACTION_GET_CONTENT);
  148.                 i.addCategory(Intent.CATEGORY_OPENABLE);
  149.                 i.setType("*/*");
  150.                 Ucuncu_ekran.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), Ucuncu_ekran.FCR);
  151.             }
  152.             //For Android 5.0+
  153.             @SuppressLint("QueryPermissionsNeeded")
  154.             public boolean onShowFileChooser(
  155.                     WebView webView, ValueCallback<Uri[]> filePathCallback,
  156.                     FileChooserParams fileChooserParams){
  157.                 if(mUMA != null){
  158.                     mUMA.onReceiveValue(null);
  159.                 }
  160.                 mUMA = filePathCallback;
  161.                 Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
  162.                 if(takePictureIntent.resolveActivity(Ucuncu_ekran.this.getPackageManager()) != null){
  163.                     File photoFile = null;
  164.                     try{
  165.                         photoFile = createImageFile();
  167.                         takePictureIntent.putExtra("PhotoPath", mCM);
  168.                     }catch(IOException ex){
  169.                         Log.e(TAG, "Failed create image", ex);
  170.                     }
  171.                     if(photoFile != null){
  172.                         mCM = "file:" + photoFile.getAbsolutePath();
  173.                        takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
  174.                     }else{
  175.                         takePictureIntent = null;
  176.                     }
  177.                 }
  178.                 Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
  179.                 contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
  180.                 contentSelectionIntent.setType("*/*");
  181.                 Intent[] intentArray;
  182.                 if(takePictureIntent != null){
  183.                     intentArray = new Intent[]{takePictureIntent};
  184.                 }else{
  185.                     intentArray = new Intent[0];
  186.                 }
  188.                 Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
  189.                 chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
  190.                 chooserIntent.putExtra(Intent.EXTRA_TITLE, "Select an action");
  191.                 chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
  192.                 startActivityForResult(chooserIntent, FCR);
  193.                 return true;
  194.             }
  196.         });
  197.     }
  198.     public class Callback extends WebViewClient{
  199.         public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){
  200.             Toast.makeText(getApplicationContext(), "Failed loading app!", Toast.LENGTH_SHORT).show();
  201.         }
  202.     }
  204.     // Create an image file
  205.     private File createImageFile() throws IOException{
  206.         @SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
  207.         String imageFileName = "img_"+timeStamp+"_";
  208.         File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
  209.         return File.createTempFile(imageFileName,".jpg",storageDir);
  210.     }
  212.     @Override
  213.     public boolean onKeyDown(int keyCode, @NonNull KeyEvent event){
  214.         if(event.getAction() == KeyEvent.ACTION_DOWN){
  215.             switch(keyCode){
  216.                 case KeyEvent.KEYCODE_BACK:
  217.                     if(webView.canGoBack()){
  218.                         webView.goBack();
  219.                     }else{
  220.                         finish();
  221.                     }
  222.                     return true;
  223.             }
  224.         }
  225.         return super.onKeyDown(keyCode, event);
  226.     }
  228.     @Override
  229.     public void onConfigurationChanged(Configuration newConfig){
  230.         super.onConfigurationChanged(newConfig);
  231.     }
  233.     @Override
  234.     public void onBackPressed() {
  235.         if (webView.canGoBack()) {
  236.             webView.goBack();
  237.         }
  238.         else {
  239.             AlertDialog.Builder builder = new AlertDialog.Builder(this);
  240.             builder.setTitle("Exit app");
  241.             builder.setMessage("Are you sure?");
  242.             builder.setPositiveButton("No", new DialogInterface.OnClickListener() {
  243.                 public void onClick(DialogInterface dialog, int id) {
  244.                 }
  245.             });
  246.             builder.setNegativeButton("Yes", new DialogInterface.OnClickListener() {
  247.                 public void onClick(DialogInterface dialog, int id) {
  248.                     Ucuncu_ekran.super.onBackPressed();
  249.                 }
  250.             });
  251.             builder.show();
  253.             //super.onBackPressed();
  254.         }
  255.     }
  256.     public boolean InternetKontrol() {
  257.         ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
  258.         if (manager.getActiveNetworkInfo() != null && manager.getActiveNetworkInfo().isAvailable() && manager.getActiveNetworkInfo().isConnected()) {
  259.             return true;
  260.         }
  261.         else {
  262.             return false;
  263.         }
  264.     }
  265. }
JavaandroiduploadwebviewCapture

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