在 Android 中，我正在尝试从移动文件上传文件..有一个上传文件的按钮...
在下面的代码中，我可以使用按钮上传文件。
在我点击按钮后，它要求我选择 CAM 或 UPLOAD...当我选择 UPLOAD 时，没问题，但在我选择 CAM 并获取原型后..它已关闭，但没有文件上传..
我该如何解决这个问题
package www.aaaaaa.aaaaaaapp;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.RelativeLayout;
import android.widget.Toast;
import androidx.core.content.FileProvider;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
private WebView webView;
private RelativeLayout noInternetLayout;
private static final int FILE_CHOOSER_REQUEST_CODE = 1;
private static final int CAMERA_REQUEST_CODE = 2;
private static final int COLES_REQUEST_CODE = 3;
private ValueCallback<Uri[]> fileUploadCallback;
private String mCameraPhotoPath;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
noInternetLayout = findViewById(R.id.noInternetLayout);
webView = findViewById(R.id.wbView);
webView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webSettings.setAllowFileAccess(true);
webSettings.setAllowFileAccessFromFileURLs(true);
webSettings.setAllowUniversalAccessFromFileURLs(true);
webView.setWebViewClient(new WebViewClient() {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
if (!isConnected()) {
webView.setVisibility(View.GONE);
noInternetLayout.setVisibility(View.VISIBLE);
}
}
@Override
public void onPageFinished(WebView view, String url) {
webView.setVisibility(View.VISIBLE);
}
});
webView.setWebChromeClient(new WebChromeClient() {
ValueCallback<Uri[]> fileUploadCallback;
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
fileUploadCallback = filePathCallback;
boolean wasCancelled = true;
String[] permissions = {
Manifest.permission.CAMERA,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (!arePermissionsGranted(permissions)) {
requestPermissions(permissions);
fileUploadCallback.onReceiveValue(new Uri[]{});
fileUploadCallback = null;
} else {
selectParam(filePathCallback, fileChooserParams, wasCancelled);
}
} else {
selectParam(filePathCallback, fileChooserParams, wasCancelled);
}
return true;
}
});
webView.loadUrl("https://www.aaaaaa.com/");
}
private void selectParam(ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams, boolean wasCancelled ) {
final CharSequence[] items = {"Kamera", "Dosya Seç"};
fileUploadCallback = filePathCallback;
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Seçenek");
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
Intent intent = fileChooserParams.createIntent();
if (items[item].equals("Kamera")) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
try {
File photoFile = createImageFile();
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(MainActivity.this, "www.aaaaaa.aaaaaaapp.fileprovider", photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, CAMERA_REQUEST_CODE);
} else {
startActivityForResult(intent, COLES_REQUEST_CODE);
}
} catch (IOException ex) {
startActivityForResult(intent, COLES_REQUEST_CODE);
ex.printStackTrace();
}
} else {
Toast.makeText(MainActivity.this, "Kamera bulunamadı.", Toast.LENGTH_SHORT).show();
startActivityForResult(intent, COLES_REQUEST_CODE);
}
} else if (items[item].equals("Dosya Seç")) {
Intent chooserIntent = Intent.createChooser(intent, "Dosya Seç");
startActivityForResult(chooserIntent, FILE_CHOOSER_REQUEST_CODE);
}else{
startActivityForResult( intent, COLES_REQUEST_CODE);
}
}
});
builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
if(fileUploadCallback != null){
fileUploadCallback.onReceiveValue(new Uri[]{});
fileUploadCallback = null;
}
}
});
builder.show();
}
private boolean isConnected() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
return activeNetwork != null && activeNetwork.isConnectedOrConnecting();
}
private File createImageFile() throws IOException {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "img_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
return File.createTempFile(imageFileName, ".jpg", storageDir);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.e("TAGaaaaaaaaaaaaaaaaa", "Image file creation data " + resultCode );
if (requestCode == FILE_CHOOSER_REQUEST_CODE) {
if (fileUploadCallback != null && resultCode == RESULT_OK) {
Uri[] result = WebChromeClient.FileChooserParams.parseResult(resultCode, data);
fileUploadCallback.onReceiveValue(result);
fileUploadCallback = null;
}else{
fileUploadCallback.onReceiveValue(new Uri[]{});
fileUploadCallback = null;
}
} else if (requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK) {
File photoFile = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "image.jpg");
Log.e("TAGaaaaaaaaaaaaaaaaa", "Image file creation data asdsadsadsada 33333333333 " + photoFile);
if (photoFile.exists()) {
Uri photoURI = FileProvider.getUriForFile(MainActivity.this, "www.aaaaaa.aaaaaaapp.fileprovider", photoFile);
if (photoURI != null) {
fileUploadCallback.onReceiveValue(new Uri[]{photoURI}); // Uri'yi dizi içinde gönderiyoruz
fileUploadCallback = null;
} else {
Toast.makeText(MainActivity.this, "Güncelleme Gerekli...", Toast.LENGTH_SHORT).show();
fileUploadCallback.onReceiveValue(new Uri[]{});
fileUploadCallback = null;
return;
}
} else {
Toast.makeText(MainActivity.this, "Dosya bulunamadı.", Toast.LENGTH_SHORT).show();
fileUploadCallback.onReceiveValue(new Uri[]{});
fileUploadCallback = null;
return;
}
}else{
Log.e("TAGaaaaaaaaaaaaaaaaa", "Image file creation data asdsadsadsada 33333333333 " );
fileUploadCallback.onReceiveValue(new Uri[]{});
fileUploadCallback = null;
}
}
private boolean arePermissionsGranted(String[] permissions) {
for (String permission : permissions) {
if (ActivityCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}
private void requestPermissions(String[] permissions) {
ActivityCompat.requestPermissions(this, permissions, FILE_CHOOSER_REQUEST_CODE);
}
}
以下是解决该问题的一些建议：
检查文件权限：确保您的应用程序拥有使用相机和存储所需的授权。在您的
AndroidManifest.xmlCAMERAWRITE_EXTERNAL_STORAGE验证 FileProvider 配置：验证
FileProvider调试
createImageFile()createImageFile()检查
onActivityResult()onActivityResult()resultCode