问题描述
早安。 我是Android Studio的新手，这是我的第一条消息。
我有一个网站，我想为其构建一个应用程序。 我想要的是带选项相机，便携式摄像机和文件/图库的文件选择器。 因此，我找到了一个名为“ OS FileUp Master”的文件，它看起来还不错。 我可以选择便携式摄像机，然后将其保存并上传到页面上。 但是，当我选择相机拍照并上载它时，显示和空白html框架。 图片的扩展名应为 .jpg ，但也应使其为mp4扩展名。 如果我关闭脚本中的摄像机，则没有任何问题，并且图片另存为jpg。 有可能解决吗？
MainActivity.java
import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.ClipData;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import androidx.annotation.NonNull;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.appcompat.app.AppCompatActivity;
import android.util.Log;
import android.view.KeyEvent;
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.Toast;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity{
/*-- CUSTOMIZE --*/
/*-- you can customize these options for your convenience --*/
private static String webview_url = "http://MY URL HERE"; // web address or local file location you want to open in webview
private static String file_type = "image/*"; // file types to be allowed for upload
private boolean multiple_files = true; // allowing multiple file upload
/*-- MAIN VARIABLES --*/
WebView webView;
private static final String TAG = MainActivity.class.getSimpleName();
private String cam_file_data = null; // for storing camera file @R_25_4045@ion
private ValueCallback<Uri> file_data; // data/header received after file selection
private ValueCallback<Uri[]> file_path; // received file(s) temp. location
private final static int file_req_code = 1;
@Override
protected void onActivityResult(int requestCode,int resultCode,Intent intent){
super.onActivityResult(requestCode,resultCode,intent);
if(Build.VERSION.SDK_INT >= 21){
Uri[] results = null;
/*-- if file request cancelled; exited camera. we need to send null value to make future attempts workable --*/
if (resultCode == Activity.RESULT_CANCELED) {
if (requestCode == file_req_code) {
file_path.onReceiveValue(null);
return;
}
}
/*-- continue if response is positive --*/
if(resultCode== Activity.RESULT_OK){
if(requestCode == file_req_code){
if(null == file_path){
return;
}
ClipData clipData;
String stringData;
try {
clipData = intent.getClipData();
stringData = intent.getDataString();
}catch (Exception e){
clipData = null;
stringData = null;
}
if (clipData == null && stringData == null && cam_file_data != null) {
results = new Uri[]{Uri.parse(cam_file_data)};
}else{
if (clipData != null) { // checking if multiple files selected or not
final int numSelectedFiles = clipData.getItemCount();
results = new Uri[numSelectedFiles];
for (int i = 0; i < clipData.getItemCount(); i++) {
results[i] = clipData.getItemAt(i).getUri();
}
} else {
results = new Uri[]{Uri.parse(stringData)};
}
}
}
}
file_path.onReceiveValue(results);
file_path = null;
}else{
if(requestCode == file_req_code){
if(null == file_data) return;
Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
file_data.onReceiveValue(result);
file_data = null;
}
}
}
@SuppressLint({"SetJavaScriptEnabled","WrongViewCast"})
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.os_view);
assert webView != null;
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setAllowFileAccess(true);
if(Build.VERSION.SDK_INT >= 21){
webSettings.setMixedContentMode(0);
webView.setLayerType(View.LAYER_TYPE_HARDWARE,null);
}else {
webView.setLayerType(View.LAYER_TYPE_SOFTWARE,null);
}
webView.setWebViewClient(new Callback());
webView.loadUrl(webview_url);
webView.setWebChromeClient(new WebChromeClient() {
/*--
openFileChooser is not a public Android API and has never been part of the SDK.
handling input[type="file"] requests for android API 16+; I've removed support below API 21 as it was failing to work along with latest APIs.
--*/
/* public void openFileChooser(ValueCallback<Uri> uploadMsg,String acceptType,String capture) {
file_data = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType(file_type);
if (multiple_files) {
i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
}
startActivityForResult(Intent.createChooser(i,"File Chooser"),file_req_code);
}
*/
/*-- handling input[type="file"] requests for android API 21+ --*/
public boolean onShowFileChooser(WebView webView,ValueCallback<Uri[]> filePathCallback,FileChooserParams fileChooserParams) {
if(file_permission() && Build.VERSION.SDK_INT >= 21) {
file_path = filePathCallback;
Intent takePictureIntent = null;
Intent takeVideoIntent = null;
// Turn camera's on or off
boolean includePhoto = true;
boolean includeVideo = true;
// End of turn camera's on or off
/*-- checking the accept parameter to determine which intent(s) to include --*/
paramCheck:
for (String acceptTypes : fileChooserParams.getAcceptTypes()) {
String[] splitTypes = acceptTypes.split(",?+"); // although it's an array,it still seems to be the whole value; split it out into chunks so that we can detect multiple values
for (String acceptType : splitTypes) {
switch (acceptType) {
case "*/*":
includePhoto = true;
includeVideo = true;
break paramCheck;
case "image/*":
includePhoto = true;
break;
case "video/*":
includeVideo = true;
break;
}
}
}
if (fileChooserParams.getAcceptTypes().length == 0) { //no `accept` parameter was specified,allow both photo and video
includePhoto = true;
includeVideo = true;
}
if (includePhoto) {
takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(MainActivity.this.getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = create_image();
takePictureIntent.putExtra("PhotoPath",cam_file_data);
} catch (IOException ex) {
Log.e(TAG,"Image file creation Failed",ex);
}
if (photoFile != null) {
cam_file_data = "file:" + photoFile.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(photoFile));
} else {
cam_file_data = null;
takePictureIntent = null;
}
}
}
if (includeVideo) {
takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
if (takeVideoIntent.resolveActivity(MainActivity.this.getPackageManager()) != null) {
File videoFile = null;
try {
videoFile = create_video();
} catch (IOException ex) {
Log.e(TAG,"Video file creation Failed",ex);
}
if (videoFile != null) {
cam_file_data = "file:" + videoFile.getAbsolutePath();
takeVideoIntent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(videoFile));
} else {
cam_file_data = null;
takeVideoIntent = null;
}
}
}
Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType(file_type);
if (multiple_files) {
contentSelectionIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
}
Intent[] intentArray;
if (takePictureIntent != null && takeVideoIntent != null) {
intentArray = new Intent[]{takePictureIntent,takeVideoIntent};
} else if (takePictureIntent != null) {
intentArray = new Intent[]{takePictureIntent};
} else if (takeVideoIntent != null) {
intentArray = new Intent[]{takeVideoIntent};
} else {
intentArray = new Intent[0];
}
Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT,contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE,"File chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS,intentArray);
startActivityForResult(chooserIntent,file_req_code);
return true;
} else {
return false;
}
}
});
}
/*-- callback reporting if error occurs --*/
public class Callback extends WebViewClient{
public void onReceivedError(WebView view,int errorCode,String description,String failingUrl){
Toast.makeText(getApplicationContext(),"Failed loading app!",Toast.LENGTH_SHORT).show();
}
}
/*-- checking and asking for required file permissions --*/
public boolean file_permission(){
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)) {
ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.CAMERA},1);
return false;
}else{
return true;
}
}
/*-- creating new image file here --*/
private File create_image() throws IOException{
@SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "img_"+timeStamp+"_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
return File.createTempFile(imageFileName,".jpg",storageDir);
}
/*-- creating new video file here --*/
private File create_video() throws IOException {
@SuppressLint("SimpleDateFormat")
String file_name = new SimpleDateFormat("yyyy_mm_ss").format(new Date());
String new_name = "file_"+file_name+"_";
File sd_directory = getExternalFilesDir(Environment.DIRECTORY_MOVIES);
return File.createTempFile(new_name,".mp4",sd_directory);
}
/*-- back/down key handling --*/
@Override
public boolean onKeyDown(int keyCode,@NonNull KeyEvent event){
if(event.getAction() == KeyEvent.ACTION_DOWN){
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (webView.canGoBack()) {
webView.goBack();
} else {
finish();
}
return true;
}
}
return super.onKeyDown(keyCode,event);
}
@Override
public void onConfigurationChanged(Configuration newConfig){
super.onConfigurationChanged(newConfig);
}
}
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
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