如何从gallery中选择的图像获取图像uri安卓5.0.2？

mitkmikd  于 2021-07-03  发布在  Java
关注(0)|答案(1)|浏览(310)

我是新来安卓的。请给我一些帮助。我需要图像uri，在此之前我尝试了data.getdata（）；并将其传递给getcontentresolver（）.query（）但是data.getdata（）；始终返回空错误位于以下行：
uri selectedimageuri=getimageuri（getapplicationcontext（），selectedimage）；返回uri.parse（路径）；
我的android版本是5.0.2

  1. 05-10 01:55:10.712 24424-24424/com.donateblood.blooddonation E/AndroidRuntime: FATAL EXCEPTION: main
  2.     Process: com.donateblood.blooddonation, PID: 24424
  3.     java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { act=com.htc.HTCAlbum.action.ITEM_PICKER_FROM_COLLECTIONS (has extras) }} to activity {com.donateblood.blooddonation/com.donateblood.blooddonation.UploadImage}: java.lang.NullPointerException: uriString
  4.         at android.app.ActivityThread.deliverResults(ActivityThread.java:3881)
  5.         at android.app.ActivityThread.handleSendResult(ActivityThread.java:3931)
  6.         at android.app.ActivityThread.access$1300(ActivityThread.java:144)
  7.         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1408)
  8.         at android.os.Handler.dispatchMessage(Handler.java:102)
  9.         at android.os.Looper.loop(Looper.java:155)
  10.         at android.app.ActivityThread.main(ActivityThread.java:5696)
  11.         at java.lang.reflect.Method.invoke(Native Method)
  12.         at java.lang.reflect.Method.invoke(Method.java:372)
  13.         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028)
  14.         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
  15.      Caused by: java.lang.NullPointerException: uriString
  16.         at android.net.Uri$StringUri.<init>(Uri.java:473)
  17.         at android.net.Uri$StringUri.<init>(Uri.java:463)
  18.         at android.net.Uri.parse(Uri.java:435)
  19.         at com.donateblood.blooddonation.UploadImage.getImageUri(UploadImage.java:156)
  20.         at com.donateblood.blooddonation.UploadImage.onActivityResult(UploadImage.java:102)
  21.         at android.app.Activity.dispatchActivityResult(Activity.java:6160)
  22.         at android.app.ActivityThread.deliverResults(ActivityThread.java:3877)
  23.         at android.app.ActivityThread.handleSendResult(ActivityThread.java:3931) 
  24.         at android.app.ActivityThread.access$1300(ActivityThread.java:144) 
  25.         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1408) 
  26.         at android.os.Handler.dispatchMessage(Handler.java:102) 
  27.         at android.os.Looper.loop(Looper.java:155) 
  28.         at android.app.ActivityThread.main(ActivityThread.java:5696) 
  29.         at java.lang.reflect.Method.invoke(Native Method) 
  30.         at java.lang.reflect.Method.invoke(Method.java:372) 
  31.         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028) 
  32.         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
  1. package com.donateblood.blooddonation;
  3. import android.app.ProgressDialog;
  4. import android.content.ActivityNotFoundException;
  5. import android.content.Context;
  6. import android.content.Intent;
  7. import android.database.Cursor;
  8. import android.graphics.Bitmap;
  9. import android.graphics.BitmapFactory;
  10. import android.graphics.Canvas;
  11. import android.graphics.Path;
  12. import android.graphics.Rect;
  13. import android.net.Uri;
  14. import android.os.AsyncTask;
  15. import android.os.Bundle;
  16. import android.provider.MediaStore;
  17. import android.support.v7.app.AppCompatActivity;
  18. import android.util.Base64;
  19. import android.util.Log;
  20. import android.view.View;
  21. import android.widget.Button;
  22. import android.widget.EditText;
  23. import android.widget.ImageView;
  24. import android.widget.Spinner;
  25. import android.widget.TextView;
  26. import android.widget.Toast;
  28. import com.mongodb.DB;
  29. import com.mongodb.gridfs.GridFS;
  30. import com.mongodb.gridfs.GridFSInputFile;
  32. import java.io.ByteArrayOutputStream;
  33. import java.io.File;
  34. import java.io.FileInputStream;
  35. import java.io.FileNotFoundException;
  36. import java.io.IOException;
  38. import butterknife.ButterKnife;
  39. import butterknife.InjectView;
  41. /**
  42.  * Created by YouCaf Iqbal on 4/26/2016.
  43.  */
  44. public class UploadImage extends AppCompatActivity {
  46.     public static final int RESULT_LOAD = 1;
  47.     @InjectView(R.id.imageView) ImageView ImageUpload;
  48.     @InjectView(R.id.upload) Button Btn_Upload;
  49.     @InjectView(R.id.proceed) Button Btn_Proceed;
  50.     public String bloodgroup,name,password,number,email,picturePath,encodedPhotoString;
  51.     Database dbobj = new Database();
  52.     GPSTracker gps; private DB db;
  53.     public double latitude=0;
  54.     public double longitude=0;
  56.     @Override
  57.     protected void onCreate(Bundle savedInstanceState) {
  58.         super.onCreate(savedInstanceState);
  59.         setContentView(R.layout.uploadimage);
  60.         ButterKnife.inject(this);
  61.         getCurrentLatLong();
  62.         Btn_Upload.setOnClickListener(new View.OnClickListener() {
  63.             @Override
  64.             public void onClick(View v) {
  65.                 try{
  66.                 Intent upload = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
  67.                 //Adding Croping
  68.                 upload.putExtra("crop","true");
  69.                 upload.putExtra("aspectX",1);
  70.                 upload.putExtra("aspectY",1);
  71.                 upload.putExtra("outputX",300);
  72.                 upload.putExtra("outputY",300);
  73.                 upload.putExtra("return-data",true);
  74.                 startActivityForResult(upload,RESULT_LOAD);
  75.             } catch (ActivityNotFoundException E) {
  77.                     String errorMessage = "Your device doesn't support the crop action!";
  78.                     Toast toast = Toast.makeText(UploadImage.this, errorMessage, Toast.LENGTH_SHORT);
  79.                     toast.show();
  80.                 }
  81.             }
  82.         });
  83.         Btn_Proceed.setOnClickListener(new View.OnClickListener() {
  84.             @Override
  85.             public void onClick(View v) {
  86.                 Prcoess();
  87.             }
  88.         });
  89.     }
  90.     // When image is selected from Gallery
  91.     @Override
  92.     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  94.         super.onActivityResult(requestCode, resultCode, data);
  95.         if(requestCode==RESULT_LOAD && resultCode==RESULT_OK && data!=null){
  96.             Bundle extras = data.getExtras();
  97.             //Uri SelectedImageURI = (Uri)extras.get(Intent.EXTRA_STREAM);
  98.             Bitmap SelectedImage = extras.getParcelable("data");
  99.             //Make Image rounded
  100.             //Bitmap RoundedImage = getRoundedShape(SelectedImage);
  101.            // Uri SelectedImageURI = data.getData();
  102.             Uri SelectedImageURI = getImageUri(getApplicationContext(), SelectedImage);
  104.             picturePath = getRealPathFromURI(SelectedImageURI);
  105.             ImageUpload.setImageBitmap(SelectedImage);
  106.             // retrieve image path
  107.             String[] projection = {MediaStore.Images.Media.DATA};
  108.             try {
  109.                // Cursor cursor = getContentResolver().query(SelectedImageURI, projection, null, null, null);
  110.                //cursor.moveToFirst();
  111.                // int columnIndex = cursor.getColumnIndex(projection[0]);
  112.                 // picturePath = cursor.getString(columnIndex);
  113.                // cursor.close();
  114.                 ////////////////////////////////////////////////////
  116.                 String fileNameSegments[] = picturePath.split("/");
  117.                 String fileName = fileNameSegments[fileNameSegments.length - 1];
  118.                 try {
  119.                     File f = new File(picturePath);
  120.                     Bitmap myImg = decodeFile(f,720);
  121.                     //myImg = getResizedBitmap(myImg,100); // Compress it
  122.                     // Bitmap myImg = BitmapFactory.decodeFile(picturePath);
  123.                     ByteArrayOutputStream stream = new ByteArrayOutputStream();
  124.                     // Must compress the Image to reduce image size to make upload easy
  125.                     // myImg = getResizedBitmap(myImg, 720);
  126.                     myImg.compress(Bitmap.CompressFormat.JPEG, 50, stream);
  127.                     byte[] byte_arr = stream.toByteArray();
  128.                     // Encode Image to String
  129.                     encodedPhotoString = Base64.encodeToString(byte_arr, 0);
  130.                    // ImageUpload.setImageBitmap(myImg);
  132.                 }catch (Exception e){
  133.                     Toast.makeText(UploadImage.this,"Unable to Set Image Try Again",Toast.LENGTH_SHORT).show();
  134.                 }
  136.                 //Log.d("Picture Path", picturePath);
  137.                // Toast.makeText(getBaseContext(), ""+picturePath+"", Toast.LENGTH_LONG).show();
  138.             }
  139.             catch(Exception e) {
  140.                // Log.e("Path Error", e.toString());
  141.                 Toast.makeText(getBaseContext(), "Error finding path", Toast.LENGTH_LONG).show();
  142.                 e.printStackTrace();
  143.             }
  144.             //
  145.         }
  146.     }
  147.     public void Prcoess(){
  148.         dbAsync signupThread = new dbAsync();
  149.          signupThread.execute();
  150.     }
  152.     public Uri getImageUri(Context inContext, Bitmap inImage) {
  153.         ByteArrayOutputStream bytes = new ByteArrayOutputStream();
  154.         inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
  155.         String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
  156.         return Uri.parse(path);
  157.     }
  158.     public String getRealPathFromURI(Uri uri) {
  159.         Cursor cursor = getContentResolver().query(uri, null, null, null, null);
  160.         cursor.moveToFirst();
  161.         int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
  162.         return cursor.getString(idx);
  163.     }
  165.     public class dbAsync extends AsyncTask<Void,Void,Void> {
  167.         private ProgressDialog pDialog;
  168.         @Override
  169.         protected void onPreExecute() {
  170.             super.onPreExecute();
  171.             pDialog = new ProgressDialog(UploadImage.this);
  172.             pDialog.setMessage("Creating Account...");
  173.             pDialog.setIndeterminate(false);
  174.             pDialog.setCancelable(true);
  175.             pDialog.show();
  176.         }
  177.         @Override
  178.         protected Void doInBackground(Void... voids) {
  179.             GetUserDetails();
  180.             dbobj.insertUser(name,email,password,number,bloodgroup,latitude,longitude,encodedPhotoString);
  181.             return null;
  182.         }
  183.         @Override
  184.         protected void onPostExecute(Void aVoid) {
  185.             super.onPostExecute(aVoid);
  186.             pDialog.dismiss();
  187.             Toast.makeText(getBaseContext(), "Created Successfully", Toast.LENGTH_LONG).show();
  188.            // Toast.makeText(getBaseContext(), ""+encodedPhotoString+"", Toast.LENGTH_LONG).show();
  189.             onSignupSuccess();
  190.         }
  191.     }
  193.     public void onSignupSuccess() {
  194.        // btn_signup.setEnabled(true);
  195.         //setResult(RESULT_OK, null);
  196.         Intent intent = new Intent(getApplicationContext(), LoginActivity.class);
  197.         startActivity(intent);
  198.         finish();
  199.     }
  201.     public void GetUserDetails(){
  202.         //mySpinner=(Spinner) findViewById(R.id.spinner);
  203.         bloodgroup = SignupActivity.bloodgroup.toString();
  204.         name = SignupActivity.name.toString();
  205.         email = SignupActivity.email.toString();
  206.         password = SignupActivity.password.toString();
  207.         number = SignupActivity.number.toString();
  208.     }
  210.     public void getCurrentLatLong(){
  211.         gps = new GPSTracker(UploadImage.this);
  212.         if (gps.canGetLocation()) {
  213.             latitude = gps.getLatitude();
  214.             longitude = gps.getLongitude();
  215.         }
  216.     }
  218.    public Bitmap decodeFile(File f,int IMAGE_MAX_SIZE){
  219.        Bitmap b = null;
  221.        //Decode image size
  222.        BitmapFactory.Options o = new BitmapFactory.Options();
  223.        o.inJustDecodeBounds = true;
  225.        FileInputStream fis = null;
  226.        try {
  227.            fis = new FileInputStream(f);
  228.        } catch (FileNotFoundException e) {
  229.            e.printStackTrace();
  230.        }
  231.        BitmapFactory.decodeStream(fis, null, o);
  232.        try {
  233.            fis.close();
  234.            int scale = 1;
  235.            if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) {
  236.                scale = (int) Math.pow(2, (int) Math.ceil(Math.log(IMAGE_MAX_SIZE /
  237.                        (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
  238.            }
  239.            //Decode with inSampleSize
  240.            BitmapFactory.Options o2 = new BitmapFactory.Options();
  241.            o2.inSampleSize = scale;
  242.            fis = new FileInputStream(f);
  243.            b = BitmapFactory.decodeStream(fis, null, o2);
  244.            fis.close();
  246.        }catch (IOException e) {
  247.            e.printStackTrace();
  248.        }
  250.        return b;
  251.    }
  253. }
Javaandroid

1条答案

按热度按时间
g2ieeal7

g2ieeal71#

ACTION_PICK 将结果返回到 Uri 在 Intent 交付至 onActivityResult() . 你打电话来 getData() 为了得到这个 Uri . 就这样。因此，你生活中的一切 if(requestCode==RESULT_LOAD && resultCode==RESULT_OK && data!=null) 阻塞不仅是错误的，而且是无用的。
除此之外，摆脱所有未记录的临时演员，你放在那
ACTION_PICK Intent . 使用图像裁剪库。

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