Android Wählen Sie Bild oder Kamera

Question

Ich habe den Code für die Auswahl eines Bildes von SD oder Kamera implementiert. Aber mein Bild erscheint nicht in ImageView und ich kann kein Bild von der SD-Karte wählen.

Wenn ich auf ein Bild von einer SD-Karte klicke, springt es sofort zurück zu meiner Aktivität.

final String[] items = new String[] {"From Camera","From SD Card"}; 
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.select_dialog_item,items); 
    AlertDialog.Builder builder = new AlertDialog.Builder(this); 
    builder.setTitle("Select Image"); 
    builder.setAdapter(adapter,new DialogInterface.OnClickListener(){ 
     public void onClick(DialogInterface dialog,int which){ 
      if(which == 0){ 
       intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
       File file = new File(Environment.getExternalStorageDirectory(),"event_image"+String.valueOf(System.currentTimeMillis()+".jpg")); 
       imageCaptureUri = Uri.fromFile(file); 
       try { 
        intent.putExtra(MediaStore.EXTRA_OUTPUT,imageCaptureUri); 
        intent.putExtra("return data",true); 
        startActivityForResult(intent,PICK_FROM_CAMERA); 
       }catch(Exception ex){ 
        ex.printStackTrace(); 
       } 
       dialog.cancel(); 
      }else{ 
       intent = new Intent(); 
       intent.setType("image/*"); 
       intent.setAction(Intent.ACTION_GET_CONTENT); 
       startActivityForResult(Intent.createChooser(intent,"Complete action using"),PICK_FROM_FILE); 
      } 
     } 
    }); 
    final AlertDialog dialog = builder.create(); 
    mImageView = (ImageView) findViewById(R.id.imageView); 
    imagePicker = (ImageButton) findViewById(R.id.image_picker); 
    imagePicker.setOnClickListener(new View.OnClickListener(){ 
     @Override 
     public void onClick(View v){ 
      dialog.show(); 
     } 
    }); 

    @Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    if(requestCode != RESULT_OK) 
     return; 
    Bitmap bitmap = null; 
    String path =""; 
    if(requestCode == PICK_FROM_FILE) { 
     imageCaptureUri = data.getData(); 
     path = getRealPathFromURI(imageCaptureUri); 
     if(path == null) 
      path = imageCaptureUri.getPath(); 
     if(path != null){ 
      bitmap = BitmapFactory.decodeFile(path); 
     } 
    }else{ 
     path = imageCaptureUri.getPath(); 
     bitmap = BitmapFactory.decodeFile(path); 
    } 
    mImageView.setImageBitmap(bitmap); 
} 


    public String getRealPathFromURI(Uri contentURI){ 
    String[] proj = {MediaStore.Images.Media.DATA}; 
    Cursor cursor = managedQuery(contentURI,proj,null,null,null); 
    if(cursor == null) return null; 
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
    cursor.moveToFirst(); 
    return cursor.getString(column_index); 
} 

Answer 1

1. Zuerst müssen Sie die Erlaubnis WRITE_EXTERNAL_STORAGE in AndroidManifest.xml

2. in Ihrem XML-Layout verwenden:

   <ImageView 
       android:id="@+id/img" 
       android:layout_width="match_parent" 
       android:layout_height="380dp" 
       android:background="#f241c9" /> 
   
   <Button 
       android:id="@+id/btnCapture" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_gravity="center" 
       android:layout_marginTop="20dp" 
       android:text="Take Photo" /> 
   
   <Button 
       android:id="@+id/btnPick" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_gravity="center" 
       android:layout_marginTop="20dp" 
       android:text="Pick Photo" /> 
   

3. In Aktivitätsklasse:

   private static final String TAG = "my_log"; 
   private static final int REQUEST_CAPTURE_FROM_CAMERA = 1; 
   private static final int REQUEST_PICK_FROM_FILE = 2; 
   private static final int REQUEST_CROP_INTENT = 3; 
   
   ImageView img; 
   Button btnCapture, btnPick; 
   File file; 
   
   @Override 
   protected void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.activity_main); 
   
       img = (ImageView) findViewById(R.id.img); 
       btnCapture = (Button) findViewById(R.id.btnCapture); 
       btnPick = (Button) findViewById(R.id.btnPick); 
   
       btnCapture.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); 
         file = new File(Environment.getExternalStorageDirectory() + File.separator + "img_captured.jpg"); 
         // put Uri as extra in intent object 
         intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); 
         startActivityForResult(intent, REQUEST_CAPTURE_FROM_CAMERA); 
        } 
       }); 
   
       btnPick.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent intent = new Intent(); 
         intent.setType("image/*"); 
         intent.setAction(Intent.ACTION_GET_CONTENT); 
         startActivityForResult(Intent.createChooser(intent, "Complete action using"), REQUEST_PICK_FROM_FILE); 
        } 
       }); 
   
   } 
   
   @Override 
   protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
   
       if (resultCode != RESULT_OK) return; 
   
       if (requestCode == REQUEST_CAPTURE_FROM_CAMERA) { 
        try { 
         cropImage(Uri.fromFile(file)); 
        } catch (ActivityNotFoundException e) { 
         Toast.makeText(this, "Your device does not support the crop action!", Toast.LENGTH_SHORT).show(); 
         e.printStackTrace(); 
        } 
       } else if (requestCode == REQUEST_PICK_FROM_FILE) { 
        try { 
         cropImage(data.getData()); 
        } catch (ActivityNotFoundException e) { 
         Toast.makeText(this, "Your device does not support the crop action!", Toast.LENGTH_SHORT).show(); 
         e.printStackTrace(); 
        } 
       } else if (requestCode == REQUEST_CROP_INTENT) { 
        // Create an instance of bundle and get the returned data 
        Bundle extras = data.getExtras(); 
        // get the cropped bitmap from extras 
        Bitmap bitmap = extras.getParcelable("data"); 
        img.setImageBitmap(bitmap); 
        if (saveBitmapToStorage(bitmap)) { 
         Log.d(TAG, "Bitmap saved to file successful."); 
        } else { 
         Log.d(TAG, "Failed to save Bitmap to storage."); 
        } 
       } 
   
   } 
   
   public void cropImage(Uri picUri) { 
       //call the standard crop action intent 
       Intent cropIntent = new Intent("com.android.camera.action.CROP"); 
       //indicate image type and Uri of image 
       cropIntent.setDataAndType(picUri, "image/*"); 
       //set crop properties 
       cropIntent.putExtra("crop", "true"); 
       //indicate aspect of desired crop 
       cropIntent.putExtra("aspectX", 1); 
       cropIntent.putExtra("aspectY", 1); 
       //indicate output X and Y 
       cropIntent.putExtra("outputX", 256); 
       cropIntent.putExtra("outputY", 256); 
       //retrieve data on return 
       cropIntent.putExtra("return-data", true); 
       //start the activity - we handle returning in onActivityResult 
       startActivityForResult(cropIntent, REQUEST_CROP_INTENT); 
   } 
   
   private boolean saveBitmapToStorage(Bitmap finalBitmap) { 
       boolean result = false; 
   
       File file = new File(Environment.getExternalStorageDirectory() + File.separator + "img_cropped.jpg"); 
       Log.d(TAG, "file path = " + file.getAbsolutePath()); 
   
       try { 
        FileOutputStream out = new FileOutputStream(file); 
        finalBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out); 
        out.flush(); 
        out.close(); 
   
        // send Broadcast to notify this photo and see it in Gallery 
        Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); 
        Uri contentUri = Uri.fromFile(file); 
        mediaScanIntent.setData(contentUri); 
        sendBroadcast(mediaScanIntent); 
   
        result = true; 
       } catch (Exception e) { 
        e.printStackTrace(); 
       } 
   
       return result; 
   }