ビットマップイメージをイメージビューに取得できません

Question

イメージは目的のフォルダに保存されていますが、イメージビューに表示されていないか、トーストが表示されていません。異なるXMLファイルやクラスを変更する問題は依然として存在します。

私はあなたのコード内の間違いを持っ​​ていると信じてい

package com.example.mohammadhasham.jtbopencameramodule; 

import android.app.Activity; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.icu.text.SimpleDateFormat; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Environment; 
import android.provider.MediaStore; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v4.content.FileProvider; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.Toast; 

import java.io.File; 
import java.util.Date; 

public class CameraActivity extends AppCompatActivity { 

    ImageView img; 
    String currentPath; 
    File f; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_camera); 

     img = (ImageView) (findViewById(R.id.capture)); 


    } 

    public void captureImage(View v) { 

     Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
     f = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "image.jpg"); 
     Uri u = Uri.fromFile(f); 
     i.putExtra(MediaStore.EXTRA_OUTPUT, u); 
     i.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); 
     startActivityForResult(i, 0); 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

     if (resultCode == 0) { 
      switch (resultCode) { 
       case Activity.RESULT_OK: 
       { 
        if (f.exists()) 
        { 
         Toast.makeText(this, "Image Saved To Gallery", Toast.LENGTH_LONG).show(); 
         Bitmap b = BitmapFactory.decodeFile(f.getAbsolutePath()); 
          img.setImageBitmap(b); 


        } 
        else 
        { 
         Toast.makeText(this, "Image Not Saved To Gallery", Toast.LENGTH_LONG).show(); 

        } 
        break; 
       } 
       case Activity.RESULT_CANCELED: 
       { 
        break; 
       } 
       default: 
        break; 
      } 
     } 
    } 

} 

Answer 1

：

あなたは

if (resultCode == 0) { 
      switch (resultCode) { 
       case Activity.RESULT_OK: 
       { 

はあなたが値0にのresultCodeを制限し、その後のITに基づいてスイッチを実行しようとしていると言います値。

Answer 2

これを試してください：

パブリッククラスCameraActivityはAppCompatActivity {

private final String APP_TAG = "MyCustomApp"; 
private static final int REQUEST_IMAGE_CAPTURE = 1; 
private String photoFileName = "photo.jpg"; 

private ImageView img; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 


    img = (ImageView) (findViewById(R.id.imageView)); 
} 

public void captureImage(View v) { 

    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) { 
     takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, getPhotoFileUri(photoFileName)); 
     takePictureIntent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); 
     startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE); 
    } 
} 

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) { 
     Toast.makeText(this, "Image Saved To Gallery", Toast.LENGTH_LONG).show(); 

     Uri takenPhotoUri = getPhotoFileUri(photoFileName); 
     Bitmap imageBitmap = BitmapFactory.decodeFile(takenPhotoUri.getPath()); 
     img.setImageBitmap(imageBitmap); 
    } else { 
     Toast.makeText(this, "Image Not Saved To Gallery", Toast.LENGTH_LONG).show(); 

    } 
} 

// Returns the Uri for a photo stored on disk given the fileName 
public Uri getPhotoFileUri(String fileName) { 
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
      Environment.DIRECTORY_DOWNLOADS).getAbsolutePath()); 

    // Create the storage directory if it does not exist 
    if (!mediaStorageDir.exists() && !mediaStorageDir.mkdirs()) { 
     Log.d(APP_TAG, "failed to create directory"); 
    } 

    // Return the file target for the photo based on filename 
    return Uri.fromFile(new File(mediaStorageDir.getPath() + File.separator + fileName)); 
} 

}