从相机获取图像到ImageView Android

Question

以下代码可以很好地获取从相机拍摄的照片的缩略图。我想获得完整的图像，而不仅仅是缩略图。我有一个三星的Galaxy Nexus

private static final int CAMERA_PIC_REQUEST = 1111; 

private ImageView mImage; 

    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_my_camera); 
     mImage = (ImageView) findViewById(R.id.imageView1); 
     Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
     startActivityForResult(intent, CAMERA_PIC_REQUEST); 
    } 

    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     if (requestCode == CAMERA_PIC_REQUEST) { 
      Bitmap thumbnail = (Bitmap) data.getExtras().get("data"); 
      mImage.setImageBitmap(thumbnail); 
      ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 
      thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bytes); 
      File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg"); 
      try { 
       file.createNewFile(); 
       FileOutputStream fo = new FileOutputStream(file); 
       fo.write(bytes.toByteArray()); 
       fo.close(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 
    } 

Answer 1

得到你需要先将其保存到文件，然后提取它是从它的位图一个全尺寸的图片，这样做：在onActivityResult

Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); 
File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg"); 
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); 
startActivityForResult(intent, CAPTURE_NEW_PICTURE); 

然后：

File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg"); 
mImage = (ImageView) findViewById(R.id.imageView1); 
mImage.setImageBitmap(decodeSampledBitmapFromFile(file.getAbsolutePath(), 500, 250)); 

当decodeSampledBitmapFromFile：

public static Bitmap decodeSampledBitmapFromFile(String path, 
     int reqWidth, int reqHeight) { // BEST QUALITY MATCH 

    // First decode with inJustDecodeBounds=true to check dimensions 
    final BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inJustDecodeBounds = true; 
    BitmapFactory.decodeFile(path, options); 

    // Calculate inSampleSize 
     // Raw height and width of image 
     final int height = options.outHeight; 
     final int width = options.outWidth; 
     options.inPreferredConfig = Bitmap.Config.RGB_565; 
     int inSampleSize = 1; 

     if (height > reqHeight) { 
      inSampleSize = Math.round((float)height/(float)reqHeight); 
     } 

     int expectedWidth = width/inSampleSize; 

     if (expectedWidth > reqWidth) { 
      //if(Math.round((float)width/(float)reqWidth) > inSampleSize) // If bigger SampSize.. 
      inSampleSize = Math.round((float)width/(float)reqWidth); 
     } 


    options.inSampleSize = inSampleSize; 

    // Decode bitmap with inSampleSize set 
    options.inJustDecodeBounds = false; 

    return BitmapFactory.decodeFile(path, options); 
    } 

您可以使用数字（在这种情况下为500和250）来更改ImageView的位图质量。