当我使用我的设备拍照时,此代码会在inputStream =
行崩溃,错误为java.lang.NullPointerException
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Uri uriImage;
InputStream inputStream = null;
ImageView imvCover = (ImageView)this.findViewById(R.id.imvCover);
if ((requestCode == CAPTURE_IMAGE) && resultCode == Activity.RESULT_OK) {
uriImage = data.getData();
try {
inputStream = getContentResolver().openInputStream(uriImage);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream, null, null);
imvCover.setImageBitmap(bitmap);
} catch (NullPointerException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
imvCover.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
imvCover.setAdjustViewBounds(true);
}
}
任何想法为什么?
这是我用来打开相机拍照的代码:
Button btnTakePicture = (Button)this.findViewById(R.id.btnTakePicture);
btnTakePicture.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAPTURE_IMAGE);
}
});
答案 0 :(得分:0)
此方法可能不适用于所有设备。相反,您可以指定新图像的保存位置,然后您可以使用该预定文件路径来处理新图像。
File tempFolder = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
+ "/your_folder");
tempFolder.mkdir();
file = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
+ "/your_folder", String.valueOf(System.currentTimeMillis()) + ".jpg");
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
startActivityForResult(intent, TAKE_PICTURE);
答案 1 :(得分:0)
试试这个..
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
File out = Environment.getExternalStorageDirectory();
out = new File(out, "newImage.jpg");
i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(out));
startActivityForResult(i, 1);
这是onActivity结果..
@Override
protected void onActivityResult(int requestCode, int resultcode, Intent intent)
{
super.onActivityResult(requestCode, resultcode, intent);
File out = new File(Environment.getExternalStorageDirectory(), "newImage.jpg");
if(!out.exists())
{
Log.v("log", "file not found");
Toast.makeText(getBaseContext(),
"Error while capturing image", Toast.LENGTH_LONG)
.show();
return;
}
Log.v("log", "file "+out.getAbsolutePath());
File f = new File(out.getAbsolutePath());
try {
ExifInterface exif = new ExifInterface(out.getAbsolutePath());
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
//Toast.makeText(getApplicationContext(), ""+orientation, 1).show();
Log.v("log", "ort is "+orientation);
} catch (IOException e)
{
e.printStackTrace();
}
Bitmap photo =decodeFile(f,400,400);
}
这是decodeFile函数......
public static Bitmap decodeFile(File f,int WIDTH,int HIGHT){
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//The new size we want to scale to
final int REQUIRED_WIDTH=WIDTH;
final int REQUIRED_HIGHT=HIGHT;
//Find the correct scale value. It should be the power of 2.
int scale=1;
while(o.outWidth/scale/2>=REQUIRED_WIDTH && o.outHeight/scale/2>=REQUIRED_HIGHT)
scale*=2;
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}