我是 android 的新手，我想从图库中选择图像并想裁剪和发送服务器。当我从图库中选择图像并发送到服务器时。当我想使用裁剪方法时它已成功上传...然后..图像打开并且当我裁剪并单击确定..然后我的应用程序不幸停止了
请告诉我我在哪里做错了这是我的整个活动代码
public class MainActivity extends Activity {
private ImageView image;
private Button uploadButton;
private Bitmap bitmap;
private Button selectImageButton;
ByteArrayBody bab1 = null;
Uri selectedImge;
// number of images to select
private static final int PICK_IMAGE = 1;
/**
* called when the activity is first created
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// find the views
image = (ImageView) findViewById(R.id.uploadImage);
uploadButton = (Button) findViewById(R.id.uploadButton);
// on click select an image
selectImageButton = (Button) findViewById(R.id.selectImageButton);
selectImageButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
selectImageFromGallery();
}
});
// when uploadButton is clicked
uploadButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new ImageUploadTask().execute();
}
});
}
/**
* Opens dialog picker, so the user can select image from the gallery. The
* result is returned in the method <code>onActivityResult()</code>
*/
public void selectImageFromGallery() {
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
// intent.setAction(Intent.ACTION_GET_CONTENT);
intent.putExtra("crop", "true");
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 200);
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("scale", true);
intent.putExtra(MediaStore.EXTRA_OUTPUT, selectedImge);
intent.putExtra("outputFormat",
Bitmap.CompressFormat.JPEG.toString());
// intent.putExtra("return-data", true);
startActivityForResult(intent,
PICK_IMAGE);
}
/* startActivityForResult(Intent.createChooser(intent, "Select Picture"),
PICK_IMAGE);
}*/
/**
* Retrives the result returned from selecting image, by invoking the method
* <code>selectImageFromGallery()</code>
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE && resultCode == RESULT_OK
&& null != data) {
selectedImge = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImge,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
decodeFile(picturePath);
}
}
/**
* The method decodes the image file to avoid out of memory issues. Sets the
* selected image in to the ImageView.
*
* @param filePath
*/
public void decodeFile(String filePath) {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 1024;
// Find the correct scale value. It should be the power of 2.
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
bitmap = BitmapFactory.decodeFile(filePath, o2);
image.setImageBitmap(bitmap);
}
/**
* The class connects with server and uploads the photo
*
*
*/
class ImageUploadTask extends AsyncTask<Void, Void, String> {
private String webAddressToPost = "http://your-website-here.com";
// private ProgressDialog dialog;
private ProgressDialog dialog = new ProgressDialog(MainActivity.this);
@Override
protected void onPreExecute() {
dialog.setMessage("Uploading...");
dialog.show();
}
@Override
protected String doInBackground(Void... params) {
try {
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost("http://www.your domain.com/signup");
MultipartEntity entity = new MultipartEntity(
HttpMultipartMode.BROWSER_COMPATIBLE);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.JPEG, 75, bos);
byte[] data = bos.toByteArray();
// byte[] image=Base64.encode(data, Base64.DEFAULT);
bab1 = new ByteArrayBody(data, "profile.jpg");
//
entity.addPart("fullName", new StringBody("sammywaseem"));
entity.addPart("userName", new StringBody("samm"));
entity.addPart("dob", new StringBody("2014-09-09"));
entity.addPart("age", new StringBody("18"));
entity.addPart("gender", new StringBody("M"));
entity.addPart("interestIn", new StringBody("Both"));
entity.addPart("toMeet", new StringBody("Women"));
entity.addPart("email", new StringBody("mmmmmmmmii@gmail.com"));
entity.addPart("pwd", new StringBody("123456"));
entity.addPart("latitude", new StringBody("38.56525803"));
entity.addPart("longitude", new StringBody("71.98562622"));
if (bab1 != null) {
entity.addPart("uploaded_file", bab1);
}
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost,
localContext);
BufferedReader reader = new BufferedReader(
new InputStreamReader(
response.getEntity().getContent(), "UTF-8"));
String sResponse = reader.readLine();
return sResponse;
} catch (Exception e) {
// something went wrong. connection with the server error
}
return null;
}
@Override
protected void onPostExecute(String result)
{
dialog.dismiss();
Toast.makeText(getApplicationContext(), "file uploaded",
Toast.LENGTH_LONG).show();
}
}
}
这是我的 logcat 错误
09-25 11:36:58.719: E/AndroidRuntime(27221): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { (has extras) }} to activity {com.example.upload_image/com.example.upload_image.MainActivity}: java.lang.NullPointerException
09-25 11:36:58.719: E/AndroidRuntime(27221): at android.app.ActivityThread.deliverResults(ActivityThread.java:3149)
09-25 11:36:58.719: E/AndroidRuntime(27221): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3192)
09-25 11:36:58.719: E/AndroidRuntime(27221): Caused by: java.lang.NullPointerException
09-25 11:36:58.719: E/AndroidRuntime(27221): at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1094)
09-25 11:36:58.719: E/AndroidRuntime(27221): at android.content.ContentResolver.query(ContentResolver.java:354)