Question

我必须将我的图像上传到配置文件片段中的应用程序，所以我使用了两个按钮。一个从图库中选择，一个用于上传。当我执行我的代码时，我可以打开图库来选择图像，但是一旦我点击按钮，我的应用程序就会关闭。这是我得到的error：

致命的例外：主要处理：com.example.hp.truckloaderadmin，PID：32605 java.lang.RuntimeException：传递结果失败 ResultInfo {who = null，request = 1，result = -1，data = Intent { DAT =含量：//com.android.providers.media.documents/document/image：5746 flg = 0x1 VirtualScreenParam = Params {mDisplayId = -1，null， mFlags = 0x00000000）}}}到活动 {com.example.hp.truckloaderadmin / com.example.hp.truckloaderadmin.common.common.FragProfile}： java.lang.NullPointerException：尝试调用虚方法'void android.widget.ImageView.setImageBitmap（android.graphics.Bitmap）'上一个 null对象引用在android.app.ActivityThread.deliverResults（ActivityThread.java:5008）在 android.app.ActivityThread.handleSendResult（ActivityThread.java:5051）在android.app.ActivityThread.access $ 1600（ActivityThread.java:229）在 android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1875）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:148）在android.app.ActivityThread.main（ActivityThread.java:7410） at java.lang.reflect.Method.invoke（Native Method）在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1230）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1120）引起：java.lang.NullPointerException：尝试调用虚拟方法'无效 android.widget.ImageView.setImageBitmap（android.graphics.Bitmap）'上一个 null对象引用在 com.example.hp.truckloaderadmin.common.common.FragProfile.onActivityResult（FragProfile.java:103）在android.app.Activity.dispatchActivityResult（Activity.java:7165）在android.app.ActivityThread.deliverResults（ActivityThread.java:5004）在 android.app.ActivityThread.handleSendResult（ActivityThread.java:5051）在android.app.ActivityThread.access $ 1600（ActivityThread.java:229）在 android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1875）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:148）在android.app.ActivityThread.main（ActivityThread.java:7410） at java.lang.reflect.Method.invoke（Native Method）

这是我的代码：

public class FragProfile extends AppCompatActivity {
Bitmap bitmap;
boolean check = true;
FloatingActionButton imgUp;
FloatingActionButton imgSel;
Button update;
EditText imageName;
ImageView image;
ProgressDialog progressDialog ;
String ImageName = "image_name" ;
String GetImageNameEditText;
String ImagePath = "image_path" ;
String ServerUploadPath ="http://192.168.43.38/internship_project/android_web_services/image.php";

@Nullable
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.frag_profile);
    imgSel=(FloatingActionButton)findViewById(R.id.fabSelect);
    imageName = (EditText)findViewById(R.id.editTextImageName);
    imgUp=(FloatingActionButton)findViewById(R.id.fabUpload);
    image=(ImageView)findViewById(R.id.image);
    imgUp.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            GetImageNameEditText = imageName.getText().toString();
            ImageUploadToServerFunction();

        }
    });
    imgSel.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, "Select Image From Gallery"), 1);
        }
    });
}
@Override
public void onActivityResult(int RC, int RQC, Intent I) {

    super.onActivityResult(RC, RQC, I);

    if (RC == 1 && RQC == RESULT_OK && I != null && I.getData() != null) {

        Uri uri = I.getData();

        try {

            bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);

            image.setImageBitmap(bitmap);

        } catch (IOException e) {

            e.printStackTrace();
        }
    }
}

public void ImageUploadToServerFunction(){

    ByteArrayOutputStream byteArrayOutputStreamObject ;

    byteArrayOutputStreamObject = new ByteArrayOutputStream();

    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStreamObject);

    byte[] byteArrayVar = byteArrayOutputStreamObject.toByteArray();

    final String ConvertImage = Base64.encodeToString(byteArrayVar, Base64.DEFAULT);

    class AsyncTaskUploadClass extends AsyncTask<Void,Void,String> {

        @Override
        protected void onPreExecute() {

            super.onPreExecute();

            progressDialog = ProgressDialog.show(FragProfile.this,"Image is Uploading","Please Wait",false,false);
        }

        @Override
        protected void onPostExecute(String string1) {

            super.onPostExecute(string1);

            // Dismiss the progress dialog after done uploading.
            progressDialog.dismiss();

            // Printing uploading success message coming from server on android app.
            Toast.makeText(FragProfile.this,string1,Toast.LENGTH_LONG).show();

            // Setting image as transparent after done uploading.
            image.setImageResource(android.R.color.transparent);


        }

        @Override
        protected String doInBackground(Void... params) {

            ImageProcessClass imageProcessClass = new ImageProcessClass();

            HashMap<String,String> HashMapParams = new HashMap<String,String>();

            HashMapParams.put(ImagePath, ConvertImage);

            String FinalData = imageProcessClass.ImageHttpRequest(ServerUploadPath, HashMapParams);

            return FinalData;
        }
    }
    AsyncTaskUploadClass AsyncTaskUploadClassOBJ = new AsyncTaskUploadClass();

    AsyncTaskUploadClassOBJ.execute();
}

public class ImageProcessClass{

    public String ImageHttpRequest(String requestURL,HashMap<String, String> PData) {

        StringBuilder stringBuilder = new StringBuilder();

        try {

            URL url;
            HttpURLConnection httpURLConnectionObject ;
            OutputStream OutPutStream;
            BufferedWriter bufferedWriterObject ;
            BufferedReader bufferedReaderObject ;
            int RC ;

            url = new URL(requestURL);

            httpURLConnectionObject = (HttpURLConnection) url.openConnection();

            httpURLConnectionObject.setReadTimeout(19000);

            httpURLConnectionObject.setConnectTimeout(19000);

            httpURLConnectionObject.setRequestMethod("POST");

            httpURLConnectionObject.setDoInput(true);

            httpURLConnectionObject.setDoOutput(true);

            OutPutStream = httpURLConnectionObject.getOutputStream();

            bufferedWriterObject = new BufferedWriter(

                    new OutputStreamWriter(OutPutStream, "UTF-8"));

            bufferedWriterObject.write(bufferedWriterDataFN(PData));

            bufferedWriterObject.flush();

            bufferedWriterObject.close();

            OutPutStream.close();

            RC = httpURLConnectionObject.getResponseCode();

            if (RC == HttpsURLConnection.HTTP_OK) {

                bufferedReaderObject = new BufferedReader(new InputStreamReader(httpURLConnectionObject.getInputStream()));

                stringBuilder = new StringBuilder();

                String RC2;

                while ((RC2 = bufferedReaderObject.readLine()) != null){

                    stringBuilder.append(RC2);
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return stringBuilder.toString();
    }

    private String bufferedWriterDataFN(HashMap<String, String> HashMapParams) throws UnsupportedEncodingException {

        StringBuilder stringBuilderObject;

        stringBuilderObject = new StringBuilder();

        for (Map.Entry<String, String> KEY : HashMapParams.entrySet()) {

            if (check)

                check = false;
            else
                stringBuilderObject.append("&");

            stringBuilderObject.append(URLEncoder.encode(KEY.getKey(), "UTF-8"));

            stringBuilderObject.append("=");

            stringBuilderObject.append(URLEncoder.encode(KEY.getValue(), "UTF-8"));
        }

        return stringBuilderObject.toString();
    }

}

}

在个人资料

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