java.lang.NullPointerException: Versuch, virtuelle Methode 'android.text.Editable android.widget.EditText.getText()' auf einem Nullobjekt Referenz

Question

aufrufen Ich möchte Edittext von der ersten Aktivität auf neue Secondactivity View Text setzen.

Was tun, wenn ich eine erro wie dies in android-Monitor angezeigt habe:

com.example.xx.DrawerAddAd.seeAdd(DrawerAddAd.java:129) 

com.example.xx.DrawerAddAd.access$100(DrawerAddAd.java:40) 

com.example.xx.DrawerAddAd$2.onClick(DrawerAddAd.java:116) 

auch: Render Problem: Ressource kann nicht @ id/sichtbar
Tipps beheben: Versuchen Sie, das auffrischen Layout.

DrawerAddAd Klassencode:

package com.example.xx.drawer; 

import android.app.Activity; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.Camera; 
import android.os.Environment; 
import android.provider.MediaStore; 
import android.support.design.widget.TextInputEditText; 
import android.support.design.widget.TextInputLayout; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.text.Editable; 
import android.text.TextUtils; 
import android.text.TextWatcher; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.CheckBox; 
import android.widget.EditText; 
import android.widget.ImageButton; 
import android.widget.ImageView; 
import android.widget.Spinner; 

import com.example.xx.R; 

import com.example.xxx.model.POJO.view.ProductDetails; 

import java.io.ByteArrayOutputStream; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.util.ArrayList; 

import butterknife.BindView; 

public class DrawerAddAd extends AppCompatActivity { 

    public static ArrayList<String> fragments = new ArrayList<>(); 
    private final int REQUEST_CODE = 1; 

    private ImageButton camera_imageButton; 
    private Spinner spinner_category; 
    private Button button_seeAd_product; 
    private Button button_add_product; 

    @BindView(R.id.title_Ad_editText) 
    EditText titleAd_editText; 

    @BindView(R.id.text_Ad_editText) 
    EditText textAd_editText; 

    @BindView(R.id.price_editText) 
    EditText price_editText; 

    @BindView(R.id.checkBox_season) 
    CheckBox checkBox_season; 

    @BindView(R.id.checkBox_year) 
    CheckBox checkBox_year; 

    @BindView(R.id.checkBox_detail) 
    CheckBox checkBox_detail; 

    @BindView(R.id.checkBox_wholesale) 
    CheckBox checkBox_whoLesale; 

    private int REQUEST_CAMERA = 1, SELECT_FILE = 1; 
    private Button btnSelect; 
    private ImageView Image; 
    private String userChosenTask; 

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

     final TextInputLayout title_ad_layout = (TextInputLayout) findViewById(R.id.add_title_ad_layout); 
     final TextInputLayout text_ad_layout = (TextInputLayout) findViewById(R.id.add_text_ad_layout); 
     final TextInputEditText title_Ad_editText = (TextInputEditText) findViewById(R.id.title_Ad_editText); 
     final TextInputEditText text_Ad_editText = (TextInputEditText) findViewById(R.id.text_Ad_editText); 
     setTextWatcher(title_Ad_editText, title_ad_layout); 
     setTextWatcher(text_Ad_editText, text_ad_layout); 

     spinner_category = (Spinner) findViewById(R.id.spinner_category); 
     button_seeAd_product = (Button) findViewById(R.id.button_seeAd_product); 
     button_add_product = (Button) findViewById(R.id.button_ad_product); 

     camera_imageButton = (ImageButton) findViewById(R.id.camera_imageButton); 
     camera_imageButton.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       selectImage(); 
      } 
     }); 

     button_seeAd_product.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       boolean error = false; 

       if (TextUtils.isEmpty(title_Ad_editText.getText().toString())) { 
        title_ad_layout.setError(getString(R.string.empty_field)); 
        error = true; 
       } 
       if (TextUtils.isEmpty(text_Ad_editText.getText().toString())) { 
        text_ad_layout.setError(getString(R.string.empty_field)); 
        error = true; 
       } 
       if (!error) { 
        seeAdd(); 
       } 
      } 
     }); 

     ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.fragments, R.layout.support_simple_spinner_dropdown_item); 
     adapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item); 
     spinner_category.setAdapter(adapter); 
    } 

    private void seeAdd() { 

     Intent intent = new Intent(getApplicationContext(), ProductDetails.class); 
     intent.putExtra("title",titleAd_editText.getText().toString()); 
     intent.putExtra("text", textAd_editText.getText().toString()); 

//  ImageView imageView = 
//  String title = titleAd_editText.getText().toString(); 
//  String text = textAd_editText.getText().toString(); 
//  String price = price_editText.getText().toString(); 
// 
// 
//  intent.putExtra("titleAdd", title); 
//  intent.putExtra("textAdd", text); 
//  intent.putExtra("price", price); 

     startActivity(intent); 

    } 

    private void onCheckboxClicked(View view) { 
     boolean checked = ((CheckBox) view).isChecked(); 

     switch (view.getId()) { 
      case R.id.checkBox_season: 
       if (checked) { 

       } else { 

       } 
       break; 
      case R.id.checkBox_year: 
       if (checked) { 

       } else { 

       } 
       break; 
      case R.id.checkBox_detail: 
       if (checked) { 

       } else { 

       } 
       break; 
      case R.id.checkBox_wholesale: 
       if (checked) { 

       } else { 

       } 
       break; 
     } 
    } 

    private void setTextWatcher(final TextInputEditText editText, final TextInputLayout inputLayout) { 
     editText.addTextChangedListener(new TextWatcher() { 
      @Override 
      public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { 
      } 

      @Override 
      public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { 
       if (inputLayout.isErrorEnabled()) { 
        inputLayout.setErrorEnabled(false); 
       } 
      } 

      @Override 
      public void afterTextChanged(Editable editable) { 
      } 
     }); 
    } 


    private void selectImage() { 
     final CharSequence[] items = {"Zrób zdjęcie", "Wybierz z katalogu", "Anuluj"}; 
     AlertDialog.Builder builder = new AlertDialog.Builder(DrawerAddAd.this); 
     builder.setTitle("Dodaj zdjęcie"); 
     builder.setItems(items, new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int item) { 
       boolean result = Utility.checkPermission(DrawerAddAd.this); 
       if (items[item].equals("Zrób zdjęcie")) { 
        userChosenTask = "Zrób zdjęcie"; 
        if (result) 
         cameraIntent(); 
       } else if (items[item].equals("Wybierz z katalogu")) { 
        userChosenTask = "Wybierz z katalogu"; 
        if (result) 
         galleryIntent(); 
       } else if (items[item].equals("Anuluj")) { 
        dialog.dismiss(); 
       } 
      } 
     }); 
     builder.show(); 
    } 

    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (resultCode == Activity.RESULT_OK) { 
      if (requestCode == SELECT_FILE) 
       onSelectFromGalleryResult(data); 
      else if (requestCode == REQUEST_CAMERA) 
       onCaptureImageResult(data); 
     } 
    } 

    private void cameraIntent() { 
     Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
     startActivityForResult(intent, REQUEST_CAMERA); 
    } 

    private void galleryIntent() { 
     Intent intent = new Intent(); 
     intent.setType("image/*"); 
     intent.setAction(Intent.ACTION_GET_CONTENT); 
     startActivityForResult(Intent.createChooser(intent, "Wybierz plik"), SELECT_FILE); 
    } 


    private void onSelectFromGalleryResult(Intent data) { 
     Bitmap bm = null; 
     if (data != null) { 
      try { 
       bm = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), data.getData()); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
     Image.setImageBitmap(bm); 
    } 

    private void onCaptureImageResult(Intent data) { 
     Bitmap thumbnail = (Bitmap) data.getExtras().get("data"); 
     ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 
     thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes); 
     File destination = new File(Environment.getExternalStorageDirectory(), 
       System.currentTimeMillis() + ".jpg"); 
     FileOutputStream fo; 
     try { 
      destination.createNewFile(); 
      fo = new FileOutputStream(destination); 
      fo.write(bytes.toByteArray()); 
      fo.close(); 
     } catch (FileNotFoundException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     Image.setImageBitmap(thumbnail); 
    } 
} 

Produktdetails Klassencode:

package com.example.xxx.model.POJO.view; 

import android.content.Intent; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 
import android.widget.TextView; 

import com.example.xxx.R; 

public class ProductDetails extends AppCompatActivity { 

    private TextView title, text, price, date; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_product_details); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     title = (TextView) findViewById(R.id.title_textView); 
     text = (TextView) findViewById(R.id.text_textView); 

     Intent intent = getIntent(); 
//  Bundle bundle = getIntent().getExtras(); 

     String title_textView = intent.getStringExtra("titleAdd"); 
     String text_textView = intent.getStringExtra("textAdd"); 

     title.setText(title_textView); 
     text.setText(text_textView); 


//  price = (TextView) findViewById(R.id.price_textView); 
//  date = (TextView) findViewById(R.id.date_textView); 

//  String titleAdd = bundle.getString("titleAdd"); 
//  String textAdd = bundle.getString("textAdd"); 
//  String price = bundle.getString("price"); 
//  title.setText(titleAdd); 
//  text.setText(textAdd); 
//  price.setText(price); 


     FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
     fab.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) 
         .setAction("Action", null).show(); 
      } 
     }); 
    } 


} 

Ich weiß nicht, was zu tun ist ...

Danke, Slawek.

Answer 1

bedeutet title_Ad_editText ist null. Überprüfen Sie Ihre XML-Datei und title_Ad_editText Variable.

Answer 2

paar Dinge, die ich sehen konnte, wiederholen dies:

private void seeAdd() { 

    Intent intent = new Intent(getApplicationContext(), ProductDetails.class); 
    intent.putExtra("title",titleAd_editText.getText().toString()); 
    intent.putExtra("text", textAd_editText.getText().toString()); 

dies:

private void seeAdd() { 

    Intent intent = new Intent(DrawerAddAd.this, ProductDetails.class); 
    intent.putExtra("title",titleAd_editText.getText().toString()); 
    intent.putExtra("text", textAd_editText.getText().toString()); 

dann in Ihrer Absicht, Ihnen die zusätzliche genau wie Set aufrufen müssen, dies ändern:

Intent intent = getIntent(); 
//  Bundle bundle = getIntent().getExtras(); 

    String title_textView = intent.getStringExtra("titleAdd"); 
    String text_textView = intent.getStringExtra("textAdd"); 

dazu:

Intent intent = getIntent(); 
//  Bundle bundle = getIntent().getExtras(); 

    String title_textView = intent.getStringExtra("title"); 
    String text_textView = intent.getStringExtra("text");