title: java.lang.NullPointerException: Attempt to invoke virtual method on a null object reference, while its not null
body: <p>I am trying to use a variable from 1 class into another class so i do not have to make a URL call and a parser all over again but i get the error in the title and i do not understand why. The name variable i have as testing is not empty, it has a value that it has taken from a different class.</p>
  
  <p><strong>CoatJacket Code :</strong></p>
  
  <pre><code>package com.example.ma18uus.myapplication;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.os.Bundle;
  import android.provider.MediaStore;
  import android.support.v7.app.AppCompatActivity;
  import android.view.Menu;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.widget.Button;
  import android.widget.TextView;
  
  public class CoatsJackets extends AppCompatActivity {
  
      TextView text;
  
      Button btn;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_coats_jackets);
          btn=(Button)findViewById(R.id.AddCoatsJackets);
          btn.setOnClickListener(new OnClickListener() {
  
              public void onClick(View v) {
                  Intent i=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
                  startActivity(i);
              }
          });
  
          WeatherConditions recievingInfo = new WeatherConditions();
          recievingInfo.info();
      }
  
      public void getInfo(String recievedInfo){
  
          text = (TextView)findViewById(R.id.grabber);
          text.setText(recievedInfo);
  
      }
  
  
  }
  </code></pre>
  
  <p><strong>WeatherCondition Code :</strong></p>
  
  <pre><code>package com.example.ma18uus.myapplication;
  
  public class WeatherConditions {
  
      public String name, wind_mph, wind_kph, celsius, feelsCelsius, fahrenheit, feelsFahrenheit, humidity, condition_text;
  
      public void info(){
  
          CoatsJackets sendInfo = new CoatsJackets();
          sendInfo.getInfo(name);
      }
  }
  
  </code></pre>
  
  <p><strong>Error Output :</strong></p>
  
  <pre><code>
  01/27 07:47:00: Launching 'app' on Pixel 2 API 29.
  $ adb shell am start -n "com.example.ma18uus.myapplication/com.example.ma18uus.myapplication.ClothesApp" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
  Waiting for process to come online...
  Connected to process 26822 on device 'emulator-5554'.
  Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
  I/s.myapplicatio: Not late-enabling -Xcheck:jni (already on)
  W/main: type=1400 audit(0.0:332): avc: granted { read } for name="u:object_r:net_dns_prop:s0" dev="tmpfs" ino=8398 scontext=u:r:untrusted_app_25:s0:c512,c768 tcontext=u:object_r:net_dns_prop:s0 tclass=file
  E/s.myapplicatio: Unknown bits set in runtime_flags: 0x8000
  W/s.myapplicatio: Unexpected CPU variant for X86 using defaults: x86
  I/s.myapplicatio: The ClassLoaderContext is a special shared library.
  D/libEGL: Emulator has host GPU support, qemu.gles is set to 1.
  W/libc: Unable to set property "qemu.gles" to "1": connection failed; errno=13 (Permission denied)
  W/RenderThread: type=1400 audit(0.0:333): avc: denied { write } for name="property_service" dev="tmpfs" ino=8445 scontext=u:r:untrusted_app_25:s0:c512,c768 tcontext=u:object_r:property_socket:s0 tclass=sock_file permissive=0
  D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
  D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
  D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
  W/s.myapplicatio: Accessing hidden method Landroid/view/View;-&gt;computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed)
  W/s.myapplicatio: Accessing hidden method Landroid/view/ViewGroup;-&gt;makeOptionalFitsSystemWindows()V (greylist, reflection, allowed)
  D/HostConnection: HostConnection::get() New Host Connection established 0xdff5e190, tid 26856
  D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_vulkan ANDROID_EMU_deferred_vulkan_commands ANDROID_EMU_vulkan_null_optional_strings ANDROID_EMU_vulkan_create_resources_with_requirements ANDROID_EMU_YUV420_888_to_NV21 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_3_0 
  W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
  D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 0 0
  D/EGL_emulation: eglCreateContext: 0xdff1a240: maj 3 min 0 rcv 3
  D/EGL_emulation: eglMakeCurrent: 0xdff1a240: ver 3 0 (tinfo 0xdff0f7c0)
  W/Gralloc3: mapper 3.x is not supported
  D/HostConnection: createUnique: call
  D/HostConnection: HostConnection::get() New Host Connection established 0xdff5e460, tid 26856
  D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_vulkan ANDROID_EMU_deferred_vulkan_commands ANDROID_EMU_vulkan_null_optional_strings ANDROID_EMU_vulkan_create_resources_with_requirements ANDROID_EMU_YUV420_888_to_NV21 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_3_0 
  D/eglCodecCommon: allocate: Ask for block of size 0x1000
  D/eglCodecCommon: allocate: ioctl allocate returned offset 0x3ff805000 size 0x2000
  D/EGL_emulation: eglMakeCurrent: 0xdff1a240: ver 3 0 (tinfo 0xdff0f7c0)
  D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 1 0
  W/ActivityThread: handleWindowVisibility: no activity for token android.os.BinderProxy@dffd53e
  D/AndroidRuntime: Shutting down VM
  E/AndroidRuntime: FATAL EXCEPTION: main
      Process: com.example.ma18uus.myapplication, PID: 26822
      java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ma18uus.myapplication/com.example.ma18uus.myapplication.CoatsJackets}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
          at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
          at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
          at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
          at android.os.Handler.dispatchMessage(Handler.java:107)
          at android.os.Looper.loop(Looper.java:214)
          at android.app.ActivityThread.main(ActivityThread.java:7356)
          at java.lang.reflect.Method.invoke(Native Method)
          at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
       Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
          at android.support.v7.app.AppCompatDelegateImplBase.&lt;init&gt;(AppCompatDelegateImplBase.java:120)
          at android.support.v7.app.AppCompatDelegateImplV9.&lt;init&gt;(AppCompatDelegateImplV9.java:155)
          at android.support.v7.app.AppCompatDelegateImplV11.&lt;init&gt;(AppCompatDelegateImplV11.java:31)
          at android.support.v7.app.AppCompatDelegateImplV14.&lt;init&gt;(AppCompatDelegateImplV14.java:55)
          at android.support.v7.app.AppCompatDelegateImplV23.&lt;init&gt;(AppCompatDelegateImplV23.java:33)
          at android.support.v7.app.AppCompatDelegateImplN.&lt;init&gt;(AppCompatDelegateImplN.java:33)
          at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:201)
          at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:185)
          at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:519)
          at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:190)
          at com.example.ma18uus.myapplication.CoatsJackets.getInfo(CoatsJackets.java:39)
          at com.example.ma18uus.myapplication.WeatherConditions.info(WeatherConditions.java:10)
          at com.example.ma18uus.myapplication.CoatsJackets.onCreate(CoatsJackets.java:34)
          at android.app.Activity.performCreate(Activity.java:7802)
          at android.app.Activity.performCreate(Activity.java:7791)
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409) 
          at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83) 
          at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
          at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016) 
          at android.os.Handler.dispatchMessage(Handler.java:107) 
          at android.os.Looper.loop(Looper.java:214) 
          at android.app.ActivityThread.main(ActivityThread.java:7356) 
          at java.lang.reflect.Method.invoke(Native Method) 
          at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) 
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) 
  Process 26822 terminated.
  
  </code></pre>