title: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
body: <p>Unable to pass data from one fragment to another using intent. Logic is fine .Please check the last parts of main activity where I have sent strings to other activity using putExtra.</p>
  
  <p>Here is the MainActivity.java  :</p>
  
  <pre><code>public class MainActivity extends Activity implements View.OnClickListener {
  EditText ed1,ed2,ed3,ed4,ed5,ed6;
  
  Button bt1;
  TextView tv1,tv2;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      ed1=(EditText)findViewById(R.id.editText);
      ed2=(EditText)findViewById(R.id.editText2);
      ed3=(EditText)findViewById(R.id.editText3);
      ed4=(EditText)findViewById(R.id.editText4);
      ed5=(EditText)findViewById(R.id.editText5);
      ed6=(EditText)findViewById(R.id.editText6);
      tv1=(TextView)findViewById(R.id.textView);
      tv2=(TextView)findViewById(R.id.textView2);
      bt1=(Button)findViewById(R.id.button);
      bt1.setOnClickListener(this);
  }
  public void onClick(View v)
  {
  
      String str1=ed1.getText().toString();
     String str2=ed2.getText().toString();
      String str3=ed3.getText().toString();
      String str4=ed4.getText().toString();
      String str5=ed5.getText().toString();
      String str6=ed6.getText().toString();
  
      if(str1.matches("") || str2.matches("") || str3.matches(""))
      {
          tv1.setText("One or more fields missing");
          if(str4.matches("") || str5.matches("") || str6.matches(""))
          {
              tv2.setText("One or more fields missing");
          }
      }
  
      else {
          int age1 = Integer.parseInt(ed2.getText().toString());
          int age2 = Integer.parseInt(ed5.getText().toString());
  
          int l1 = str1.length();
          str1 = str1.toLowerCase();
          str4 = str4.toLowerCase();
          int l2 = str4.length();
  
          int[] a = new int[26];
          int[] b = new int[26];
  
          for (int i = 0; i &lt; l1; i++) {
  
              char c = str1.charAt(i);
              int x = (int) c - 97;
              a[x]++;
          }
          for (int i = 0; i &lt; l2; i++) {
  
              char c = str4.charAt(i);
              int x = (int) c - 97;
              b[x]++;
          }
          int s=0,p;
          for(int i=0;i&lt;26;i++)
          {
              if(a[i]&gt;b[i])
                  p=a[i];
              else
                  p=b[i];
  
              s+=p;
          }
          if(l1&gt;l2)
              p=l1;
          else
              p=l2;
          double love1=(double)(s/p)*100;
          double love2=0.0,x;
  
          if(age1&gt;age2) {
              p = age1;
          x=age2;
          }
          else {
              p = age2;
              x=age1;
          }
          love2=(double)(x/p)*100;
  
          Intent in=new Intent(MainActivity.this,SecondActivity.class);
          String s1=""+love1;
          String s2=""+love2;
  
  
  
          in.putExtra("k1",str4);
         in.putExtra("k2",str4);
          in.putExtra("k3", love1);
          in.putExtra("k4",love2);
          startActivity(in);
          finish();
  
  
      }
  
  
  }
  
  
  }
  </code></pre>
  
  <p>Here is the code for SecondActivity.java :</p>
  
  <pre><code>public class SecondActivity extends Activity {
  
      TextView tv7,tv8,tv9,tv10;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_second);
  
  
      Intent in = getIntent();
  
      String s1 = in.getStringExtra("k1");
      String s2 = in.getStringExtra("k2");
      String s3 = in.getStringExtra("k3");
      String s4 = in.getStringExtra("k4");
      tv7=(TextView)findViewById(R.id.textView3);
      tv8=(TextView)findViewById(R.id.editText4);
      tv9=(TextView)findViewById(R.id.editText5);
      tv10=(TextView)findViewById(R.id.editText6);
  
      tv7.setText("Hello "+s1);
      tv8.setText("Your partner "+s2+" is really nice");
      tv9.setText("Your love percent based on name is "+s3);
      tv10.setText("Your love percent based on age is "+s4);
  }
  }
  </code></pre>
  
  <p>Here is the error I am getting :</p>
  
  <pre><code> Process: khurana.nikhil.lovemeter, PID: 4019
  java.lang.RuntimeException: Unable to start activity ComponentInfo{khurana.nikhil.lovemeter/khurana.nikhil.lovemeter.SecondActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
          at android.app.ActivityThread.access$800(ActivityThread.java:151)
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
          at android.os.Handler.dispatchMessage(Handler.java:102)
          at android.os.Looper.loop(Looper.java:135)
          at android.app.ActivityThread.main(ActivityThread.java:5257)
          at java.lang.reflect.Method.invoke(Native Method)
          at java.lang.reflect.Method.invoke(Method.java:372)
          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
   Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
          at khurana.nikhil.lovemeter.SecondActivity.onCreate(SecondActivity.java:32)
          at android.app.Activity.performCreate(Activity.java:5990)
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
  </code></pre>
  
  <p>Here is activity_second.XML:</p>
  
  <pre><code> &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"
  android:layout_height="match_parent"   android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:background="#cefcfd"
  tools:context="khurana.nikhil.lovemeter.SecondActivity"&gt;
  
  
  &lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text=""
      android:id="@+id/textView3"
      android:layout_alignParentTop="true"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="68dp" /&gt;
  
  &lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text=""
      android:id="@+id/textView4"
      android:layout_below="@+id/textView3"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="51dp" /&gt;
  
  &lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text=""
      android:id="@+id/textView5"
      android:layout_above="@+id/textView6"
      android:layout_alignStart="@+id/textView6"
      android:layout_marginBottom="84dp" /&gt;
  
  &lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text=""
      android:id="@+id/textView6"
      android:layout_alignParentBottom="true"
      android:layout_centerHorizontal="true"
      android:layout_marginBottom="51dp" /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>            </p>