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How to align Title at center of ActionBar in Android

How to Align Title At Center of Action Bar in Android 
                                                                                                                                             

 @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("DashBoard");
}



 Activity 
 public void setTitle(String title){
    getSupportActionBar().setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    TextView textView = new TextView(this);
    textView.setText(title);
    textView.setTextSize(20);
    textView.setTypeface(null, Typeface.BOLD);
    textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
    textView.setGravity(Gravity.CENTER);
    textView.setTextColor(getResources().getColor(R.color.white));
    getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
    getSupportActionBar().setCustomView(textView);
} 
 Fragment
public void setTitle(String title){
    ((AppCompatActivity)getActivity()).getSupportActionBar().setHomeButtonEnabled(true);
    ((AppCompatActivity)getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    TextView textView = new TextView(getActivity());
    textView.setText(title);
    textView.setTextSize(20);
    textView.setTypeface(null, Typeface.BOLD);
    textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
    textView.setGravity(Gravity.CENTER);
    textView.setTextColor(getResources().getColor(R.color.white));
    ((AppCompatActivity)getActivity()).getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
    ((AppCompatActivity)getActivity()).getSupportActionBar().setCustomView(textView);
}
                                                                                                                                                       

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