Need number only soft keyboard?
Hi I need a soft keyboard with only numeric values 0 to 9 and Enter key. Shouldn\'t show anything other than these like . ,<
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I've faced the same problem , and i found tat there is no android keyboard like this available and that the only way is to implement your own. so i would like to share with you my implement and hopefully save you some valuable time:
i've created this xml , you can modify the colors,fonts and the size of the keyboard accourding to your needs:
i've created this fragment:
package com.galrom.keyboard; //replace it with your package import com.example.calculator.R;//import your own R class import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnLongClickListener; import android.widget.Button; public class KeyBoardFragment extends Fragment { private Button one_btn; private Button two_btn; private Button three_btn; private Button four_btn; private Button five_btn; private Button six_btn; private Button seven_btn; private Button eight_btn; private Button nine_btn; private Button zero_btn; private Button back_btn; private Button done_btn; private StringBuilder sb; private onKeyBoardEvent keyboardEventListener; private int maxLength=10; private int currentLength; public static KeyBoardFragment newInstance(String EditTextValue) { KeyBoardFragment fragment=new KeyBoardFragment(); Bundle bundle=new Bundle(); bundle.putString("et_value", EditTextValue); fragment.setArguments(bundle); return fragment; } @Override public void onAttach(Activity activity) { try{ keyboardEventListener=(onKeyBoardEvent)activity; } catch(ClassCastException e) { Log.e("ClassCastException in KeyBoardFragment row 50",activity.toString()+" must implement onKeyboardEvent"); e.printStackTrace(); } super.onAttach(activity); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub sb=new StringBuilder(getArguments().getString("et_value")); currentLength=sb.length(); View rootView=inflater.inflate(R.layout.numeric_keyboard_layout, container, false); one_btn=(Button)rootView.findViewById(R.id.one_btn); one_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub add("1"); } }); two_btn=(Button)rootView.findViewById(R.id.two_btn); two_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("2"); } }); three_btn=(Button)rootView.findViewById(R.id.three_btn); three_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("3"); } }); four_btn=(Button)rootView.findViewById(R.id.four_btn); four_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("4"); } }); five_btn=(Button)rootView.findViewById(R.id.five_btn); five_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("5"); } }); six_btn=(Button)rootView.findViewById(R.id.six_btn); six_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("6"); } }); seven_btn=(Button)rootView.findViewById(R.id.seven_btn); seven_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("7"); } }); eight_btn=(Button)rootView.findViewById(R.id.eight_btn); eight_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("8"); } }); nine_btn=(Button)rootView.findViewById(R.id.nine_btn); nine_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { add("9"); } }); zero_btn=(Button)rootView.findViewById(R.id.zero_btn); zero_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(sb.length()>0) add("0"); } }); back_btn=(Button)rootView.findViewById(R.id.back_btn); back_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(sb.length()>0) { currentLength--; sb.deleteCharAt((sb.length())-1); keyboardEventListener.backButtonPressed(sb.toString()); } } }); back_btn.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { currentLength=0; sb=new StringBuilder(); keyboardEventListener.backLongPressed(); return false; } }); done_btn=(Button)rootView.findViewById(R.id.done_btn); done_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { keyboardEventListener.doneButtonPressed(sb.toString()); } }); return rootView; } public interface onKeyBoardEvent { public void numberIsPressed(String total); public void doneButtonPressed(String total); public void backLongPressed(); public void backButtonPressed(String total); } public int getMaxLength() { return maxLength; } public void setMaxLength(int maxLength) { this.maxLength = maxLength; } public void add(String num) { currentLength++; if(currentLength<=maxLength) { sb.append(num); keyboardEventListener.numberIsPressed(sb.toString()); } else currentLength--; } }
3.the effect of a poping keyboard under the EditText when it is pressed is achived by creating an empty RelativeLayout that function as an container to the keyboard:
when the user press on the EditText the we add the fragment to the container and when he presses done we hide it. the keyboard fragment comunicate with the Activity with the onKeyBoardEvent interace. NOTE:the hosting activity must implement this interface or else a ClassCastException will be thown.
VERY IMPORTANT: i didn't handled the orientation change, if you change to ladscape while the keyboard is open it will crash, so either disable landscape mode or handle the orientation change to avoid a nullPointerException on the key_board_fragment.
this is the Activity that implemets the keyBoard:
package com.galrom.keyboard; import com.example.calculator.R; import android.content.res.Configuration; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.view.Menu; import android.view.View; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends FragmentActivity implements KeyBoardFragment.onKeyBoardEvent{ private EditText et; private KeyBoardFragment keyboard_fragment; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et=(EditText)findViewById(R.id.editText1); et.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if(keyboard_fragment==null) { keyboard_fragment=KeyBoardFragment.newInstance(et.getText().toString()); getSupportFragmentManager().beginTransaction().add(R.id.Key_board_container, keyboard_fragment).commit(); } else { if(keyboard_fragment.isVisible()) getSupportFragmentManager().beginTransaction().hide(keyboard_fragment).commit(); else { keyboard_fragment=KeyBoardFragment.newInstance(et.getText().toString()); getSupportFragmentManager().beginTransaction().add(R.id.Key_board_container, keyboard_fragment).commit(); } } }); } @Override public void numberIsPressed(String total) { // TODO Auto-generated method stub et.setText(total); } @Override public void doneButtonPressed(String total) { // TODO Auto-generated method stub et.setText(total); if(keyboard_fragment.isVisible()) getSupportFragmentManager().beginTransaction().hide(keyboard_fragment).commit(); } @Override public void backLongPressed() { // TODO Auto-generated method stub et.setText(""); } @Override public void backButtonPressed(String total) { // TODO Auto-generated method stub et.setText(total); } @Override public void onBackPressed() { // TODO Auto-generated method stub if(keyboard_fragment!=null) { if(keyboard_fragment.isVisible()) getSupportFragmentManager().beginTransaction().remove(keyboard_fragment).commit(); else super.onBackPressed(); } else super.onBackPressed(); } }and the last thing: to disable the poping of the standart keyboard of android i've created an CustomEditText that simply returns false at: onCheckIsTextEditor() , this is the CustomEditText class:
package com.galrom.keyboard; import android.content.Context; import android.util.AttributeSet; import android.widget.EditText; public class EditTextNoKeyBoard extends EditText { public EditTextNoKeyBoard(Context context) { super(context); } public EditTextNoKeyBoard(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public EditTextNoKeyBoard(Context context, AttributeSet attrs) { super(context, attrs); } @Override public boolean onCheckIsTextEditor() { // TODO Auto-generated method stub return false; } }Hope it helped you out... if you have suggestions for improvement i will be happy to hear. Gal.
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