Tag Archives: textwatcher

TextChangedListener Android

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TextWatcher

You can do the addTextChangedListener() method one time.

TextChangedListener Android

First step

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implements TextWatcher

Then you have a error
add unimplemented method

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@Override
public void afterTextChanged(Editable s) {
 
}
 
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
        int after) {
 
}
 
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
 
}

Now you can need declare you editText and to add listener in onCreate()

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public class MainActivity extends ActionBarActivity implements OnClickListener,TextWatcher {
 
    EditText mEditText;
    Button mButtonSave;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        mButtonSave = (Button) findViewById(R.id.activity_main_button_save);
        mEditText = (EditText) findViewById(R.id.activity_main_editText1);
 
        mEditText.setOnClickListener(this);
 
        mButtonSave.setEnabled(false);
        mEditText.addTextChangedListener(this);
    }
 
    @Override
    public void afterTextChanged(Editable s) {
 
    }
 
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count,
            int after) {
 
    }
 
    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        if (mEditText.getText().length() == 0) {
            mButtonSave.setEnabled(false);
        }else{
            mButtonSave.setEnabled(true);
        }
    }
 
}

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