Question

在使用两个不同的TextWatchers（一个用于名称，一个用于数字）验证六个EditTexts之后，我想启用我的“Fertig”按钮。因此我添加了一些变量[...]有效以检查是否满足所有条件。我是否必须更改if查询的位置？

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.EditText;

import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class MainActivity extends Activity {

    private TextView nachricht;
    private Button weiterFertig;
    private EditText vorname;
    private EditText nachname;
    private EditText strasse;
    private EditText nummer;
    private EditText plz;
    private EditText stadt;
    private boolean ersterKlick;
    public boolean vnameValid;
    public boolean nnameValid;
    public boolean strasseValid;
    public boolean stadtValid;
    public boolean nummerValid;
    public boolean plzValid;





    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        nachricht = (TextView) findViewById(R.id.nachricht);
        weiterFertig = (Button) findViewById(R.id.weiter_Fertig);

        vorname = (EditText) findViewById(R.id.vorname);
        nachname = (EditText) findViewById(R.id.nachname);
        strasse = (EditText) findViewById(R.id.strasse);
        nummer = (EditText) findViewById(R.id.nummer);
        plz = (EditText) findViewById(R.id.plz);
        stadt = (EditText) findViewById(R.id.stadt);

        ersterKlick = true;
        vnameValid = false;
        nnameValid = false;
        strasseValid = false;
        stadtValid = false;
        nummerValid = false;
        plzValid = false;

        nachricht.setText(R.string.willkommen);
        weiterFertig.setText(R.string.weiter);
        weiterFertig.setEnabled(false);

        weiterFertig.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (ersterKlick) {
                    nachricht.setText(getString(R.string.hallo, vorname.getText(), nachname.getText(), strasse.getText(), nummer.getText(), plz.getText(), stadt.getText()));

                    vorname.setVisibility(View.INVISIBLE);
                    nachname.setVisibility(View.INVISIBLE);
                    strasse.setVisibility(View.INVISIBLE);
                    nummer.setVisibility(View.INVISIBLE);
                    plz.setVisibility(View.INVISIBLE);
                    stadt.setVisibility(View.INVISIBLE);

                    weiterFertig.setText(R.string.fertig);
                    ersterKlick = false;
                } else {
                    finish();
                }

            }
        });

        /*
         * Validator1
         */
        TextWatcher numberChecker = new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence number, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence number, int start, int before, int count) {
            }

            @Override
            public void afterTextChanged(Editable number) {
                Pattern p = Pattern.compile("[0-9]{2,}");
                Matcher m = p.matcher(number);

                if (number.hashCode() == nummer.getText().hashCode()){
                    if (m.find()){
                        nummerValid = true;
                    } else{
                        nummerValid = false;
                    }
                }

                if (number.hashCode() == plz.getText().hashCode()){
                    if (m.find()){
                        plzValid = true;
                    } else{
                        plzValid = false;
                    }
                }

            }
        };

        /*
         * Validator2
         */

        TextWatcher inputChecker = new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence input, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence input, int start, int before, int count) {
            }

            @Override
            public void afterTextChanged(Editable input) {
                Pattern p = Pattern.compile("^[a-zA-ZäöüÄÖÜß ]{3,}$");
                Matcher m = p.matcher(input);

                if (input.hashCode() == vorname.getText().hashCode()) {
                    if (m.find()) {
                        vnameValid = true;
                    } else {
                        vnameValid = false;
                    }
                }

                if (input.hashCode() == nachname.getText().hashCode()) {
                    if (m.find()) {
                        nnameValid = true;
                    } else {
                        nnameValid = false;
                    }
                }

                if (input.hashCode() == strasse.getText().hashCode()) {
                    if (m.find()) {
                        strasseValid = true;
                    } else {
                        strasseValid = false;
                    }
                }

                if (input.hashCode() == stadt.getText().hashCode()) {
                    if (m.find()) {
                        stadtValid = true;
                    } else {
                        stadtValid = false;
                    }
                }
            }
        };


        vorname.addTextChangedListener(inputChecker);
        nachname.addTextChangedListener(inputChecker);
        strasse.addTextChangedListener(inputChecker);
        stadt.addTextChangedListener(inputChecker);

        nummer.addTextChangedListener(numberChecker);
        plz.addTextChangedListener(numberChecker);

        if (vnameValid && nnameValid && strasseValid && stadtValid && nummerValid && plzValid) {
            weiterFertig.setEnabled(true);
        } else {
            weiterFertig.setEnabled(false);
        }

    }
}

Answer 1

您应该将该条件移动到另一个函数，并在两个验证器中调用它。当事件被触发时，他们会调用验证器并检查更改按钮的条件。

Answer 2

您应该检查TextWatcher

中的启用或禁用按钮

protected void onCreate(Bundle savedInstanceState) {
  .....
    TextWatcher numberChecker = new TextWatcher() {
        Override
        public void beforeTextChanged(CharSequence number, int start, int count, int after) {

        }

        @
        Override
        public void onTextChanged(CharSequence number, int start, int before, int count) {}

        @
        Override
        public void afterTextChanged(Editable number) {
            ...
            checkEnableOrDisable();
        }
    };
    TextWatcher inputChecker = new TextWatcher() {
        Override
        public void beforeTextChanged(CharSequence number, int start, int count, int after) {

        }

        @
        Override
        public void onTextChanged(CharSequence number, int start, int before, int count) {}

        @
        Override
        public void afterTextChanged(Editable number) {
            ...
            checkEnableOrDisable();
        }
    };
    .....
}



public void checkEnableOrDisable() {
    if (vnameValid && nnameValid && strasseValid && stadtValid && nummerValid && plzValid) {
        weiterFertig.setEnabled(true);
    } else {
        weiterFertig.setEnabled(false);
    }
}

希望这个帮助

使用2个TextWatchers验证后的setEnable按钮

2 个答案: