java - Android CheckBox OnCheckListener 不起作用

Question

checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

            if (b){
                editText.setText(nm);
                editText1.setText(ps);
                Toast.makeText(Page1.this,"Checkbox Remember me is " + String.valueOf(b),Toast.LENGTH_LONG).show();
            }
        }
    });

我正在尝试创建一个包含两个 EditText 和一个复选框的登录页面。当选中复选框时，我试图将登录详细信息保存在共享首选项中。在我的代码中，我设置了 OnCheckedListner 来了解它是否被检查。但 boolean 值 b 始终为 true...为什么？ 请帮助我!

Page1 Activity 的完整代码:

public class Page1 extends AppCompatActivity {

Button button;
EditText editText,editText1;
CheckBox checkBox;
SharedPreferences sharedPreferences;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_page1);

    button = (Button)findViewById(R.id.bt1);
    editText = (EditText)findViewById(R.id.et1);
    editText1 = (EditText)findViewById(R.id.et2);
    checkBox = (CheckBox)findViewById(R.id.cb1);

    sharedPreferences = getSharedPreferences("MYSP", MODE_PRIVATE);
    final String nm = sharedPreferences.getString("uname", "");
    final String ps = sharedPreferences.getString("upass", "");
    final boolean saveLogin = sharedPreferences.getBoolean("save",false);
    final boolean logout = sharedPreferences.getBoolean("logout", false);

    if (!logout){
        Intent intent = new Intent(Page1.this, ProfilePage.class);
        startActivity(intent);
    }

    final boolean[] isChecked = new boolean[1];

    checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

            if (b){
                editText.setText(nm);
                editText1.setText(ps);
                Toast.makeText(Page1.this,"Checkbox Remember me is "+ String.valueOf(b) ,Toast.LENGTH_LONG).show();
            }
            else {
                Toast.makeText(Page1.this,"Checkbox Remember me is "+ String.valueOf(b),Toast.LENGTH_LONG).show();
            }
        }
    });

    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String name = editText.getText().toString();
            String pass = editText1.getText().toString();
            SharedPreferences.Editor editor = sharedPreferences.edit();
            if (isChecked[0]) {
                editor.putString("uname", name);
                editor.putString("upass", pass);
                editor.putBoolean("save", true);
                editor.putBoolean("logout", false);
                editor.commit();
            }
            else {
                editor.putString("uname", name);
                editor.putString("upass", pass);
                editor.putBoolean("logout", false);
                editor.commit();
            }
            Intent intent = new Intent(Page1.this, ProfilePage.class);
            startActivity(intent);
        }
    });
}

}

个人资料页面 Activity 代码:

public class ProfilePage extends AppCompatActivity {

Button button;
TextView textView;
SharedPreferences sharedPreferences;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_profile_page);

    button = (Button)findViewById(R.id.btn1);
    textView = (TextView)findViewById(R.id.tv1);
    sharedPreferences = getSharedPreferences("MYSP", MODE_PRIVATE);
    final String n = sharedPreferences.getString("uname", "");
    final String p = sharedPreferences.getString("upass", "");

    textView.setText("Welcome "+ n + "    ");

    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            SharedPreferences.Editor editor = sharedPreferences.edit();
            if (sharedPreferences.getBoolean("save", false)) {
                editor.putString("uname", n);
                editor.putString("upass", p);
                editor.putBoolean("logout", true);
                editor.commit();
            }
            else {
                editor.clear();
                editor.putBoolean("logout", true);
                editor.commit();
            }
            textView.setText("Logout Success!");
        }
    });
}

@Override
public void onBackPressed() {
    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_HOME);
    startActivity(intent);
}

}

Answer 1

您的代码仅处理b = true 的情况。修改您的代码以包含 else 部分，例如

checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

            if (b){
                editText.setText(nm);
                editText1.setText(ps);
                Toast.makeText(Page1.this,"Checkbox Remember me is true",Toast.LENGTH_LONG).show();
            }
           else{
                Toast.makeText(Page1.this,"Checkbox Remember me is false",Toast.LENGTH_LONG).show();
           }
        }
    });