每当我点击按钮时，我的应用程序冻结

Question

我正在为我的Android应用程序创建一个注册/登录页面。这是我的代码。我使用了共享偏好。代码没有错误。但是每当我在eclipse中运行它时，只要我点击注册按钮就会冻结，并且发生错误＆＃34;确认透视切换＆＃34;

enter code here

MainActivity.java
package com.example.login;
public class MainActivity extends Activity {
EditText pass;
Button login,signup;
SharedPreferences sharedpreference;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
     pass=(EditText)findViewById(R.id.editText1);
     login=(Button)findViewById(R.id.button1);
     signup=(Button)findViewById(R.id.button2);

     login.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View arg0) {
            sharedpreference= getSharedPreferences("MyPREFERENCES", MODE_PRIVATE); 
            String restoredText = sharedpreference.getString("Name", "password");
            if(pass.getText().toString().equals(restoredText)){
                Toast toast = Toast.makeText(getApplicationContext(), "success",Toast.LENGTH_LONG);
                toast.show();
                Intent intent = new Intent(MainActivity.this, JournalActivity.class);
                startActivity(intent);
            }
            else{
                Toast toast = Toast.makeText(getApplicationContext(), "INVALID PASSWORD",Toast.LENGTH_LONG);
                toast.show();
            }
        }
    });
     signup.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            // TODO Auto-generated method stub
        Intent sign= new Intent(MainActivity.this,SignupActivity.class);
        startActivity(sign);

        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

}

SignupActivity.java

package com.example.login;

public class SignupActivity extends Activity
{

        EditText editTextUserName,editTextPassword,editTextConfirmPassword;
        Button btnCreateAccount;
        SharedPreferences pref;
        @Override
        protected void onCreate(Bundle savedInstanceState) 
        {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_signup);


                editTextPassword=(EditText)findViewById(R.id.editTextPassword);
                editTextConfirmPassword=(EditText)findViewById(R.id.editTextConfirmPassword);    
                btnCreateAccount=(Button)findViewById(R.id.buttonCreateAccount);


                btnCreateAccount.setOnClickListener(new View.OnClickListener() {

                    public void onClick(View v) {
                        // TODO Auto-generated method stub

                        String password=editTextPassword.getText().toString();
                        String confirmPassword=editTextConfirmPassword.getText().toString();

                        // check if any of the fields are vaccant
                        if(password.equals("")||confirmPassword.equals(""))
                        {
                                Toast.makeText(getApplicationContext(), "Field Vaccant", Toast.LENGTH_LONG).show();
                                return;
                        }
                        // check if both password matches
                        if(!password.equals(confirmPassword))
                        {
                            Toast.makeText(getApplicationContext(), "Password Does Not Matches", Toast.LENGTH_LONG).show();
                            return;
                        }
                        else
                        {

                             pref = getApplicationContext().getSharedPreferences("MyPref",  MODE_PRIVATE); 
                            Editor editor= pref.edit();
                            editor.putString("Name", password);
                            editor.apply();

                                Toast.makeText(getApplicationContext(), "Account Successfully Created ", Toast.LENGTH_LONG).show();
                                Intent i= new Intent(SignupActivity.this, MainActivity.class);
                                startActivity(i);
                        }


                    }
                });
        }




        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.activity_main, menu);
            return true;
        }

}