共享首选项不保存？

Question

当我尝试将变量保存到共享首选项然后在编辑文本中调用它时它没有被保存？我已经四处寻找了几个小时，但我找不到任何东西。我知道 sharedPrefrences 在某种程度上就像一本字典，但除此之外我不明白为什么它不起作用:(

package com.example.gatorblocks;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.wearable.activity.WearableActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class block1Settings extends WearableActivity{

    private TextView mTextView;

    Context context = this;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_block1_settings);
        configureBackButton();
        configureColor();

        Button addTextButton = (Button) findViewById(R.id.Apply);
        TextView simpleEditText =  findViewById(R.id.simpleEditText);
        SharedPreferences prefs = getSharedPreferences("classes.txt", 0);
        simpleEditText.setText(prefs.getString("classes1","1-1"));                 //set textbox to equal current class

        final EditText vEditText = (EditText) findViewById(R.id.simpleEditText);


        mTextView = (TextView) findViewById(R.id.text);

        // Enables Always-on
        setAmbientEnabled();

        addTextButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String enteredText = vEditText.getText().toString();        //sets the array value of block to the editText
                test(enteredText);

            }
        });
    }
    private void configureColor() {
        Button Block1 = (Button) findViewById(R.id.colorButton);
        Block1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                startActivity(new Intent(block1Settings.this, colorBlock1.class));
                overridePendingTransition(R.anim.slide_in_right,R.anim.slide_out_left);
            }
        });
    }

    private void configureBackButton(){
        Button backbutton = (Button) findViewById(R.id.backButton);
        backbutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                startActivity(new Intent(block1Settings.this, classes.class));
                overridePendingTransition(R.anim.slide_in_left,R.anim.slide_out_right);
                finish();

            }
        });
    }
    public void test(String enteredText){
        SharedPreferences pref = getSharedPreferences("classes.txt", 0);
        SharedPreferences.Editor editor = pref.edit();
        editor.putString("class1", enteredText);
        editor.apply();
    }

}

Answer 1

您是如何从 SharedPreferences 获取未保存的数据的？您使用密钥 class1 保存了数据，并希望通过 classes1 获取它，这是不正确的方法。您必须使用相同的密钥。尝试使用

SharedPreferences prefs = getSharedPreferences("classes.txt", 0);
simpleEditText.setText(prefs.getString("class1","1-1"));

共享首选项不保存？

Sharedprefrences not saving?

android

sharedpreferences

android-edittext