通过保存按钮中输入文字EDITTEXT [英] Save entered text in editText via button

问题描述

我要保存在的EditText 使用共享preferences entenred一个字符串的价值。
并显示文本活动开始时

 公共类enteredText扩展活动
{  私人按钮savenotebutton1;
  私人共享preferences savednotes;
  私人的EditText editText1;  保护无效的onCreate（捆绑savedInstanceState）
  {
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.x1）;    savenotebutton1 =（按钮）findViewById（R.id.savenotebutton1）;
    editText1 =（EditText上）findViewById（R.id.noteEditText1）;
    savednotes = getShared preferences（票据，MODE_PRIVATE）;    savenotebutton1.setOnClickListener（saveButtonListener）;
  }  私人无效makeTag（字符串标签）
  {
       字符串或= savednotes.getString（标签，NULL）;
        共享preferences.Editor preferencesEditor = savednotes.edit（）;
        preferencesEditor.putString（标签，NULL）;
        preferencesEditor.commit（）;
  }
    公共OnClickListener saveButtonListener =新OnClickListener（）{        @覆盖
        公共无效的onClick（视图v）{
            如果（editText1.getText（）长度（）大于0）{
            makeTag（editText1.getText（）的toString（））;                （（InputMethodManager） getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(editText1.getWindowToken(),0);            }
        }    };}
 

解决方案

您有两条新线与下面的评论更改code：

 公共类enteredText延伸活动{    私人按钮savenotebutton1;
    私人共享preferences savednotes;
    私人的EditText editText1;    保护无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.x1）;        savenotebutton1 =（按钮）findViewById（R.id.savenotebutton1）;
        editText1 =（EditText上）findViewById（R.id.noteEditText1）;
        savednotes = getShared preferences（票据，MODE_PRIVATE）;        editText1.setText（savednotes.getString（标签，默认值））; //添加此行        savenotebutton1.setOnClickListener（saveButtonListener）;
    }    私人无效makeTag（字符串标签）{
       字符串或= savednotes.getString（标签，NULL）;
        共享preferences.Editor preferencesEditor = savednotes.edit（）;
        preferencesEditor.putString（标签，标签）; //改变这一行本
        preferencesEditor.commit（）;
    }    公共OnClickListener saveButtonListener =新OnClickListener（）{        @覆盖
        公共无效的onClick（视图v）{
            如果（editText1.getText（）长度（）大于0）{
            makeTag（editText1.getText（）的toString（））;            （（InputMethodManager） getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(editText1.getWindowToken(),0);            }
        }
    };
}
 

i want to save a String's value that is entenred in EditText using sharedPreferences. and show text when activity starts

public class enteredText extends Activity
{

  private Button savenotebutton1;
  private SharedPreferences savednotes;
  private EditText editText1;

  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.x1);

    savenotebutton1 = (Button) findViewById(R.id.savenotebutton1);
    editText1 = (EditText) findViewById(R.id.noteEditText1);
    savednotes = getSharedPreferences("notes",MODE_PRIVATE);

    savenotebutton1.setOnClickListener(saveButtonListener);
  }

  private void makeTag(String tag)
  {
       String or = savednotes.getString(tag, null);
        SharedPreferences.Editor preferencesEditor = savednotes.edit();
        preferencesEditor.putString(tag,null);
        preferencesEditor.commit();
  }


    public OnClickListener saveButtonListener = new OnClickListener(){

        @Override
        public void onClick(View v) {
            if(editText1.getText().length()>0){
            makeTag(editText1.getText().toString());    

                ((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(editText1.getWindowToken(),0);

            }


        }

    };

}

解决方案

You have to change your code with two new lines with comments below:

public class enteredText extends Activity{

    private Button savenotebutton1;
    private SharedPreferences savednotes;
    private EditText editText1;

    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.x1);

        savenotebutton1 = (Button) findViewById(R.id.savenotebutton1);
        editText1 = (EditText) findViewById(R.id.noteEditText1);
        savednotes = getSharedPreferences("notes",MODE_PRIVATE);

        editText1.setText(savednotes.getString("tag", "Default Value")); //add this line

        savenotebutton1.setOnClickListener(saveButtonListener);
    }

    private void makeTag(String tag){
       String or = savednotes.getString(tag, null);
        SharedPreferences.Editor preferencesEditor = savednotes.edit();
        preferencesEditor.putString("tag",tag); //change this line to this
        preferencesEditor.commit();
    }

    public OnClickListener saveButtonListener = new OnClickListener(){

        @Override
        public void onClick(View v) {
            if(editText1.getText().length()>0){
            makeTag(editText1.getText().toString());    

            ((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(editText1.getWindowToken(),0);

            }
        }
    };
}

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