Question

我有多个按钮，我想更改按钮的颜色。我知道，但是如何在共享首选项中保存这些颜色？以及如何从共享首选项中删除它们？

private void ShowPunch() {
                final Dialog dialog = new Dialog(context);
                dialog.setContentView(R.layout.fragment_edit_profile);

                WS = (Button)dialog.findViewById(R.id.ws);
                WE = (Button)dialog.findViewById(R.id.we);
                LS = (Button)dialog.findViewById(R.id.lts);
                LE = (Button)dialog.findViewById(R.id.lte);
                PS = (Button)dialog.findViewById(R.id.pts);
                PE = (Button)dialog.findViewById(R.id.pte);
                MRMS = (Button)dialog.findViewById(R.id.mrms);
                MRME = (Button)dialog.findViewById(R.id.mrme);

                WS.setOnClickListener(this) ;
                WE.setOnClickListener(this) ;
                LS.setOnClickListener(this) ;
                LE.setOnClickListener(this) ;
                PS.setOnClickListener(this) ;
                PE.setOnClickListener(this) ;
                MRMS.setOnClickListener(this) ;
                MRME.setOnClickListener(this) ;
                dialog.show();
            }

            @SuppressLint("ResourceAsColor")
            @Override
            public void onClick(View v) {


                switch (v.getId()) {
                    case R.id.ws:
                        Punching();
                        WS.setBackgroundColor(R.color.feedpos);
                        Toast.makeText(context, "Your Work Time Start From Now..", Toast.LENGTH_SHORT).show();

                        break;
                    case R.id.we:
                        Punchingwe();
                        Toast.makeText(context, "Your Work Time End Here..", Toast.LENGTH_SHORT).show();
                        WE.setBackgroundColor(myIntValue);

                        break;
                    case R.id.pts:
                        Punchingpts();
                        Toast.makeText(context, "Your Prayer Time Start From Now..", Toast.LENGTH_SHORT).show();
                        PS.setBackgroundColor(myIntValue);
                        break;
                    case R.id.pte:
                        Punchingpte();
                        Toast.makeText(context, "Your Prayer Time End Here..", Toast.LENGTH_SHORT).show();
                        PE.setBackgroundColor(myIntValue);
                        break;
                    case R.id.lts:
                        Punchinglts();
                        Toast.makeText(context, "Your Lunch Time Start From Now..", Toast.LENGTH_SHORT).show();
                         LS.setBackgroundColor(myIntValue);

                        break;
                    case R.id.lte:
                        Punchinglte();
                        Toast.makeText(context, "Your Lunch Time End Here..", Toast.LENGTH_SHORT).show();
                           LE.setBackgroundColor(myIntValue);

                        break;
                    case R.id.mrms:
                        Punchingmrms();
                        Toast.makeText(context, "Your MRM Time Start From Now..", Toast.LENGTH_SHORT).show();
                        MRMS.setBackgroundColor(myIntValue);
                       break;
                    case R.id.mrme:
                        Punchingmrme();
                        Toast.makeText(context, "Your MRM Time End Here..", Toast.LENGTH_SHORT).show();
                         MRME.setBackgroundColor(myIntValue);

                        break;
                    default:
                        break;
                }
            }

Answer 1

请参阅this video。

在做键值对时，我将存储整数，然后将它们转换回颜色。例如，如果我用密钥"1"存储"button1-color"，则在使用getString("button_color")时将其转换为颜色，请说

1 -> red
2 -> orange
3 -> yellow
4 -> green
5 -> blue

Answer 2

创建一个SharedPreference实例

mSharedPreferences = getSharedPreferences("shared_pref_name", MODE_PRIVATE);

在您的Activity


    private void saveViewColor(int viewId, int color) {
        mSharedPreferences.edit().putInt(String.valueOf(viewId), color).apply();
    }

    private int getViewColor(int viewId) {
        return mSharedPreferences.getInt(String.valueOf(viewId), Color.parseColor("#FFFFFF"));
    }

    private void removeViewColor(int viewId) {
        mSharedPreferences.edit().remove(String.valueOf(viewId)).apply();
    }

    private void clearAll() {
        mSharedPreferences.edit().clear();
    }

点击视图时调用方法

view.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {


        int colorInt = Color.BLUE;

        Drawable drawable = v.getBackground();

        //get color from the view which being clicked
        if (drawable instanceof ColorDrawable) {
            colorInt = ((ColorDrawable) drawable).getColor();
        }

        int viewId = v.getId();

        v.setBackgroundColor(colorInt);

        //save color
        saveViewColor(viewId, colorInt);

        //get current view color
        getViewColor(viewId);

        //remove color for current view
        removeViewColor(viewId);

        //clear all SharedPreferences not only the color
        clearAll();
    }
});

Answer 3

我这样做的方式是创建一个新的Preferences类来存储所有颜色，然后为每种颜色创建吸气剂和吸气剂。

public class Preferences extends Activity {

public static final String PREF_FILE = "MyPrefsFileKey";

public int setColour1() {
        SharedPreferences prefs = getContext().getSharedPreferences(PREF_FILE, MODE_PRIVATE);

        colour = prefs.getInt("colour1Key", 0); //0 being the default value.

      return colour1;
    }

    public int getColour1(int colour1) {

        SharedPreferences pref = getContext().getSharedPreferences(PREF_FILE, MODE_PRIVATE);
        SharedPreferences.Editor editor = pref.edit();

        editor.putInt("colour1Key", colour1);
        editor.apply();
        return colour1;
    }
}

现在要保存颜色，只需在每种情况下添加颜色即可。但是，您将需要为每个创建更多的getter和setter。

preferences.getColour1(getContext(), myIntValue1);

记住要在您要从中保存的类中添加一个Preferences类的新实例

Preferences preferences = new Preferences();

如果您有任何麻烦，请告诉我。

-编辑显然，我只有50信誉才能编辑。在您的代码中，您有.setBackgroundColor（myIntValue） myIntValue1是您要保存的第一种颜色的值。

如何在按钮单击时将按钮的颜色保存为共享的首选项？

3 个答案: