本文介绍了尝试使用 SharedPreferences 更改颜色,但方法不正确的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试从菜单中更改某些文本和 MainActivity 的颜色.我有两个菜单,白色和黑色,如果我点击白色将返回背景白色,按钮黑色,文本黑色.当我单击黑色时,将返回背景灰色、按钮白色、文本、白色的颜色.我正在尝试使用 SharedPreferences 保存它,但它并不总是工作,它总是采用灰色.如果我在没有 SharedPreferences 的情况下执行此操作并单击 PopUpMenu 它会更改颜色,但是使用 SharedPreferences 它不起作用我写的错误.

I am trying to change colors of some text and MainActivity from a menu.I have two menus, white color and black color, if I click white will return the color of background white, buttons black, text black. When I click black will return the color of background grey, buttons white, text, white.I am trying this to save with SharedPreferences but it is not working always it takes the grey color.If I do this without SharedPreferences and click on the PopUpMenu it changes the color, but with SharedPreferences it is not working something I am writing false.

这是我在 MainActivity.class 中的代码.

This is my code in MainActivity.class.

private boolean switchOnOff;
public static final String Change_Color = "Change_Color";


switchOnOff = getChangeColor();
    if (switchOnOff) {
        setColorGreyImageButton();
    } else {
        setColorWhiteImageButton();

    }

public void setColorGreyImageButton() {
    settings.setColorFilter(Color.parseColor("#757575"));
    voiceSearch.setColorFilter(Color.parseColor("#757575"));
    share.setColorFilter(Color.parseColor("#757575"));
    search.setColorFilter(Color.parseColor("#757575"));
    mainView.setBackgroundColor(Color.parseColor("#FFFFFF"));

}


public void setColorWhiteImageButton() {
    settings.setColorFilter(Color.parseColor("#FFFFFF"));
    voiceSearch.setColorFilter(Color.parseColor("#FFFFFF"));
    share.setColorFilter(Color.parseColor("#FFFFFF"));
    search.setColorFilter(Color.parseColor("#FFFFFF"));
    mainView.setBackgroundColor(Color.parseColor("#ff212121"));
}

public void saveColor(boolean changeColor) {
    SharedPreferences sharedPreferences = getSharedPreferences("Color", MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putBoolean(getPackageName() + ".change_color", changeColor);
    editor.apply();

}


  private boolean getChangeColor() {
        SharedPreferences sharedPreferences = getSharedPreferences("Color", MODE_PRIVATE);
        return sharedPreferences.getBoolean(getPackageName() + ".change_color", false);
    }

这是MainActivity.class

mPopupMenu = new PopupMenu(this, settings);
        MenuInflater menuInflater = mPopupMenu.getMenuInflater();
        menuInflater.inflate(R.menu.main_settings, mPopupMenu.getMenu());
        settings.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mPopupMenu.show();
                mPopupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {

                        int id = item.getItemId();
                        if(id == R.id.menu_back_white) {
                            saveColor(true);
                        } else if (id == R.id.menu_back_black) {
                            saveColor(false);
                        }
       return false;
        }
      });
    }
  });

推荐答案

你需要改变这个:

if(id == R.id.menu_back_white) {
   saveColor(false); //I changed true to false
} else if (id == R.id.menu_back_black) {
   saveColor(true); //I changed false to true
}

因为当 "getChangeColor()" 为 false 时,您将其设置为白色:

because when "getChangeColor()" is false you set it to white color:

switchOnOff = getChangeColor();
    if (switchOnOff) {
        setColorGreyImageButton();
    } else {
        setColorWhiteImageButton();

    }

这篇关于尝试使用 SharedPreferences 更改颜色,但方法不正确的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-06 01:00
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