保存选中按钮的状态时，返回键pressed或应用与共享preferences和onCheckChangeListener退出 [英] Saving the checked button state when back button pressed or app exited with SharedPreferences and onCheckChangeListener

问题描述

我试图做一个Android应用程序，允许用户阻止特定的时间段的应用程序。所以，我有安装的应用程序在一个开关按键片段的列表视图旁边。

我要当用户检查其或者preSS回来，退出该应用程序后，取消选中它，它留检查。

我想实现这一目标用setOnCheckedChangeListener和共享preferences;然而;我无法保存在我的BaseAdapter类按钮状态。

  holder.ck1.setOnCheckedChangeListener（新CompoundButton.OnCheckedChangeListener（）{        @覆盖
        公共无效onCheckedChanged（CompoundButton compoundButton，布尔B）{
            如果（holder.ck1.isChecked（））{
                // itemChecked [位置] =真;
                B =真实的;
                holder.ck1.setChecked（二）;
                Log.i（这是，检查+位置）;
                共享preferences.Editor编辑= context.getShared preferences（com.ibc.android.demo.appslist.app，Context.MODE_PRIVATE）.edit（）;
                editor.putBoolean（checkBox1，B）;
                editor.commit（）;            }其他{
                // itemChecked [位置] = FALSE;
                B = FALSE;
                holder.ck1.setChecked（二）;
                Log.i（这是，未选中：+位置）;
                共享preferences.Editor编辑= context.getShared preferences（com.ibc.android.demo.appslist.app，Context.MODE_PRIVATE）.edit（）;
                editor.putBoolean（checkBox1，B）;
                editor.commit（）;            }
        }    }）;
    共享preFS = context.getShared preferences（PACKAGE_NAME，Context.MODE_PRIVATE）;
    holder.ck1.setChecked（共享prefs.getBoolean（checkBox1，FALSE））;    //我想，也许不是假的我应该把我的方法定义的布尔B，而我不知道如何得到它。
    返回convertView;}
 

我怎么做我修改此为达到预期的效果？

解决方案

  holder.ck1.setOnCheckedChangeListener（新CompoundButton.OnCheckedChangeListener（）{    @覆盖
    公共无效onCheckedChanged（CompoundButton compoundButton，布尔B）
        {
                共享preferences.Editor编辑= context.getShared preferences（PACKAGE_NAME，Context.MODE_PRIVATE）.edit（）;
                editor.putBoolean（pakagename，B）;
                editor.commit（）;
        }}）;共享preFS = context.getShared preferences（PACKAGE_NAME，Context.MODE_PRIVATE）;
holder.ck1.setChecked（共享prefs.getBoolean（pakagename，FALSE））;
返回convertView;}
 

pakagename认为特定列表项的包名。否则，如果您在上面API级别11定位，您可以使用共享preferences一组来存储所有选中的包名。这是最简单的方式。否则，你可以保存在数据库中检查应用程序的列表。

I am trying to make an android app that allows users to block apps for a specific period of time. So I have a listview of installed apps in a fragment with a switch button next to it.

I want it to stay checked when the user checks its or unchecks it after they press back and exit the app.

I am trying to achieve this using setOnCheckedChangeListener and Shared Preferences; however; I am having trouble saving the button state in my BaseAdapter class.

    holder.ck1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (holder.ck1.isChecked()) {
                //itemChecked[position] = true;
                b = true;
                holder.ck1.setChecked(b);
                Log.i("This is", " checked: " + position);
                SharedPreferences.Editor editor = context.getSharedPreferences("com.ibc.android.demo.appslist.app", Context.MODE_PRIVATE).edit();
                editor.putBoolean("checkBox1", b);
                editor.commit();

            } else {
                //itemChecked[position] = false;
                b= false;
                holder.ck1.setChecked(b);
                Log.i("This is", " not checked: " + position);
                SharedPreferences.Editor editor = context.getSharedPreferences("com.ibc.android.demo.appslist.app", Context.MODE_PRIVATE).edit();
                editor.putBoolean("checkBox1", b);
                editor.commit();

            }
        }

    });
    sharedPrefs = context.getSharedPreferences("PACKAGE_NAME", Context.MODE_PRIVATE);
    holder.ck1.setChecked(sharedPrefs.getBoolean("checkBox1",false));

    // I think that maybe instead of false I should put the boolean b I defined in the method but I am not sure how to get it .


    return convertView;

}

How I do I modify this to reach to desired result?

解决方案

holder.ck1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(CompoundButton compoundButton, boolean b) 
        { 
                SharedPreferences.Editor editor = context.getSharedPreferences("PACKAGE_NAME", Context.MODE_PRIVATE).edit();
                editor.putBoolean(pakagename, b);
                editor.commit();
        }

});

sharedPrefs = context.getSharedPreferences("PACKAGE_NAME", Context.MODE_PRIVATE);
holder.ck1.setChecked(sharedPrefs.getBoolean(pakagename,false));
return convertView;

}

pakagename holds the package name of that particular listitem. Otherwise if you are targeting above api level 11, you can use a set in sharedpreferences to store all the checked package names. This is the easy way. Otherwise you can save the list of checked applications in a database.

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