java - 如何在共享首选项中保存 ListView 状态

Question

你好， friend 们，我是 Android 新手，在 arrayadopter 的帮助下使用自定义 ListView ，当用户单击 ListView 中的项目时，它会更改项目的颜色，现在我想将此状态保存在共享首选项中，请帮助我如何做到这一点，这是我的代码如果有专家在这里请帮助我，我感谢您的帮助，提前谢谢您

//这里我想在项目颜色改变时保存状态

    holder.linearLayout.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            Toasty.success(activity, "PICK COLOR", Toast.LENGTH_SHORT, true).show();

          highlight=true;




            Vibrator vibe = (Vibrator)activity.getSystemService(Context.VIBRATOR_SERVICE);
            vibe.vibrate(100);

            ColorPicker colorPicker = new ColorPicker(activity);
            ArrayList<String>colors=new ArrayList<>();
            colors.add("#e0e0eb");
            colors.add("#ccffff");
            colors.add("#ffe6ff");
            colors.add("#ffffcc");
            colors.add("#ccffcc");
            colors.add("#e6f2ff");
            colorPicker.setColors(colors).setColumns(4).setTitle("HIGHLIGHT VERSE").setRoundColorButton(true).setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
                @Override
                public void onChooseColor(int position, int color) {





//color is change and want save this in sharedperfence

 holder.linearLayout.setBackgroundColor(color);




                }

                @Override
                public void onCancel() {

                }
            }).show();






            return false;
        }
    });




my full adopter class

package bible.swordof.God;

import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
import android.opengl.Visibility;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.speech.tts.TextToSpeech;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;

import com.amulyakhare.textdrawable.TextDrawable;
import com.amulyakhare.textdrawable.util.ColorGenerator;


import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import es.dmoral.toasty.Toasty;
import petrov.kristiyan.colorpicker.ColorPicker;

import static android.content.Context.MODE_PRIVATE;
import static android.database.sqlite.SQLiteDatabase.CONFLICT_NONE;
import static android.icu.lang.UCharacter.GraphemeClusterBreak.V;
import static android.support.constraint.Constraints.TAG;
import static android.support.v4.content.ContextCompat.createDeviceProtectedStorageContext;
import static android.support.v4.content.ContextCompat.startActivity;

public class FullverseAdopter extends ArrayAdapter<String> {
    private ALLVERSE activity;

    private List<String> versenumber;
    private List<String>verseid;
    private List<String> verselist;
    private List<String> refernce;
    TextToSpeech textToSpeech;
    private DatabaseHelper mDBHelper;
    private SQLiteDatabase mDb;
    private boolean highlight;


public  String ex="switch";

    //check for availabe language
    int result;


    public FullverseAdopter(ALLVERSE context, int resource, List<String> versenumber, List<String> verselist, List<String> refernce, List<String>verseid) {
        super(context, resource, versenumber);
        this.activity = context;
        this.versenumber = versenumber;
        this.verselist = verselist;
        this.refernce = refernce;
        this.verseid=verseid;



    }


    @Override
    public int getCount() {
        return versenumber.size();
    }

    @Override
    public String getItem(int position) {
        return versenumber.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, final ViewGroup parent) {
        final ViewHolder holder;

        LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        // If holder not exist then locate all view from UI file.
        if (convertView == null) {
            // inflate UI from XML file
             convertView = inflater.inflate(R.layout.versedisplayrow, parent, false);
            // get all UI view
            holder = new ViewHolder(convertView);
            // set tag for holder
           holder.versenumber = (TextView) convertView.findViewById(R.id.versenumber);
            holder.verselist = (TextView) convertView.findViewById(R.id.verse);
           holder.addfavoruite=(ToggleButton)convertView.findViewById(R.id.adbookmark);


         holder.linearLayout=(LinearLayout)convertView.findViewById(R.id.layout);

            convertView.setTag(holder);
        } else {
            // if holder created, get tag from view
            holder = (ViewHolder) convertView.getTag();
        }
        holder.versenumber.setText(versenumber.get(position));

        holder.verselist.setText(verselist.get(position));

holder.linearLayout.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {



    }
});



holder.linearLayout.setOnLongClickListener(new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        Toasty.success(activity, "PICK COLOR", Toast.LENGTH_SHORT, true).show();

      highlight=true;




        Vibrator vibe = (Vibrator)activity.getSystemService(Context.VIBRATOR_SERVICE);
        vibe.vibrate(100);

        ColorPicker colorPicker = new ColorPicker(activity);
        ArrayList<String>colors=new ArrayList<>();
        colors.add("#e0e0eb");
        colors.add("#ccffff");
        colors.add("#ffe6ff");
        colors.add("#ffffcc");
        colors.add("#ccffcc");
        colors.add("#e6f2ff");
        colorPicker.setColors(colors).setColumns(4).setTitle("HIGHLIGHT VERSE").setRoundColorButton(true).setOnChooseColorListener(new ColorPicker.OnChooseColorListener() {
            @Override
            public void onChooseColor(int position, int color) {

                holder.linearLayout.setBackgroundColor(color);




            }

            @Override
            public void onCancel() {

            }
        }).show();






        return false;
    }
});
        /*holder.verselist.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                holder.verselist.setBackgroundColor(Color.parseColor("#e0e0eb"));
                return false;
            }
        });*/

//verselist highlight

/*holder.verselist.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {






    }
});*/



        //share verse
        holder.share.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toasty.info(activity, "Sharing a verse.", Toast.LENGTH_SHORT, true).show();
                Intent sendIntent = new Intent();
                sendIntent.setAction(Intent.ACTION_SEND);
                sendIntent.putExtra(Intent.EXTRA_TEXT, refernce.get(position) + ":" + versenumber.get(position) + '\n'   + verselist.get(position));
                sendIntent.setType("text/plain");
                activity.startActivity(sendIntent);

            }
        });

//add in favourite
      holder.addfavoruite.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

                if(isChecked){
                    mDBHelper = new DatabaseHelper(activity);
                    mDb = mDBHelper.getWritableDatabase();
                    ContentValues contentValues=new ContentValues();
                  contentValues.put("id",verseid.get(position));
                  contentValues.put("bookname",refernce.get(position));
                   contentValues.put("versenumber",versenumber.get(position));
                   contentValues.put("verse",verselist.get(position));
                   long check=mDb.insert("favourite",null,contentValues);
                   Log.d("MY_TAG","DB IS NOW "+check);
                   Toasty.success(activity, "Added in favouite", Toast.LENGTH_SHORT, true).show();


                }else {


                    mDBHelper = new DatabaseHelper(activity);
                    mDb = mDBHelper.getWritableDatabase();
                    long delete= mDb.delete("favourite","id=?",new String[]{verseid.get(position)});
                   Toasty.error(activity, "Remove in favouite", Toast.LENGTH_SHORT, true).show();
                }


            }
        });

       /* textToSpeech = new TextToSpeech(activity, new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int status) {

                if (status == TextToSpeech.SUCCESS) {
                    result = textToSpeech.setLanguage(Locale.ENGLISH);
                } else {

                    Toast.makeText(activity, "YOUR DEVICE NOT SUPPORTED", Toast.LENGTH_SHORT).show();
                }
            }
        });
*/



        //My toggle button








       /* holder.speakverse.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Toast.makeText(activity, "I AM CLICKED", Toast.LENGTH_SHORT).show();

                if (result == TextToSpeech.LANG_NOT_SUPPORTED || result == TextToSpeech.LANG_MISSING_DATA) {

                    Toast.makeText(activity, "Language not supported or Missing", Toast.LENGTH_SHORT).show();

                } else {


                    textToSpeech.speak(verselist.get(position), TextToSpeech.QUEUE_FLUSH, null);

                }
            }
        });*/




        return convertView;
    }

    static class ViewHolder {
        private TextView versenumber;
        private TextView verselist;

        private ImageView share;
        private  ToggleButton addfavoruite;
        private ImageView speakverse;
        private LinearLayout linearLayout;

        public ViewHolder(View v) {
            versenumber = (TextView) v.findViewById(R.id.versenumber);
            verselist = (TextView) v.findViewById(R.id.verse);
           share = (ImageView) v.findViewById(R.id.share);
            /*speakverse = (ImageView) v.findViewById(R.id.speakverse);*/
        addfavoruite=(ToggleButton)v.findViewById(R.id.adbookmark);
        linearLayout=(LinearLayout)v.findViewById(R.id.layout);



        }


    }
    public boolean CheckIsDataAlreadyInDBorNot(String TableName,  String dbfield, String fieldValue) {

        mDBHelper = new DatabaseHelper(activity);
        mDb = mDBHelper.getReadableDatabase();
        String Query = "Select * from " + TableName + " where " + dbfield + " = " + fieldValue;
        Cursor cursor = mDb.rawQuery(Query, null);
        if(cursor.getCount() <= 0){
            cursor.close();

            Toast.makeText(activity, "false", Toast.LENGTH_SHORT).show();
            return false;
        }else {

            Toast.makeText(activity, "TRUE", Toast.LENGTH_SHORT).show();

        }
        cursor.close();


        return true;
    }
    public  void opecolorpicker(){



    }

}

Answer 1

实现它的一种方法是创建一个像这样的新类

class MySaveInstanceClass {
  static ArrayList<Boolean> selectStatusArray;
}

获取数据时初始化此数组

MySaveInstanceClass.selectStatusArray = new ArrayList<>(yourList.size());

此时数组中的每个值都将为 false。每个列表项都有一个标志。

当您设置布局的颜色时，只需访问该数组并检查相应的位置。

holder.linearLayout.setOnLongClickListener(new View.OnLongClickListener() {
  @Override
  public boolean onLongClick(View v) {
    if (MySaveInstanceClass.selectStatusArray.get(posiiton) == true) {
      // set background color
    }
  }
}

现在您想要保存状态。您也可以在 Activity 中访问该数组。

有一个生命周期方法onDestroy()，您可以在其中打开共享首选项并保存它。它看起来像这样

Set<String> set = myScores.getStringSet("key", null);
//Set the values
Set<String> set = new HashSet<String>();
set.addAll(listOfExistingScores);
scoreEditor.putStringSet("key", set);
scoreEditor.commit();

现在您的状态已保存。在 onStart() 或 onCreate() 方法中访问相同的共享首选项并获取数组并初始化类

MySaveInstanceClass.selectStatusArray = <array found from shared preference>;