Question

我想使用SharedPreference保存电话号码。由于它是从电话簿中获取并在textView中设置的，因此我无法在SharedPreference中保存每一个。请帮助我了解如何通过SharedPreference保存和检索一组电话号码（数组或集合），并将其发送到另一个片段，以便对该号码进行消息传递。

Contact.java

package com.kamal.sos10;

import android.content.ContentResolver;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.nfc.Tag;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.content.Intent;
import android.widget.TextView;
import android.widget.Toast;

import java.lang.reflect.Array;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

public class Contact extends AppCompatActivity {

EditText msg,editText2,editText3,editText4;
Button con1,con2,con3;
TextView textView3,textView5,textView6,textView7,textView8,textView9;

TextView text1;
//  static final int PICK_CONTACT = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_contact);

    msg=(EditText)findViewById(R.id.msg);
   // editText2=(EditText)findViewById(R.id.editText2);

    textView3=(TextView)findViewById(R.id.textView3);
  //  text1=(TextView)findViewById(R.id.first);
    textView5=(TextView)findViewById(R.id.textView5);
    textView6=(TextView)findViewById(R.id.textView6);
    textView7=(TextView)findViewById(R.id.textView7);
    textView8=(TextView)findViewById(R.id.textView8);
    textView9=(TextView)findViewById(R.id.textView9);
    con1=(Button)findViewById(R.id.con1);
    con2=(Button)findViewById(R.id.con2);
    con3=(Button)findViewById(R.id.con3);

    con1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(Intent.ACTION_PICK);
            intent.putExtra("extra_text1", "1");
            intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
             if (intent.resolveActivity(Contact.this.getPackageManager()) != null) {
                startActivityForResult(intent, 1);
            }
        }
    });

    con2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(Intent.ACTION_PICK);
            intent.putExtra("extra_text2", "2");
            intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
            if (intent.resolveActivity(Contact.this.getPackageManager()) != null) {
                startActivityForResult(intent,2);
            }
        }
    });

    con3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(Intent.ACTION_PICK);
            intent.putExtra("extra_text3", "3");
            intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
            if (intent.resolveActivity(Contact.this.getPackageManager()) != null) {
                startActivityForResult(intent, 3);
            }
        }
    });
    int num = Integer.valueOf(textView3.getText().toString());
    int num2 = Integer.valueOf(textView6.getText().toString());
    int num3 = Integer.valueOf(textView7.getText().toString());
    Integer[] array=new Integer[3];
    array[0]=num;
    array[1]=num;
    array[2]=num;

    for (int j=0;j<3;j++)
    {

        Log.i("key", String.valueOf(array[j]));

    }
  /*
   SharedPreferences sharedPreferences=this.getSharedPreferences("com.kamal.sos10", Context.MODE_PRIVATE);

    SharedPreferences.Editor edit = sharedPreferences.edit();
    edit.putInt("array_size", strings.length);
    for(int i=0;i<strings.length; i++)
        edit.putString("array_" + i, strings[i]);
    edit.commit();

    int size = sharedPreferences.getInt("array_size", 0);
    strings = new String[size];
    for(int i=0; i<size; i++) {
       strings[i]= sharedPreferences.getString("array_" + i, null);
        Log.i("sdert",strings[i]);
    }
    */


}


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 1 || requestCode == 2 || requestCode == 3) {
        if (resultCode == this.RESULT_OK) {
            contactPicked(data,requestCode);
        }
    }
}

private void contactPicked(Intent data,int req) {
    ContentResolver cr = this.getContentResolver();
    Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
    cur.moveToFirst();
    try {
        // getData() method will have the Content Uri of the selected contact
        Uri uri = data.getData();
        //Query the content uri
        cur = this.getContentResolver().query(uri, null, null, null, null);
        cur.moveToFirst();
        // column index of the contact ID
        String id = cur.getString(cur.getColumnIndex(ContactsContract.Contacts._ID));
        // column index of the contact name
        String name = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
        // column index of the phone number
        Cursor pCur = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
                ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
                new String[]{id}, null);
        while (pCur.moveToNext()) {
            String phone = pCur.getString(
                    pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)).replaceAll(" ", "");
            String text1 = getIntent().getStringExtra("extra_text1");
            Toast.makeText(Contact.this, text1, Toast.LENGTH_SHORT).show();

            if (req==1)
            {
                textView3.setText(phone);
                Toast.makeText(Contact.this, textView3.getText(), Toast.LENGTH_SHORT).show();
                int num = Integer.valueOf(textView3.getText().toString());
                Log.i("yut", String.valueOf(num));
                textView5.setText(name);
            }
            if (req==2)
            {
                textView6.setText(phone);
                textView8.setText(name);
            }
            if (req==3)
            {
                textView7.setText(phone);
                textView9.setText(name);
            }



            pCur.close();
        }
    }
    catch (Exception e) {
        e.printStackTrace();
    }
}
}

Answer 1

您可以将ArrayList / Array / List保存到SharedPrefernces以下是如何做到的

    //Retrieve the values
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();

但您需要参考this链接了解详情和this链接。这些都很有用且易于理解。

第二部分将数据发送到片段

我建议将数据保存在当前的Activity / Fragment中，然后从你想要打开的片段中获取共享首选项中的数据，以防万一你真的想要获取数据并发送该片段的数据请考虑this链接。

注意：

通过查看您的代码，我认为可能会有大量的联系人，因此这意味着您将拥有一个大型数组。我建议您将它们存储在数据库中，因为您可以轻松检索/更新/删除任何数据和记录。

更新:(在评论中明确表示）

你已经编写了代码来从Onview中的Textview获取联系人，因为我认为textview中的联系人稍后会更新，而onCreate中的代码会在之前运行。

进行此更改

con3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //Just check it here int num = Integer.valueOf(textView3.getText().toString()); int num2 = Integer.valueOf(textView6.getText().toString()); int num3 = Integer.valueOf(textView7.getText().toString()); Integer[] array=new Integer[3]; array[0]=num; array[1]=num; array[2]=num; for (int j=0;j<3;j++) { Log.i("key", String.valueOf(array[j])); } } });

Answer 2

api level 11之后的

Set将存储在首选项中，因此将您的Array或List转换为设置并存储在首选项中

Set<String> setNameYouWantToStore = new HashSet<String>();
setNameYouWantToStore.addAll(listOfDetails);
scoreEditor.putStringSet("keyForSet", setNameYouWantToStore);
scoreEditor.commit();

使用Iterator进行Retriving

Set<String> setNameYouWantToStore = new HashSet<String>();
        Iterator iterator = setNameYouWantToStore.iterator();
        while(iterator.hasNext()) {
            System.out.println("Value: " + iterator.next() + " ");
        }

在共享首选项中保存电话号码数组

2 个答案: