以下のコードを使用してsqliteに画像を保存すると、最初の画像しか表示されません。アプリケーションはid

Question

で画像を保存し、SQLiteから復元するときに復元しません。 1つのイメージ（最初のイメージ）のみを挿入し、idでイメージを復元すると、最初のイメージのみが復元されます。

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> 

    <EditText 
    android:layout_width="match_parent" 
    android:layout_height="50dp" 
    android:textSize="24dp" 
    android:hint="enter name" 
    android:id="@+id/nametxt" 
    android:layout_marginTop="350dp" 
    /> 
    <EditText 
     android:layout_width="match_parent" 
     android:layout_height="50dp" 
     android:textSize="24dp" 
     android:hint="enter id" 
     android:id="@+id/idtxt" 
     android:layout_marginTop="420dp" 
     /> 
    <Button 
     android:textSize="20dp" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Save Image Sqlite" 
     android:id="@+id/button" 
     android:layout_below="@+id/imageView" 
     android:layout_marginTop="75dp" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:layout_alignParentRight="true" 
     android:layout_alignParentEnd="true" /> 

    <Button 
     android:textSize="20dp" 

     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:text="Get Image From Sqlite" 
     android:id="@+id/button2" 
     android:layout_below="@+id/button" 
     android:layout_marginTop="42dp" 
     android:layout_alignParentRight="true" 
     android:layout_alignParentEnd="true" /> 

    <ImageView 
     android:background="@color/colorPrimaryDark" 
     android:layout_width="120dp" 
     android:layout_height="120dp" 
     android:id="@+id/imageView2" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" /> 

    <ImageView 
     android:background="@color/colorAccent" 
     android:layout_width="120dp" 
     android:layout_height="120dp" 
     android:id="@+id/imageView" 
     android:scaleType="fitCenter" 
     android:maxHeight="120dp" 
     android:maxWidth="120dp" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentRight="true" 
     android:layout_alignParentEnd="true" /> 
</RelativeLayout> 

MainActivity.java

package com.example.mahmoudbelal.navigator; 

import android.content.Intent; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ImageView; 
import android.widget.Toast; 

import java.io.ByteArrayOutputStream; 

public class MainActivity extends AppCompatActivity { 
    private static int RESULT_LOAD_IMG = 1; 
    String imgDecodableString; 
static EditText name,id; 

    static ImageView Img,Img2; 
    Button Save,Get; 
    SQLiteDatabase db; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
id= (EditText) findViewById(R.id.idtxt); 
     Img = (ImageView) findViewById(R.id.imageView); 
     Img2 = (ImageView) findViewById(R.id.imageView2); 
     Save = (Button) findViewById(R.id.button); 
     Get = (Button) findViewById(R.id.button2); 
     name= (EditText) findViewById(R.id.nametxt); 

     Img.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Intent galleryIntent = new Intent(Intent.ACTION_PICK, 
         android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
       // Start the Intent 
       startActivityForResult(galleryIntent, RESULT_LOAD_IMG); 
      } 
     }); 

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

       try {  

        Img.buildDrawingCache(); 
        Bitmap bitmap=Img.getDrawingCache(); 

        ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, bos); 
        byte[] img = bos.toByteArray(); 

        DBAdapter D=new DBAdapter(); 
        D.open(MainActivity.this); 
        String myname=name.getText().toString(); 
        String myid=id.getText().toString(); 

        D.insert_user_data(myid,myname,img); 

        Toast.makeText(MainActivity.this, "Inserted Data well !", Toast.LENGTH_SHORT).show(); 

        name.setText(" "); 
        id.setText(" "); 

       }catch (Exception e){ 
        Toast.makeText(MainActivity.this, ""+e.getMessage(), Toast.LENGTH_SHORT).show();  
       } 
      } 
     });  
//------------------------------------------------------------------------------------//\ 

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

       DBAdapter D=new DBAdapter(); 
       D.open(MainActivity.this); 
       String use_id=id.getText().toString(); 
       D.Get_user_data(use_id); 
       if (DBAdapter.ok.equals("1")){ 
        // Img2.setImageBitmap(DBAdapter.bmp); 
        // Toast.makeText(MainActivity.this, "name is = "+DBAdapter.s, Toast.LENGTH_SHORT).show(); 
        name.setText(""+DBAdapter.s); 

       }else 
       { 

        Toast.makeText(MainActivity.this, "Error y m3lm ", Toast.LENGTH_SHORT).show(); 
       }   } 
     }); 
    }  

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 

     // When an Image is picked 
     if (requestCode == RESULT_LOAD_IMG && resultCode == this.RESULT_OK 
       && null != data) { 
      // Get the Image from data 

      Uri selectedImage = data.getData(); 
      String[] filePathColumn = {MediaStore.Images.Media.DATA}; 

      // Get the cursor 
      Cursor cursor = getContentResolver().query(selectedImage, 
        filePathColumn, null, null, null); 

      cursor.moveToFirst(); 

      int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
      imgDecodableString = cursor.getString(columnIndex);  
//-0------------------------------------------------------------------------------------------------------------- 
      Uri photoUri = data.getData(); 
      String[] proj = {MediaStore.Images.Media.DATA}; 

      Cursor actualimagecursor = managedQuery(photoUri, proj, null, null, null); 
      int actual_image_column_index = actualimagecursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
      actualimagecursor.moveToFirst();  
      //-------------------------------------------------------------------------------------------- 
      cursor.close();  
      Img.setImageBitmap(BitmapFactory.decodeFile(imgDecodableString)); 

      Toast.makeText(MainActivity.this, "Image Uploaded", Toast.LENGTH_LONG).show();  

     } else { 
      Toast.makeText(MainActivity.this, "You haven't picked Image", Toast.LENGTH_LONG).show(); 
     }}  
    } 

DBAdapter.java

package com.example.mahmoudbelal.navigator; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 

public class DBAdapter { 
    // first step:create table 
    static Bitmap bmp; 
    static String s=""; 
    private int version=1; 
    private String DatabaseName="DNAA"; 
    private String TableName="user"; 
    static String ok; 
//        --------------------------------------------------        //  
    private String create_table = "CREATE TABLE IF NOT EXISTS user(id varchar,name varchar,img blob);"; 

    // second step:helper class 
    class DbHellper extends SQLiteOpenHelper{  

     public DbHellper(Context context){ 
      super(context , DatabaseName , null , version); 
     } 

     @Override 
     public void onCreate(SQLiteDatabase db) { 
      db.execSQL(create_table); 
     } 

     @Override 
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {  
      db.execSQL("Drop table If Exists "+TableName); 
      onCreate(db);  
     } 
    }  

    private DbHellper DB_helper; 
    private SQLiteDatabase db; 

    public DBAdapter open(Context conn){ 
     DB_helper = new DbHellper(conn); 
     db = DB_helper.getWritableDatabase(); 
     return this; 

     // activity 
    } 

    private void close(){ 
     db.close(); 
    } 
    int i = 0; 

    public void insert_user_data (String id, String name, byte[] ii){ 
     ContentValues cv = new ContentValues();  

     cv.put("id" , id); 
     cv.put("name" , name); 
     cv.put("img" , ii); 

     db.insert(TableName, null, cv);  
    } 

    public void updateSection(String username , String password , int rowId){ 
     ContentValues cv = new ContentValues(); 
     cv.put("username" , username); 
     cv.put("password" , password); 
     db.update(TableName, cv, "_id =" + rowId, null); 
    } 

    // Login method 
    public void Get_user_data (String id){ 

    Cursor c = db.rawQuery("SELECT name,img FROM user where id='"+id+"'", null); 
     if (c.moveToFirst()) { 
      s= c.getString(0); 
      byte[] i=c.getBlob(1); 

      bmp= BitmapFactory.decodeByteArray(i,0,i.length); 
      MainActivity.Img2.setImageBitmap(bmp); 

      ok="1"; 
     } else { 
      ok="0"; 
     } 
    } 
    // delete data 
    public void deleteSection(int rowId){ 
     db.delete(TableName, "_id =" + rowId, null); 
    } 

    public Cursor getAllSections(){ 
     return db.query(TableName,new String []{"username","password"},null,null,null,null,null); 
    } 

    public Cursor getSection (String whereClause){ 
     return db.query(TableName,new String []{"_id","name","devices"},whereClause,null,null,null,null); 
    } 
} 

Answer 1

これはあなた

String []型の列=役立つかもしれません10 {MediaStore.Images.Media.DATA、MediaStore.Images.Media._ID};あなたの参照のチェックのための

final String orderBy = MediaStore.Images.Media.DATE_TAKEN; 

    Cursor imagecursor = managedQuery(
      MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns,null,null, orderBy + " DESC"); 

    this.imageUrls = new ArrayList<String>(); 

    for (int i = 0; i < imagecursor.getCount(); i++) { 
     imagecursor.moveToPosition(i); 
     int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA); 
     imageUrls.add(imagecursor.getString(dataColumnIndex)); 

     System.out.println("==here you will get all the images path ;=> "+imageUrls.get(i)); 
    } 

この： http://www.technotalkative.com/android-select-multiple-photos-from-gallery/