how to get selected image from gallery in android?

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梦谈多话
梦谈多话 2020-12-18 15:58

I have a problem: I have a function that brings me the image from the gallery ;but when I select the image, I don\'t get it.

public void funzione(View v){
in         


        
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4条回答
  • 2020-12-18 16:14

    Declare Global Variables just after your class declaration at the top:

     private static int RESULT_LOAD_IMAGE = 1;
     private static final int PICK_FROM_GALLERY = 2;
     Bitmap thumbnail = null; 
    

    Call the intent like this: (Your funizone() function)

       public void funzione(){
           Intent in = new   Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                          startActivityForResult(in, RESULT_LOAD_IMAGE);
    
       }
    

    Handle the result like this: Declare this outside of your onCreate anywhere in the class.

     protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    
        super.onActivityResult(requestCode, resultCode, data);     
    
         if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data){
    
             Uri selectedImage = data.getData();
                String[] filePathColumn = { MediaStore.Images.Media.DATA };
                Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
                cursor.moveToFirst();
                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                String picturePath = cursor.getString(columnIndex);
                cursor.close();
                thumbnail = (BitmapFactory.decodeFile(picturePath));
    

    thumbnail is your picture, now play with it!

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  • 2020-12-18 16:17

    **Put This in Action Listener from where to choose image **

    Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    startActivityForResult(i, 100);
    

    This second Action Listener

    Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                        startActivityForResult(i, 200);
    

    After Return from a gallery, Result get Through request code **here code is 100 and 200 for both **

    @Override
        protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
    
            if (requestCode == 100 && resultCode == RESULT_OK && data != null){
                Uri imageUri=data.getData();
                try {
                    Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
                    reg_certificate.setImageBitmap(bitmap);
    
                } catch (IOException e) {
                    e.printStackTrace();
                }
    
            }
    
            if(requestCode == 200 && resultCode == RESULT_OK && data !=null){
                Uri imageUri=data.getData();
                try {
                    Bitmap bitmap= MediaStore.Images.Media.getBitmap(this.getContentResolver(),imageUri);
                    org_logo.setImageBitmap(bitmap);
    
                } catch (IOException e) {
                    e.printStackTrace();
                }
    
            }
        }
    
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  • 2020-12-18 16:25

    Use Following Code for add image in apps.

    public class MainActivity extends Activity {
    
    @Override
             public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);
                ImageView image = (ImageView) findViewById(R.id.test_image);
                image.setImageResource(R.drawable.test2);
            }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        /* Inflate the menu; this adds items to the action bar if it is present.*/
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
     }
    
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  • 2020-12-18 16:33
    package com.example.assignment;
    
    import android.app.Activity;
    import android.content.Intent;
    import android.database.Cursor;
    import android.graphics.BitmapFactory;
    import android.net.Uri;
    import android.os.Bundle;
    import android.provider.MediaStore;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.os.Bundle;
    import android.app.Activity;
    import android.view.Menu;
    
    public class MainActivity extends Activity {
    
    private static int RESULT_LOAD_IMAGE = 1;
    
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    
        Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
        buttonLoadImage.setOnClickListener(new View.OnClickListener() {
    
            @Override
            public void onClick(View arg0) {
    
                Intent i = new Intent(
                        Intent.ACTION_PICK,
                        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    
                startActivityForResult(i, RESULT_LOAD_IMAGE);
            }
        });
    }
    
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
    
        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
    
            Cursor cursor = getContentResolver().query(selectedImage,
                    filePathColumn, null, null, null);
            cursor.moveToFirst();
    
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();
    
            ImageView imageView = (ImageView) findViewById(R.id.imgView);
            imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
        }
        }
        }
    
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