Retrieve the last saved photo and insert into an imageView every time the activity is started

Question

Retrieve the last saved photo and insert into an imageView every time the activity is started

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#1 by (4 votes)

5

I'm doing a job and I created a page that simulates a profile, so when a user is logged in, he can enter that page and take a picture to be saved there. So as soon as the photo is taken the imageView receives it, after the user leaves the profile page I lose the reference of it. How can I make it just quit imageView when the user takes another photo? Here is the code:

import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class VerPerfilActivity extends Activity {
Button btFoto, btOk, btVerifica;
TextView nomeTV;
String nomeFoto;
int numFoto = 0;
boolean foto = false;
ImageView ivPreview;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_ver_perfil);

    btFoto = (Button) findViewById(R.id.btFoto);
    btFoto.setOnClickListener(btFotoListener);
    btOk = (Button) findViewById(R.id.btOk);
    btOk.setOnClickListener(btOkListener);
    ivPreview = (ImageView) findViewById(R.id.imageView1);


}

private void verifica() {
    PackageManager packageManager = VerPerfilActivity.this.getPackageManager();

    if(packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
        foto = true;
    }else {
        foto = false;
    }
}


private OnClickListener btFotoListener = new OnClickListener() {

    @Override
    public void onClick(View v) {
            verifica();
            if (foto == true) {
                Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                i.putExtra(MediaStore.EXTRA_OUTPUT, getCaminhoArquivo());

                if(i.resolveActivity(VerPerfilActivity.this.getPackageManager()) != null) {
                    startActivityForResult(i, 34);
            }else {
                Toast.makeText(VerPerfilActivity.this, "Não há nenhuma camera!", Toast.LENGTH_SHORT).show();    
            }   
        }
    }
};

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 34) {
        if (resultCode == RESULT_OK) {
            Uri takenPhotoUri = Uri.fromFile(new File(nomeFoto));
            Bitmap takenImage = BitmapFactory.decodeFile(takenPhotoUri.getPath());
            ivPreview.setImageBitmap(takenImage);
        }else {
            Toast.makeText(this, "A foto não foi tirada!", Toast.LENGTH_SHORT).show();  
        }
    }
}

protected Uri getCaminhoArquivo() {
    File diretorioMidia = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "aps");
    if (!diretorioMidia.exists() && !diretorioMidia.mkdirs())
        Log.d("aps", "error creating the file");

        numFoto++;
        String fileName = "foto" + numFoto + ".jpg";
        nomeFoto = diretorioMidia.getPath() + File.separator + fileName;
    return Uri.fromFile(new File(nomeFoto));
}

private OnClickListener btOkListener = new OnClickListener() {

    @Override
    public void onClick(View v) {
        VerPerfilActivity.this.finish();
    }
};

I tried to insert this code into OnCreate, but it did not work either:

    File imgFile = new File(Environment.getExternalStorageDirectory().getPath());

    if(imgFile.exists()){

        Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());

        ivPreview.setImageBitmap(myBitmap);

    }

java android

asked by anonymous 21.06.2015 / 20:42

1 answer

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score 4 · Accepted Answer

One of the possible ways is to save the photo path using SharedPreferences .

Type two methods, one to save and one to read the path.

private void savePhotoPath(String photoPath){
    SharedPreferences preferences =  PreferenceManager.getDefaultSharedPreferences(this);
    preferences.edit.putString("photoPath",photoPath).apply();
}

private String getPhotoPath(){
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
    return preferences.getString("photoPath","");
}

In the onActivityResult() method, after assigning the photo to mageView , save your path:

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 34) {
        if (resultCode == RESULT_OK) {
            Bitmap takenImage = BitmapFactory.decodeFile(nomeFoto);
            ivPreview.setImageBitmap(takenImage);
            savePhotoPath(nomeFoto);
        }else {
            Toast.makeText(this, "A foto não foi tirada!", Toast.LENGTH_SHORT).show();  
        }
    }
}

In the% cos_de% method, get the path of the photo, and if it is not empty, retrieve the photo and assign it to ImageView :

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_ver_perfil);

    btFoto = (Button) findViewById(R.id.btFoto);
    btFoto.setOnClickListener(btFotoListener);
    btOk = (Button) findViewById(R.id.btOk);
    btOk.setOnClickListener(btOkListener);
    ivPreview = (ImageView) findViewById(R.id.imageView1);

    String photoPath = getPhotoPath();
    if(photoPath != ""){
        Bitmap takenImage = BitmapFactory.decodeFile(photoPath);
        ivPreview.setImageBitmap(takenImage);
    }
}