How to debug "unfortunately app has stopped" in Android?

Question

I'm new to Android Programming. I'm following the guide on Android Tutorials in youtube. This for our thesis.

This is the MainActivity

package com.example.abrico.violatorsprofile;

import android.content.Intent;
import android.graphics.Bitmap;
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.ImageView;
import android.widget.Toast;

import com.kosalgeek.android.photoutil.CameraPhoto;
import com.kosalgeek.android.photoutil.ImageLoader;

import java.io.FileNotFoundException;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    private final String TAG = this.getClass().getName();


    ImageView ivCamera, ivImage;
    CameraPhoto cameraPhoto;

    final int CAMERA_REQUEST= 23345;
    DataBaseHelper myDb;


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

        myDb = new DataBaseHelper(this);

        //Move to TakePhoto activity
       Button btnPhoto = (Button) findViewById(R.id.btnPhoto);
        btnPhoto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
              Intent intent = new Intent(getApplicationContext(),com.example.abrico.violatorsprofile.takephoto.class);
                startActivity(intent);
            }
        });



        //   Opening the camera

        ivImage = (ImageView)findViewById(R.id.ivImage);
        ivCamera = (ImageView)findViewById(R.id.ivCamera);
        cameraPhoto = new CameraPhoto(getApplicationContext());

        ivCamera.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                try {
                    startActivityForResult(cameraPhoto.takePhotoIntent(), CAMERA_REQUEST);
                    cameraPhoto.addToGallery();
                } catch (IOException e) {
                    Toast.makeText(getApplicationContext(),
                            "Some wrong while taking photos", Toast.LENGTH_SHORT).show();
                }
            }
        });
        }

    @Override //* IMAGE VIEW
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(resultCode== RESULT_OK){
            if(requestCode==CAMERA_REQUEST){
                String photoPath = cameraPhoto.getPhotoPath();
                try {
                    Bitmap bitmap = ImageLoader.init().from(photoPath).requestSize(200,200).getBitmap();
                    ivImage.setImageBitmap(bitmap);

                }catch (FileNotFoundException e) {
                    Toast.makeText(getApplicationContext(),
                            "Some wrong while loading photos", Toast.LENGTH_SHORT).show();
                }
                Log.d(TAG, photoPath);
            }
        }










    }
    }

This is the Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.abrico.violatorsprofile">

    <uses-feature
        android:name="android.hardware.camera2"
        android:required="true" />

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".takephoto">

        </activity>


    </application>

</manifest>

Answer 1

You are getting OutOfMemory exception. This is a well-known issue when you load a large image from camera and load to screen. You should scale that image down before loading into ImageView

Here is the sample code getting from Loading Large Bitmaps Efficiently

public static int calculateInSampleSize(
            BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {

        final int halfHeight = height / 2;
        final int halfWidth = width / 2;

        // Calculate the largest inSampleSize value that is a power of 2 and keeps both
        // height and width larger than the requested height and width.
        while ((halfHeight / inSampleSize) >= reqHeight
                && (halfWidth / inSampleSize) >= reqWidth) {
            inSampleSize *= 2;
        }
    }

    return inSampleSize;
}

public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId,
        int reqWidth, int reqHeight) {

    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeResource(res, resId, options);

    // Calculate inSampleSize
    options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeResource(res, resId, options);
}

There is another trick is mentioned by another post that using android:largeHeap="true". This should be avoid as best practice when developing android application.

Answer 2

You can't increase the heap size dynamically but you can request to use more by using.

android:largeHeap="true"

in the manifest.xml,you can add in your manifest these lines it is working for some situations.

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:largeHeap="true"
android:supportsRtl="true"
android:theme="@style/AppTheme">

tell me if this not worked