Question

This is my MainActivity.java
I used // to mark as not using on some lines and found that the line start with int t =
Is the problem that make the application to crash and force closing.

package com.example.camera_test;

import android.os.Build;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.hardware.Camera;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends Activity {

    private static final int CAMERA_PIC_REQUEST = 1337; 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button = (Button) findViewById(R.id.button1);

        button.setOnClickListener(new OnClickListener()
        {
        @SuppressLint("NewApi") @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );

            startActivityForResult( intent, CAMERA_PIC_REQUEST );
        }
        });


    }

    @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;
    }
    @SuppressLint("NewApi") protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
        if (requestCode == CAMERA_PIC_REQUEST) {  
        // do something
            Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
            int t = thumbnail.getByteCount();
            TextView age = (TextView) findViewById(R.id.textView1);
            age.setText(Integer.toString(t));
            ImageView image = (ImageView) findViewById(R.id.imageView1);
            image.setImageBitmap(thumbnail);
        }  
       }  
}

I added a button when I click on it it will open the camera on my device after I take a photo it will show the photo I took on a small window. It’s working.

Then I added this 3 lines:

int t = thumbnail.getByteCount();
TextView age = (TextView) findViewById(R.id.textView1);
age.setText(Integer.toString(t));

I wanted to show also the ByteCount of the image on screen in my device.

Once I add the line: int t = thumbnail.getByteCount(); there was an error so I did automatic fix and it added @SuppressLint(“NewApi”)

Then I marked with // this 3 lines once I unmarked and used the line int t = thumbnail.getByteCount(); so after I took a photo it crashed and told me it need to force close.

Why does it crash on this line ?

This is the file activity_main.xml

<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"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="45dp"
        android:layout_marginTop="62dp"
        android:text="Activate The Camera" />
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />
</RelativeLayout>

1. I can’t figure out why it crash with the int t line.

2. I added a breakpoint on the int t line but it never stop there and never stop anywhere on my application when I add a breakpoint why ?

Answer 1

The getByteCount() is available from API level 12 (android 3.1+).
Are you sure you are building/running this version or above?

Also please add LogCat in the feature, much easier to find the error.