Display Image In Android Studio On Device Connected Externally - android-studio

Question

I am new to Android Learning. I am trying to make a customAdapter that will display an image and a text in every row. In my Main_Activity, I have following code:`
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String [] foods= {"Biryani","Matar Qeema","Chicken"};
ListAdapter faizisAdapter= new CustomAdapter(this,foods);
ListView faizisListView= (ListView)findViewById(R.id.faizisListView);
faizisListView.setAdapter(faizisAdapter);
faizisListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String food= String.valueOf(parent.getItemAtPosition(position));
Toast.makeText(MainActivity.this,food,Toast.LENGTH_LONG).show();
}
});
}
}
Here is my CustomAdapter:
class CustomAdapter extends ArrayAdapter<String>{
CustomAdapter(Context context, String []foods)
{
super(context,R.layout.custom_row, foods);
}
public View getView(int position, #Nullable View convertView, #NonNull
ViewGroup parent) {
LayoutInflater faisizInflater = LayoutInflater.from(getContext());
View faizisView = faisizInflater.inflate(R.layout.custom_row, parent,
false);
String food = getItem(position);
TextView _foodsDisplay = (TextView)
faizisView.findViewById(R.id._foodDisplay);
ImageView _imageDisplay = (ImageView)
faizisView.findViewById(R.id._imageDisplay);
_imageDisplay.setImageResource(R.drawable.zaheer8423);
_foodsDisplay.setText(food);
return faizisView;
}
}
My Main_Activity_XML_FILE is:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/faizisListView"
>
</ListView>
XML_FILE_FOR_customAdapter:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/_imageDisplay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/zaheer8423"
/>
<TextView
android:id="#+id/_foodDisplay"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.constraint.ConstraintLayout>
I haved saved image file in app/src/main/res/drawable/zaheer8423.jpg. I have connected my android device with android studio externally. When I run the app It opens and suddenly closes.
I have seen ways that use bitmap but I could not use them effectively, because I have very little knowledge about them.
Please help me here.

Answer 1

Looks like your Image size is big,You might need to scale down image something like this.
// Decode with inSampleSize
BitmapFactory.Options option = new BitmapFactory.Options();
option.inSampleSize = scale;
//You need to calculate appropriate sample size
Bitmap bitmap =
BitmapFactory.decodeResource(getContext().getResources(),R.drawable.zaheer8423,option);
imageDisplay.setImageBitmap(bitmap);
As its adapter you need to manage caching the bitmap and creating bitmap should be done in worker thread (Non Main thread i.e. UI Thread ) to avoid ANRs.