Most of the android application will have a functionality to populate an imageview from camera or gallery.In this tutorial we will learn how to launch a camera application from your android app, how to populate Imageview with image populated from camera and how to select image from gallery and populate the Imageview in your android app.

Following is the code for launching camera

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(android.os.Environment.getExternalStorageDirectory(), "codesfor.jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
startActivityForResult(intent, 1);

Following is the code for launching Gallery

Intent intent = new   Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 2);

The results of the above two operations will be captured in your OnActivityResult method

Let us see the full code,In this tutorial we will show a popup to select camera or Gallery while clicking on floating button.

1.Creating New Project

1. Create a new project in Android Studio from File -> New Project
2. Fill the required fields like Application name and package name and click Next
3.  Select Basic activity and click Next, and click  Finish Button.A default activity will be created asMainActivity.java with layouts activity_main.xml and content_main.xml

2. Here is the code for your activity_main.xml

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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"
android:fitsSystemWindows="true"
tools:context="search.com.codesforcamera.MainActivity">

<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">

<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_main" />

<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_menu_camera" />

</android.support.design.widget.CoordinatorLayout>

3.Here is the code for content_main.xml

content_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp">

<ImageView
android:id="@+id/im_image"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_centerVertical="true" />

</RelativeLayout>

4.Now add the following code to your MainActivity.java

MainActivity.java

public class MainActivity extends AppCompatActivity {

Toolbar toolbar;
ImageView im_image;
FloatingActionButton fab_camera;

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

fab_camera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

Choose();
}
});

}

private void init() {

toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
im_image = (ImageView) findViewById(R.id.im_image);
fab_camera = (FloatingActionButton) findViewById(R.id.fab);

}

private void Choose() {

final CharSequence[] options_array = { "Camera", "Gallery" };

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Choose");
builder.setItems(options_array, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (options_array[item].equals("Camera"))
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(android.os.Environment.getExternalStorageDirectory(), "codesfor.jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
startActivityForResult(intent, 1);
}
else if (options_array[item].equals("Gallery"))
{
Intent intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 2);

}
}
});
builder.show();
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == 1) {
File f = new File(Environment.getExternalStorageDirectory().toString());
for (File temp : f.listFiles()) {
if (temp.getName().equals("codesfor.jpg")) {
f = temp;
break;
}
}
try {
Bitmap bitmap;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();

bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(),
bitmapOptions);

im_image.setImageBitmap(bitmap);

} catch (Exception e) {
e.printStackTrace();
}
} else if (requestCode == 2) {

Uri selectedImage = data.getData();
String[] filePath = { MediaStore.Images.Media.DATA };
Cursor c = getContentResolver().query(selectedImage,filePath, null, null, null);
c.moveToFirst();
int columnIndex = c.getColumnIndex(filePath[0]);
String picturePath = c.getString(columnIndex);
c.close();
Bitmap thumbnail = (BitmapFactory.decodeFile(picturePath));
im_image.setImageBitmap(thumbnail);
}
}
}

}

5. Following permissions are needed to be added in your AndroidManifest.xml

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

If you are using  targetSdkVersion greater than 22 in your gradle.build file ,then you need to add the permissions externally.

output