In this tutorial we will learn how to capture an image using Android Camera and how to pass this image from a Fragment back to Activity
Step: create a new Module "appSimpleCamera"
Step: design layout in "fragment_camera.xml"
Step: Add ImageView and Fragment container to activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
tools:ignore="MergeRootFrame">
<ImageView
android:id="@+id/picturePreviewThumb"
android:src="@android:drawable/ic_menu_gallery"
android:layout_width="70dp"
android:layout_height="70dp"
android:contentDescription="Photo Capture"
/>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/camera_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
Step: implement Fragment
package com.chicagoandroid.cit299.simplecamera;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
/**
* Camera fragment containing a simple view.
*/
public class CameraFragment extends Fragment {
ImageView takePhoto, picturePreview, savePhoto, cancel;
/** picturePreviewThumb belongs to Activity, not this Fragment **/
ImageView picturePreviewThumb;
Bitmap capturedPhoto;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_camera, container, false);
return rootView;
}
/**
* Add your UI elements and their functionality here,
* because in onCreateView(...) UI does not exist yet.
* @param savedInstanceState
*/
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Inside fragment you have to use getView()..
cancel = (ImageView) getView().findViewById(R.id.cancel);
takePhoto = (ImageView) getView().findViewById(R.id.takePhoto);
savePhoto = (ImageView) getView().findViewById(R.id.savePhoto);
savePhoto.setVisibility(View.INVISIBLE);
picturePreview = (ImageView) getView().findViewById(R.id.picturePreview);
takePhoto.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
useCameraApp();
}
});
savePhoto.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
passPhotoToActivity();
}
});
cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
clearScreen();
}
});
}
public void useCameraApp() {
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 0);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Bundle bundle = data.getExtras();
/** If user presses BACK BUTTON in Camera the bundle wil be null. **/
if (bundle != null) {
capturedPhoto = (Bitmap) bundle.get("data");
picturePreview.setImageBitmap(capturedPhoto);
savePhoto.setVisibility(View.VISIBLE);
}
}
private void passPhotoToActivity() {
picturePreviewThumb = (ImageView) getActivity().findViewById(R.id.picturePreviewThumb);
picturePreviewThumb.setImageBitmap(capturedPhoto);
}
private void clearScreen() {
/** Same as android:src="@android:drawable/ic_menu_gallery" **/
picturePreview.setImageResource(android.R.drawable.ic_menu_gallery);
savePhoto.setVisibility(View.INVISIBLE);
}
}
Step: implement MainActivity
package com.chicagoandroid.cit299.simplecamera;
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addCameraFragment(savedInstanceState);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* This method will be called in onCreate()
* @param bundle savedInstanceState
*/
private void addCameraFragment(Bundle bundle) {
int containerId = R.id.camera_fragment_container;
/**
* Verify that your activity layout include a fragment container.
* Depending on layout (size, orientation) and logic the container may not be present.
*/
if (findViewById(containerId) == null) {
return;
}
/** If restoring Activity do nothing to prevent creating existing Fragment. **/
if (bundle != null) {
return;
}
CameraFragment fragment = new CameraFragment();
/** Pass in calling Intent's values, setting the Bundle in constructor is not recommended **/
// Bundle bundle = getIntent().getExtras(); //another way to get the bundle
fragment.setArguments(bundle);
getSupportFragmentManager().beginTransaction().add(containerId, fragment).commit();
}
}
