MultiImageSelector

repositories {
 maven { url "https://jitpack.io" }
}
dependencies {
 compile 'com.github.lovetuzitong:MultiImageSelector:1.2'
}

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
 ...
 <!--Image Selector Entry-->
 <activity
 android:configChanges="orientation|screenSize"
 android:name="me.nereo.multi_image_selector.MultiImageSelectorActivity" />
</application>

// Multi image selector form an Activity
MultiImageSelector.create(Context)
 .start(Activity, REQUEST_IMAGE);

MultiImageSelector.create(Context)
 .showCamera(boolean) // show camera or not. true by default
 .count(int) // max select image size, 9 by default. used width #.multi()
 .single() // single mode
 .multi() // multi mode, default mode;
 .origin(ArrayList<String>) // original select data set, used width #.multi()
 .start(Activity/Fragment, REQUEST_IMAGE);

Intent intent = new Intent(mContext, MultiImageSelectorActivity.class);
// whether show camera
intent.putExtra(MultiImageSelectorActivity.EXTRA_SHOW_CAMERA, true);
// max select image amount
intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_COUNT, 9);
// select mode (MultiImageSelectorActivity.MODE_SINGLE OR MultiImageSelectorActivity.MODE_MULTI)
intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_MODE, MultiImageSelectorActivity.MODE_MULTI);
// default select images (support array list)
intent.putStringArrayListExtra(MultiImageSelectorActivity.EXTRA_DEFAULT_SELECTED_LIST, defaultDataArray);
startActivityForResult(intent, REQUEST_IMAGE);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 if(requestCode == REQUEST_IMAGE){
 if(resultCode == RESULT_OK){
	 // Get the result list of select image paths
 List<String> path = data.getStringArrayListExtra(MultiImageSelectorActivity.EXTRA_RESULT);
 // do your logic ....
 }
 }
}

class CustomerActivity extends Activity implements MultiImageSelectorFragment.Callback{
	@Override
 protected void onCreate(Bundle savedInstanceState) {
		// customer logic here...
		Bundle bundle = new Bundle();
 bundle.putInt(MultiImageSelectorFragment.EXTRA_SELECT_COUNT, mDefaultCount);
 bundle.putInt(MultiImageSelectorFragment.EXTRA_SELECT_MODE, mode);
 bundle.putBoolean(MultiImageSelectorFragment.EXTRA_SHOW_CAMERA, isShow);
 // Add fragment to your Activity
 getSupportFragmentManager().beginTransaction()
 .add(R.id.image_grid, Fragment.instantiate(this, MultiImageSelectorFragment.class.getName(), bundle))
 .commit();
	}
	@Override
 public void onSingleImageSelected(String path) {
 // When select mode set to MODE_SINGLE, this method will received result from fragment
 }
 @Override
 public void onImageSelected(String path) {
 // You can specify your ActionBar behavior here 
 }
 @Override
 public void onImageUnselected(String path) {
 // You can specify your ActionBar behavior here 
 }
 @Override
 public void onCameraShot(File imageFile) {
 // When user take phone by camera, this method will be called.
 }
}