A Simple example application to capture image/ selecting image from gallery.
This application includes sd card permission checking and FileUrilExposedException issue fix..
Step 1:
=========
Create an Activity like below
package org.pratap.cameraexample;
import android.Manifest;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
final int REQUEST_PERMISSIONS = 1001;
final int DELAY_TIME = 1000;
private static int NEW_IMAGE = 0;
private static int EXISTING_IMAGE = 1;
Button btn_capture_image, btn_galley_image;
ImageView img_photo;
String imageFilePath = "";
int imageType = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_capture_image = (Button) findViewById(R.id.btn_capture_image);
btn_galley_image = (Button) findViewById(R.id.btn_galley_image);
img_photo = (ImageView) findViewById(R.id.img_photo);
img_photo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
viewImage();
}
});
btn_capture_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkPermissions();
// for camera image
imageType = 0;
}
});
btn_galley_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkPermissions();
// for gallery image
imageType = 1;
}
});
}
private void checkPermissions() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
mHandler.sendEmptyMessageDelayed(1, DELAY_TIME);
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_PERMISSIONS);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == REQUEST_PERMISSIONS) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted
mHandler.sendEmptyMessageDelayed(1, DELAY_TIME);
} else {
// permission denied, boo!
}
}
}
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 1) {
// code goes here after getting permission
if (imageType == 0) {
takePictureFromCamera();
} else if (imageType == 1) {
pictureFromGallery();
}
}
}
};
public void takePictureFromCamera() {
imageFilePath = "";
File imageFile = createFileName();
imageFilePath = imageFile.getAbsolutePath();
Uri outputFileUri = null;
// if you are running nougat and above there is chance to crash
if (Build.VERSION.SDK_INT >= 24) {
outputFileUri = FileProvider.getUriForFile(MainActivity.this,
BuildConfig.APPLICATION_ID + ".provider",
imageFile);
} else {
outputFileUri = Uri.fromFile(imageFile);
}
if (outputFileUri != null) {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cameraIntent, NEW_IMAGE);
} else {
Toast.makeText(this, "URI not found", Toast.LENGTH_SHORT).show();
}
}
public void pictureFromGallery() {
try {
Intent i = new Intent(
Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, EXISTING_IMAGE);
} catch (ActivityNotFoundException anfe) {
// display an error message
String errorMessage = "Your device doesn't have gallery";
Toast toast = Toast
.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
public void viewImage() {
if (imageFilePath.length() != 0) {
try {
File file = new File(imageFilePath);
String documentType = getFileExtension(file);
Uri uri = null;
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= 24) {
uri = FileProvider.getUriForFile(MainActivity.this,
BuildConfig.APPLICATION_ID + ".provider",
file);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
} else {
uri = Uri.fromFile(file);
}
if (documentType.equalsIgnoreCase("jpg")) {
intent.setDataAndType(uri, "image/jpeg");
startActivity(intent);
} else if (documentType.equalsIgnoreCase("png")) {
intent.setDataAndType(uri, "image/png");
startActivity(intent);
} else {
intent.setDataAndType(uri, "*/*");
startActivity(intent);
}
} catch (ActivityNotFoundException e) {
e.printStackTrace();
}
} else {
Toast.makeText(MainActivity.this, "Image not selected.Please Select Image First", Toast.LENGTH_SHORT).show();
}
}
public File createFileName() {
final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/CameraEx/Images/";
File newDir = new File(dir);
if (!newDir.exists()) {
newDir.mkdirs();
}
String newFilename = "";
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
newFilename = sdf.format(date);
String filePath = dir + newFilename + ".jpg";
File newFile = new File(filePath);
try {
newFile.createNewFile();
} catch (IOException e) {
}
return newFile;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == EXISTING_IMAGE && resultCode == RESULT_OK
&& null != data) {
try {
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
imageFilePath = picturePath;
if (imageFilePath.length() != 0) {
// set ImageView with File Path
setImage(MainActivity.this, imageFilePath, img_photo);
Toast.makeText(MainActivity.this, "Image Saved : " + imageFilePath, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Image not selected.Please try again", Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
}
} else if (requestCode == NEW_IMAGE && resultCode == RESULT_OK) {
if (imageFilePath.length() != 0) {
// set ImageView with File Path
setImage(MainActivity.this, imageFilePath, img_photo);
Toast.makeText(MainActivity.this, "Image Saved : " + imageFilePath, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Image not selected.Please try again", Toast.LENGTH_SHORT).show();
}
}
}
public void setImage(Context ctx, String filePath, ImageView imgView) {
File actualImage = new File(filePath);
if (actualImage.exists()) {
Glide.with(ctx)
.load(actualImage)
.centerCrop()
.into(imgView);
} else {
Toast.makeText(ctx, "No File exists", Toast.LENGTH_SHORT).show();
}
}
public String getFileExtension(File file) {
String name = file.getName();
try {
return name.substring(name.lastIndexOf(".") + 1);
} catch (Exception e) {
return "";
}
}
}
XML Layout for the Activity
activity_main.xml
==============
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:gravity="center"
android:orientation="vertical"
tools:context="org.pratap.cameraexample.MainActivity">
<ImageView
android:id="@+id/img_photo"
android:layout_width="250dp"
android:layout_height="250dp"
android:background="#c9c9c9"
android:scaleType="centerCrop" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="24dp"
android:orientation="horizontal">
<Button
android:id="@+id/btn_capture_image"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Capture Image" />
<Button
android:id="@+id/btn_galley_image"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Galley Image" />
</LinearLayout>
</LinearLayout>
ScreenShot for Preview:
Step 2:
=========
Add the following code in AndroidManifest.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
like below
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.pratap.cameraexample">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
</application>
</manifest>
Step 3:
=====
create provider_paths xml file under xml folder
path should be like this
res/xml/provider_path.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
Some useful methods to convert Files to ByteArray or Base64 Encoded String
public static String getEncodedString(String filePath) throws FileNotFoundException, IOException {
String encodedDocument = "";
File file = new File(filePath);
byte[] binaryFile = new byte[(int) file.length()];
InputStream fis = new FileInputStream(file);
fis.read(binaryFile);
fis.close();
encodedDocument = Base64.encodeToString(binaryFile,
Base64.DEFAULT);
return encodedDocument;
}
public static byte[] getFileByteArray(String filePath) throws FileNotFoundException, IOException {
File file = new File(filePath);
FileInputStream fis = new FileInputStream(file);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[(int) file.length()];
try {
for (int readNum; (readNum = fis.read(buf)) != -1; ) {
bos.write(buf, 0, readNum);
}
} catch (IOException ex) {
Log.d("error", "error");
}
byte[] imagebytes = bos.toByteArray();
return imagebytes;
}
