1.1 Gallery
Step 1: Start Intent
Start from internal storage.
static final int GALLERY = 1; // The request code
…
private void pickPhoto() {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, GALLERY);
}
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Or start from external storage.
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
startActivityForResult(intent, GALLERY);
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Step 2: Activity callback
- Method 1: Use MediaStore to get the image.
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (requestCode == GALLERY) { //check the request code, to find the correct request
if (resultCode == RESULT_OK) {
Uri photoUri = intent.getData();
if (photoUri != null) {
try {
Bitmap m_bmOCRBitmap = MediaStore.Images.Media.getBitmap(this
.getContentResolver(), photoUri);
Drawable drawable = new BitmapDrawable(this.getResources(), m_bmOCRBitmap);
gridview.setBackground(drawable);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
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photoUri is something like this, “content://media/external/images/media/3951”or “content://com.android.providers.media.documents/document/image:3951”(Android 4.4). It represents the photo, need to use ContentResolver to get the file.
Note: setBackground() is for API level 16 above, for API level less than 16, please use setBackgroundDrawable() instead.
Method 2: Use MediaStore to get the image.
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(photoUri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
m_bmOCRBitmap = BitmapFactory.decodeFile(filePath);
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Step 3: Get permission
Should get the permission to read from external memory.
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
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1.2 Camera
Step 1: Start Intent
static final int CAMERA = 1337; // The request code
…
Intent cameraIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA);
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If want to save the captured file or want to crop the file, it needs to start as below.
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
/*create instance of File with name img.jpg*/
File file = new File(Environment.getExternalStorageDirectory()+File.separator + "img.jpg");
/*put uri as extra in intent object*/
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
/*start activity for result pass intent as argument and request code */
startActivityForResult(intent, CAMERA);
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Step 2: Activity callback
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (requestCode == CAMERA) { //check the request code, to find the correct request
if (resultCode == RESULT_OK) {
try {
Bitmap photo = (Bitmap) intent.getExtras().get("data");
//ByteArrayOutputStream stream = new ByteArrayOutputStream();
//photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
//byte[] byteArray = stream.toByteArray();
//strAttachmentCoded = new String(byteArray);
Drawable drawable = new BitmapDrawable(this.getResources(), photo);
gridview.setBackground(drawable);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
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Note: setBackground() is for API level 16 above, for API level less than 16, please use setBackgroundDrawable() instead.
Step 3: AndroidManifest.xml
Enable camera and get permission.
<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" />
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1.3 Croping image for small size return data
Step 1: Start Intent
static final int CROP = 3; // The request code
…
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(photoUri, "image/*");
cropIntent.putExtra("outputX", 96);
cropIntent.putExtra("outputY", 96);
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
cropIntent.putExtra("scale", true);
cropIntent.putExtra("return-data", true); // For small size photo only
startActivityForResult(cropIntent, CROP);
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Step 2: Activity callback
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (requestCode == CROP) { //check the request code, to find the correct request
if (resultCode == RESULT_OK) {
try {
Bitmap photo = (Bitmap) intent.getExtras().get("data");
Drawable drawable = new BitmapDrawable(this.getResources(), photo);
gridview.setBackground(drawable);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
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Note: setBackground() is for API level 16 above, for API level less than 16, please use setBackgroundDrawable() instead.
1.3 Croping image for large size return data
Step 1: Create a new file and get the Uri
private Uri getTempUri() {
return Uri.fromFile(getTempFile());
}
private File getTempFile() {
if (isSDCARDMounted()) {
File f = new File(Environment.getExternalStorageDirectory(),"Picture.jpg"); //Path should be the existing folder path
try {
f.createNewFile();
} catch (Exception e) {
// TODO Auto-generated catch block
Log.v("log_tag", "get file failed!");
}
return f;
} else {
return null;
}
}
private boolean isSDCARDMounted(){
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED))
return true;
return false;
}
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Step 2: Start Intent
static final int CROP = 3; // The request code
…
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(photoUri, "image/*");
cropIntent.putExtra("scale", true);
cropIntent.putExtra("return-data", false); // For large size photo
cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, getTempUri());
cropIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(cropIntent, CROP);
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Step 3: Activity callback
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (requestCode == CROP) { //check the request code, to find the correct request
if (resultCode == RESULT_OK) {
File tempFile = getTempFile();
String temppath = tempFile.getPath();
//FileInputStream fileis = null;
Log.v("log_tag", "File path:" + temppath);
try {
//fileis = new FileInputStream(tempFile);
Bitmap m_bmp = BitmapFactory.decodeFile(temppath); // Get bmp from file path
//Bitmap m_bmp = BitmapFactory.decodeStream(fileis); // Get bmp from file input stream
Drawable drawable = new BitmapDrawable(this.getResources(), m_bmp);
Log.v("log_tag", "first image : "+ m_bmp);
gridview.setBackground(drawable);
Log.v("log_tag", "Change background");
//Now you can upload this bitmap to server or do something else.
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
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Note: setBackground() is for API level 16 above, for API level less than 16, please use setBackgroundDrawable() instead.
Step 4: AndroidManifest.xml
Enable camera and get permission.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
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