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17:11
Explain:- How to Implement SignatureView in Android?
Open Your build.gradle and make sure that maven entral
repository is declared .
repositories {
jcenter()
mavenCentral()
}
jcenter()
mavenCentral()
}
Then include the library Dependency:
dependencies {
compile 'com.github.gcacace:signature-pad:1.2.0'
}
compile 'com.github.gcacace:signature-pad:1.2.0'
}
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activity_main.xml
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xml
version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.project.example.signatureviewdemoproject.MainActivity">
<com.github.gcacace.signaturepad.views.SignaturePad
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/signature_View" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="2"
android:orientation="horizontal">
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Clear Signature"
android:id="@+id/ClearButton"/>
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/SaveButton"
android:text="Save Signature"
android:layout_weight="1"/>
</LinearLayout>
</RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.project.example.signatureviewdemoproject.MainActivity">
<com.github.gcacace.signaturepad.views.SignaturePad
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/signature_View" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="2"
android:orientation="horizontal">
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Clear Signature"
android:id="@+id/ClearButton"/>
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/SaveButton"
android:text="Save Signature"
android:layout_weight="1"/>
</LinearLayout>
</RelativeLayout>
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MarshMallowPermission.Java
Add permission Class ,the class get permission on run
Time For MarshMallow.
.....................................................................................
public
class MarshMallowPermission {
public static final int RECORD_PERMISSION_REQUEST_CODE = 1;
public static final int EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE = 2;
public static final int CAMERA_PERMISSION_REQUEST_CODE = 3;
public static final int READ_PHONE_STATE_PERMISSION_REQUEST_CODE = 4;
Activity activity;
public MarshMallowPermission(Activity activity) {
this.activity = activity;
}
public boolean checkPermissionForRecord(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.RECORD_AUDIO);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public boolean checkPermissionForExternalStorage(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public boolean checkPermissionForCamera(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public boolean checkPermissionForReadPhoneState(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.READ_PHONE_STATE);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public void requestPermissionForRecord(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.RECORD_AUDIO)){
Toast.makeText(activity, "Microphone permission needed for recording. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.RECORD_AUDIO},RECORD_PERMISSION_REQUEST_CODE);
}
}
public void requestPermissionForExternalStorage(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE)){
Toast.makeText(activity, "External Storage permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE);
}
}
public void requestPermissionForCamera(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.CAMERA)){
Toast.makeText(activity, "Camera permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.CAMERA},CAMERA_PERMISSION_REQUEST_CODE);
}
}
public void requestPermissionReadPhoneState(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.READ_PHONE_STATE)){
Toast.makeText(activity, "Read Phone State permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.READ_PHONE_STATE},READ_PHONE_STATE_PERMISSION_REQUEST_CODE);
}
}
}
public static final int RECORD_PERMISSION_REQUEST_CODE = 1;
public static final int EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE = 2;
public static final int CAMERA_PERMISSION_REQUEST_CODE = 3;
public static final int READ_PHONE_STATE_PERMISSION_REQUEST_CODE = 4;
Activity activity;
public MarshMallowPermission(Activity activity) {
this.activity = activity;
}
public boolean checkPermissionForRecord(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.RECORD_AUDIO);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public boolean checkPermissionForExternalStorage(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public boolean checkPermissionForCamera(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public boolean checkPermissionForReadPhoneState(){
int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.READ_PHONE_STATE);
if (result == PackageManager.PERMISSION_GRANTED){
return true;
} else {
return false;
}
}
public void requestPermissionForRecord(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.RECORD_AUDIO)){
Toast.makeText(activity, "Microphone permission needed for recording. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.RECORD_AUDIO},RECORD_PERMISSION_REQUEST_CODE);
}
}
public void requestPermissionForExternalStorage(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE)){
Toast.makeText(activity, "External Storage permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE);
}
}
public void requestPermissionForCamera(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.CAMERA)){
Toast.makeText(activity, "Camera permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.CAMERA},CAMERA_PERMISSION_REQUEST_CODE);
}
}
public void requestPermissionReadPhoneState(){
if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.READ_PHONE_STATE)){
Toast.makeText(activity, "Read Phone State permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
} else {
ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.READ_PHONE_STATE},READ_PHONE_STATE_PERMISSION_REQUEST_CODE);
}
}
}
MainActivity.Java
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public
class MainActivity extends
AppCompatActivity implements View.OnClickListener {
private SignaturePad mSignatureView;
Button btnSvae, btnClear;
MarshMallowPermission permission;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSvae = (Button) findViewById(R.id.SaveButton);
btnSvae.setOnClickListener(this);
btnClear = (Button) findViewById(R.id.ClearButton);
btnClear.setOnClickListener(this);
mSignatureView = (SignaturePad) findViewById(R.id.signature_View);
mSignatureView.setOnSignedListener(new SignaturePad.OnSignedListener() {
@Override
public void onStartSigning() {
Toast.makeText(MainActivity.this, "OnStartSigning", Toast.LENGTH_SHORT).show();
}
@Override
public void onSigned() {
btnSvae.setEnabled(true);
btnClear.setEnabled(true);
}
@Override
public void onClear() {
btnSvae.setEnabled(false);
btnClear.setEnabled(false);
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.SaveButton:
permission=new MarshMallowPermission(this);
if (!permission.checkPermissionForExternalStorage()){
permission.requestPermissionForExternalStorage();
}else {
Bitmap signatureBitmap = mSignatureView.getSignatureBitmap();
if (addJpgSignatureToGallery(signatureBitmap)) {
Toast.makeText(MainActivity.this, "Signature saved into the Gallery", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Unable to store the signature", Toast.LENGTH_SHORT).show();
}
if (addSvgSignatureToGallery(mSignatureView.getSignatureSvg())) {
Toast.makeText(MainActivity.this, "SVG Signature saved into the Gallery", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Unable to store the SVG signature", Toast.LENGTH_SHORT).show();
}
}
break;
case R.id.ClearButton:
mSignatureView.clear();
break;
}
}
public File getAlbumStorageDir(String albumName) {
// Get the directory for the user's public pictures directory.
File file = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), albumName);
if (!file.mkdirs()) {
Log.e("SignaturePad", "Directory not created");
}
return file;
}
public void saveBitmapToJPG(Bitmap bitmap, File photo) throws IOException {
Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(newBitmap);
canvas.drawColor(Color.WHITE);
canvas.drawBitmap(bitmap, 0, 0, null);
OutputStream stream = new FileOutputStream(photo);
newBitmap.compress(Bitmap.CompressFormat.JPEG, 80, stream);
stream.close();
}
public boolean addJpgSignatureToGallery(Bitmap signature) {
boolean result = false;
try {
File photo = new File(getAlbumStorageDir("SignaturePad"), String.format("Signature_%d.jpg", System.currentTimeMillis()));
saveBitmapToJPG(signature, photo);
scanMediaFile(photo);
result = true;
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
private void scanMediaFile(File photo) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(photo);
mediaScanIntent.setData(contentUri);
MainActivity.this.sendBroadcast(mediaScanIntent);
}
public boolean addSvgSignatureToGallery(String signatureSvg) {
boolean result = false;
try {
File svgFile = new File(getAlbumStorageDir("SignaturePad"), String.format("Signature_%d.svg", System.currentTimeMillis()));
OutputStream stream = new FileOutputStream(svgFile);
OutputStreamWriter writer = new OutputStreamWriter(stream);
writer.write(signatureSvg);
writer.close();
stream.flush();
stream.close();
scanMediaFile(svgFile);
result = true;
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}
private SignaturePad mSignatureView;
Button btnSvae, btnClear;
MarshMallowPermission permission;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSvae = (Button) findViewById(R.id.SaveButton);
btnSvae.setOnClickListener(this);
btnClear = (Button) findViewById(R.id.ClearButton);
btnClear.setOnClickListener(this);
mSignatureView = (SignaturePad) findViewById(R.id.signature_View);
mSignatureView.setOnSignedListener(new SignaturePad.OnSignedListener() {
@Override
public void onStartSigning() {
Toast.makeText(MainActivity.this, "OnStartSigning", Toast.LENGTH_SHORT).show();
}
@Override
public void onSigned() {
btnSvae.setEnabled(true);
btnClear.setEnabled(true);
}
@Override
public void onClear() {
btnSvae.setEnabled(false);
btnClear.setEnabled(false);
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.SaveButton:
permission=new MarshMallowPermission(this);
if (!permission.checkPermissionForExternalStorage()){
permission.requestPermissionForExternalStorage();
}else {
Bitmap signatureBitmap = mSignatureView.getSignatureBitmap();
if (addJpgSignatureToGallery(signatureBitmap)) {
Toast.makeText(MainActivity.this, "Signature saved into the Gallery", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Unable to store the signature", Toast.LENGTH_SHORT).show();
}
if (addSvgSignatureToGallery(mSignatureView.getSignatureSvg())) {
Toast.makeText(MainActivity.this, "SVG Signature saved into the Gallery", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Unable to store the SVG signature", Toast.LENGTH_SHORT).show();
}
}
break;
case R.id.ClearButton:
mSignatureView.clear();
break;
}
}
public File getAlbumStorageDir(String albumName) {
// Get the directory for the user's public pictures directory.
File file = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), albumName);
if (!file.mkdirs()) {
Log.e("SignaturePad", "Directory not created");
}
return file;
}
public void saveBitmapToJPG(Bitmap bitmap, File photo) throws IOException {
Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(newBitmap);
canvas.drawColor(Color.WHITE);
canvas.drawBitmap(bitmap, 0, 0, null);
OutputStream stream = new FileOutputStream(photo);
newBitmap.compress(Bitmap.CompressFormat.JPEG, 80, stream);
stream.close();
}
public boolean addJpgSignatureToGallery(Bitmap signature) {
boolean result = false;
try {
File photo = new File(getAlbumStorageDir("SignaturePad"), String.format("Signature_%d.jpg", System.currentTimeMillis()));
saveBitmapToJPG(signature, photo);
scanMediaFile(photo);
result = true;
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
private void scanMediaFile(File photo) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(photo);
mediaScanIntent.setData(contentUri);
MainActivity.this.sendBroadcast(mediaScanIntent);
}
public boolean addSvgSignatureToGallery(String signatureSvg) {
boolean result = false;
try {
File svgFile = new File(getAlbumStorageDir("SignaturePad"), String.format("Signature_%d.svg", System.currentTimeMillis()));
OutputStream stream = new FileOutputStream(svgFile);
OutputStreamWriter writer = new OutputStreamWriter(stream);
writer.write(signatureSvg);
writer.close();
stream.flush();
stream.close();
scanMediaFile(svgFile);
result = true;
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}
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