Capture 5 images after a button click in android - android-camera

I am developing android application. The aim is to capture the 5 images after click a capture button. I am able to capture a single image by using the following code. But how can I take 5 images after a single button click. Please Can someone help me to do this?
Code snippet:
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import com.camera.facedetectionexample.R;
public class FaceDetectionExample extends Activity {
private static final int TAKE_PICTURE_CODE = 100;
private Bitmap cameraBitmap = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
((Button)findViewById(R.id.take_picture)).setOnClickListener(btnClick);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(TAKE_PICTURE_CODE == requestCode){
processCameraImage(data);
}
}
private void openCamera(){
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, TAKE_PICTURE_CODE);
}
private void processCameraImage(Intent intent){
setContentView(R.layout.detectlayout);
((Button)findViewById(R.id.detect_face)).setOnClickListener(btnClick);
ImageView imageView = (ImageView)findViewById(R.id.image_view);
cameraBitmap = (Bitmap)intent.getExtras().get("data");
imageView.setImageBitmap(cameraBitmap);
}
private View.OnClickListener btnClick = new View.OnClickListener() {
#Override
public void onClick(View v) {
switch(v.getId()){
case R.id.take_picture:
openCamera();
break;
}
}
};
}

you are going to want to use burst mode, have a look at
How to make burst mode available to Camera
should make it pretty clear.

Related

Use Datawedge with flutter

I am trying to use the datawedge intent API with my flutter application, on a Zebra android scanner. I started to use the Zebra EMDK API from a git repository, which works perfectly. Now I want to migrate it (which is recommended by Zebra) because I want it to be also available on mobiles (if it is possible).
I am trying to follow the instructions from this page and merge it with the code from the git repo, but no scan event is detected in my app.
Has someone already done this and could help me?
Here is my MainActivity.java:
package com.example.test_datawedge;
import android.os.Bundle;
import io.flutter.app.FlutterActivity;
import io.flutter.plugins.GeneratedPluginRegistrant;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
// import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import io.flutter.plugin.common.EventChannel;
import io.flutter.plugin.common.EventChannel.EventSink;
import io.flutter.plugin.common.EventChannel.StreamHandler;
import io.flutter.plugins.GeneratedPluginRegistrant;
import java.util.ArrayList;
public class MainActivity extends FlutterActivity {
private static final String BARCODE_RECEIVED_CHANNEL = "samples.flutter.io/barcodereceived";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GeneratedPluginRegistrant.registerWith(this);
// setContentView(R.layout.activity_main);
IntentFilter filter = new IntentFilter();
filter.addCategory(Intent.CATEGORY_DEFAULT);
filter.addAction(getResources().getString(R.string.activity_intent_filter_action));
// registerReceiver(myBroadcastReceiver, filter);
new EventChannel(getFlutterView(), BARCODE_RECEIVED_CHANNEL).setStreamHandler(
new StreamHandler() {
private BroadcastReceiver barcodeBroadcastReceiver;
#Override
public void onListen(Object arguments, EventSink events) {
Log.d("FLUTTERDEMO", "EventChannelOnListen");
barcodeBroadcastReceiver = createBarcodeBroadcastReceiver(events);
registerReceiver(
barcodeBroadcastReceiver, new IntentFilter("readBarcode"));
}
#Override
public void onCancel(Object arguments) {
Log.d("FLUTTERDEMO", "EventChannelOnCancel");
unregisterReceiver(barcodeBroadcastReceiver);
barcodeBroadcastReceiver = null;
}
}
);
}
// #Override
// protected void onDestroy()
// {
// super.onDestroy();
// unregisterReceiver(myBroadcastReceiver);
// }
//
// After registering the broadcast receiver, the next step (below) is to define it.
// Here it's done in the MainActivity.java, but also can be handled by a separate class.
// The logic of extracting the scanned data and displaying it on the screen
// is executed in its own method (later in the code). Note the use of the
// extra keys are defined in the strings.xml file.
//
private BroadcastReceiver createBarcodeBroadcastReceiver(final EventSink events) {
return new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Log.d("FLUTTERDEMO", "createBarcodeBroadcastReceiver " + action);
if(action.equals("readBarcode")){
String barcode = intent.getStringExtra("barcode");
String barcodetype = intent.getStringExtra("barcodetype");
Log.d("FLUTTERDEMO", "createBarcodeBroadcastReceiver " + barcode);
events.success(barcode);
}
}
};
}
//
// The section below assumes that a UI exists in which to place the data. A production
// application would be driving much of the behavior following a scan.
//
// private void displayScanResult(Intent initiatingIntent, String howDataReceived)
// {
// String decodedSource = initiatingIntent.getStringExtra(getResources().getString(R.string.datawedge_intent_key_source));
// String decodedData = initiatingIntent.getStringExtra(getResources().getString(R.string.datawedge_intent_key_data));
// String decodedLabelType = initiatingIntent.getStringExtra(getResources().getString(R.string.datawedge_intent_key_label_type));
// final TextView lblScanSource = (TextView) findViewById(R.id.lblScanSource);
// final TextView lblScanData = (TextView) findViewById(R.id.lblScanData);
// final TextView lblScanLabelType = (TextView) findViewById(R.id.lblScanDecoder);
// lblScanSource.setText(decodedSource + " " + howDataReceived);
// lblScanData.setText(decodedData);
// lblScanLabelType.setText(decodedLabelType);
// }
}
Zebra EMDK retrieves data by overriding the 'onStatus' and 'onData' functions.
Retrieve your barcode data from 'onData'

Android Studio says "Expression expected"

Android Studio tells there is an error in Java file, in string summonButton2(); Android Studio says "Expression expected".
I want the method summonButton2 to be launched automatically. I undesrtand that I'm doing it wrong. What exactly and is there any other way to start a method, except adding it to onCreate method? Thanks in advance.
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
int numberOfLinesLeft = 3;
Button secondaryActivityAddButton;
LinearLayout llForSecondaryButton;
LinearLayout llForSecondaryEditText;
EditText et;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
summonButton2();
}
public void summonButton2(View view){
llForSecondaryButton = findViewById(R.id.secondaryButton);
secondaryActivityAddButton = new Button(this);
secondaryActivityAddButton.setText("" + numberOfLinesLeft);
llForSecondaryButton.addView(secondaryActivityAddButton);
secondaryActivityAddButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
plusTextField();
if(numberOfLinesLeft == 0) {
view.setVisibility(View.GONE);
}
}
});
}
public void plusTextField() {
llForSecondaryEditText = findViewById(R.id.linearLayout1);
// add edittext
et = new EditText(this);
et.setText("text" + numberOfLinesLeft );
llForSecondaryEditText.addView(et);
numberOfLinesLeft--;
secondaryActivityAddButton.setText("" + numberOfLinesLeft);
}
}
summonButton2(new View(this));
Helped in my case.

How to save the current state of switches in Android Studio?

I know very little about programming. I downloaded Android Studio and started tinkering with it. I tried to make the app that they put on the tutorial and it worked. However I tried to add more functionality to it and I've failed so far. Excuse me if you see unnecessary junk on my code, I'm just kinda trying everything at first and I do feel a little misguided.
Anyways, onto the question. I have a Switch (id:toggle_text) with an OnClick action (change_font). When the switch is toggled it should change the font size of a different activity through intent1. Currently not only does it not send the font size variable (the variable keeps the default value you put on getIntExtra), but now that I tried to add the ability to save the current state it just shows errors. Here's the code:
package com.example.myfirstapp;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ToggleButton;
import android.widget.TextView;
import static com.example.myfirstapp.R.id.toggle_text;
import static com.example.myfirstapp.R.string.change_font;
public class ShowAnOption extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show_an_option);
SharedPreferences sharedPrefs = getSharedPreferences("com.example.xyz", MODE_PRIVATE);
toggle.setChecked(sharedPrefs.getBoolean("NameOfThingToSave", true));
}
public void change_font(View v) {
int fssize;
if (toggle.isChecked())
{
SharedPreferences.Editor editor = getSharedPreferences("com.example.xyz", MODE_PRIVATE).edit();
editor.putBoolean("NameOfThingToSave", true);
editor.commit();
fssize=20;
}
else
{
SharedPreferences.Editor editor = getSharedPreferences("com.example.xyz", MODE_PRIVATE).edit();
editor.putBoolean("NameOfThingToSave", false);
editor.commit();
fssize=40;
}
Intent intent1 = new Intent (getBaseContext(), DisplayMessageActivity.class);
intent1.putExtra("Font_Size", fssize);
}
}
It says "cannot resolve symbol toggle" on toggle.setChecked() and the if statement. What can I do to fix this? Also, why does it not get sent to the other activity? Here's the code on the other activity:
package com.example.myfirstapp;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.ViewGroup;
import android.widget.TextView;
public class DisplayMessageActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
Intent intent = getIntent();
Intent intent1 = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
int Font_Size = intent1.getIntExtra("Font_Size",50);
TextView textView = new TextView(this);
textView.setTextSize(Font_Size);
textView.setText(message);
ViewGroup layout = (ViewGroup) findViewById(R.id.activity_display_message);
layout.addView(textView);
}
}
Thanks and sorry for the long read. If there's anything else that needs to be known let me know and I'll gladly show.
We did not try to change the font size but here is how to use the switch widget.
Our design is two activities MainActivity and SwitchActivity we changed a CheckBox from unchecked to checked The switch is on the MainActivity code below
setOnCheckedChangeListener();
private void setOnCheckedChangeListener() {
swAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
Toast.makeText(MainActivity.this, "Switch On", Toast.LENGTH_SHORT).show();
Intent intentSP = new Intent(MainActivity.this, SwitchActivity.class );
Bundle extras = new Bundle();
extras.putString("FONT","true" );
intentSP.putExtras(extras);
startActivity( intentSP );
} else {
Toast.makeText(MainActivity.this, "Switch Off", Toast.LENGTH_SHORT).show();
}
}
});
}
Now in the SwitchAcvity we capture the value from the intent and fire the method
doWhat()
Intent intentSP = getIntent();
Bundle bundle = intentSP.getExtras();
tORf = bundle.getString("FONT");
doWhat(null);
And here is the doWhat method
public void doWhat(View view){
if(tORf.equals("true")){
chkBoxOne.setChecked(true);
}else {
Toast.makeText( SwitchActivity.this, "NOT TRUE", Toast.LENGTH_LONG ).show();
}
}

Android Check for Wireless connection upon Returning to Activity from Settings

My Android application is mainly a Webview (labeles WebViewActivity) that navigates a mobile website. I have a connection detector that opens another activity on every URL load if there is no wireless connection. From this next activity there is a button that opens up the Wireless Settings. Upon pressing the back button I would like for the second activity (labeled MainActivity) to refresh itself and continue back to whichever page my Webview had loaded. What do I need to change in the MainActivity.java to execute that?
My MainActivity:
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends Activity {
// flag for Internet connection status
Boolean isInternetPresent = false;
// Connection detector class
ConnectionDetector cd;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
}
#Override
protected void onRestart(){
if(checkConnection()){
Intent intent= new Intent(this, WebViewActivity.class);
startActivity(intent);
}
}
#Override
// Detect when the back button is pressed
public void onBackPressed() {
super.onBackPressed();
}
public void openSettings(View view){
Intent intent= new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);
startActivity(intent);
}
public boolean checkConnection(){
// creating connection detector class instance
cd = new ConnectionDetector(getApplicationContext());
//Get Internet Status
isInternetPresent = cd.isConnectingToInternet();
if(!isInternetPresent)
return false;
return true;
}
}
My WebviewActivity:
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class WebViewActivity extends Activity {
private WebView mWebView;
// flag for Internet connection status
Boolean isInternetPresent = false;
// Connection detector class
ConnectionDetector cd;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// TODO Auto-generated method stub
if (checkConnection()) {
mWebView = (WebView) findViewById(R.id.activity_main_webview);
// Enable Javascript
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
mWebView.loadUrl("http://my.fellowshipnwa.org/?publicapp");
// Force links and redirects to open in the WebView instead of in a browser
mWebView.setWebViewClient(new myWebClient());
} else {
openSplash();
}
}
#Override
// Detect when the back button is pressed
public void onBackPressed() {
if(mWebView.canGoBack()) {
mWebView.goBack();
} else {
// Let the system handle the back button
new AlertDialog.Builder(this)
.setTitle("Exit myFellowship App?")
.setMessage("Are you sure you want to exit?")
.setNegativeButton(android.R.string.no, null)
.setPositiveButton(android.R.string.yes, new OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
WebViewActivity.super.onBackPressed();
}
}).create().show();
}
}
public class myWebClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(!checkConnection()){
openSplash();
return true;
}else{
if( url.startsWith("tel:")){
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(url));
startActivity(intent);
return true;
}
else if( url.startsWith("mailto:")){
Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(url));
startActivity(intent);
return true;
}
}
return false;
}
}
public void openSplash(){
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
}
public boolean checkConnection(){
// creating connection detector class instance
cd = new ConnectionDetector(getApplicationContext());
//Get Internet Status
isInternetPresent = cd.isConnectingToInternet();
if(!isInternetPresent)
return false;
return true;
}
}
Any help is Greatly Appreciated! Even if it means telling me I goofed up on creating this question.
Thank you friends.
I played with it for a while and used a few other examples to piece together something that is working. One small hitch is if the user turns on a connection, but it is not quite connected when they return to the app it will stay on the ConnectorActivity. So I intercept the back button to check for a connection. If present, it will finish the current activity. Then, upon returning to the webview it will reload.
ConnectorActivity.java:
#Override
protected void onRestart(){
super.onRestart();
if(checkConnection()){
finish();
}
}
#Override
// Detect when the back button is pressed
public void onBackPressed() {
if(checkConnection()){
super.onBackPressed();
}
}
Piece from WebViewActivity.java:
#Override
protected void onRestart(){
super.onRestart();
mWebView.reload();
}

Why isn't the TextView working?

I'm coding an android program that arranges three words in alphabetical order using two simple activities.But in the second(output) activity,either the TextView or the Intents aren't working.The output isn't getting displayed.The java code for first(input) activity is as follows:
`package com.example.names;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Input extends Activity {
EditText t1,t2,t3;
final Context context=this;
String n[]=new String[100];
String t[]=new String[100];
String a1,a2,a3;
Button alpha;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.input);
t1=(EditText)findViewById(R.id.editText1);
t2=(EditText)findViewById(R.id.editText2);
t3=(EditText)findViewById(R.id.editText3);
n[0]=t1.getText().toString();
n[1]=t2.getText().toString();
n[2]=t3.getText().toString();
for(int j=0;j<2;j++)
{
for(int k=j+1;k<3;k++)
{
if(n[j].compareToIgnoreCase(n[k])>0)
{
String temp=n[j];
n[j]=n[k];
n[k]=temp;
}
}
}
a1=n[0];
a2=n[1];
a3=n[2];
alpha=(Button)findViewById(R.id.button1);
alpha.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i=new Intent(Input.this,Output.class);
i.putExtra("x", a1+a2+a3);
Toast.makeText(Input.this, "Method OnClick has been invoked",Toast.LENGTH_SHORT).show();
startActivity(i);
}
});}}`
And the java code for second activity is as follows:
package com.example.names;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class Output extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView p1=new TextView(this);
Bundle extras=getIntent().getExtras();
if (extras!=null){
String ans=extras.getString("x");
p1.setText(ans);
p1.setTextSize(50);
Toast.makeText(Output.this, "All lines have been executed",Toast.LENGTH_LONG).show();
setContentView(p1);
}};}
Why isn't the output getting displayed then???
The application is not crashing also.
Change your code with this below code.
Get edittext value when button is clicked.
Your Input Activity looks like this.
public class Input extends Activity {
EditText t1,t2,t3;
final Context context=this;
String n[]=new String[100];
String t[]=new String[100];
String a1,a2,a3;
Button alpha;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.input);
t1=(EditText)findViewById(R.id.editText1);
t2=(EditText)findViewById(R.id.editText2);
t3=(EditText)findViewById(R.id.editText3);
alpha=(Button)findViewById(R.id.button1);
alpha.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
n[0]=t1.getText().toString();
n[1]=t2.getText().toString();
n[2]=t3.getText().toString();
for(int j=0;j<2;j++)
{
for(int k=j+1;k<3;k++)
{
if(n[j].compareToIgnoreCase(n[k])>0)
{
String temp=n[j];
n[j]=n[k];
n[k]=temp;
}
}
}
a1=n[0];
a2=n[1];
a3=n[2];
Intent i=new Intent(Input.this,Output.class);
i.putExtra("x", a1+a2+a3);
Toast.makeText(Input.this, "Method OnClick has been invoked",Toast.LENGTH_SHORT).show();
startActivity(i);
}
});}}
Your Output Activity is fine it is working no changes in that activity.