(ANDROID GPS)
actually i am new in android and since i am a c++ programmer so am facing some difficulty in this program which is to take the gps location of the android mobile and send it as sms to the given number. but since it is in java so please can someone tell me what the different XML for this program will be...i mean the string and main xmls
package com.adzz.gps;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.content.Context;
import android.telephony.SmsManager;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
String m;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LocationManager manager= (LocationManager)
this.getSystemService(Context.LOCATION_SERVICE);
LocationListener listener =new LocationListener() {
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onLocationChanged(Location location) {
final String phoneNumber="9453603045";
double lat1=location.getLatitude();
Double d1= new Double(lat1);
double longi1=location.getLongitude();
Double d2=new Double(longi1);
m="latitude = "+ d1.toString() + "and latitude = "+ d2.toString();
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNumber, null, m, null, null);
TextView lat= (TextView) findViewById(R.id.lat);
TextView longi=(TextView) findViewById(R.id.longi);
lat.setText("latitude = "+lat1);
longi.setText("longitude ="+longi1);
}
};
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 25,
listener);
Button b= (Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast toast=Toast.makeText(Main.this, m, 5000);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/lat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" />
<TextView
android:id="#+id/longi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" />
<Button
android:id="#id/button1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
First you need to create main.xml in layout folder in res directory. This is the main layout which is loading in your Activity , take two TextView inside main.xml with id named as lat and longi. main.xml is given below.
<?xml version="1.0" encoding="utf-8"?>
<TextView
android:id="#+id/lat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="195dp"
android:text="Lattitude" />
<TextView
android:id="#+id/longi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView2"
android:layout_alignParentTop="true"
android:layout_marginTop="82dp"
android:text="Longitude" />
Related
I am extremely new when it comes to Android Studio but have managed to put together 2 activities which work fine under separate apps, but when joined, it crashed when the MainActivity calls AddressActivity usingIntent and startActivity.
There is another problem which maybe related or may not be. When installing the app, there are NO permissions requested.
Here is my code:
AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COURSE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
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>
<activity
android:name=".AddressActivity"
android:label="login">
</activity>
</application>
MainActivity.class
package crproductionsptyltd.login;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import static crproductionsptyltd.login.R.id.driverid;
import static crproductionsptyltd.login.R.id.login;
public class MainActivity extends Activity {
EditText driverid;
Button btnOk;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
// find View-elements
btnOk = (Button) findViewById(login);
// btnOk.setOnClickListener(this)
// create click listener
View.OnClickListener oclBtnOk = new View.OnClickListener() {
#Override
public void onClick(View v) {
// change text of the TextView (tvOut)
btnOk.setText("Logging IN.....");
Intent i = new Intent(MainActivity.this, AddressActivity.class);
i.putExtra("driver_id", driverid.getText().toString());
startActivity(i);
};
};
// assign click listener to the OK button (btnOK)
btnOk.setOnClickListener(oclBtnOk);
// startActivity(new Intent(MainActivity.this, AddressActivity.class));
// Intent i = new Intent(MainActivity.this, NewActivity.class);//
// startActivity(i);
};
}
AddressActivity.class
package crproductionsptyltd.login;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.content.Intent;
public class AddressActivity extends Activity {
/**
* Called when the activity is first created.
*/
String lat = "", lon = "";
TextView tvView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gps);
tvView = (TextView) findViewById(R.id.tvView);
Intent intent = getIntent();
String driverid = intent.getStringExtra("driver_id");
tvView.setText("Your Driver ID is: " + driverid);
Button btnLocation = (Button) findViewById(R.id.btnLocation);
btnLocation.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) AddressActivity.this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
lat = Double.toString(location.getLatitude());
lon = Double.toString(location.getLongitude());
TextView tv = (TextView) findViewById(R.id.txtLoc);
tv.setText("Your Location is:" + lat + "--" + lon);
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
public void onProviderEnabled(String provider) {
}
public void onProviderDisabled(String provider) {
}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
}
});
Button btnSend = (Button) findViewById(R.id.btnSend);
btnSend.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
postData(lat, lon);
}
});
Button btnAdd = (Button) findViewById(R.id.btnAddress);
btnAdd.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
TextView tv = (TextView) findViewById(R.id.txtAddress);
tv.setText(GetAddress(lat, lon));
}
});
}
public void postData(String la, String lo) {
//URL url = new URL("https://www.autoflora.net/driver/gps.php?Driver_ID=877&latlong=" + lat + "*" + lon);
int TIMEOUT_VALUE = 15000;
try{
URL myUrl = new URL("https://www.autoflora.net/driver/gps.php?Driver_ID=877&latlong=" + lat + "*" + lon);
URLConnection connection = myUrl.openConnection();
connection.setConnectTimeout(TIMEOUT_VALUE);
connection.connect();
} catch (Exception e) {
}
}
public String GetAddress(String lat, String lon)
{
Geocoder geocoder = new Geocoder(this, Locale.ENGLISH);
String ret = "";
try {
List<Address> addresses = geocoder.getFromLocation(Double.parseDouble(lat), Double.parseDouble(lon), 1);
if(addresses != null) {
Address returnedAddress = addresses.get(0);
StringBuilder strReturnedAddress = new StringBuilder("Address:\n");
for(int i=0; i<returnedAddress.getMaxAddressLineIndex(); i++) {
strReturnedAddress.append(returnedAddress.getAddressLine(i)).append("\n");
}
ret = strReturnedAddress.toString();
}
else{
ret = "No Address returned!";
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
ret = "Can't get Address!";
}
return ret;
}
}
activity_login.xml
<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_horizontal"
android:orientation="vertical"
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="crproductionsptyltd.login.LoginActivity">
<!-- Login progress -->
<ProgressBar
android:id="#+id/login_progress"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:visibility="gone" />
<ScrollView
android:id="#+id/login_form"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/email_login_form"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<AutoCompleteTextView
android:id="#+id/driverid"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Driver ID"
android:inputType="textEmailAddress"
android:maxLines="1"
android:singleLine="true" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.design.widget.TextInputLayout>
<Button
android:id="#+id/login"
style="?android:textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="Login"
android:textStyle="bold"
android:onClick="checkDriver" />
</LinearLayout>
</ScrollView>
</LinearLayout>
activity_gps.class
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/txtLoc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/tvView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:textSize="20sp">
</TextView>
<Button
android:id="#+id/btnLocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Get my Location" />
<Button
android:id="#+id/btnSend"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send Location" />
<Button
android:id="#+id/btnAddress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Try Get Street Address" />
<TextView
android:id="#+id/txtAddress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
Based on your code, the app will crash here: i.putExtra("driver_id", driverid.getText().toString()), resulting in a NullPointerException. It crashes because you don't have an initialisation for EditText driverid; in onCreate and thus, it will throw an exception when used uninitialised.
To fix the problem you have to update the field in onCreate:
driverid = (EditText) findViewById(driverid);
I think, to use android.support.design.widget.TextInputLayout
you should use these dependencies
compile 'com.android.support:appcompat-v7:22.2.0'
compile 'com.android.support:design:22.2.0'
& also please correct
btnOk = (Button) findViewById(R.id.login); //wrongly added
driverid = (EditText) findViewById(R.id.driverid); // not added
(ANDROID GPS)
i made this application to send gps coordinates via sms but the app crashes(as soon as i open it) can somebody help me
logcat images
logcal image1
log cat image 2
MainActivity.java
package com.adzz.gps;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.content.Context;
import android.telephony.SmsManager;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
String m;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LocationManager manager= (LocationManager)
this.getSystemService(Context.LOCATION_SERVICE);
LocationListener listener =new LocationListener() {
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onLocationChanged(Location location) {
final String phoneNumber="9453603045";
double lat1=location.getLatitude();
Double d1= new Double(lat1);
double longi1=location.getLongitude();
Double d2=new Double(longi1);
m="latitude = "+ d1.toString() + "and latitude = "+ d2.toString();
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNumber, null, m, null, null);
TextView lat= (TextView) findViewById(R.id.lat);
TextView longi=(TextView) findViewById(R.id.longi);
lat.setText("latitude = "+lat1);
longi.setText("longitude ="+longi1);
}
};
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 25,
listener);
Button b= (Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast toast=Toast.makeText(Main.this, m, 5000);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/lat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" />
<TextView
android:id="#+id/longi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" />
<Button
android:id="#+id/button1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.adzz.gps001"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.adzz.gps001.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
In your manifest file you must include
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
Read the documentation under "Requesting User Permissions" for more details.
http://developer.android.com/guide/topics/location/strategies.html
Your app is failing because you need to add the android.permisssion.ACCESS_FINE_LOCATION permission to your manifest file.
(ANDROID GPS)
i made this application to send gps coordinates via sms but it doesn't seem to do any thing can anybody tell me what am i missing??
this is what logcat have to say on pressing the button
logcat image1
logcat image2
MainActivity.java
package com.adzz.gps;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.content.Context;
import android.telephony.SmsManager;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
String m;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LocationManager manager= (LocationManager)
this.getSystemService(Context.LOCATION_SERVICE);
LocationListener listener =new LocationListener() {
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onLocationChanged(Location location) {
final String phoneNumber="9453603045";
double lat1=location.getLatitude();
Double d1= new Double(lat1);
double longi1=location.getLongitude();
Double d2=new Double(longi1);
m="latitude = "+ d1.toString() + "and latitude = "+ d2.toString();
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNumber, null, m, null, null);
TextView lat= (TextView) findViewById(R.id.lat);
TextView longi=(TextView) findViewById(R.id.longi);
lat.setText("latitude = "+lat1);
longi.setText("longitude ="+longi1);
}
};
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 25,
listener);
Button b= (Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast toast=Toast.makeText(Main.this, m, 5000);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/lat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" />
<TextView
android:id="#+id/longi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" />
<Button
android:id="#+id/button1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.adzz.gps001"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses- permission>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.adzz.gps001.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
How about adding the permission for SMS in your AndroidManifest.xml?
<uses-permission android:name="android.permission.SEND_SMS" />
I have just started learning android. I have develop a program named Android Light Sensor that measure the Intensity of Light. Here is my code:
package com.AndroidLightSensor;
import com.example.andriodlightsensor.R;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
public class AndriodLightSensorActivity extends Activity {
ProgressBar lightMeter;
TextView textMax, textReading;
float counter;
Button read;
TextView display;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
counter = 0;
read = (Button) findViewById(R.id.bStart);
display = (TextView) findViewById(R.id.tvDisplay);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lightMeter = (ProgressBar)findViewById(R.id.lightmeter);
textMax = (TextView)findViewById(R.id.max);
textReading = (TextView)findViewById(R.id.reading);
SensorManager sensorManager
= (SensorManager)getSystemService(Context.SENSOR_SERVICE);
Sensor lightSensor
= sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
if (lightSensor == null){
Toast.makeText(AndriodLightSensorActivity.this,
"No Light Sensor! quit-",
Toast.LENGTH_LONG).show();
}else{
float max = lightSensor.getMaximumRange();
lightMeter.setMax((int)max);
textMax.setText("Max Reading(Lux): " + String.valueOf(max));
sensorManager.registerListener(lightSensorEventListener,
lightSensor,
SensorManager.SENSOR_DELAY_NORMAL);
}
}
SensorEventListener lightSensorEventListener
= new SensorEventListener(){
#Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
}
#Override
public void onSensorChanged(SensorEvent event) {
// TODO Auto-generated method stub
if(event.sensor.getType()==Sensor.TYPE_LIGHT){
final float currentReading = event.values[0];
lightMeter.setProgress((int)currentReading);
textReading.setText("Current Reading(Lux): " + String.valueOf(currentReading));
read.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
display.setText("" + String.valueOf(currentReading));
}
});
}
}
};
}
Also The xml is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/tvDisplay"
/>
<ProgressBar
android:id="#+id/lightmeter"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="80dp"
style="?android:attr/progressBarStyleHorizontal"
android:max="100"
android:progress="0"
/>
<TextView
android:id="#+id/max"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<TextView
android:id="#+id/reading"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:layout_width="250dp"
android:layout_height="wrap_content"
android:text="Start"
android:layout_y="249dp"
android:textSize="30dp"
android:onClick="onButtonDown"
android:id="#+id/bStart"
></Button>
</LinearLayout>
I want to get the current value whenever I press the button; i:e the value should not keep changing (Like in Stop Watch, but the updated should replace the previous one). In Eclipse, It shows no error, but when I run on my device is says" Unfortunately, Android Light Sensor has stopped."
Please help!!
There are an error that is obvious.
If findViewById is used before setContentView(R.layout.main); the values returned are null.
When you try to use them you get an error.
Put this two lines after setContentView(R.layout.main);
read = (Button) findViewById(R.id.bStart);
display = (TextView) findViewById(R.id.tvDisplay);
This is the content of the file: MainActivity.xml
package com.example.camera_test;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.hardware.Camera;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener()
{
#SuppressLint("NewApi") #Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
int i = Camera.getNumberOfCameras();
TextView age = (TextView) findViewById(R.id.textView1);
age.setText(i);
startActivityForResult( intent, 0 );
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
It was working good I clicked the button and it opened the camera application on my device !
But as soon as I added this lines:
int i = Camera.getNumberOfCameras();
TextView age = (TextView) findViewById(R.id.textView1);
age.setText(i);
Im getting the error on my device say nned to force close.
I tried also instead age.setText(I); this:
age.setText(Integer.toString(i));
I tried instead of id.textView1 also id.button1 but not working.
This is the content of activity_main.xml file:
<RelativeLayout 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"
tools:context=".MainActivity" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="#string/hello_world" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="45dp"
android:layout_marginTop="62dp"
android:text="Activate The Camera" />
</RelativeLayout>
This is the only two files I did changes.
Solution. Now when I click the button I see the camera then take a photo click on Done then I see the image I took on a small window in my device !
This is the MainActivity.Java fileL:
package com.example.camera_test;
import android.os.Build;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.hardware.Camera;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity {
private static final int CAMERA_PIC_REQUEST = 1337;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener()
{
#SuppressLint("NewApi") #Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
startActivityForResult( intent, CAMERA_PIC_REQUEST );
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_PIC_REQUEST) {
// do something
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ImageView image = (ImageView) findViewById(R.id.imageView1);
image.setImageBitmap(thumbnail);
}
}
}
And added to the activity_main.xml file imageView1 in the bottom:
<RelativeLayout 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"
tools:context=".MainActivity" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="#string/hello_world" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="45dp"
android:layout_marginTop="62dp"
android:text="Activate The Camera" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher" />
</RelativeLayout>
Now it's all working ! Thanks.