Database Users

[Help] Do my stuff after activity loads

Hello,
I'm trying to do something with my app but i dont know how =) maybe you can help me.
My main activity needs to initialize some parts of the app. It takes 2-5 seconds and I'd like to show the user a progress dialog.
the code im using is like
Code:
ProgressDialog tempdialog= ProgressDialog.show(this, "Loading", "Please Wait");
Config.init();
temdialog.cancel();
But i dont know where to put that code. I tried in onCreate(), onStart() and onResume(). But all them show a blackscreen while initializing and dialog is never shown.
Thanks in advance

removed

Thanks for the answer. I post my solution for helping others with the same problem
Code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
pd=ProgressDialog.show(this, "Loading", "Please wait");
Thread t = new Thread() {
public void run() {
try {
Config.init();
myHandler.sendEmptyMessage(0);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
t.start();
}
public Handler myHandler=new Handler() {
public void handleMessage(Message msg) {
pd.hide();
}
};

Android ICS SSL Authentication Help

Im trying to build an RSS feed reader that needs to do some client side SSL authentication.
Ive got, or at least think i have, the certificate and now cannot figure out how to setup a ssl tunnel to send the certificate to the server to authenticate.
here is what i have so far:
public class Authenticator extends Activity {
PrivateKey privateKey = null;
String SavedAlias = "";
private static final String TAG = "AUTHENTICATOR.CLASS";
final HttpParams httpParams = new BasicHttpParams();
private KeyStore mKeyStore = KeyStore.getInstance();
public Handler mHandler = new Handler(Looper.getMainLooper());
public void run()
{
mHandler.post(new Runnable() {
public void run() {
new AliasLoader().execute();
}
});
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getCertificates("TEST");
}
public class AliasLoader extends AsyncTask<Void, Void, X509Certificate[]>
{
X509Certificate[] chain = null;
@Override protected X509Certificate[] doInBackground(Void... params) {
android.os.Debug.waitForDebugger();
if(!SavedAlias.isEmpty())
{
try {
chain = KeyChain.getCertificateChain(getApplicationContext(),SavedAlias);
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
else
{
this.cancel(true);
}
return chain;
}
@Override
protected void onPostExecute(X509Certificate[] chain)
{
if(chain != null)
{
Toast.makeText(getApplicationContext(), "YAY, Certificate is not empty", Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(getApplicationContext(), "Certificate is Empty", Toast.LENGTH_LONG).show();
}
/*
if (privateKey != null) {
Signature signature = null;
try {
signature = Signature.getInstance("SHA1withRSA");
} catch (NoSuchAlgorithmException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
try {
signature.initSign(privateKey);
} catch (InvalidKeyException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
*/
}
}
public void getCertificates(String Host)
{
KeyChainAliasCallback callBack = new KeyChainAliasCallback() {
@Override
public void alias(String alias) {
if (alias != null)
{
Looper.prepare();
saveAlias(alias);
run();
Looper.loop();
}
}
};
KeyChain.choosePrivateKeyAlias(this, callBack,
new String[] {"RSA", "DSA"}, // List of acceptable key types. null for any
null, // issuer, null for any
null, // host name of server requesting the cert, null if unavailable
443, // port of server requesting the cert, -1 if unavailable
null); // alias to preselect, null if unavailable
}
public void saveAlias(String alias)
{
SavedAlias = alias;
}
}
Any help on how to do this would be greatly appreciated as i have never done any authentication before and i have found it difficult to find anything on this topic for android 4.0 as 4.0 seems to be different in implementation then the older versions.

Problem of flashlight app code (Eclipse)

Hello everyone ..
I have problem on developing a flashlight app
I tried the solutions that provided by Eclipse but none solved the problem
or even make any sense to me :angel:
every "Void" statement on the code appeared as an error
and i don't know why .. also i'm sure that everything on the code is correct
Examples of the errors:
private void playSound() {
private void toggleButtonImage() {
private void turnOffFlash() {
and .. etc , i got an error on every "Void" !
so.. i'm waiting for your opinions
Thanks in advance )​

Hi,
It is impossible for us to tell you what you have done wrong if you do not post your source code.
It could be just one character missing somewhere or one to much.
We need your code to help you.
(If you do not want to release it completely, copy your project and remove those parts you do not want us to see. This could also help you with finding the error yourself. )

nikwen said:
Hi,
It is impossible for us to tell you what you have done wrong if you do not post your source code.
It could be just one character missing somewhere or one to much.
We need your code to help you.
(If you do not want to release it completely, copy your project and remove those parts you do not want us to see. This could also help you with finding the error yourself. )
Click to expand...
Click to collapse
Thanks 4 answering me nikwen
i tried to post a screenshot of the problem but i'm a new member in the forum so i couldn't post an external link
anyway .. here's the Code
package com.mohamedsherif.flashlighttorch;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ToggleButton;
public class MainActivity extends Activity {
ImageButton switchButton;
private Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.switchButton);
//Check if the Device has Flash
hasFlash = getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if(!hasFlash) {
AlertDialog alert = new AlertDialog.Builder(MainActivity.this).create();
alert.setTitle("Error! ");
alert.setMessage("Sorry! .. Your device doesn't have a flash!");
alert.setButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(final DialogInterface dialog, final int which) {
finish();
}
});
alert.show();
return;
}
//Getting camera parameters
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to open. Error", e.getMessage());
}
}
}
private void turnOnFlash() {
if (!hasFlash) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
toggleButtonImage();
}
}
//Turning off flash
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
toggleButtonImage();
}
};
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
});
// Toggle buttons images
private void toggleButtonImage() {
if (isFlashOn) {
switchButton.setImageResource(R.drawable.switch_on);
} else {
switchButton.setImageResource(R.drawable.switch_off);
}
}
// Playing Sound
private void playSound() {
if (isFlashOn) {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_off);
} else {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_on);
}
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
mp.start();
}
}
@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;
}
}
Click to expand...
Click to collapse
the errors are in RED ​

little changes
private static Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
ToggleButton switchButton;
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_flashlight);
getCamera();
switchButton = (ToggleButton) findViewById(R.id.tglOnOffFlashlight);
switchButton.setOnClickListener(new View.OnClickListener() {
@override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
});
//Check if the Device has Flash
hasFlash = getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if(!hasFlash) {
AlertDialog alert = new AlertDialog.Builder(FlashlightActivity.this).create();
alert.setTitle("Error! ");
alert.setMessage("Sorry! .. Your device doesn't have a flash!");
alert.setButton("ok", new DialogInterface.OnClickListener() {
@override
public void onClick(final DialogInterface dialog, final int which) {
finish();
}
});
alert.show();
return;
}
}
//Getting camera parameters
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to open. Error", e.getMessage());
}
}
}
private void turnOnFlash() {
if (hasFlash) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
toggleButtonImage();
}
}
//Turning off flash
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
toggleButtonImage();
}
}
// Toggle buttons images
private void toggleButtonImage() {
if (isFlashOn) {
switchButton.setBackgroundResource(R.drawable.on_yellow );
} else {
switchButton.setBackgroundResource(R.drawable.off_white);
}
}
// Playing Sound
private void playSound() {
if (isFlashOn) {
mp = MediaPlayer.create(FlashlightActivity.this, R.raw.light_switch_off);
} else {
mp = MediaPlayer.create(FlashlightActivity.this, R.raw.light_switch_on);
}
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
mp.start();
}
these work

Does it work on other projects?
It is working for him, so I guess that the errors are not in the code but maybe your project setup or your installation of Eclipse and the Android SDK is the reason for that.
So to quote myself " Does it work on other projects?".
---------- Post added at 09:59 PM ---------- Previous post was at 09:55 PM ----------
Oh no, there are mistakes with the brackets.
For example you set a listener somewhere inside a methods. However, you forgot to close the bracket (I mean these ones {}). So it ends with a semicolon. It wants more lines of code.
So check your brackets.

Void methods should not return anything. So you can remove all 'return' words in the void methods.
Sent from my NexusHD2 using xda app-developers app

Eztys said:
Void methods should not return anything. So you can remove all 'return' words in the void methods.
Sent from my NexusHD2 using xda app-developers app
Click to expand...
Click to collapse
These returns ARE allowed. They are not necessary but allowed. You can stop the method by this.
It is really a problem with these brackets {}.

krsln said:
private static Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
ToggleButton switchButton;
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_flashlight);
getCamera();
switchButton = (ToggleButton) findViewById(R.id.tglOnOffFlashlight);
switchButton.setOnClickListener(new View.OnClickListener() {
@override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
these work
Click to expand...
Click to collapse
the same problem with the Void errors !! -.-
nikwen said:
Does it work on other projects?
It is working for him, so I guess that the errors are not in the code but maybe your project setup or your installation of Eclipse and the Android SDK is the reason for that.
So to quote myself " Does it work on other projects?".
---------- Post added at 09:59 PM ---------- Previous post was at 09:55 PM ----------
Oh no, there are mistakes with the brackets.
For example you set a listener somewhere inside a methods. However, you forgot to close the bracket (I mean these ones {}). So it ends with a semicolon. It wants more lines of code.
So check your brackets.
Click to expand...
Click to collapse
i tried the code on a new project but i got the same errors
also i don't think there's any problem with the brackets ?
Eztys said:
Void methods should not return anything. So you can remove all 'return' words in the void methods.
Sent from my NexusHD2 using xda app-developers app
Click to expand...
Click to collapse
the return is not the problem ​

i just solved the void errors but the app is not running on the virtual device !
"the app has stopped unexpectedly"
can anyone try the code ? or even tell me what's wrong ?
BTW the code doesn't contain any errors now .. not even the void errors
package com.mohamedsherif.flashlighttorch;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
public class MainActivity extends Activity {
ImageButton switchButton;
private Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
MediaPlayer mp;
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.switchButton);
//Check if the Device has Flash
hasFlash = getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if(!hasFlash) {
AlertDialog alert = new AlertDialog.Builder(MainActivity.this).create();
alert.setTitle("Error! ");
alert.setMessage("Sorry! .. Your device doesn't have a flash!");
alert.setButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(final DialogInterface dialog, final int which) {
finish();
}
});
alert.show();
return;
}
getCamera();
toggleButtonImage();
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
} else {
turnOnFlash();
}
}
});
}
//Getting camera parameters
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to open. Error: ", e.getMessage());
}
}
}
private void turnOnFlash() {
if (!hasFlash) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
toggleButtonImage();
}
}
//Turning off flash
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
toggleButtonImage();
}
};
// Toggle buttons images
private void toggleButtonImage() {
if (isFlashOn) {
switchButton.setImageResource(R.drawable.switch_on);
} else {
switchButton.setImageResource(R.drawable.switch_off);
}
}
// Playing Sound
private void playSound() {
if (isFlashOn) {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_off);
} else {
mp = MediaPlayer.create(MainActivity.this, R.raw.light_switch_on);
}
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
mp.start();
}
@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
turnOffFlash();
}
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
if (hasFlash)
turnOnFlash();
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
getCamera();
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
if (camera != null) {
camera.release();
camera = null;
}
}
@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;
}
}
Click to expand...
Click to collapse

M. Sherif said:
i just solved the void errors but the app is not running on the virtual device !
"the app has stopped unexpectedly"
can anyone try the code ? or even tell me what's wrong ?
BTW the code doesn't contain any errors now .. not even the void errors
​
Click to expand...
Click to collapse
There will be a logcat. Post it here.

How to record the Android Touch event?

I have to record the touch event of any android (.apk) application. For that I have created the .jar(Library) file which is responsible to record touch event when user press any control. This .jar will be injected with any .apk file.
For achieve the above things I have follow the below step.
1)I have created application with only one button name App.apk.
2)Also Create the another library project called Test.jar
3)Give the dependency of Test.jar to App.apk.
Now I want send same event to test.jar. I have write below code in App.apk activity
@override
public void onResume()
{
super.onResume();
Test.Event.MyHook(this);
}
@override
public void onPause()
{
super.onPause();
Test.Event.MyUnHook(this);
}
@override
public boolean dispatchKeyEvent(android.view.KeyEvent event)
{
Test.Event.MyEvent(event);
return super.dispatchKeyEvent(event);
}
Can u suggest the way to get button click event from App.apk to Test.jar ?
Thanks

maheng said:
I have to record the touch event of any android (.apk) application. For that I have created the .jar(Library) file which is responsible to record touch event when user press any control. This .jar will be injected with any .apk file.
For achieve the above things I have follow the below step.
1)I have created application with only one button name App.apk.
2)Also Create the another library project called Test.jar
3)Give the dependency of Test.jar to App.apk.
Now I want send same event to test.jar. I have write below code in App.apk activity
@override
public void onResume()
{
super.onResume();
Test.Event.MyHook(this);
}
@override
public void onPause()
{
super.onPause();
Test.Event.MyUnHook(this);
}
@override
public boolean dispatchKeyEvent(android.view.KeyEvent event)
{
Test.Event.MyEvent(event);
return super.dispatchKeyEvent(event);
}
Can u suggest the way to get button click event from App.apk to Test.jar ?
Thanks
Click to expand...
Click to collapse
Seems rather fishy why you'd have to do that, but let's roll with it...^^
TLDR: in pure java, using standard APIs or even reflection or root, you can't.
You could use the android-event-injector project (which is a C++/JNI library) : https://code.google.com/p/android-event-injector/
It provides methods to listen to all input events, something like that (this will send all the results to logcat):
PHP:
public void StartEventMonitor() {
m_bMonitorOn = true;
Thread b = new Thread(new Runnable() {
public void run() {
while (m_bMonitorOn) {
for (InputDevice idev:events.m_Devs) {
// Open more devices to see their messages
if (idev.getOpen() && (0 == idev.getPollingEvent())) {
final String line = idev.getName()+
":" + idev.getSuccessfulPollingType()+
" " + idev.getSuccessfulPollingCode() +
" " + idev.getSuccessfulPollingValue();
Log.d(LT, "Event:"+line);
}
}
}
}
});
b.start();
}
You can read more here: http://www.pocketmagic.net/2013/01/programmatically-injecting-events-on-android-part-2/
However, you might also be able to do that using the Xposed framework and finding a hook into the actual framework class for dispatchKeyEvent if it's the event you want to intercept.
I've never with Xposed so I can't really help you with the implementation, though, but it might be something to look into.

[Q]Problem using RootTools library

i am trying to list files of root folders using roottools libary .here is the code
Code:
public ArrayList<File> listFiles(final Context c,final String path) {
final ArrayList<File> a=new ArrayList<File>();
Command command = new Command(0, "ls "+path)
{
@Override
public void commandOutput(int i, String s) {
File f=new File(path+"/"+s);
a.add(f);}
@Override
public void commandTerminated(int i, String s) {
}
@Override
public void commandCompleted(int i, int i2) {
//want to arraylist return from here
}
};
try {
RootTools.getShell(true).add(command);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
now problem is that if i return arraylist<file> from the end of method,its size is zero,to solve it i must return the arraylist from commandCompleted
method.but i am not able to accomplish that.So please solve my problem

Maybee arraylist as static outside your function? So on top of source file? Not sure but maybee