Database Users

Why can't my GUI return back to recording mode despite having service?

Hi i'm new to android so that's why i come to find help... Hi an introduction to the app i'm doing here, i'm actually doing an car blackbox app..
I had my service run the video recording processes in the background so i should be able to leave the app for a while and come back to the Video recording GUI with the surfaceview but my application was force to close when i return to the app. So is the problem related to onResume() method or something else? If its yes what i should do in order to get my application GUI to return to the video recording surfaceview and still running the background recording using the service rather than giving me an error? Can someone help please...
Code:
public class CameraTest extends Activity implements SurfaceHolder.Callback {
private static final String TAG = "Exception";
public static SurfaceView surfaceView;
public static SurfaceHolder surfaceHolder;
public static Camera camera;
public static boolean previewRunning;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
surfaceView = (SurfaceView)findViewById(R.id.surface_camera);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Button btnStart = (Button) findViewById(R.id.button4);
btnStart.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
startService(new Intent(getApplicationContext(), ServiceRecording.class));
}
});
Button btnStop = (Button) findViewById(R.id.button5);
btnStop.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
stopService(new Intent(getApplicationContext(), ServiceRecording.class));
}
});
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
if (camera != null) {
Camera.Parameters params = camera.getParameters();
camera.setParameters(params);
}
else {
Toast.makeText(getApplicationContext(), "Camera not available!", Toast.LENGTH_LONG).show();
finish();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (previewRunning) {
camera.stopPreview();
}
Camera.Parameters p = camera.getParameters();
p.setPreviewSize(320, 240);
p.setPreviewFormat(PixelFormat.JPEG);
camera.setParameters(p);
try {
camera.setPreviewDisplay(holder);
camera.startPreview();
previewRunning = true;
}
catch (IOException e) {
Log.e(TAG,e.getMessage());
e.printStackTrace();
}
}
@Override
public void onResume(){
super.onResume();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder){
camera.stopPreview();
previewRunning = false;
camera.release();
}
}
My RecordingService.java Service file
Code:
public class ServiceRecording extends Service {
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private Camera camera;
private boolean recordingStatus;
private MediaRecorder mediaRecorder;
private final int maxDurationInMs = 20000;
private static final String TAG = "Exception";
@Override
public void onCreate() {
super.onCreate();
recordingStatus = false;
camera = CameraTest.camera;
surfaceView = CameraTest.surfaceView;
surfaceHolder = CameraTest.surfaceHolder;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
if (recordingStatus == false)
startRecording();
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
stopRecording();
//camera.stopPreview();
recordingStatus = false;
//camera.release();
}
public boolean startRecording(){
try {
Toast.makeText(getBaseContext(), "Recording Started", Toast.LENGTH_SHORT).show();
try{
camera.unlock();
}
catch(Exception e){
camera.reconnect();
}
mediaRecorder = new MediaRecorder();
mediaRecorder.setCamera(camera);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
mediaRecorder.setMaxDuration(maxDurationInMs);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
//mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH_mm_ss");
Date date = new Date();
File directory = new File(Environment.getExternalStorageDirectory() + "/VideoList");
if(!(directory.exists()))
directory.mkdir();
File FileSaved = new File(Environment.getExternalStorageDirectory() + "/VideoList", dateFormat.format(date) + ".3gp");
mediaRecorder.setOutputFile(FileSaved.getPath());
mediaRecorder.setVideoSize(surfaceView.getWidth(),surfaceView.getHeight());
//mediaRecorder.setVideoFrameRate(videoFramesPerSecond);
mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
mediaRecorder.prepare();
mediaRecorder.start();
recordingStatus = true;
return true;
}
catch (IllegalStateException e) {
Log.d(TAG,e.getMessage());
e.printStackTrace();
return false;
}
catch (IOException e) {
Log.d(TAG,e.getMessage());
e.printStackTrace();
return false;
}
}
public void stopRecording() {
Toast.makeText(getBaseContext(), "Recording Stopped", Toast.LENGTH_SHORT).show();
mediaRecorder.stop();
try {
camera.reconnect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
recordingStatus = false;
}
}

This is like the third time you've posted this. Convention dictates that you "bump" the existing thread rather than start a new one.
That said, I've considered replying each time, but I don't even know where to start. You seem to have a fundamental misunderstanding of OOP and java in general, and Android extensions specifically.
You can't use your CameraTest class the way you are in your service. You seem to be operating under the assumption that you can just declare some objects "static" (I'm assuming to get around compiler errors) and be able to access them as if they were some kind of global variables. You'll need to use bindings (AIDL) between your service and activity to properly synchronize calls between the two. This is a rather advanced topic and can't really be addressed in a reply.

Sorry i'm rather new to forums... By the way after your explanation i seems to get even more confused in a way, ya i'm rather confused/misunderstood OOP and java because i never really studied java before yet my lecturer still force me to do android for my project... Wow you're really good in spotting my problem.
Either way, i still don't seems to be able to return to my GUI recording preview homepage after i leaves the page, how should this problem be solve? Sorry if i'm rather slow/stupid to understand your "technical" descriptions...

[Q] How should i extract the appropriate video resolution and use in ListPreference?

I wanted to know is there any easy way to retrieve video resolution on the actual phone? Because different phone has different phone resolution's compatibility, so i wanted to retrieve the phone's resolution string data and display the different resolutions dynamically into my ListPreference for user selection...
Does it have to do with extracting the string from log.d, substituting the appropriate resolution values and populate into my ListPreference, does it have to do with some Split method? If so how should i do it i'm a newbie in java/android can someone guide me on how should i do that?
Code:
MainCamera.getParameters().get("preview-size-values");
Log.d("ServiceCamera", MainCamera.getParameters().flatten());
My MainActivity.java file
Code:
public class CameraTest extends Activity implements SurfaceHolder.Callback {
public static SurfaceView surfaceView;
public static SurfaceHolder surfaceHolder;
public static Camera MainCamera;
private static boolean previewRunning;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
surfaceView = (SurfaceView)findViewById(R.id.surface_camera);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Button btnStart = (Button) findViewById(R.id.button4);
btnStart.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
startService(new Intent(getApplicationContext(), ServiceRecording.class));
MainCamera.getParameters().get("preview-size-values");
Log.d("ServiceCamera", MainCamera.getParameters().flatten());
}
});
Button btnStop = (Button) findViewById(R.id.button5);
btnStop.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
stopService(new Intent(getApplicationContext(), ServiceRecording.class));
}
});
Button btnSetting = (Button) findViewById(R.id.button2);
btnSetting.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
startActivity(new Intent(getApplicationContext(), SettingActivity.class));
}
});
}
public static boolean ServiceStatus;
@Override
public void surfaceCreated(SurfaceHolder holder) {
if(ServiceRecording.recordingStatus)
{
stopService(new Intent(getApplicationContext(), ServiceRecording.class));
try {
Thread.sleep(4000);
}
catch (InterruptedException e) {
e.printStackTrace();
}
MainCamera = ServiceRecording.ServiceCamera;
startService(new Intent(getApplicationContext(), ServiceRecording.class));
}
else{
MainCamera = Camera.open();
if (MainCamera != null) {
Camera.Parameters params = MainCamera.getParameters();
params.setPreviewSize(320, 240);
params.setPreviewFormat(PixelFormat.JPEG);
MainCamera.setParameters(params);
try {
MainCamera.setPreviewDisplay(holder);
}
catch (IOException e)
{
e.printStackTrace();
}
MainCamera.startPreview();
previewRunning = true;
}
else {
Toast.makeText(getApplicationContext(), "Camera not available!", Toast.LENGTH_LONG).show();
finish();
}
}
if (previewRunning) {
MainCamera.stopPreview();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder){
MainCamera.stopPreview();
previewRunning = false;
MainCamera.release();
}
}
My Preference.xml file currently without any entryValues and entries because i don't seems to know how to populate the dynamic string Values??
Code:
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="Video">
<CheckBoxPreference
android:title="Audio"
android:defaultValue="True"
android:summary="Select w/o Audio"
android:key="AudioPref" />
<ListPreference
android:title="Video Encoder"
android:defaultValue="3gp"
android:summary="Select a video encoding type"
android:key="EncodingPref"
android:entries="@array/EncodingType"
android:entryValues="@array/updateEncodingType"
android:dialogTitle="Video Encoding Formats" />
<ListPreference
android:title="Video Resolution"
android:defaultValue="1"
android:summary="Select the video resolution"
android:key="ResolutionPref"
android:entries="@array/ "
android:entryValues="@array/ "
android:dialogTitle="Video Resolution" />
</PreferenceCategory>
</PreferenceScreen>

Can someone guide me on this above problem i'm facing??

I really need some guide from you guys please??

I know it has to do with split something but i'm kinna stuck here can someone guide me on this?? Even after i get the appropriate height and width how should i use the values to be used in ListPreferences?
Code:
String stringRes = MainCamera.getParameters().get("preview-size-values");
Log.d("ServiceCamera", MainCamera.getParameters().flatten());
String videoResolution[] = stringRes.split(",");
String resHeight[] = ;
String resWidth[] = ;

Need help with my app

Hi I'm working on a custom Android launcher I'm running into a little problem I have an image button that indicates show all applications but the problem is I don't know the code syntax to show all installed applications when that button is clicked!!
Please help I tried googling for the last four hours and getting very frustrated
Thanks in advance
Rapsong11
Sent from my Nexus 4 using xda app-developers app

Maybe you should use PackageManager to query the installed applications for you.
For example, when you want the list of launchable activities. You can do like this:
Code:
// create a intent for the query below
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
// add the intent category you want, if need
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
// get the instance of the package manager
PackageManager packageManager = context.getPackageManager();
// these are the activies you want
List<ResolveInfo> activities = packageManager.queryIntentActivities(mainIntent, 0);
Hope can help you

Code:
Here is my code:
package com.d4a.SchoolLauncher;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.view.View;
import android.widget.HorizontalScrollView;
import android.widget.ImageButton;
import android.widget.ScrollView;
import android.content.Context;
import com.d4a.SchoolLauncher.R;
public class LauncherActivity extends Activity{
[user=439709]@override[/user]
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//scroller
final HorizontalScrollView scroller= (HorizontalScrollView) findViewById(R.id.scroller);
scroller.setSmoothScrollingEnabled(true);
//apps
final ImageButton apps= (ImageButton) findViewById(R.id.all_apps); //my all apps button
apps.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
PackageManager packageManager = context.getPackageManager();
List<ResolveInfo> activities = packageManager.queryIntentActivities(mainIntent, 0);
}
});
final ImageButton wbrowser= (ImageButton) findViewById(R.id.wbrowser);
wbrowser.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
String url = "http://www.google.com";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
});
final ImageButton osettings= (ImageButton) findViewById(R.id.osettings);
osettings.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
startActivity(new Intent(Settings.ACTION_SETTINGS));
}
});
//remove from home screen button
//apps
final ImageButton delapps= (ImageButton) findViewById(R.id.delapps);
delapps.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
apps.setVisibility(View.GONE);
delapps.setVisibility(View.GONE);
}
});
//web browser
final ImageButton delwbrowser= (ImageButton) findViewById(R.id.delwbrowser);
delwbrowser.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
wbrowser.setVisibility(View.GONE);
delwbrowser.setVisibility(View.GONE);
}
});
//web browser
final ImageButton delosettings= (ImageButton) findViewById(R.id.dellosettings);
delosettings.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
osettings.setVisibility(View.GONE);
delosettings.setVisibility(View.GONE);
}
});
//add button
final ImageButton addshortcut= (ImageButton) findViewById(R.id.addshortcut);
addshortcut.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
startActivity(new Intent("com.PhysicsPhantom.Launcher"));
}
});
//done button
final ImageButton done= (ImageButton) findViewById(R.id.done);
done.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
delwbrowser.setVisibility(View.GONE);
delosettings.setVisibility(View.GONE);
delapps.setVisibility(View.GONE);
done.setVisibility(View.GONE);
addshortcut.setVisibility(View.GONE);
}
});
//edit button
final ImageButton edit= (ImageButton) findViewById(R.id.edit);
edit.setOnClickListener(new View.OnClickListener() {
[user=439709]@override[/user]
public void onClick(View v) {
if (apps.getVisibility()==View.VISIBLE){
delapps.setVisibility(View.VISIBLE);
}
if (wbrowser.getVisibility()==View.VISIBLE){
delwbrowser.setVisibility(View.VISIBLE);
}
if (osettings.getVisibility()==View.VISIBLE){
delosettings.setVisibility(View.VISIBLE);
}
done.setVisibility(View.VISIBLE);
addshortcut.setVisibility(View.VISIBLE);
}
});
//code to open editor for all delete buttons
//apps
apps.setOnLongClickListener(new View.OnLongClickListener() {
[user=439709]@override[/user]
public boolean onLongClick(View v) {
if (delapps.getVisibility()==View.GONE){
delapps.setVisibility(View.VISIBLE);
}
else{
delapps.setVisibility(View.GONE);
}
return true;
}
});
//web browser
wbrowser.setOnLongClickListener(new View.OnLongClickListener() {
[user=439709]@override[/user]
public boolean onLongClick(View v) {
if (delwbrowser.getVisibility()==View.GONE){
delwbrowser.setVisibility(View.VISIBLE);
}
else{
delwbrowser.setVisibility(View.GONE);
}
return true;
}
});
//settings
osettings.setOnLongClickListener(new View.OnLongClickListener() {
[user=439709]@override[/user]
public boolean onLongClick(View v) {
if (delosettings.getVisibility()==View.GONE){
delosettings.setVisibility(View.VISIBLE);
scroller.fullScroll(ScrollView.FOCUS_RIGHT);
}
else{
delosettings.setVisibility(View.GONE);
}
return true;
}
});
}
}
I get a error at: PackageManager packageManager = context.getPackageManager();
The error is as follows: context cannot be resolved
please help!!

[ code] tags would be helpful

out of ideas said:
[ code] tags would be helpful
Click to expand...
Click to collapse
just added code tags
sorry about that lol

You dont have startActivity in your launcher button

Can you please give me a code example fairly new to this
Sent from my Nexus 4 using xda app-developers app

Well, if you just want a activity list and launches when clicked, you can simply create a LauncherActivity.

Can you please show me using my code example where I would place that at? Thank you so much
Rapsong11
Sent from my Nexus 4 using xda app-developers app

rapsong11 said:
Can you please show me using my code example where I would place that at? Thank you so much
Rapsong11
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
1. create new class MyLauncherActivity
2. override the method "getTargetIntent()" in LauncherActivity
Code:
...
import android.app.LauncherActivity;
public class MyLauncherActivity extends LauncherActivity {
 [user=439709]@override[/user]
protected Intent getTargetIntent () {
// just a example, you should replace the method yourself
Intent intent = new Intent();
intent.setAction(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
return intent;
}
}
3. replace the code inside your onClick method to the R.id.all_apps button :
Code:
Intent intent = new Intent(this, MyLauncherActivity.class);
startActivity(intent);
4. don't forget to declare MyLauncherActivity in your AndroidMenifest.xml
5. try to do it yourself with others' experience, but not just ask for the code, that's not good for a coder. Wish you can understand this.

How to pass Object of Service to MyActivity?

<b>First of all: I am bigger in Android programming </b>
I have created simple TCP Socket using Service.
The client connects to server when the button in `MainActivity` is triggered.
Now i want to create `PrintWriter` object in `MainActivity` using `Socket` object of Service.
I got to know it is possible to pass objects from `Service` to `Activity` using JSON.
I searched over Internet but couldn't get an idea how I can pass it.
Please give me simple code example to pass the object.
MyService.java
public class MyService extends Service{
public static Socket clientsocket;
public static PrintWriter printer;
SendMessage sender;
@override
public void onCreate() {
Toast.makeText(this, "Created", Toast.LENGTH_LONG).show();
super.onCreate();
}
@override
public void onDestroy() {
Toast.makeText(this, "Stoped", Toast.LENGTH_LONG).show();
if(clientsocket!=null){
try{
clientsocket.close();
Toast.makeText(this, "Socket Closed", Toast.LENGTH_LONG).show();
}catch(IOException e){
e.printStackTrace();
}
}
}
@override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "Running", Toast.LENGTH_LONG).show();
SendMessage sender=new SendMessage();
sender.execute();
return super.onStartCommand(intent, flags, startId);
}
@override
public IBinder onBind(Intent arg0) {
return null;
}
class SendMessage extends AsyncTask<Void, Void, Void>{
@override
protected Void doInBackground(Void... params) {
try {
clientsocket = new Socket("192.168.237.1", 6666);
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@override
protected void onPostExecute(Void result) {
if(clientsocket!=null){
Toast.makeText(MyService.this, "Connected", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(MyService.this, "Lost Connection", Toast.LENGTH_LONG).show();
}
super.onPostExecute(result);
}
}}
MainActivity.java
public class MainActivity extends Activity {
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void start(View v){
startService(new Intent(this,MyService.class));
}
@override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
class PrintMessage extends AsyncTask<Void, Void, Void>{
@override
protected Void doInBackground(Void... arg0) {
return null;
}
}
@override
protected void onDestroy() {
stopService(new Intent(this,MyService.class));
super.onDestroy();
}}
<b><u>Now I need a clear & complete code for both MyService.java (how to pass object I.e. in this case `Socket` object `clientsocket` )and MainActivity.java (how to retreive passed object I.e. `clientsocket` and use it to create `PrintWriter` object) </u></b>

[DISCUSSION] Android Programming OnClickListener() usage

Hi guys. When i am writing code, i wondered something
Which OnClickListener type is more CPU and power friendly ?
A: Implementing OnClickListener to the Acitivity.
for example:
Code:
cpu_freq_limit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//something
}
});
B: Setting OnClickListener to a object. (like button)
for example:
Code:
@Override
public void onClick(View v) {
if(cpu_freq_limit==read) {
//something
}
}