In a special app for android i need to make a service that play a sound for hours and control it by my service ... but sound player`s code does not work in any method of my service class :((
my player class that extend from Service class :
package org.tooj;
import org.qtproject.example.Book.R;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
public class Player extends Service {
MediaPlayer Player;
#Override
public void onCreate() {
}
#Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
//my player
public int onStartCommand(Intent intent, int flags, int startId) {
Player = MediaPlayer.create(ToojActivity.getInstance(),R.ra w.alfa);
Player.setLooping(true);
Player.setVolume(1,1);
Player.start();
return 1;
}
public void onStart(Intent intent, int startId) {
// TO DO
}
public IBinder onUnBind(Intent arg0) {
// TO DO Auto-generated method
return null;
}
public void onStop() {
}
public void onPause() {
}
#Override
public void onDestroy() {
Player.stop();
Player.release();
}
#Override
public void onLowMemory() {
}
}
my main activity :
package org.tooj;
import android.annotation.TargetApi;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
import android.view.WindowManager;
import org.qtproject.qt5.android.bindings.QtActivity;
public class ToojActivity extends QtActivity{
private static ToojActivity instance;
private boolean _transparentStatusBar = false;
private boolean _transparentNavigationBar = false;
public ToojActivity(){
instance = this;
Log.i("ToojActivity", "ctor");
}
#TargetApi(Build.VERSION_CODES.KITKAT)
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
Intent svc=new Intent(this, Player.class); // call service
startService(svc);
public static ToojActivity getInstance() {
return ToojActivity.instance;
}
public void SetStatusBarIsTransparent(boolean value) {
_transparentStatusBar = value;
}
public void GetNavigationBarIsTransparent(boolean value) {
_transparentNavigationBar = value;
}
public boolean GetStatusBarIsTransparent() {
return _transparentStatusBar;
}
public boolean GetNavigationBarIsTransparent() {
return _transparentNavigationBar;
}
}
and manifest ...
<?xml version='1.0' encoding='utf-8'?>
<manifest package="org.qtproject.example.Book" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="1.0" android:versionCode="1" android:installLocation="auto">
<application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="Book">
<activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation"
android:name="org.tooj.ToojActivity"
android:label="Book"
android:screenOrientation="unspecified"
android:launchMode="singleTop">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
<meta-data android:name="android.app.lib_name" android:value="Book"/>
<meta-data android:name="android.app.qt_sources_resource_id" android:resource="#array/qt_sources"/>
<meta-data android:name="android.app.repository" android:value="default"/>
<meta-data android:name="android.app.qt_libs_resource_id" android:resource="#array/qt_libs"/>
<meta-data android:name="android.app.bundled_libs_resource_id" android:resource="#array/bundled_libs"/>
<!-- Deploy Qt libs as part of package -->
<meta-data android:name="android.app.bundle_local_qt_libs" android:value="1"/>
<meta-data android:name="android.app.bundled_in_lib_resource_id" android:resource="#array/bundled_in_lib"/>
<meta-data android:name="android.app.bundled_in_assets_resource_id" android:resource="#array/bundled_in_assets"/>
<!-- Run with local libs -->
<meta-data android:name="android.app.use_local_qt_libs" android:value="1"/>
<meta-data android:name="android.app.libs_prefix" android:value="/data/local/tmp/qt/"/>
<meta-data android:name="android.app.load_local_libs" android:value="plugins/platforms/android/libqtforandroid.so:plugins/bearer/libqandroidbearer.so:lib/libQt5QuickParticles.so:plugins/mediaservice/libqtmedia_android.so:lib/libQt5MultimediaQuick_p.so"/>
<meta-data android:name="android.app.load_local_jars" android:value="jar/QtAndroid.jar:jar/QtAndroidAccessibility.jar:jar/QtAndroid-bundled.jar:jar/QtAndroidAccessibility-bundled.jar:jar/QtAndroidBearer.jar:jar/QtAndroidBearer-bundled.jar:jar/QtMultimedia.jar:jar/QtMultimedia-bundled.jar"/>
<meta-data android:name="android.app.static_init_classes" android:value="org.qtproject.qt5.android.multimedia.QtMultimediaUtils:org.qtproject.qt5.android.multimedia.QtMultimediaUtils"/>
<!-- Messages maps -->
<meta-data android:value="#string/ministro_not_found_msg" android:name="android.app.ministro_not_found_msg"/>
<meta-data android:value="#string/ministro_needed_msg" android:name="android.app.ministro_needed_msg"/>
<meta-data android:value="#string/fatal_error_msg" android:name="android.app.fatal_error_msg"/>
<!-- Messages maps -->
<!-- Splash screen -->
<!--
<meta-data android:name="android.app.splash_screen_drawable" android:resource="#drawable/logo"/>
-->
<!-- Splash screen -->
<!-- Background running -->
<!-- Warning: changing this value to true may cause unexpected crashes if the
application still try to draw after
"applicationStateChanged(Qt::ApplicationSuspended)"
signal is sent! -->
<meta-data android:name="android.app.background_running" android:value="false"/>
<!-- Background running -->
</activity>
<service android:enabled="true" android:name=".Player" />
</application>
<uses-sdk android:minSdkVersion="9" android:targetSdkVersion="14"/>
<supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
<!-- The following comment will be replaced upon deployment with default permissions based on the dependencies of the application.
Remove the comment if you do not require these default permissions. -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<!-- The following comment will be replaced upon deployment with default features based on the dependencies of the application.
Remove the comment if you do not require these default features. -->
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-feature android:name="android.hardware.camera.autofocus" android:required="false" />
<uses-feature android:name="android.hardware.microphone" android:required="false" />
<uses-feature android:glEsVersion="0x00020000" android:required="true" />
</manifest>
Related
I have created watchface for android wear and my code is as follows:
ComapnionConfigActivity (in mobile module):
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.wearable.Wearable;
public class CompanionConfigActivity extends ActionBarActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
private GoogleApiClient mGoogleApiClient;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_companion_config);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Wearable.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
#Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
#Override
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_watch_config, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onConnected(Bundle bundle) {
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
}
Manifest for mobile module:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.agile.mywatchface" >
<uses-permission android:name="com.google.android.permission.PROVIDE_BACKGROUND" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="#drawable/square"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".CompanionConfigActivity"
android:label="#string/title_activity_watch_config" >
<intent-filter>
<action android:name="com.example.agile.mywatchface.MAIN" />
<category android:name= "com.google.android.wearable.watchface.category.COMPANION_CONFIGURATION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
MyWatchfaceService: (service in wear module for drawing watchface)
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.support.wearable.watchface.CanvasWatchFaceService;
import android.view.SurfaceHolder;
import java.util.Calendar;
import java.util.Timer;
import java.util.TimerTask;
/**
*
* Created by agile on 3/5/2015.
*/
public class MyWatchfaceService extends CanvasWatchFaceService{
Calendar c;
int hrs,min,sec,width,height;
Timer timer;
TimerTask timerTask;
Paint paint;
#Override
public Engine onCreateEngine() {
return new MyEngine();
}
class MyEngine extends CanvasWatchFaceService.Engine {
#Override
public void onCreate(SurfaceHolder holder) {
super.onCreate(holder);
timer = new Timer();
timerTask = new MyTimerTask();
c = Calendar.getInstance();
paint = new Paint();
paint.setColor(Color.BLUE);
paint.setTextSize(18);
}
#Override
public void onPropertiesChanged(Bundle properties) {
super.onPropertiesChanged(properties);
}
#Override
public void onTimeTick() {
super.onTimeTick();
}
#Override
public void onDraw(Canvas canvas, Rect bounds) {
updateTimeOnEachSecond();
width = bounds.width();
height = bounds.height();
canvas.drawText(String.valueOf(hrs)+":"+String.valueOf(min)+":"+String.valueOf(sec),width/2,height/2,paint);
}
#Override
public void onVisibilityChanged(boolean visible) {
super.onVisibilityChanged(visible);
}
}
public void updateTimeOnEachSecond() {
timer.scheduleAtFixedRate(timerTask, 0, 1000);
}
class MyTimerTask extends TimerTask {
public void run(){
hrs = c.get(Calendar.HOUR_OF_DAY);
min = c.get(Calendar.MINUTE);
sec = c.get(Calendar.SECOND);
}
}
}
Manifest for wear module:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.agile.mywatchface" >
<uses-feature android:name="android.hardware.type.watch" />
<uses-permission android:name="com.google.android.permission.PROVIDE_BACKGROUND" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="#drawable/square"
android:label="#string/app_name"
>
<service
android:name=".MyWatchfaceService"
android:label="#string/app_name"
android:permission="android.permission.BIND_WALLPAPER"
android:allowEmbedded="true"
>
<!-- companion configuration activity -->
<meta-data
android:name="android.service.wallpaper"
android:resource="#xml/watch_face" />
<meta-data
android:name="com.example.agile.mywatchface.preview"
android:resource="#drawable/square" />
<meta-data
android:name="com.example.agile.mywatchface.preview_circular"
android:resource="#drawable/square" />
<meta-data
android:name="com.google.android.wearable.watchface.companionConfigurationAction"
android:value="com.example.agile.mywatchface.MAIN" />
<!-- wearable configuration activity -->
<meta-data
android:name="com.google.android.wearable.watchface.wearableConfigurationAction"
android:value="com.example.agile.mywatchface.MAIN" />
<intent-filter>
<action android:name="android.service.wallpaper.WallpaperService" />
<category android:name="com.example.agile.mywatchface.category.WATCH_FACE" />
</intent-filter>
</service>
<activity
android:name=".WearConfigActivity"
android:label="#string/title_activity_wear_config"
android:allowEmbedded="true">
<intent-filter>
<action android:name="com.example.agile.mywatchface.CONFIG_DIGITAL" />
<category android:name=
"com.google.android.wearable.watchface.category.WEARABLE_CONFIGURATION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<meta-data
android:name="com.google.android.wearable.watchface.wearableConfigurationAction"
android:value="com.example.agile.mywatchface.MAIN" />
</activity>
</application>
</manifest>
I have followed official guide for creating watchface. But, when I install the app, it isn't showing in companion app. It seems like the problem is in manifest or companionconfigactivity. I tried for more than a day but couldn't identify it. Can anyone help me out?
In your Wearable Manifest you have following line:
<category android:name="com.example.agile.mywatchface.category.WATCH_FACE" />
This is incorrect, you need to use
<category android:name="com.google.android.wearable.watchface.category.WATCH_FACE" />
Android Wear looks for services with this category in the filter, it will ignore yours if you use custom category.
I am implementing a simple application executing a background service, I am not able to start the service, following is my Manifest & Code, the service class is properly resolved ( reading resources ), inheriting from IntentService ( and implementing the req methods ) doesn't resolve the problem as-well...
Why does the Background service doesn't start?
any help will be appreciated.
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.newcomp.vagent"
android:versionCode="1"
android:versionName="1.0"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="20" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<receiver android:name="com.newcomp.Infrastructure.BootStarter" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".CaptureService"
android:exported="true"
android:process=":captureService" >
</service>
</application>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
</manifest>
Service code:
package com.newcomp.vagent;
import android.app.IntentService;
import android.app.Service;
import android.content.Intent;
import android.R.*;
import android.os.IBinder;
import java.io.IOException;
import fi.iki.elonen.NanoHTTPD;
public class CaptureService extends Service {
public CaptureService() {
//super("Capture Service");
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
return Service.START_NOT_STICKY;
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
}
}
Activity code:
package com.newcomp.vagent;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
final String strSvcName = getResources().getString(R.string.startup_service);
//setContentView(R.layout.main);
Toast.makeText(getBaseContext(), String.format("Hello from '%s'", strSvcName), Toast.LENGTH_LONG).show();
Class cls = null;
try {
cls = getClassLoader().loadClass(strSvcName);
startService(new Intent(this, cls));// Starts the service
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
//finish();
}
}
The problem was simple, the service was actually starting but since android:process=":captureService" was specified it was starting on a separate process, one that is not connected by the debugger, either specifcally connecting to the service process, OR, omitting android:process=":captureService" resolve the problem.
I am currently trying to implement an app that has a service running until the user explicitly ends it via the app.
The service runs even when I exit the app(which is ok)
But when I enter the app again and try to stop the service, the app stops running.
What am I doing wrong?
This is the service code
package com.mac.service;
import android.app.Service;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationManager;
import android.os.Handler;
import android.os.IBinder;
import android.widget.Toast;
public class MyService extends Service {
private Handler handler = new Handler();
private long timeAndSpace = 5000;
Thread t;
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
}
#Override
public void onDestroy() {
super.onDestroy();
handler.removeCallbacksAndMessages(null);
Toast.makeText(this, "Service Stopped ...", Toast.LENGTH_SHORT).show();
}
#Override
public void onStart(Intent intent, int startid) {
}
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(getBaseContext(), "Service Started", Toast.LENGTH_SHORT)
.show();
final Runnable r = new Runnable() {
public void run() {
Location l = getMine();
Toast.makeText(
getApplicationContext(),
String.valueOf(l.getLatitude()) + " "
+ String.valueOf(l.getLongitude()),
Toast.LENGTH_SHORT).show();
handler.postDelayed(this, timeAndSpace);
}
};
handler.postDelayed(r, timeAndSpace);
return START_STICKY;
}
private Location getMine() {
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
Location myLocation = locationManager.getLastKnownLocation(provider);
return myLocation;
}
}
and this the manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mac.service"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="12"
android:targetSdkVersion="19" />
<uses-permission android:name="com.mac.maps2demo.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<!-- Requires OpenGL ES version 2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.mac.service.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>
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<service
android:name="com.mac.service.MyService"
android:enabled="true"
android:exported="true" />
</application>
</manifest>
This is my MainActivity
it is wrong about level of API ??
i am using Google API
API level 18
package com.example.map;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MapView myMap = (MapView) findViewById(R.id.mapView);
final MapController controller = myMap.getController();
LocationManager manager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
LocationListener listener = new LocationListener(){
#Override
public void onLocationChanged(Location location) {
controller.setCenter(new GeoPoint((int)location.getLatitude(),(int)location.getLongitude()));
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
// TODO Auto-generated method stub
}
};
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);
}
}
This is my Manifest
The uses_permission is necessary ??
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.map"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="11" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<uses-library
android:name="com.google.android.maps" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="API_KEY"/>
<activity
android:name="com.example.map.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>
This is my activity_main
My layout is it correct??
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.google.android.gms.maps.MapFragment"/>
If you're seeing a grayed tile background where a map should be, you are likely using the wrong api key. You need a production key for a device that is different from the debug key for the map api.
i am unable to get the the front facing camera (camera id 1). open cam #1 failed appears on screen when i try to run the following code.
enclosed a snippet. any help will be appreciated (i am trying it on nexus 4).
Tester.java
package com.example.cam;
import java.util.HashMap;
import java.util.Iterator;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.Menu;
import android.widget.Toast;
public class Tester extends Activity {
private static final int[] camIds = { Camera.CameraInfo.CAMERA_FACING_BACK, Camera.CameraInfo.CAMERA_FACING_FRONT };
#SuppressLint("UseSparseArrays")
private final HashMap<Integer, Camera> camMap = new HashMap<Integer, Camera>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
#Override
protected void onResume() {
super.onResume();
if (!checkCameraHardware())
finish();
getCameras();
releaseCamera();
}
#Override
protected void onPause() {
super.onPause();
releaseCamera();
}
#Override
protected void onStop() {
super.onStop();
releaseCamera();
}
#Override
protected void onDestroy() {
super.onDestroy();
releaseCamera();
}
private final void doToast(final String message) {
Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
}
private final void getCameras() {
for (int camId : camIds)
try {
camMap.put(camId, Camera.open(camId));
doToast("open cam #" + camId + " succeeded");
} catch (Exception e) {
doToast("open cam #" + camId + " failed");
}
}
private final void releaseCamera() {
final Iterator<Integer> iter = camMap.keySet().iterator();
while (iter.hasNext())
camMap.remove(iter.next()).release();
}
private final boolean checkCameraHardware() {
if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA))
return camIds.length <= Camera.getNumberOfCameras();
else
return false;
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.cam"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="19"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.CAPTURE_AUDIO_OUTPUT" />
<uses-permission android:name="android.permission.CAPTURE_SECURE_VIDEO_OUTPUT" />
<uses-permission android:name="android.permission.CAPTURE_VIDEO_OUTPUT" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-feature
android:name="android.hardware.camera"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.cam.Tester"
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>