在android中启动和停止TimerTask

时间：2016-08-18 06:24:39

标签： android android-viewpager timertask

我有一个动态的viewpager，可以显示图像，youtube视频和soundcloud音频。我添加了timertask来每3秒自动更改一次viewpager页面。我想在播放YouTube视频或播放声音云时播放视频时停止此自动更改，然后在播放停止时恢复播放。为此，我制作了两种方法starttime()和stoptime()。但是当我点击按钮在适配器内播放youtube视频（对于viewpager）时，我得到 RuntimeException 。

// Activity

public class Event_Details_Activity extends FragmentActivity implements RideRequestButtonCallback, GoogleApiClient.ConnectionCallbacks,
		GoogleApiClient.OnConnectionFailedListener, LocationListener, ResultCallback<LocationSettingsResult> {

	private static int currentPage = 0;
	private static int NUM_PAGES = 0;
	Handler myhandler;
	TimerTask timerTask;

	@Override
	protected void onPause() {
		super.onPause();
		try {
			pagerAdapter.displayYoutubeVideo.clearView();
			pagerAdapter.displayYoutubeVideo.freeMemory();
			pagerAdapter.displayYoutubeVideo.removeAllViews();
			pagerAdapter.displayYoutubeVideo.destroy();

			Class.forName("android.webkit.WebView")
					.getMethod("onPause", (Class[]) null)
					.invoke(pagerAdapter.displayYoutubeVideo, (Object[]) null);
			pagerAdapter.displayYoutubeVideo.onPause();

			if (handler!= null) {
				handler.removeCallbacks(runnable);
			}

			stoptime();

		}catch (Exception e){
			e.printStackTrace();
		}

	}

	@Override
	protected void onStop() {
		super.onStop();
		try {
			if(pagerAdapter.displayYoutubeVideo!=null){
				Class.forName("android.webkit.WebView")
						.getMethod("onPause", (Class[]) null)
						.invoke(pagerAdapter.displayYoutubeVideo, (Object[]) null);

			}


		} catch(ClassNotFoundException cnfe) {
			cnfe.printStackTrace();
		} catch(NoSuchMethodException nsme) {
			nsme.printStackTrace();
		} catch(InvocationTargetException ite) {
			ite.printStackTrace();
		} catch (IllegalAccessException iae) {
			iae.printStackTrace();
		}
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		if (pagerAdapter.mPlayer != null) {
			pagerAdapter.mPlayer.release();
			pagerAdapter.mPlayer = null;
		}
		try {
			//pagerAdapter.displayYoutubeVideo.onFinishTemporaryDetach();
		}catch (Exception e){
			e.printStackTrace();
		}


	}

	
	EventMoreDetails evDetails;
	
	
	static ViewPager myPager;
	
	ArrayList<ProdictDetailImageModel> algalary = new ArrayList<ProdictDetailImageModel>();
	
	static ProductDetailImagePagerAdapter pagerAdapter;
	
	LinearLayout llindicator;
	LinearLayout pbloaderll;

	ImageView ivrightarrow;
	ImageView ivleftarrow;
	TextView tvpagetext;

	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();

		starttime();

	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.event_details_activity);
		
		
		eventtitletv = (TextView) findViewById(R.id.eventtitletv);
		locationtv = (TextView) findViewById(R.id.locationtv);
		venuetv = (TextView) findViewById(R.id.venuetv);
		datetv = (TextView) findViewById(R.id.datetv);
		timetv = (TextView) findViewById(R.id.timetv);
		pricetv = (TextView) findViewById(R.id.pricetv);
		descriptiontv = (TextView) findViewById(R.id.descriptiontv);
		fbshareiv = (LinearLayout) findViewById(R.id.fbshareiv);
		twittershareiv = (ImageView) findViewById(R.id.twittershareiv);
		yahooshareiv = (ImageView) findViewById(R.id.yahooshareiv);
		nevigationll = (LinearLayout) findViewById(R.id.nevigationll);
		diariseiv = (LinearLayout)findViewById(R.id.diariseiv);
		birthdaydescriptiontv  = (TextView)findViewById(R.id.birthdaydescriptiontv);
		callpromterll = (Button) findViewById(R.id.btncallpromter);
		guestlistll = (Button) findViewById(R.id.btnguestlist);

		pbloaderll = (LinearLayout) findViewById(R.id.pbloaderll);
		
		myPager = (ViewPager) findViewById(R.id.pager);
		llindicator = (LinearLayout)findViewById(R.id.llindicator);
		
		tvpagetext = (TextView) findViewById(R.id.tvpagetext);

	
		
		bookticketbt = (Button) findViewById(R.id.bookticketbt);

		

		Event_Details_Activity_Static = this;

		sharell = (LinearLayout) findViewById(R.id.sharell);

		Bundle bundle = getIntent().getExtras();
		product_id = bundle.getString("product_id");

		pattern = Pattern.compile(EMAIL_PATTERN);


		
		menull = (LinearLayout) findViewById(R.id.menull);
	


		ImageView menubutton = (ImageView) findViewById(R.id.menubutton);
		ImageView chatAdminchiv = (ImageView) findViewById(R.id.chatAdminchiv);
		RideRequestButton blackButton = (RideRequestButton) findViewById(R.id.uber_button_white);
		chatAdminchiv.setVisibility(View.GONE);
		blackButton.setVisibility(View.GONE);
		menubutton.setVisibility(View.GONE);
		ImageView youtubebutton = (ImageView) findViewById(R.id.youtubechiv);
		youtubebutton.setVisibility(View.GONE);
		




		
		myPager.setOnPageChangeListener(new OnPageChangeListener() {

			@Override
			public void onPageSelected(int arg0) {
				
				tvpagetext.setText(arg0+1 +" of "+  pagerAdapter.getCount());

				
				MyPagerPosition = arg0;
				
			}

			@Override
			public void onPageScrolled(int arg0, float arg1, int arg2) {
				// TODO Auto-generated method stub

			}

			@Override
			public void onPageScrollStateChanged(int arg0) {
				// TODO Auto-generated method stub

			}
		});
		
		

		GeneralAsynctask gAsync = new GeneralAsynctask(
				Event_Details_Activity.this) {

			@Override
			protected void onPostExecute(Void result) {
				// TODO Auto-generated method stub
				super.onPostExecute(result);

				try {
					
					JSONArray resultArray = jObj.getJSONArray("EventsList");
					for (int i = 0; i < resultArray.length(); i++) {
						JSONObject jinnerObj = resultArray.getJSONObject(i);
						
						
						
						JSONArray galary = jinnerObj.getJSONArray("gallery");
						for (int j = 0; j < galary.length(); j++) {
							Log.d("IMAGE lINK",galary.getString(j));
							algalary.add(new ProdictDetailImageModel(galary.getString(j), ProdictDetailImageModel.TYPE_IMAGE));
						}
						
						//algalary.add(new ProdictDetailImageModel(jinnerObj.getString("video"), ProdictDetailImageModel.TYPE_VIDEO));
						//algalary.add(new ProdictDetailImageModel("http://img.youtube.com/vi/"+jinnerObj.getString("video")+"/0.jpg", ProdictDetailImageModel.TYPE_VIDEO));

						if(!jinnerObj.getString("video").isEmpty() && jinnerObj.getString("video")!=null){;

							algalary.add(new ProdictDetailImageModel(jinnerObj.getString("video"), ProdictDetailImageModel.TYPE_VIDEO));
						}

						if(!jinnerObj.getString("soundcloud").isEmpty() && jinnerObj.getString("soundcloud")!=null){

							ProdictDetailImageModel audio = new ProdictDetailImageModel(jinnerObj.getString("soundcloud_image"), ProdictDetailImageModel.TYPE_AUDUIO);
							audio.audio = jinnerObj.getString("soundcloud");

							algalary.add(audio);

						}





						if(algalary.size()>0){
						    pagerAdapter = new ProductDetailImagePagerAdapter(Event_Details_Activity.this, algalary, pbloaderll);
							myPager.setAdapter(pagerAdapter);
		                    myPager.setCurrentItem(0);
							tvpagetext.setText(1 + " of " + pagerAdapter.getCount());
							
		                    starttime();
						}
						
						Log.d("imagelength", algalary.size() +"");
						
						registerReceiver(pushreceiver, new IntentFilter("com.sam"));
		
	} // End of onCreate

	public void starttime(){

		Timer swipeTimer = new Timer();

		NUM_PAGES = algalary.size();

		handler = new Handler();
		final Runnable Update = new Runnable() {
			public void run() {
				if (currentPage == NUM_PAGES) {
					currentPage = 0;
				}
				myPager.setCurrentItem(currentPage++, true);
			}
		};


		timerTask = new TimerTask() {
			@Override
			public void run() {
				handler.post(Update);
			}
		};


		swipeTimer.schedule(timerTask, 3000, 3000);

	}

	public void stoptime(){
		if(timerTask!=null){
			timerTask.cancel();
		}
	}
	
	private BroadcastReceiver pushreceiver = new BroadcastReceiver() {

		@Override
		public void onReceive(Context context, Intent intent) {
			Bundle extras = intent.getExtras();
			if (extras != null) {
				String state = extras.getString("message");
				System.out.println("STATE"+" "+state);
				if(state.equals("start")){
					starttime();
				}else if(state.equals("stop")){
					stoptime();
				}
			}
		}
	};

	
	
	static int MyPagerPosition=0;
	public static Handler handler = new Handler();
	public static Runnable runnable = new Runnable() {
	    public void run() {
	            if( MyPagerPosition >= pagerAdapter.getCount()-1){
	                MyPagerPosition = 0;
	            }else{
	                MyPagerPosition = MyPagerPosition+1;
	            }
	            myPager.setCurrentItem(MyPagerPosition, true);
	            handler.postDelayed(runnable, 10000);
	    }
	};
	
	


}
// ViewPager Adapter

public class ProductDetailImagePagerAdapter extends PagerAdapter{
	private Activity activity;
	
	private LayoutInflater mInflater,mLayoutInflater;

	private ArrayList<ProdictDetailImageModel> ICONS;
	
	public static final String DEVELOPER_KEY = "AIzaSyDA3eXyi3tXfHkhiNSyFm11mp4s9f9nhnk";
	
	public static  String YOUTUBE_VIDEO_CODE = "v99W1n9BSlc";
	
	private static final int RECOVERY_DIALOG_REQUEST = 1;

	public static MediaPlayer mPlayer;

	public boolean isplayung = false;

	public boolean ispaused = false;

	AsyncTask<Void, Void, Void> prepareMusicAsync;

	LinearLayout pbloaderll;

	ProgressDialog pdcms;

	String stream_url;

	public WebView displayYoutubeVideo;

	 public ImageView ivaudio;

	public ProductDetailImagePagerAdapter(Activity activity, ArrayList<ProdictDetailImageModel> ICONS, LinearLayout pbloaderll) {
		this.activity = activity;
		this.ICONS = ICONS;
		mInflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		this.pbloaderll = pbloaderll;
		
	}

	@Override
	public int getCount() {
		return ICONS.size();
	}

	@Override
	public Object instantiateItem(View container, final int position) {




		
		View view = null;
		if(ICONS.get(position).type.equals(ProdictDetailImageModel.TYPE_IMAGE)){
			
			view = mInflater.inflate(R.layout.product_detail_image_row, null);

			ImageView ivimage = (ImageView)view.findViewById(R.id.ivimage);

			

			String eventImageLink = ICONS.get(position).image;
		
			if (!eventImageLink.equals("")) {		         
		         try {
	        	   String apiLink = eventImageLink;
	        	   
			       
			       String encodedurl = "";
			       encodedurl = apiLink.substring(0,apiLink.lastIndexOf('/'))+ "/"+ Uri.encode(apiLink.substring(
			       apiLink.lastIndexOf('/') + 1));
	 			   Log.d("IMAGE LINK", "encodedurl:"+encodedurl);
					if (!apiLink.equals("") && apiLink != null) {
					    Picasso.with(activity)
					   .load(encodedurl) 
					   .placeholder(R.drawable.listviewbg)

					   .error(R.drawable.listviewbg)
					   .into(ivimage); 
					}
				 } catch (Exception e) {
					e.printStackTrace();
				 }
			 }
		}else if(ICONS.get(position).type.equals(ProdictDetailImageModel.TYPE_VIDEO)){
			
			
			
			
			view = mInflater.inflate(R.layout.product_detail_video_image_row, null);
			
			ImageView ivimage = (ImageView)view.findViewById(R.id.ivimage);
			ImageView play = (ImageView)view.findViewById(R.id.play);

			

			String eventImageLink = "http://img.youtube.com/vi/"+ICONS.get(position).image+"/0.jpg";
			
			if (!eventImageLink.equals("")) {		         
		         try {
	        	   String apiLink = eventImageLink;
	        	   
			     
			       String encodedurl = "";
			       encodedurl = apiLink.substring(0,apiLink.lastIndexOf('/'))+ "/"+ Uri.encode(apiLink.substring(
			       apiLink.lastIndexOf('/') + 1));
	 			   Log.d("IMAGE LINK", "encodedurl:"+encodedurl);
					if (!apiLink.equals("") && apiLink != null) {
					    Picasso.with(activity)
					   .load(encodedurl) // load: This path may be a remote URL,				  
					   .placeholder(R.drawable.listviewbg)

					   .error(R.drawable.listviewbg)
					   .into(ivimage); 
					}
				 } catch (Exception e) {
					e.printStackTrace();
				 }
			 }

			play.setOnClickListener(new OnClickListener() {
				
				@Override
				public void onClick(View v) {
				
					Intent i = new Intent(activity, YoutubePlayerActivity.class);
					i.putExtra("youtubeid", YOUTUBE_VIDEO_CODE);
					activity.startActivity(i);


				}
			});
			
			YOUTUBE_VIDEO_CODE = ICONS.get(position).image;
			
		}else{
			view = mInflater.inflate(R.layout.product_detail_audio_image_row, null);

			ImageView ivimage = (ImageView)view.findViewById(R.id.ivimage);
			ivaudio = (ImageView)view.findViewById(R.id.ivaudio);

			

			String eventImageLink = ICONS.get(position).image;
		  
			if (!eventImageLink.equals("")) {
				try {
					String apiLink = eventImageLink;

				
					String encodedurl = "";
					encodedurl = apiLink.substring(0,apiLink.lastIndexOf('/'))+ "/"+ Uri.encode(apiLink.substring(
							apiLink.lastIndexOf('/') + 1));
					Log.d("IMAGE LINK", "encodedurl:"+encodedurl);
					if (!apiLink.equals("") && apiLink != null) {
						Picasso.with(activity)
								.load(encodedurl) 
								.placeholder(R.drawable.listviewbg)

								.error(R.drawable.listviewbg)
								.into(ivimage); 
					}
				} catch (Exception e) {
					e.printStackTrace();
				}
			}

			ivaudio.setOnClickListener(new OnClickListener() {

				@Override
				public void onClick(View v) {
					
					try {
						if (Event_Details_Activity.handler!= null) {
							Event_Details_Activity.handler.removeCallbacks(Event_Details_Activity.runnable);
						}
					}catch (Exception e){
						e.printStackTrace();
					}
					Log.v("IS PLAYING  >", isplayung +"");

					if(!isplayung) {


						
						stream_url = replaceString(ICONS.get(position).audio);

						Log.e("stream_url","***"+stream_url);
						mPlayer = new MediaPlayer();
						mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
						try {

							Log.v("Stream Url  >", stream_url + "?client_id=fd557f1b3b255669587932f72b65f562");
							mPlayer.setDataSource(stream_url + "?client_id=fd557f1b3b255669587932f72b65f562");
						} catch (IllegalArgumentException e) {
							Toast.makeText(activity, "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
						} catch (SecurityException e) {
							Toast.makeText(activity, "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
						} catch (IllegalStateException e) {
							Toast.makeText(activity, "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
						} catch (IOException e) {
							e.printStackTrace();
						}
						commentpostActivity(pbloaderll);

						isplayung = true;
						ivaudio.setImageResource(R.drawable.audio_pause);
					}else{
						if(mPlayer!=null && mPlayer.isPlaying() && !ispaused){
							mPlayer.pause();
							ispaused = true;
							ivaudio.setImageResource(R.drawable.audio_play);

						}else if(mPlayer!=null && ispaused){
							mPlayer.start();
							ispaused = false;
							ivaudio.setImageResource(R.drawable.audio_pause);
						}
						

					}




				}
			});
		}
		

		

		
	

		
	
				((ViewPager) container).addView(view, 0);

		

		return view;
	}

	
	@Override
	public float getPageWidth(int position) {
		return(1f);
	}



	@Override
	public void destroyItem(View  arg0, int arg1, Object arg2) {
		((ViewPager) arg0).removeView((View) arg2);
		
	}

	@Override
	public boolean isViewFromObject(View arg0, Object arg1) {
		return arg0 == ((View) arg1);
	}

	@Override
	public Parcelable saveState() {
		return null;
	}

	private static class ViewHolder {  
		RelativeLayout linearLayout;
		ImageView cover;
		TextView title;
		TextView pricetv;
		TextView destaince;;
	}

	public String replaceString(String rtstr) {

		rtstr = rtstr.replace("[", "");
		rtstr = rtstr.replace("{", "");
		rtstr = rtstr.replace("}", "");
		rtstr = rtstr.replace("\"", "");
		rtstr = rtstr.replace("\\/", "/");
		rtstr = rtstr.replace("]", "");
		rtstr = rtstr.replace(" ", "%20");

		return rtstr;

	}
	void commentpostActivity(final LinearLayout pbloaderll){

		prepareMusicAsync = new AsyncTask<Void, Void, Void>( ){

			@Override
			protected void onPreExecute() {
				
				super.onPreExecute();
				

			}

			@Override
			protected Void doInBackground(Void... params) {
			

				try {
					mPlayer.prepare();


				} catch (IllegalStateException e) {
					Toast.makeText(activity, "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
				} catch (IOException e) {
					Toast.makeText(activity, "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
				}

				return null;
			}

			@Override
			protected void onPostExecute(Void result) {
			
				super.onPostExecute(result);
				mPlayer.start();
				pbloaderll.setVisibility(View.GONE);
			}

		};

		prepareMusicAsync.execute( );

	}
	Dialog youtubevideodialog; 
    private void showWaitingnooftickitsDialog() {
        try {
            youtubevideodialog = new Dialog(activity);
           
            youtubevideodialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
            youtubevideodialog.setContentView(R.layout.product_detail_video_row);
            youtubevideodialog.setCancelable(true);

            youtubevideodialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
           

			YouTubePlayerView youTubeView = (YouTubePlayerView)youtubevideodialog.findViewById(R.id.youtubeplayer);

		


            youtubevideodialog.show();



        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}
// LOGCAT

FATAL EXCEPTION: main
Process: com.nits.londonclubnights, PID: 11899
java.lang.RuntimeException: Unable to resume activity {com.nits.londonclubnights/com.nits.londonclubnights.YoutubePlayerActivity}: java.lang.ClassCastException: com.nits.application.AppApplication cannot be cast to com.nits.londonclubnights.Event_Details_Activity
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3028)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3063)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2418)
at android.app.ActivityThread.access$800(ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
Caused by: java.lang.ClassCastException: com.nits.application.AppApplication cannot be cast to com.nits.londonclubnights.Event_Details_Activity
at com.nits.londonclubnights.YoutubePlayerActivity.onResume(YoutubePlayerActivity.java:110)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1280)
at android.app.Activity.performResume(Activity.java:6096)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3011)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3063) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2418) 
at android.app.ActivityThread.access$800(ActivityThread.java:155) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:135) 
at android.app.ActivityThread.main(ActivityThread.java:5343) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372)

// YoutubeBaseActivity

public class YoutubePlayerActivity extends YouTubeBaseActivity implements YouTubePlayer.OnInitializedListener{

public static final String DEVELOPER_KEY = "AIzaSyDA3eXyi3tXfHkhiNSyFm11mp4s9f9nhnk";
	
	// YouTube video id
	public static  String YOUTUBE_VIDEO_CODE = "v99W1n9BSlc";
	
	private static final int RECOVERY_DIALOG_REQUEST = 1;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_youtube_player);
		this.setFinishOnTouchOutside(true);
		
		YouTubePlayerView youTubeView = (YouTubePlayerView)findViewById(R.id.youtubeplayer);

		
		youTubeView.initialize(DEVELOPER_KEY, this);
		
		YOUTUBE_VIDEO_CODE = getIntent().getExtras().getString("youtubeid");
		Log.e("YOUTUBE_VIDEO_CODE",":"+YOUTUBE_VIDEO_CODE);

		try {

			if(Event_Details_Activity.pagerAdapter.mPlayer!=null && Event_Details_Activity.pagerAdapter.mPlayer.isPlaying() && !Event_Details_Activity.pagerAdapter.ispaused){
				Event_Details_Activity.pagerAdapter.mPlayer.pause();
				Event_Details_Activity.pagerAdapter.ispaused = true;
				Event_Details_Activity.pagerAdapter.ivaudio.setImageResource(R.drawable.audio_play);

			}
			
		}catch (Exception e){
			e.printStackTrace();
		}
	}

	

	@Override
	protected void onResume() {
		super.onResume();

		Intent intent1 = new Intent("com.sam");
		intent1.putExtra("message", "stop");
		YoutubePlayerActivity.this.sendBroadcast(intent1);

	}

	@Override
	protected void onPause() {
		super.onPause();

		Intent intent2 = new Intent("com.sam");
		intent2.putExtra("message", "start");
		YoutubePlayerActivity.this.sendBroadcast(intent2);
	}
}

1 个答案:

答案 0 :(得分：0)

不要从其他活动中调用Event_Details_Activity类中的方法。 在BroadCastReciever和Event_Details_Activity方法调用onRecieve和starttime()方法中创建stoptime()。

因此，只要您希望从starttime()外部拨打stoptime()和Event_Details_Activity，就可以发送广播。

**还有很多其他方法可以做到这一点。您可以谷歌并选择最佳方式。

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