You can launch an Activity through broadcast receiver. that can change the textview colour..
On Sun, Jan 15, 2017 at 4:02 AM, abdullah zaman < [email protected]> wrote: > How can I use findViewById() in a Broadcast Receiver class. Below is my > code snippet. I get the error message: "can't resolve method findViewById" > if used directly without class constructor (because find View by Id is > Activity method and cant be used in Broadcast Receiver i suppose) . And if > i try to use the class constructor (Where the imageView is available in my > main activity) my app crashes saying " Unfortunately app has stopped" . > > I just want to change the color of ImageView e.g "from black to blue" in > the below if statement if it is possible by any other means pleas let me > know. > > This is my Broadcast Receiver class > > public class MyBroadcastReceiver extends FirstBroadcastReceiver { > Context context;Activity activity;public MyBroadcastReceiver(Context context, > Activity activity){ > this.context=context; > this.activity=activity;} > > @Override > protected void (Context context) { > // content > } > > @Override > public void onButton(Context context, boolean isClick) { > > if(isClick) { > > ImageView blueImage = (ImageView) activity.findViewById(R.id.imageView); > blueImage.setColorFilter(0xff000000); > } > }........... > // and so on > > And this is my Main Activity > > public class MainActivity extends AppCompatActivity { > @Overrideprotected void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.activity_main); > // and so on > }} > > MyBroadcastReceiver myBroadcastReceiver = new > MyBroadcastReceiver(MainActivity.this,this); > > @Override > public void onActivityResult() { > // some code > } > @Override > public void onInitialized(MyManager manager){ > // some code > } > > > -- > You received this message because you are subscribed to the Google Groups > "Android Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/android-developers. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/android-developers/31c0874e-3c84-4f1a-b17d- > 85cde28741ec%40googlegroups.com > <https://groups.google.com/d/msgid/android-developers/31c0874e-3c84-4f1a-b17d-85cde28741ec%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/CABHzXAS_bVowxdvomLrnL3aJTyYutyFHGRVXnL_RCbh0bBvcVQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
