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 <
engr.abdullahza...@gmail.com> 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
> }
>
>
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