java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(int)' on a null object reference

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via Stack Overflow by Xenocide122
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Attempt to invoke virtual method 'void android.widget.TextView.setText(int)' on a null object reference
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Attempt to invoke virtual method 'int android.widget.ImageView.getId()' on a null object reference java.lang.RuntimeException: Unable to resume activity {org.radiomango.app/org.radiomango.app.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.widget.ImageView.getId()' on a null object reference
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Attempt to invoke virtual method 'android.bluetooth.BluetoothDevice android.bluetooth.BluetoothAdapter.getRemoteDevice(java.lang.String)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(int)' on a null object reference
at com.test.app.MainActivity.signInOutText(MainActivity.java:203)
at com.test.app.MainActivity.onResume(MainActivity.java:307)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1286)
at android.app.Activity.performResume(Activity.java:6987)

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