showing error while running the app - android-studio

Question

The Error is as below:
02-11 13:24:31.561 5262-5262/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.vicky.project, PID: 5262
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.example.vicky.project/com.example.vicky.project.MainActivity}:
java.lang.ClassCastException:
android.support.v7.widget.AppCompatTextView cannot be cast to
android.widget.EditText
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Caused by: java.lang.ClassCastException:
android.support.v7.widget.AppCompatTextView cannot be cast to
android.widget.EditText
at com.example.vicky.project.MainActivity.onCreate(MainActivity.java:30)
at android.app.Activity.performCreate(Activity.java:6662)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6077) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Answer 1

Look at this carefully
{android.support.v7.widget.AppCompatTextView cannot be cast to android.widget.EditText at com.example.vicky.project.MainActivity.onCreate(MainActivity.java:30) }
You may did this
{TextView tv = (EditText/*change this to TextView*/) findViewById (R.id.textView)}
If you are sure your code is correct then change ID of view in layout.xml then clean project from under the build options and rebuild it.

Answer 2

Class cast Exception because you're trying to cast TextView to EditText.