Hi, I don't know what you did nor did I see the video, but try to do the
following things:
first, give an id to your button, let us call it *calender_button*.
The in the below example do it like this:
public class MainActivity extends AppCompatActivity {
Button calender; *(<--- this is step 1)*
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//set the button, like *(<--- this is step 2)*
calender*= ** (Button) findViewById(R.id.**calender_button**);*
calender*.setOnClickListener(this); **(<--- this is step 3)*
}
public void onClick(View v) *(<--- step 4; I am using the case/scenario
here so as to allow you to add more buttons later on; it will also work with
just one button)*
{
if(v.getId())
{
case R.id.*calender_button*:
startActivity(new Intent(MainActivity.this,
*yourNextActivity*.class));
break;
}
}
}
Try this and let me know how it went
Τη Παρασκευή, 29 Ιανουαρίου 2016 - 9:07:38 μ.μ. UTC+2, ο χρήστης Michael
Maus έγραψε:
>
> I am just starting to learn Android Studio and am in now way a programmer.
>
> I have been following this tutorial to create a button to go to a new
> activity, but get an error when the button is pressed and the app crashed.
>
> *Tutorial I followed:*
> https://www.youtube.com/watch?v=-xljI2_TRZg
>
> *Error I see in Android Monitor log:*
> 01-29 14:05:23.867 2225-2225/com.xplore_scuba.xplorescuba I/art: Not
> late-enabling
> -Xcheck:jni (already on)
> 01-29 14:05:23.950 2225-2225/com.xplore_scuba.xplorescuba W/System:
> ClassLoader referenced unknown path:
> /data/app/com.xplore_scuba.xplorescuba-2/lib/x86
> 01-29 14:05:24.124 2225-2243/com.xplore_scuba.xplorescuba
> D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
> 01-29 14:05:24.174 2225-2243/com.xplore_scuba.xplorescuba
> I/OpenGLRenderer: Initialized EGL, version 1.4
> 01-29 14:05:24.264 2225-2243/com.xplore_scuba.xplorescuba W/EGL_emulation:
> eglSurfaceAttrib not implemented
> 01-29 14:05:24.264 2225-2243/com.xplore_scuba.xplorescuba
> W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xad7dfd60,
> error=EGL_SUCCESS
> 01-29 14:05:30.529 2225-2225/com.xplore_scuba.xplorescuba
> D/AndroidRuntime: Shutting down VM
> 01-29 14:05:30.530 2225-2225/com.xplore_scuba.xplorescuba
> E/AndroidRuntime: FATAL EXCEPTION: main
>
> Process: com.xplore_scuba.xplorescuba, PID: 2225
>
> java.lang.IllegalStateException: Could not find method ButtonClick(View)
> in a parent or ancestor Context for android:onClick attribute defined on
> view class android.support.v7.widget.AppCompatImageButton with id
> 'btn_calendar'
>
> at
> android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:307)
>
> at
> android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:266)
>
> at android.view.View.performClick(View.java:5198)
>
> at android.view.View$PerformClick.run(View.java:21147)
>
> at android.os.Handler.handleCallback(Handler.java:739)
>
> at android.os.Handler.dispatchMessage(Handler.java:95)
>
> at android.os.Looper.loop(Looper.java:148)
>
> at android.app.ActivityThread.main(ActivityThread.java:5417)
>
> at java.lang.reflect.Method.invoke(Native Method)
>
> at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
>
> at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
> 01-29 14:05:33.364 2225-2228/com.xplore_scuba.xplorescuba W/art:
> Suspending all threads took: 21.239ms
> 01-29 14:05:33.665 2225-2225/com.xplore_scuba.xplorescuba I/Process:
> Sending signal. PID: 2225 SIG: 9
>
>
>
> I have my files on GitHub if anyone would like to dig into it. Its a
> small project right now with a single button and two activities.
> https://github.com/mouse51180/NewActivityTest
>
>
> I dont know why the OnClick is having an issue and dont know what or where
> to look to correct this. My suspicions are that something needs to be
> changed or added to the MainActivity.java file.
>
> The button itself has the "onClick" parameter set to "onButtonClick". Im
> not sure is this might be were part of the problem is as well.
>
> *MainActivity.java file:*
>
> package com.xplore_scuba.xplorescuba;
>
> import android.content.Intent;
> import android.support.v7.app.AppCompatActivity;
> import android.os.Bundle;
> import android.view.Display;
> import android.view.View;
>
>
> public class MainActivity extends AppCompatActivity {
>
> @Override
> protected void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.activity_main);
> }
>
> public void onButtonClick(View v)
> {
> if(v.getId() == R.id.btn_calendar)
> {
> Intent i = new Intent(MainActivity.this, Display.class);
> startActivity(i);
> }
> }
> }
>
>
>
> Thanks in advance for any guidance you can provide.
>
>
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