Problem in opening a new activity

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Sir, I have a problem in opening a new activity on clicking the button. I need my program to open a new activity when my button is pressed.Here is what I have done:

In xml I have created a button

XML

<Button
        android:layout_width="500dp"
        android:layout_height="50dp"
        android:text="testButton"
        android:id="@+id/button"
        android:layout_below="@+id/imageView"
        android:layout_centerHorizontal="true"
        android:background="@android:color/holo_red_light" />

I have created a new empty activity named "ship".

In my main .java

Java

final Button btn = (Button) findViewById(R.id.button);
      btn.setOnClickListener(new View.OnClickListener() {

                                 @Override
                                 public void onClick(View v) {
                                     Intent intent = new Intent(this, ship.class);
                                     startActivity(intent);

                                 }
                             }
      );

And I have added the manifest file

XML

</activity>
       <activity android:name=".ship" >
       </activity>

And my program shows error.
[update]
This is my error message

Quote:
Error:(20, 56) error: no suitable constructor found for Intent(<anonymous onclicklistener="">,Class<ships>)
constructor Intent.Intent(String,Uri) is not applicable
(argument mismatch; <anonymous onclicklistener=""> cannot be converted to String)
constructor Intent.Intent(Context,Class(argument mismatch; <anonymous onclicklistener=""> cannot be converted to Context)

Have I missed anything?

Kindly help me.

Posted 18-Dec-15 5:15am

VISWESWARAN1998

Updated 18-Dec-15 5:32am

v2

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Comments

phil.o 18-Dec-15 11:28am

"Have I missed anything?"
Yes, you did not describe the error itself :)
This is not your first question here, and you should have learnt how to ask a good question for now. Please have a look at the FAQ.

[no name] 20-Dec-15 1:50am

I am really sorry Sir. I have updated my question.Thank you.

[no name] 23-Dec-15 12:55pm

Sir, I have tried to solve my question many times but I cannot spot out my mistakes. Can you please help me with this?

I have encountered the same error for all my try.

phil.o 24-Dec-15 4:10am

I don't do Android development, so I am not going to answer on something which is obscure to me.
Error messages seem to point to a constructor used with a parameter that cannot be converted to string. You have to debug your application and investigate why you get this exception. I cannot do that for you.
You should google for "android debugging" and start from there. Good work :)

[no name] 25-Dec-15 22:13pm

Thank you for your kind suggestion Sir. :)

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wseng · Accepted Answer · 2015-12-25T03:07:00

Solution 1

This work for me

Main.java

Java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


    final Button btn = (Button) findViewById(R.id.button);
    btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent intent = new Intent(Main.this, ship.class); // change this line and you will good to go
            startActivity(intent);

        }
    });
}

Ship.java

Java

public class ship extends AppCompatActivity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ship);

    }
}

Posted 25-Dec-15 3:07am

wseng

Updated 25-Dec-15 22:24pm

v4

Comments

[no name] 25-Dec-15 22:11pm

Sir, this was the same solution suggested by my debugger.But it is not working.I have created the "ship" class and I did not modify anything.Can you please explain me that with what code should I update my question.Thank you.

wseng 26-Dec-15 0:08am

post full code here and remove the final. After used the code suggested by debugger, what error you get?

[no name] 26-Dec-15 4:00am

This is my "ship" class

public class ship extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ship);

}
}

and I get the same error on using the code suggested by the debugger.

My error message occurs in this line

Intent intent = new Intent(this, ships.class);

Thank you.

wseng 26-Dec-15 4:22am

My error message occurs in this line
Intent intent = new Intent(this, ships.class);

Why you still using Intent intent = new Intent(this, ships.class); ??? Check my answer now

[no name] 26-Dec-15 5:56am

Thank you for your kind help sir but now my generated ".apk" fails to open the new window by popping up "Unfortunately pictures has stopped"
pictures = my application name

Contents in the main activity opens successfully and the build is successful.What should I do now?

Thank you once again.

wseng 26-Dec-15 6:03am

Post it as another question . Thanks

[no name] 26-Dec-15 6:18am

I fear that most of the answers will be like this "Re-post" , " Learn debugging" so why I ask this in this question itself.
Thank you.

wseng 26-Dec-15 6:27am

I'm sure you get another logcat error right ? It simply mean that there are another problem in your code but your are not showing here.

[no name] 26-Dec-15 6:30am

No sir there is no error in my project and I have build-ed my project and my compiler shows "build successful"

wseng 26-Dec-15 6:33am

"Unfortunately pictures has stopped". It sounds like your app are crashed. Have you checked your logcat ?

[no name] 26-Dec-15 9:21am

Log seems to be okay sir.I have checked it.

wseng 27-Dec-15 2:40am

Your code seems ok to me

[no name] 27-Dec-15 2:45am

Sir, what should I do now?

wseng 27-Dec-15 5:12am

post the logcat error and all the code you have to another question. I can't really figure out what's caused your app crashed by looking this few line code. You have to post more code.

[no name] 27-Dec-15 5:15am

I have posted almost all of my code and there is no error in.

wseng 27-Dec-15 5:17am

I want see your main.java full code, not only the button code. :)

[no name] 27-Dec-15 5:23am

package com.vis.pictures;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
public class pictures extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pictures);

final Button btn = (Button) findViewById(R.id.button);
btn.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
Intent intent = new Intent(pictures.this, ships.class); // change this line and you will good to go
startActivity(intent);

}
}
);
}}
This is my main code :)

wseng 27-Dec-15 5:27am

ok, post full code of ship here

[no name] 27-Dec-15 5:30am

package com.vis.pictures;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class ship extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ship);

}
}

wseng 27-Dec-15 5:31am

and both layout classes

[no name] 27-Dec-15 5:37am

Ship class:

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
="" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" android:paddingbottom="@dimen/activity_vertical_margin" tools:context="com.vis.pictures.ship" android:removed="@drawable/e">
<ImageView
android:layout_width="1000dp"
android:layout_height="100dp"
android:id="@+id/imageView2"
android:src="@drawable/f"
android:background="@android:color/holo_blue_light"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />

[no name] 27-Dec-15 5:39am

main :
<Button
android:layout_width="500dp"
android:layout_height="50dp"
android:text="scholarships"
android:id="@+id/button"
android:layout_below="@+id/imageView"
android:layout_centerHorizontal="true"
android:background="@android:color/holo_red_light" />

wseng 27-Dec-15 5:50am

Your code seems ok to me. When your app crashed, did it throws any red line in logCat?

[no name] 27-Dec-15 8:22am

No sir, Everything seems to be okay which makes me to be confused.

wseng 27-Dec-15 9:02am

You using emulator or real device to run?

[no name] 28-Dec-15 10:07am

I used my real device to run.

wseng 28-Dec-15 10:37am

try run using emulator. And check logCat.

[no name] 1-Jan-16 12:37pm

Sorry sir for a very late reply.I tried almost everything but still it doesn't work.

wseng 2-Jan-16 4:28am

Doesn't work mean ? Have you used emulator to run ?

[no name] 2-Jan-16 7:21am

Yes,but the app keeps crashing.Thank you

wseng 2-Jan-16 7:54am

check your logcat please...crashed without displaying logcat is impossible.

wseng 6-Jan-16 11:32am

have you solved ?

[no name] 6-Jan-16 11:52am

Sorry Sir, I have lost the hope that this will work.But for your kind comment I am trying once again now.

wseng 7-Jan-16 20:31pm

Sorry, I don't know how to solve :(

[no name] 8-Jan-16 8:16am

It's okay.Thank you for your help.

[no name] 9-Jan-16 1:44am

Sir, The answer may look silly but this worked I have deleted the previous application and created a fresh project and everything works fine.
It must be a very small bug which I could not find.

Thank you sir for your kind help and I feel sorry for disturbing you because of my fault

[no name] 6-Jan-16 13:55pm

Information:Gradle tasks [clean, :app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:compileDebugSources, :app:compileDebugAndroidTestSources]
:clean
:app:clean
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72310Library
:app:prepareComAndroidSupportSupportV42310Library
:app:prepareDebugDependencies
:app:compileDebugAidl
:app:compileDebugRenderscript
:app:generateDebugBuildConfig
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources
:app:mergeDebugResources
:app:processDebugManifest
:app:processDebugResources
:app:generateDebugSources
:app:preDebugAndroidTestBuild UP-TO-DATE
:app:prepareDebugAndroidTestDependencies
:app:compileDebugAndroidTestAidl
:app:processDebugAndroidTestManifest
:app:compileDebugAndroidTestRenderscript
:app:generateDebugAndroidTestBuildConfig
:app:generateDebugAndroidTestAssets UP-TO-DATE
:app:mergeDebugAndroidTestAssets
:app:generateDebugAndroidTestResValues UP-TO-DATE
:app:generateDebugAndroidTestResources
:app:mergeDebugAndroidTestResources
:app:processDebugAndroidTestResources
:app:generateDebugAndroidTestSources
:app:processDebugJavaRes UP-TO-DATE
:app:compileDebugJavaWithJavac
:app:compileDebugNdk UP-TO-DATE
:app:compileDebugSources
:app:processDebugAndroidTestJavaRes UP-TO-DATE
:app:compileDebugAndroidTestJavaWithJavac
:app:compileDebugAndroidTestNdk UP-TO-DATE
:app:compileDebugAndroidTestSources
Information:BUILD SUCCESSFUL
Information:Total time: 24.135 secs
Information:0 errors
Information:0 warnings
Information:See complete output in console

My program has 0 errors and zero warnings!

wseng 9-Jan-16 7:22am

Glad you fix it sir. Please mark my answer since it solved your first issue :)

[no name] 9-Jan-16 11:59am

Sir, I have already marked your question as solved before my previous comment.

To my knowledge there will be no notification when someone accepts your answer but you can see your reputation points get increased! :-)
Thank you for your kind help sir

wseng 10-Jan-16 9:11am

Thanks for you too. All the best :)

[no name] 10-Jan-16 9:46am

Sir, It is my duty to accept a perfect answer :-)

wseng 10-Jan-16 9:52am

thanks sir

[no name] 10-Jan-16 10:00am

You are very welcome sir!