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Editorial Team
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Asked: 2026-06-03T22:38:01+00:00

I am facing this problem that buttons in android are not clickable when given

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I am facing this problem that buttons in android are not clickable when given a background. So, I used ImageButton.
In the Java file how are ImageButtons declared?
I have a red otification badge in a textview which I wanted to place on the top right corner of the ImageButton. But the textView is not visible over the button i.e it gets half hidden behind the button. What is the solution for this?

Another problem is that my project faces a force close problem. The log cat shows:

05-11 04:13:29.508: D/(3913): after defining intent

05-11 04:13:29.678: D/AndroidRuntime(3913): Shutting down VM

05-11 04:13:29.678: W/dalvikvm(3913): threadid=1: thread exiting with uncaught exception (group=0x4001d800)

05-11 04:13:29.688: E/AndroidRuntime(3913): FATAL EXCEPTION: main

05-11 04:13:29.688: E/AndroidRuntime(3913): java.lang.RuntimeException: Unable to start activity ComponentInfo
{phone.activities/phone.activities.leave}: java.lang.NullPointerException

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.os.Handler.dispatchMessage(Handler.java:99)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.os.Looper.loop(Looper.java:123)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.app.ActivityThread.main(ActivityThread.java:4627)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at java.lang.reflect.Method.invokeNative(Native Method)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at java.lang.reflect.Method.invoke(Method.java:521)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at dalvik.system.NativeStart.main(Native Method)

05-11 04:13:29.688: E/AndroidRuntime(3913): Caused by: java.lang.NullPointerException

05-11 04:13:29.688: E/AndroidRuntime(3913):     at phone.activities.leave.onCreate(leave.java:33)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

05-11 04:13:29.688: E/AndroidRuntime(3913):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)

05-11 04:13:29.688: E/AndroidRuntime(3913):     ... 11 more

What is the reason for force close?

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="right"
android:orientation="vertical" android:clickable="true">

<LinearLayout
    android:id="@+id/linearLayout1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="center"
        android:paddingLeft="90dp"
        android:paddingRight="58dp"
        android:text="eApproval"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="22dp"
        android:textStyle="bold"
        android:typeface="sans" />
</LinearLayout>


<TableLayout
    android:id="@+id/tableLeft"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="left"
    android:paddingLeft="20dp"
    android:paddingRight="30dp"
    android:paddingTop="25dp" >



    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent">
<RelativeLayout android:layout_marginLeft="10dp">


    <Button
        android:id="@+id/buttonLeave"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginBottom="5dp"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="10dp"
        android:clickable="true"
      />


 <TextView
 android:id="@+id/textOne"
 android:layout_width="30dp"
 android:layout_height="30dp"
 android:layout_marginLeft="70dp"
 android:background="@drawable/picture1"
 android:gravity="center"
 android:text="5"
 android:textColor="#FFF"
 android:textSize="14dp"
 android:textStyle="bold"
 android:typeface="sans" />

</RelativeLayout>       
<RelativeLayout android:paddingLeft="20dp" android:layout_marginLeft="10dp">
<Button
        android:id="@+id/buttonTime"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginBottom="5dp"
        android:layout_marginLeft="25dp"
        android:clickable="true"

        android:height="60dp"
        android:width="30dp" 
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" android:layout_marginTop="10dp" />


<TextView
android:id="@+id/textTwo"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="80dp"
android:background="@drawable/picture1"
android:gravity="center"
android:text="4"
android:textColor="#FFF"
android:textSize="14dp"
android:textStyle="bold"
android:typeface="sans" />

</RelativeLayout>

    </TableRow>
    <TableRow >
        <TextView
            android:id="@+id/textLeave"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Leave Requests"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textSize="15dp"
            android:textStyle="normal|bold"
            android:typeface="sans"
            android:width="90dp" android:layout_marginLeft="20dp"
android:padding="5dp"
android:gravity="center"/>

         <TextView
            android:id="@+id/textTime"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Time Booking"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textSize="15dp"
            android:textStyle="bold"
            android:typeface="sans"
            android:width="90dp" android:layout_marginLeft="50dp" android:padding="5dp" 
android:gravity="center"/>
   </TableRow>

    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
<RelativeLayout android:layout_marginLeft="10dp">

    <Button
        android:id="@+id/buttonCart"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginBottom="5dp"
        android:layout_marginLeft="20dp"

        android:height="60dp"
        android:width="30dp" 
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" android:layout_marginTop="10dp" 
android:clickable="true"/>


 <TextView
 android:id="@+id/textThree"
 android:layout_width="30dp"
 android:layout_height="30dp"
 android:layout_marginLeft="70dp"
 android:background="@drawable/picture1"
 android:gravity="center"
 android:text="2"
 android:textColor="#FFF"
 android:textSize="14dp"
 android:textStyle="bold"
 android:typeface="sans" />

</RelativeLayout>       
<RelativeLayout android:paddingLeft="20dp" android:layout_marginLeft="10dp">
<Button
        android:id="@+id/buttonInvoice"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginBottom="5dp"
        android:layout_marginLeft="25dp"

        android:height="60dp"
        android:width="30dp" 
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" android:layout_marginTop="10dp" 
android:clickable="true"/>


<TextView
android:id="@+id/textFour"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="80dp"
android:background="@drawable/picture1"
android:gravity="center"
android:text="3"
android:textColor="#FFF"
android:textSize="14dp"
android:textStyle="bold"
android:typeface="sans" />

</RelativeLayout>

    </TableRow>
      <TableRow >
        <TextView
            android:id="@+id/textCart"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:clickable="false"
            android:text="Shopping Cart"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textSize="15dp"
            android:textStyle="bold"
            android:typeface="sans"
            android:width="90dp" android:layout_marginLeft="20dp" android:padding="5dp" 
android:gravity="center"/>

         <TextView
            android:id="@+id/textInvoice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:clickable="false"
            android:text="Invoice"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textSize="15dp"
            android:textStyle="bold"
            android:typeface="sans"
            android:width="90dp" android:layout_marginLeft="50dp" android:padding="5dp" 
android:gravity="center"/>
   </TableRow>


    <TableRow
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
<RelativeLayout android:layout_marginLeft="10dp">

    <Button
        android:id="@+id/buttonPurchase"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginBottom="5dp"
        android:layout_marginLeft="20dp"

        android:height="60dp"
        android:width="30dp" 
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" android:layout_marginTop="10dp" 
android:clickable="true"/>


 <TextView
 android:id="@+id/textFive"
 android:layout_width="30dp"
 android:layout_height="30dp"
 android:layout_marginLeft="70dp"
 android:background="@drawable/picture1"
 android:gravity="center"
 android:text="4"
 android:textColor="#FFF"
 android:textSize="14dp"
 android:textStyle="bold"
 android:typeface="sans" />

</RelativeLayout>

<RelativeLayout android:paddingLeft="20dp" android:layout_marginLeft="10dp">

<Button
    android:id="@+id/buttonTravel"
    android:layout_width="70dp"
    android:layout_height="70dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginBottom="5dp"
    android:layout_marginLeft="25dp"
    android:layout_marginTop="10dp"

    android:clickable="true"
    android:height="60dp"
    android:width="30dp" />


<TextView
    android:id="@+id/textSix"
    android:layout_width="30dp"
    android:layout_height="30dp"
    android:layout_marginLeft="80dp"
    android:background="@drawable/picture1"
    android:gravity="center"
    android:text="7"
    android:textColor="#FFF"
    android:textSize="14dp"
    android:textStyle="bold"
    android:typeface="sans" />

</RelativeLayout>

    </TableRow>


    <TableRow >
        <TextView
            android:id="@+id/textPurchase"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:clickable="false"
            android:text="Purchase Order"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textSize="15dp"
            android:textStyle="bold"
            android:typeface="sans"
            android:width="90dp" android:layout_marginLeft="20dp" android:padding="5dp" 
android:gravity="center"/>

         <TextView
            android:id="@+id/textTravel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:clickable="false"
            android:text="Travel Approval"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textSize="15dp"
            android:textStyle="bold"
            android:typeface="sans"
            android:width="90dp" android:layout_marginLeft="50dp" android:padding="5dp"
android:gravity="center"/>
   </TableRow>
</TableLayout>

</LinearLayout>

The onCreate method is :
package phone.activities;

import phone.activities.R;
import phone.activities.R.id;
import phone.activities.R.layout;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class EApprovalActivity extends Activity implements OnClickListener {
private static final String TAG = null;


/** Called when the activity is first created. */
@Override

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


    Button leaveButton;
    leaveButton = (Button)findViewById(R.id.buttonLeave);
    leaveButton.setOnClickListener(this);

    Button timeButton;
    timeButton = (Button)findViewById(R.id.buttonTime);
    timeButton.setOnClickListener(this);

    Button cartButton;
    cartButton = (Button)findViewById(R.id.buttonCart);
    cartButton.setOnClickListener(this);

    Button invoiceButton;
    invoiceButton = (Button)findViewById(R.id.buttonInvoice);
    invoiceButton.setOnClickListener(this);

    Button purchaseButton;
    purchaseButton = (Button)findViewById(R.id.buttonPurchase);
    purchaseButton.setOnClickListener(this);

    Button travelButton;
    travelButton = (Button)findViewById(R.id.buttonTravel);
    travelButton.setOnClickListener(this);

}


public void onClick(View v) {
    ComponentName cn;
    switch(v.getId())
    {
    case R.id.buttonLeave:
        Intent leaveIntent = new Intent(EApprovalActivity.this,
leave.class); 
        startActivity(leaveIntent);                 
        break;

    case R.id.buttonTime:
        Intent timeIntent = new Intent(EApprovalActivity.this,
time.class); 
        startActivity(timeIntent);                  
        break;

    case R.id.buttonCart:
        Intent cartIntent = new Intent(EApprovalActivity.this, 
cart.class); 
        startActivity(cartIntent);                  
        break;

    case R.id.buttonInvoice:
        Intent invoiceIntent = new Intent(EApprovalActivity.this, 
invoice.class); 
        startActivity(invoiceIntent);                   
        break;

    case R.id.buttonPurchase:
        Intent purchaseIntent = new Intent(EApprovalActivity.this, 
purchase.class); 
        startActivity(purchaseIntent);                  
        break;

    case R.id.buttonTravel:
        Intent travelIntent = new Intent(EApprovalActivity.this, 
travel.class); 
        startActivity(travelIntent);                    
        break;


    } Log.d(TAG,"after defining intent");
    }
}
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1 Answer

  1. Editorial Team

    In the Java file how are ImageButtons declared?

    ImageButton ib = findByViewId(R.id.yourImageButtonId);

    the textView is not visible over the button i.e it gets half hidden
    behind the button. What is the solution for this?

    You can set Text to a button no need to put a textview over it.

    Also you can give a simple button a android:drawableOnTop attribute,
    the given recource appears on top.

    To your other problem:

    Check line 33 in your onCreate() method. Post it if you cant find the NullPointer on your own.

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