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POhow to use the if statement with radiobuttons
 

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  1. POhow to use the if statement with radiobuttons
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    <p>i would like to start a new activity according to the radiobutton that the user choose.this is my non working code(i m using a toast message for now instead of a new activity)</p> <pre><code>public class cafechoice extends Activity { /** Called when the activity is first created. */ public RadioButton rb1; public RadioButton rb2; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.cafechoice); final RadioButton rb1 = (RadioButton) findViewById(R.id.radio_red); final RadioButton rb2 = (RadioButton) findViewById(R.id.radio_blue); rb1.setOnClickListener(radio_listener); rb2.setOnClickListener(radio_listener); } OnClickListener radio_listener = new OnClickListener() { public void onClick(View v) { // Perform action on clicks if(v == radio_listener) { if(rb1.isChecked() == true){Toast.makeText(cafechoice.this, 1, Toast.LENGTH_SHORT).show();} if(rb2.isChecked() == true){Toast.makeText(cafechoice.this, 1, Toast.LENGTH_SHORT).show();} } } }; } </code></pre> <p>@rekaszeru this is my logcatview</p> <pre><code>05-02 17:16:28.206: WARN/dalvikvm(678): threadid=3: thread exiting with uncaught exception (group=0x4001b188) 05-02 17:16:28.216: ERROR/AndroidRuntime(678): Uncaught handler: thread main exiting due to uncaught exception 05-02 17:16:28.248: ERROR/AndroidRuntime(678): java.lang.RuntimeException: Unable to start activity ComponentInfo{kostas.menu.chania/kostas.menu.chania.cafechoice}: java.lang.NullPointerException 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2481) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2497) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1848) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.os.Handler.dispatchMessage(Handler.java:99) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.os.Looper.loop(Looper.java:123) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.app.ActivityThread.main(ActivityThread.java:4338) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at java.lang.reflect.Method.invokeNative(Native Method) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at java.lang.reflect.Method.invoke(Method.java:521) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at dalvik.system.NativeStart.main(Native Method) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): Caused by: java.lang.NullPointerException 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at kostas.menu.chania.cafechoice.onCreate(cafechoice.java:24) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2444) 05-02 17:16:28.248: ERROR/AndroidRuntime(678): ... 11 more </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
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    1. USkostas
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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    3. PO
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      1. POhow to use the if statement with radiobuttons
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POhow to use the if statement with radiobuttons
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

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