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POAndroid Runtime error
 

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    <p>I am a beginner at writing android apps. Can you please help me how to deal with this problem. i have included the logcat entry and activity class.</p> <p><strong>log:</strong> </p> <pre><code>11-07 12:46:28.245: D/AndroidRuntime(579): Shutting down VM 11-07 12:46:28.245: W/dalvikvm(579): threadid=1: thread exiting with uncaught exception (group=0x40015560) 11-07 12:46:28.285: E/AndroidRuntime(579): FATAL EXCEPTION: main 11-07 12:46:28.285: E/AndroidRuntime(579): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.trial.login/com.trial.login.Login1Activity}: java.lang.NullPointerException 11-07 12:46:28.285: E/AndroidRuntime(579): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.os.Handler.dispatchMessage(Handler.java:99) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.os.Looper.loop(Looper.java:123) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.app.ActivityThread.main(ActivityThread.java:3683) 11-07 12:46:28.285: E/AndroidRuntime(579): at java.lang.reflect.Method.invokeNative(Native Method) 11-07 12:46:28.285: E/AndroidRuntime(579): at java.lang.reflect.Method.invoke(Method.java:507) 11-07 12:46:28.285: E/AndroidRuntime(579): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 11-07 12:46:28.285: E/AndroidRuntime(579): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 11-07 12:46:28.285: E/AndroidRuntime(579): at dalvik.system.NativeStart.main(Native Method) 11-07 12:46:28.285: E/AndroidRuntime(579): Caused by: java.lang.NullPointerException 11-07 12:46:28.285: E/AndroidRuntime(579): at com.trial.login.Login1Activity.onCreate(Login1Activity.java:28) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 11-07 12:46:28.285: E/AndroidRuntime(579): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 11-07 12:46:28.285: E/AndroidRuntime(579): ... 11 more </code></pre> <p><strong>LoginActivity.class:</strong></p> <pre><code> package com.trial.login; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class Login1Activity extends Activity { TextView username, password; EditText user_edit, pwd_edit; Button login, cancel; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); login = (Button) findViewById(R.id.bt1); cancel = (Button) findViewById(R.id.bt2); username = (TextView) findViewById(R.id.tv1); password = (TextView) findViewById(R.id.tv2); user_edit = (EditText) findViewById(R.id.txtUname); pwd_edit = (EditText) findViewById(R.id.txtPwd); login.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { display(); } }); } cancel.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { user_edit.clearComposingText(); pwd_edit.clearComposingText(); } }); public void display(){ String user_temp, pwd_temp; user_temp = user_edit.getText().toString(); pwd_temp = pwd_edit.getText().toString(); username.setText(user_temp); password.setText(pwd_temp); } } </code></pre>
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    1. USHiral
    1. USSammy
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    1. PO
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    2. PO
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    3. PO
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      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COcould you post your main.xml file?
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      1. USVladimir
    2. CO@Vladimir It worked! Thanks
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      1. USSammy
 

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