尝试将数据存储在我的数据库时应用程序崩溃

当我单击按钮将数据存储到数据库时，我的应用程序给出以下NullPointerException。尝试将数据存储在我的数据库时应用程序崩溃

FATAL EXCEPTION: main Process: neoxsoft.com.taxmukti, PID: 28055 java.lang.NullPointerException 
at neoxsoft.com.taxmukti.RegisterActivity$1.onClick(RegisterActivity.java:50) 
at android.view.View.performClick(View.java:4452) 
at android.view.View$PerformClick.run(View.java:18451) 
at android.os.Handler.handleCallback(Handler.java:733) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:136) 
at android.app.ActivityThread.main(ActivityThread.java:5421) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:979) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:795) 
at dalvik.system.NativeStart.main(Native Method

这里是我的代码：

public class RegisterActivity extends AppCompatActivity { 
EditText fnm_et,lnm_et,eid_et,contact_et,pass_et,repass_et; 
Button submit_btn,log_btn; 
StoreData sd; 
DataBaseService db=new DataBaseService(this); 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_register); 

    fnm_et= (EditText) findViewById(R.id.fnm_et); 
    lnm_et= (EditText) findViewById(R.id.lnm_et); 
    eid_et= (EditText) findViewById(R.id.eid_et); 
    contact_et= (EditText) findViewById(R.id.contact_et); 
    pass_et= (EditText) findViewById(R.id.pass_et); 
    repass_et= (EditText) findViewById(R.id.repass_et); 

    submit_btn= (Button) findViewById(R.id.submit_btn); 
    log_btn= (Button) findViewById(R.id.log_btn); 

    submit_btn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

       String fname= fnm_et.getText().toString(); 
       String lname=lnm_et.getText().toString(); 
       String contact=contact_et.getText().toString(); 
       String mail=eid_et.getText().toString(); 
       String pass=pass_et.getText().toString(); 
       String repass=repass_et.getText().toString(); 
       Log.d("log1","getAlltext"); 

       sd.setF_name(fname); 
       sd.setL_name(lname); 
       sd.setMob_number(contact); 
       sd.setE_mail(mail); 
       sd.setUser_pass(pass); 
       sd.setUser_repass(repass); 
       Log.d("log2", "setAlltext"); 

       db.insertData(sd); 
       Intent intent=new Intent(RegisterActivity.this,LoginActivity.class); 
       startActivity(intent); 
       RegisterActivity.this.finish(); 
     } 
    }); 

    log_btn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent intent=new Intent(RegisterActivity.this,LoginActivity.class); 
      startActivity(intent); 
      RegisterActivity.this.finish(); 
     } 
    }); 
}

}

我初始化所有组件

fnm_et= (EditText) findViewById(R.id.fnm_et); 
    lnm_et= (EditText) findViewById(R.id.lnm_et); 
    eid_et= (EditText) findViewById(R.id.eid_et); 
    contact_et= (EditText) findViewById(R.id.contact_et); 
    pass_et= (EditText) findViewById(R.id.pass_et); 
    repass_et= (EditText) findViewById(R.id.repass_et); 

    submit_btn= (Button) findViewById(R.id.submit_btn); 
    log_btn= (Button) findViewById(R.id.log_btn);

来源

2016-01-22 Kalmeshwar Gurav

在''RegisterActivity $ 1.onClick（RegisterActivity.java:50）' –

'显示您的代码至少发布onClick代码 –

发布您的代码活动 –

你的SD变量为null，并抛出NPE 。初始化它。

来源

2016-01-22 10:42:01 Fustigador

当我写'StoreData sd = new StoreData（）;'错误消失时谢谢 –

乐意帮忙... – Fustigador

尝试将数据存储在我的数据库时应用程序崩溃

回答

相关问题