強制關閉應用程序

-1

我不知道爲什麼，但我的應用程序突然一直保持對我的關閉力量。它工作得很好。強制關閉應用程序

請看看。

public class AgentPortalActivity extends Activity implements OnClickListener { 

String username; 
String password; 
Button login; 
EditText uid; 
EditText pwd; 
CheckBox chkRememberPassword; 
SharedPreferences loginPreferences; 
SharedPreferences.Editor loginPrefsEditor; 
Boolean saveLogin; 

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

    // User Id and Password Text Fields 
    uid = (EditText) findViewById(R.id.uid); 
    pwd = (EditText) findViewById(R.id.pw); 

    // Converts the Text in the User Id and Password field to Strings 
    username = uid.getText().toString(); 
    password = pwd.getText().toString(); 

    // Login Button On Click Listener 
    login = (Button) findViewById(R.id.login); 
    login.setOnClickListener(this); 

    // Remember Password Save Properties 
    chkRememberPassword = (CheckBox) findViewById(R.id.chkRememberPassword); 
    loginPreferences = getSharedPreferences("loginPrefs", MODE_PRIVATE); 
    loginPrefsEditor = loginPreferences.edit(); 

    saveLogin = loginPreferences.getBoolean("saveLogin", false); 

    if (saveLogin == true) { 
     uid.setText(loginPreferences.getString(username, "")); 
     pwd.setText(loginPreferences.getString(password, "")); 
     chkRememberPassword.setChecked(true); 
     // End 

    } 
} 

public void onClick(View view) { 
    if (view == login) { 

     // Loading Dialog Box 
     final ProgressDialog dialog = new ProgressDialog(
       AgentPortalActivity.this); 
     dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); 
     dialog.setMessage("Logging In..."); 
     dialog.show(); 

     Thread t = new Thread(new Runnable() { 
      public void run() { 
       while (dialog.getProgress() < dialog.getMax()) { 

        try { 

         Thread.sleep(50); 
        } catch (Exception e) {/* no-op */ 
        } 
       } 
       dialog.dismiss(); 
      } 
     }); 
     t.start(); 
     // End Of Loading Dialog Box 

     // Hides Soft Keyboard 
     InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
     imm.hideSoftInputFromWindow(uid.getWindowToken(), 0); 
     imm.hideSoftInputFromWindow(pwd.getWindowToken(), 0); 

     // Button OnClick Vibrating Service 
     Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
     vib.vibrate(50); 

     // Send username and password strings into screen1 class 
     Intent i = new Intent(this, screen1.class); 
     i.putExtra("uid", username); 
     i.putExtra("pwd", password); 
     startActivity(i); 
     // End 

     if (chkRememberPassword.isChecked()) { 
      loginPrefsEditor.putBoolean("saveLogin", true); 
      loginPrefsEditor.putString(username, username); 
      loginPrefsEditor.putString(password, password); 
      loginPrefsEditor.commit(); 
     } else { 
      loginPrefsEditor.clear(); 
      loginPrefsEditor.commit(); 
     } 

     doSomethingElse(); 
    } 
} 

public void doSomethingElse() { 

    overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

}

}

我的繼承人二等

public class screen1 extends Activity implements View.OnClickListener { 

String username; 
String password; 

// EditTexts 
final EditText milein = (EditText) findViewById(R.id.milein); 
final EditText zipin = (EditText) findViewById(R.id.zipin); 
final EditText mileout = (EditText) findViewById(R.id.mileout); 
final EditText zipout = (EditText) findViewById(R.id.zipout); 
final EditText feed = (EditText) findViewById(R.id.feed); 

// TextViews 
final TextView dispatch = (TextView) findViewById(R.id.dispatch); 
final TextView dispatchnum = (TextView) findViewById(R.id.dispatchnum); 
final TextView csr = (TextView) findViewById(R.id.csr); 
final TextView csrnum = (TextView) findViewById(R.id.csrnum); 
final TextView it = (TextView) findViewById(R.id.it); 
final TextView itnum = (TextView) findViewById(R.id.itnum); 
final TextView thoughts = (TextView) findViewById(R.id.thoughts); 
final TextView information = (TextView) findViewById(R.id.information); 

//ToggleButtons 
final ToggleButton checkinbutton = (ToggleButton) findViewById(R.id.checkinbutton); 

// Buttons 
final Button submit = (Button) findViewById(R.id.submit); 
final Button send = (Button) findViewById(R.id.send); 


public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.screen1); 

    // Calls String from AgentPortalActivity class to pass through to 
    // screen1 class 
    Intent i = getIntent(); 
    username = i.getExtras().getString("uid"); 
    password = i.getExtras().getString("pwd"); 
    // End 

    // Passes username and password strings and inserts into URL for login 
    // and pwd 
    JSONObject json = JSONfunction 
      .getJSONfromURL("http://whatever.com/api/?type=json&uid=" 
        + (username) + "&pwd=" + (password)); 
    // End 

    try { 

     // boolean suspended = json.getBoolean("suspended"); 
     String firstName = json.getString("firstName"); 
     String lastName = json.getString("lastName"); 
     // int checkdin = json.getInt("checkedin"); 
     // int checkindatetime = json.getInt("checkindatetime"); 

     // Get Json object address 
     JSONObject address = json.getJSONObject("address"); 
     String streetAddress = address.getString("streetAddress"); 
     String city = address.getString("city"); 
     String state = address.getString("state"); 
     String postalCode = address.getString("postalCode"); 
     // End 

     // Get PhoneNumber Array 
     JSONArray phoneNumbers = json.getJSONArray("phoneNumber"); 
     // String type = phoneNumbers.getJSONObject(0).getString("type"); 
     String number = phoneNumbers.getJSONObject(0).getString("number"); 
     // End 

     information.setText("Hello," + " " + (firstName) + " " + (lastName) 
       + "!" + " " + "Your Home Number is" + " " + (number) + " " 
       + "Your Address is" + " " + (streetAddress) + " " + (city) 
       + " " + (state) + " " + (postalCode)); 

    } catch (JSONException e1) { 
     // TODO Auto-generated catch block 
     e1.printStackTrace(); 
    } 

    /** Submit Button Invisible Child Properties */ 
    submit.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 

      // Button OnClick Vibrating Service 
      Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
      vib.vibrate(50); 

      // Submit Mile-IN Mile-Out Button 
      if (submit.isPressed()) { 
       milein.setVisibility(View.GONE); 
       zipin.setVisibility(View.GONE); 
       mileout.setVisibility(View.GONE); 
       zipout.setVisibility(View.GONE); 
       submit.setVisibility(View.GONE); 
       dispatch.setVisibility(View.GONE); 
       dispatchnum.setVisibility(View.GONE); 
       csr.setVisibility(View.GONE); 
       csrnum.setVisibility(View.GONE); 
       it.setVisibility(View.GONE); 
       itnum.setVisibility(View.GONE); 
       thoughts.setVisibility(View.GONE); 
       feed.setVisibility(View.GONE); 
       send.setVisibility(View.GONE); 
       // End 

       // Button OnClick Vibrating Service 
       Vibrator vib1 = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
       vib1.vibrate(50); 
       // End 

       // Toast "Please Wait" Upon Clicking Submit Button 
       Toast.makeText(getBaseContext(), "Please Wait...", 
         Toast.LENGTH_SHORT).show(); 
       // End 

      } 
     } 
    }); 

    // Boolean for Check-In Button Sharedpreferences 
    final SharedPreferences preferences = getPreferences(MODE_PRIVATE); 
    boolean tgpref = preferences.getBoolean("tgpref", false); 
    checkinbutton.setChecked(tgpref); 
    // End 

    // ToggleButton Check-IN 
    checkinbutton.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 

      // Button OnClick Vibrating Service 
      Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
      vib.vibrate(50); 
      // End 

      // Only Displays Mile-in Zip-in and Submit Button 
      if (checkinbutton.isChecked()) { 
       milein.setVisibility(View.VISIBLE); 
       zipin.setVisibility(View.VISIBLE); 
       submit.setVisibility(View.VISIBLE); 
       mileout.setVisibility(View.GONE); 
       zipout.setVisibility(View.GONE); 
       dispatch.setVisibility(View.GONE); 
       dispatchnum.setVisibility(View.GONE); 
       csr.setVisibility(View.GONE); 
       csrnum.setVisibility(View.GONE); 
       it.setVisibility(View.GONE); 
       itnum.setVisibility(View.GONE); 
       thoughts.setVisibility(View.GONE); 
       feed.setVisibility(View.GONE); 
       send.setVisibility(View.GONE); 
       // End 

       // Button OnClick Vibrating Service 
       Vibrator vib1 = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
       vib1.vibrate(50); 
       // End 

       Toast.makeText(getBaseContext(), "Checking In...", 
         Toast.LENGTH_SHORT).show(); 

       // Boolean Preferences for Checkinbutton ToggleButton 
       // Remembers Toggle State Checked 
       SharedPreferences.Editor editor = preferences.edit(); 
       final SharedPreferences preferences = getPreferences(MODE_PRIVATE); 
       boolean tgpref = preferences.getBoolean("tgpref", false); 
       checkinbutton.setChecked(tgpref); 
       editor.putBoolean("tgpref", true); 
       editor.commit(); 
       // End 

      } else { 

       mileout.setVisibility(View.VISIBLE); 
       zipout.setVisibility(View.VISIBLE); 
       submit.setVisibility(View.VISIBLE); 
       milein.setVisibility(View.GONE); 
       zipin.setVisibility(View.GONE); 
       dispatch.setVisibility(View.GONE); 
       dispatchnum.setVisibility(View.GONE); 
       csr.setVisibility(View.GONE); 
       csrnum.setVisibility(View.GONE); 
       it.setVisibility(View.GONE); 
       itnum.setVisibility(View.GONE); 
       thoughts.setVisibility(View.GONE); 
       feed.setVisibility(View.GONE); 
       send.setVisibility(View.GONE); 

       // Boolean Preferences for Checkinbutton ToggleButton 
       // Remembers Toggle State Un-Checked 
       SharedPreferences.Editor editor = preferences.edit(); 
       editor.putBoolean("tgpref", false); 
       editor.commit(); 
       // End 

       // AlertDialog Meal-Periods Button Configurations 
       final AlertDialog alertDialog = new AlertDialog.Builder(
         screen1.this).create(); 
       alertDialog 
         .setMessage("I hereby verify that I have received all my 10 minute rest periods and 30 minute meal breaks today."); 
       alertDialog.setButton("Agree", 
         new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, 
            int which) { 
           Toast.makeText(getBaseContext(), 
             "Checking Out...", 
             Toast.LENGTH_SHORT).show(); 
          } 
         }); 
       alertDialog.setButton2("Cancel", 
         new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, 
            int which) { 
           Toast.makeText(
             getBaseContext(), 
             "Please contact Ro*** Mu*** (Human Resource) to report any discrepancies", 
             Toast.LENGTH_LONG).show(); 
           checkinbutton.setChecked(true); 
           milein.setVisibility(View.GONE); 
           zipin.setVisibility(View.GONE); 
           mileout.setVisibility(View.GONE); 
           zipout.setVisibility(View.GONE); 
           submit.setVisibility(View.GONE); 
           dispatch.setVisibility(View.GONE); 
           dispatchnum.setVisibility(View.GONE); 
           csr.setVisibility(View.GONE); 
           csrnum.setVisibility(View.GONE); 
           it.setVisibility(View.GONE); 
           itnum.setVisibility(View.GONE); 
           thoughts.setVisibility(View.GONE); 
           feed.setVisibility(View.GONE); 
           send.setVisibility(View.GONE); 
           SharedPreferences.Editor editor = preferences 
             .edit(); 
           editor.putBoolean("tgpref", true); 
           editor.commit(); 
          } 
         }); 
       alertDialog.show(); 
       // End 

      } 
     }; 
    }); 

    Button statusbutton = (Button) findViewById(R.id.statusbutton); 
    statusbutton.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 

      // Button OnClick Vibrating Service 
      Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
      vib.vibrate(50); 
      // End 

      /** Fading Transition Effect */ 
      overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

      /** Status Bar */ 
      final ProgressDialog dialog = new ProgressDialog(screen1.this); 
      dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); 
      dialog.setMessage("Getting Status Please Wait..."); 
      dialog.show(); 

      Thread t = new Thread(new Runnable() { 
       public void run() { 
        while (dialog.getProgress() < dialog.getMax()) { 
         try { 

          // Send username and password strings into 
          // screen1 class 
          Intent i = new Intent(screen1.this, 
            statuspage.class); 
          i.putExtra("uid", username); 
          i.putExtra("pwd", password); 
          startActivity(i); 
          // End 

          Thread.sleep(50); 
         } catch (Exception e) {/* no-op */ 
         } 
        } 
        dialog.dismiss(); 
       } 
      }); 
      t.start(); 
      /** End Of Status Bar */ 

     } 

    }); 

    Button jobs = (Button) findViewById(R.id.jobs); 
    jobs.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      // Button OnClick Vibrating Service 
      Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
      vib.vibrate(50); 

      startActivity(new Intent(screen1.this, Jobs.class)); 
      screen1.this.finish(); 

      /** Fading Transition Effect */ 
      overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

      /** Status Bar */ 
      final ProgressDialog dialog2 = new ProgressDialog(screen1.this); 
      dialog2.setProgressStyle(ProgressDialog.STYLE_SPINNER); 
      dialog2.setMessage("Loading Jobs Please Wait..."); 
      dialog2.show(); 

      Thread t1 = new Thread(new Runnable() { 
       public void run() { 
        while (dialog2.getProgress() < dialog2.getMax()) { 
         try { 
          Thread.sleep(50); 
         } catch (Exception e) {/* no-op */ 
         } 
        } 
        dialog2.dismiss(); 
       } 
      }); 
      t1.start(); 
      /** End Of Status Bar */ 
     } 

    }); 

    Button contact = (Button) findViewById(R.id.contact); 
    contact.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View arg0) { 

      // Button OnClick Vibrating Service 
      Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
      vib.vibrate(50); 

      dispatch.setVisibility(View.VISIBLE); 
      dispatchnum.setVisibility(View.VISIBLE); 
      csr.setVisibility(View.VISIBLE); 
      csrnum.setVisibility(View.VISIBLE); 
      it.setVisibility(View.VISIBLE); 
      itnum.setVisibility(View.VISIBLE); 
      milein.setVisibility(View.GONE); 
      zipin.setVisibility(View.GONE); 
      mileout.setVisibility(View.GONE); 
      zipout.setVisibility(View.GONE); 
      submit.setVisibility(View.GONE); 
      thoughts.setVisibility(View.GONE); 
      feed.setVisibility(View.GONE); 
      send.setVisibility(View.GONE); 

     } 
    }); 

    Button feedback = (Button) findViewById(R.id.feedback); 
    feedback.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      // Button OnClick Vibrating Service 
      Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
      vib.vibrate(50); 

      thoughts.setVisibility(View.VISIBLE); 
      feed.setVisibility(View.VISIBLE); 
      send.setVisibility(View.VISIBLE); 
      milein.setVisibility(View.GONE); 
      zipin.setVisibility(View.GONE); 
      mileout.setVisibility(View.GONE); 
      zipout.setVisibility(View.GONE); 
      submit.setVisibility(View.GONE); 
      dispatch.setVisibility(View.GONE); 
      dispatchnum.setVisibility(View.GONE); 
      csr.setVisibility(View.GONE); 
      csrnum.setVisibility(View.GONE); 
      it.setVisibility(View.GONE); 
      itnum.setVisibility(View.GONE); 
     } 
    }); 
} 

@Override 
public void onBackPressed() { 

    // Button OnClick Vibrating Service 
    Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
    vib.vibrate(50); 

    startActivity(new Intent(screen1.this, AgentPortalActivity.class)); 
    screen1.this.finish(); 

    /** Fading Transition Effect */ 
    overridePendingTransition(R.anim.fadein, R.anim.fadeout); 
    return; 

} 

@Override 
public void onClick(View v) { 

}

}

，這裏是我的logcat

03-22 09:44:56.031: I/Process(21770): Sending signal. PID: 21770 SIG: 9 
03-22 09:44:57.679: D/dalvikvm(21798): GC_EXTERNAL_ALLOC freed 58K, 44% free 3036K/5379K, external 1596K/2108K, paused 35ms 
03-22 09:44:57.788: D/dalvikvm(21798): GC_EXTERNAL_ALLOC freed 11K, 44% free 3056K/5379K, external 3498K/3748K, paused 36ms 
03-22 09:44:57.804: D/AndroidRuntime(21798): Shutting down VM 
03-22 09:44:57.804: W/dalvikvm(21798): threadid=1: thread exiting with uncaught exception (group=0x40015578) 
03-22 09:44:57.812: E/AndroidRuntime(21798): FATAL EXCEPTION: main 
03-22 09:44:57.812: E/AndroidRuntime(21798): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jetdelivery.mobile/com.jetdelivery.mobile.AgentPortalActivity}: java.lang.NullPointerException 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.os.Handler.dispatchMessage(Handler.java:99) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.os.Looper.loop(Looper.java:130) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.app.ActivityThread.main(ActivityThread.java:3687) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at java.lang.reflect.Method.invokeNative(Native Method) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at java.lang.reflect.Method.invoke(Method.java:507) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at dalvik.system.NativeStart.main(Native Method) 
03-22 09:44:57.812: E/AndroidRuntime(21798): Caused by: java.lang.NullPointerException 
03-22 09:44:57.812: E/AndroidRuntime(21798): at com.jetdelivery.mobile.AgentPortalActivity.onCreate(AgentPortalActivity.java:40) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
03-22 09:44:57.812: E/AndroidRuntime(21798): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 
03-22 09:44:57.812: E/AndroidRuntime(21798): ... 11 more 
03-22 09:45:04.652: I/Process(21798): Sending signal. PID: 21798 SIG: 9

來源

2012-03-22 John Nguyen

有一些你使用的對象的值爲null（因此你的NullPointerException）。 AgentPortalActivity.java的第40行是什麼？ – kabuko 2012-03-22 17:05:37

只需運行在調試模式下，通過你的onCreate，看看拋出了什麼是空指針異常... – Calvin 2012-03-22 17:07:23

對不起，不太清楚你的意思@第40行 – 2012-03-22 17:08:47

// Converts the Text in the User Id and Password field to Strings 
    username = uid.getText().toString(); 
    password = pwd.getText().toString();

These lines給你NullPointerExcepton。因爲當它們不包含任何內容時，您正嘗試從這些edittext中獲取OnCreate（）本身中的文本。用戶無法查看視圖並與視圖進行交互，直到onResume（）。您需要將這兩行代碼以及其他所有代碼都關閉，然後再點擊按鈕。試試這個代碼。我已經將它們移動到onClick（）給你一個想法：

public class AgentPortalActivity extends Activity implements OnClickListener { 

String username; 
String password; 
Button login; 
EditText uid; 
EditText pwd; 
CheckBox chkRememberPassword; 
SharedPreferences loginPreferences; 
SharedPreferences.Editor loginPrefsEditor; 
Boolean saveLogin; 

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

    // User Id and Password Text Fields 
    uid = (EditText) findViewById(R.id.uid); 
    pwd = (EditText) findViewById(R.id.pw); 



    // Login Button On Click Listener 
    login = (Button) findViewById(R.id.login); 
    login.setOnClickListener(this); 

    // Remember Password Save Properties 
    chkRememberPassword = (CheckBox) findViewById(R.id.chkRememberPassword); 
    loginPreferences = getSharedPreferences("loginPrefs", MODE_PRIVATE); 
    loginPrefsEditor = loginPreferences.edit(); 

    saveLogin = loginPreferences.getBoolean("saveLogin", false); 

    if (saveLogin == true) { 
     uid.setText(loginPreferences.getString(username, "")); 
     pwd.setText(loginPreferences.getString(password, "")); 
     chkRememberPassword.setChecked(true); 
     // End 

    } 
} 

public void onClick(View view) { 
    if (view == login) { 


     // Converts the Text in the User Id and Password field to Strings 
     username = uid.getText().toString(); 
     password = pwd.getText().toString(); 

     // Loading Dialog Box 
     final ProgressDialog dialog = new ProgressDialog(
       AgentPortalActivity.this); 
     dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); 
     dialog.setMessage("Logging In..."); 
     dialog.show(); 

     Thread t = new Thread(new Runnable() { 
      public void run() { 
       while (dialog.getProgress() < dialog.getMax()) { 

        try { 

         Thread.sleep(50); 
        } catch (Exception e) {/* no-op */ 
        } 
       } 
       dialog.dismiss(); 
      } 
     }); 
     t.start(); 
     // End Of Loading Dialog Box 

     // Hides Soft Keyboard 
     InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
     imm.hideSoftInputFromWindow(uid.getWindowToken(), 0); 
     imm.hideSoftInputFromWindow(pwd.getWindowToken(), 0); 

     // Button OnClick Vibrating Service 
     Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 
     vib.vibrate(50); 

     // Send username and password strings into screen1 class 
     Intent i = new Intent(this, screen1.class); 
     i.putExtra("uid", username); 
     i.putExtra("pwd", password); 
     startActivity(i); 
     // End 

     if (chkRememberPassword.isChecked()) { 
      loginPrefsEditor.putBoolean("saveLogin", true); 
      loginPrefsEditor.putString(username, username); 
      loginPrefsEditor.putString(password, password); 
      loginPrefsEditor.commit(); 
     } else { 
      loginPrefsEditor.clear(); 
      loginPrefsEditor.commit(); 
     } 

     doSomethingElse(); 
    } 
} 

public void doSomethingElse() { 

    overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

}

來源

2012-03-22 17:11:20 Akhil

謝謝Akhill！我讓主課再次工作，現在我需要明白爲什麼我的第二課（screen1）現在正在演戲。 – 2012-03-22 17:20:11

阿克希爾，你能不能幫我弄清楚爲什麼我的第二堂課不斷崩潰？一直試圖找出過去一小時，我很難過。 – 2012-03-22 17:56:53

你面臨什麼問題？ – Akhil 2012-03-23 13:13:46

強制關閉應用程序

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