我正在android上构建一个销售应用程序。该应用程序响应良好，但当我从主活动注销并进入Login活动并输入用户名和密码或默认情况下写入并按Enter键它将不会移至Main活动，它仍然存在在Login活动。这是在第二次登录时发生的。 logcat的：
06-24 08:11:25.550: D/User Name(1210): testuser3 Password admin
06-24 08:11:25.550: E/SoundPool(381): error loading /system/media/audio/ui/KeypressStandard.ogg
06-24 08:11:25.550: W/AudioService(381): Soundpool could not load file: /system/media/audio/ui/KeypressStandard.ogg
06-24 08:11:25.560: E/SoundPool(381): error loading /system/media/audio/ui/KeypressSpacebar.ogg
06-24 08:11:25.560: W/AudioService(381): Soundpool could not load file: /system/media/audio/ui/KeypressSpacebar.ogg
06-24 08:11:25.560: E/SoundPool(381): error loading /system/media/audio/ui/KeypressDelete.ogg
06-24 08:11:25.560: W/AudioService(381): Soundpool could not load file: /system/media/audio/ui/KeypressDelete.ogg
06-24 08:11:25.560: E/SoundPool(381): error loading /system/media/audio/ui/KeypressReturn.ogg
06-24 08:11:25.560: W/AudioService(381): Soundpool could not load file: /system/media/audio/ui/KeypressReturn.ogg
06-24 08:11:25.560: E/SoundPool(381): error loading /system/media/audio/ui/KeypressInvalid.ogg
06-24 08:11:25.560: W/AudioService(381): Soundpool could not load file: /system/media/audio/ui/KeypressInvalid.ogg
06-24 08:11:25.560: W/AudioService(381): onLoadSoundEffects(), Error -1 while loading samples
06-24 08:11:25.560: D/User Name(1210): testuser4 Password admin
06-24 08:11:25.560: D/User Name(1210): Wasiraza Password 12345
06-24 08:11:25.560: D/User Name(1210): wasiuser Password 12345
06-24 08:11:25.560: D/User Name(1210): zeeshansabri Password Ha5hir786
06-24 08:11:29.610: D/ConnectivityService(381): Sampling interval elapsed, updating statistics ..
06-24 08:11:29.650: I/ProcessStatsService(381): Prepared write state in 19ms
06-24 08:11:29.660: D/ConnectivityService(381): Done.
06-24 08:11:29.660: D/ConnectivityService(381): Setting timer for 720seconds
06-24 08:11:29.680: I/ProcessStatsService(381): Pruning old procstats: /data/system/procstats/state-2014-06-21-08-27-00.bin
06-24 08:12:00.000: I/ActivityManager(381): Killing 638:com.android.externalstorage/u0a6 (adj 15): empty for 1804s
06-24 08:12:00.000: I/ActivityManager(381): Killing 569:com.android.printspooler/u0a39 (adj 15): empty for 1815s
通过log标签：SoundPool，通过日志消息：错误加载/system/media/audio/ui/KeypressInvalid.ogg，由PID：381，按应用程序名称：system_process这些是logcat中的错误
当我重新启动应用程序时，应用程序可以启动。这是代码
package com.robin.saeedghani;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.robin.ApiCalls.APICalls;
import com.robin.ApiCalls.APIParameters;
TerritoryController c1 = new TerritoryController(LoginActivity.this);
private Button buttonSubmit;
private EditText editTextUserId, editTextPassword;
private ArrayList<Users> usersArrayList = new ArrayList<Users>();
Boolean isInternetPresent = false, userFound = false;
// Connection detector class
ConnectionDetector cd;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
cd = new ConnectionDetector(getApplicationContext());
setUpViews();
}
@Override
public void onBackPressed() {
super.onBackPressed();
finish();
}
private void getUsers() {
APICalls obj = new APICalls(LoginActivity.this,
APIParameters.ACTION_GETLOGIN, null, LoginActivity.this);
String params = "Get";
obj.execute(params);
}
private void setUpViews() {
cd = new ConnectionDetector(getApplicationContext());
buttonSubmit = (Button) findViewById(R.id.buttonSubmit);
buttonSubmit.setOnClickListener(this);
editTextUserId = (EditText) findViewById(R.id.editTextUserId);
editTextPassword = (EditText) findViewById(R.id.editTextPassword);
isInternetPresent = cd.isConnectingToInternet();
// check for Internet status
if (isInternetPresent) {
getUsers();
} else {
getUserSQlite();
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v.getId() == R.id.buttonSubmit) {
InputMethodManager imm = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
isInternetPresent = cd.isConnectingToInternet();
if (usersArrayList.size() < 0) {
getUserSQlite();
if (usersArrayList.size() < 0) {
if (isInternetPresent) {
} else {
Toast.makeText(getApplicationContext(),
"Please Connect to the Internet.",Toast.LENGTH_SHORT).show();
}
}
}
if (usersArrayList.size() > 0) {
if (editTextUserId.getText().toString().length() > 0) {
if (editTextPassword.getText().toString().length() > 0) {
String edUser = editTextUserId.getText().toString();
String edPass = editTextPassword.getText().toString();
for (int i = 0; i < usersArrayList.size(); i++) {
Users user = usersArrayList.get(i);
String userString = user.getUserName();
String passString = user.getPassword();
Log.d("User Name ", user.getUserName()
+ " Password " + user.getPassword());
compareCredentials(userString, passString, edUser,
edPass);
}
if (userFound == false) {
Toast.makeText(getApplicationContext(),
"User name or Password is wrong.",Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(),
"Please Add Password.", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(),
"Please Add Username.", Toast.LENGTH_SHORT).show();
}
}
}
}
private void compareCredentials(String U, String P, String edtU, String edtP) {
if (userFound == false) {
if (U.equals(edtU) && P.equals(edtP)) {
userFound = true;
Intent intent = new Intent(LoginActivity.this,
MainActivity.class);
// intent.putExtra("username",
// editTextUserId.getText().toString());
Constants.userName = U;// user name enter
//Toast.makeText(getApplicationContext(), Constants.userName,
//Toast.LENGTH_SHORT).show();
startActivity(intent);
} else {
}
} else {
return;
}
}
@Override
public void RecievedReponse(String response) {
// TODO Auto-generated method stub
CategoriesParser.getUsersData(response, this);
getUserSQlite();
}
@Override
public void RecievedError(String error) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), error, 10).show();
}
private void getUserSQlite() {
try {
usersArrayList.clear();
usersArrayList = c1.GETUSERS("testincharge");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}