更新：感谢大家尝试帮助我解决这个bug。我仍然不确定原因，但我能够回滚到以前的提交并从那里继续开发。这个之前的提交也显示了相同的bug，但是在我注释掉 button.performClick() 之后，它消失了。奇怪的是，这在最近的提交上不起作用。
我仍然不理解这个bug，如果有任何更多的帮助确定根本原因，我将不胜感激。我的最大担心是无意中重新引入它。
我遇到了一个最疯狂的错误。
OnCreate方法一遍又一遍地被调用，导致我的应用程序冻结并出现轻微的闪烁。唯一的解决方案是退出到主屏幕，并从设置菜单强制退出应用程序。
以下是详细情况：
- 应用程序启动（主Activity）
- 主Activity调用第二个Activity
- 第二个Activity调用onCreate，像往常一样进行设置
- 第二个Activity随机决定退出onCreate <-- 我认为这就是正在发生的事情
- 第二个Activity的onCreate再次被调用。它永远不会返回到主Activity。
我运行了调试器，似乎第二个Activity成功完成了onComplete/onResume序列，然后决定退出并重新启动。
有人听说过这种行为吗？
我没有注意到任何异常被抛出。此外，在调试过程中，我确实检查了你看到的那些静默失败位置。（这是在我将其填满打印语句之前的旧代码）
更新：当尝试停止进程时，我必须打开飞行模式。这意味着它与这个代码块有关（第二个Activity）
else if (Network.haveNetworkConnection(Login.getContext()) && Login.checkClientId())
{...}
没有网络的情况下，它会触发else语句并且不显示这种行为。
代码： 在主Activity的onResume()函数中，我调用了第二个Activity：
@Override
public void onResume()
{
super.onResume();
//Check If logged in, else go to login page
Login.setContext(getApplicationContext());
//Reset Notification Number
GCMIntentService.cancelNotifications();
/** GO TO LOGIN **/
if(!Login.isLoggedIn())
{
//If user is not logged in, open login page
System.out.println("RESUMING MAIN AND STARTING LOGIN INTENT");
Intent intent = new Intent(ActivityMain.this, ActivityLogin.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK|Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
} else
{
Login.setupStuffOnce();
Event.pullEvents(); //Get New Events
//Update ListView
updateMainFeed();
}
}
这是第二个活动：
public class ActivityLogin extends Activity
{
private String postData;
//private Context c;
//final Timer timer = new Timer();
//Facebook Stuff
private Facebook facebook = new Facebook(Config.FBAPPID);
private AsyncFacebookRunner mAsyncRunner = new AsyncFacebookRunner(facebook);
//Layout Stuff
EditText username, password;
Button loginButton, signupButton;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// Open Database
Login.setContext(getApplicationContext());
Database.open(getApplicationContext());
}
/*
* @Override public void onPause() { s }
*/
@Override
public void onResume()
{
super.onResume();
// shouldn't put here but oh well
init();
//If coming from ActivitySignup
if(Transfer.username != null)
{
username.setText(Transfer.username);
password.setText(Transfer.password);
Transfer.password = null;
Transfer.username = null;
loginButton.performClick();
}
}
public void init()
{
Login.getUserLoggedIn();
if (Login.isLoggedIn())
{
//Do Any Additional Setup
Login.setupStuffOnce();
// If user is logged in, open main
Intent intent = new Intent(ActivityLogin.this, ActivityMain.class);
//intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
} else if (Network.haveNetworkConnection(Login.getContext()) && Login.checkClientId())
{
// Else, Make User Login
// Inflate Login and Present Website
String clientid = Login.getClientId();
System.out.println("clientid:" + clientid);
//System.exit(0);
postData = "mobile=1&client_id="+Login.getClientId();
// Inflate the view
setContentView(R.layout.activitylogin3);
username = (EditText) findViewById(R.id.username);
password = (EditText) findViewById(R.id.password);
//Inflate the Button
loginButton = (Button) findViewById(R.id.loginButton);
signupButton = (Button) findViewById(R.id.signupButton);
signupButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Intent intent = new Intent(ActivityLogin.this, ActivitySignup.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(intent);
}
});
loginButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
int res = Login.sendLogin(username.getText().toString(), password.getText().toString());
if(res == 202)
{
//Login Successful
//Check if facebooked.
if(Login.isFacebooked())
{
//Just go to main
Intent intent = new Intent(ActivityLogin.this, ActivityMain.class);
//Are these flags necessary?
//intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
} else
{
//Go to facebook login page
//Intent intent = new Intent(ActivityLogin.this, ActivityFBLogin.class);
//startActivity(intent);
//Login via Facebook
doFacebook();
}
} else
{
System.out.println("Login Failed: "+res);
if(res == 405)
{
Toast.makeText(getApplicationContext(), "Incorrect Username/Password", Toast.LENGTH_SHORT).show();
password.setText("");
}
else
Toast.makeText(getApplicationContext(), "Network Error", Toast.LENGTH_SHORT).show(); //Not entirely true in all cases i think
}
/*Login.getUserLoggedIn();
if(Login.isLoggedIn())
{
Intent intent = new Intent(ActivityLogin.this, ActivityMain.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
} else {
Toast.makeText(getApplicationContext(), "Please Login Above", Toast.LENGTH_SHORT).show();
}*/
}
});
} else
{
// Not Logged In and No Internet Access
setContentView(R.layout.activitylogintext);
EditText text = (EditText) findViewById(R.id.text);
text.setText("No Internet Connection Detected\n requires internet to login");
Button button = (Button) findViewById(R.id.refreshButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
//Login.getUserLoggedIn();
if(Network.haveNetworkConnection(Login.getContext()))
{
Intent intent = new Intent(ActivityLogin.this, ActivityLogin.class);
//intent.setFlags();
startActivity(intent);
} else {
Toast.makeText(getApplicationContext(), "No Internet Access Detected", Toast.LENGTH_SHORT).show();
}
}
});
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
facebook.authorizeCallback(requestCode, resultCode, data);
}
public void doFacebook()
{
facebook.authorize(this, Config.facebookPermissions, new DialogListener() {
@Override
public void onComplete(Bundle values) {
/*SharedPreferences.Editor editor = state.edit();
editor.putString("access_token", facebook.getAccessToken());
editor.putLong("access_expires", facebook.getAccessExpires());
editor.commit();
*/
//Input into database
Login.saveAccessToken(facebook.getAccessToken());
Login.setFB(facebook.getAccessToken());
//Login.sendAccessToken(facebook.getAccessToken());
//Intent into Main Activity
Intent intent = new Intent(ActivityLogin.this, ActivityMain.class);
//intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
@Override
public void onFacebookError(FacebookError error) {
Toast.makeText(getApplicationContext(), "Error: "+error.getErrorType(), Toast.LENGTH_SHORT).show();
}
@Override
public void onError(DialogError e) {
Toast.makeText(getApplicationContext(), "Error: "+e.getMessage(), Toast.LENGTH_SHORT).show();
}
@Override
public void onCancel() {}
});
}
public boolean checkForUserID(Context c)
{
try{
String res = Network.getUrl("www.website.com/mobile.php?got_user=1&client_id="+Login.getClientId());
JSONObject json = JSON.constructObject(res);
if(JSON.handleCode(json))
{
if(json.getString("type").equals("userid"))
{
Login.setLogin(json.getString("data"));
return true;
}
}
} catch(Exception e)
{
//Silent Fail
}
return false;
}
}
return或运行到结尾）或3）进程被杀死（这不应该发生）。 - user166390startActivityForResult传递负值或在onCreate中调用finish引起的问题（这不一定会改变任何退出点，但可能会导致其他交互）。 - user166390onCreate中调用第二个Activity。 - iagreen