我有一个使用 JSON 或 mysql 作为数据库的 android 应用程序。在这种情况下，用户必须输入某个数字，如果输入错误，它会调用自己的活动并说输入的数字错误。我尝试了五次或更多次或有时，我输入错误的数字，它会被强制关闭。我不明白为什么会发生。这是我的示例代码
Intent start = getIntent();
try{
int cekStart = start.getExtras().getInt("status");
Toast.makeText(getBaseContext(), "Maaf Tidak Terdaftar", 3).show();
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setCancelable(false);
//AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Login");
alert.setMessage("Masukkan Data Anda");
// Set an EditText view to get user input
LinearLayout lay=new LinearLayout(this);
lay.setOrientation(LinearLayout.VERTICAL);
final EditText no_pas = new EditText(this);
no_pas.setHint("Nomor Pasien");
lay.addView(no_pas);
alert.setView(lay);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
if(no_pasien==null)
no_pasien = no_pas.getText().toString();
new LoginProses().execute();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
finish();
}
});
alert.show();
}catch (Exception e) {
// TODO: handle exception
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setCancelable(false);
//AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Login");
alert.setMessage("Masukkan Data Anda");
// Set an EditText view to get user input
LinearLayout lay=new LinearLayout(this);
lay.setOrientation(LinearLayout.VERTICAL);
final EditText no_pas = new EditText(this);
no_pas.setHint("Nomor Pasien");
lay.addView(no_pas);
alert.setView(lay);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
no_pasien = no_pas.getText().toString();
new LoginProses().execute();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
finish();
}
});
alert.show();
}
}
class LoginProses extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Checking..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
String no = no_pasien;
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("no_pasien", no));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_login,
"POST", params);
// check log cat fro response
//Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
Intent goMainAct = new Intent();
goMainAct.setClass(Login.this, MainActivity.class);
finish();
startActivity(goMainAct);
} else {
// failed to create product
Intent getReload = getIntent();
getReload.putExtra("status", 1);
finish();
startActivity(getReload);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
----UPDATE ERROR LOG-----这是错误日志..
06-24 05:28:36.257: E/WindowManager(12036): Activity com.iteadstudio.Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4179ce28 that was originally added here
06-24 05:28:36.257: E/WindowManager(12036): android.view.WindowLeaked: Activity com.iteadstudio.Login has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4179ce28 that was originally added here
06-24 05:28:36.257: E/WindowManager(12036): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:344)
06-24 05:28:36.257: E/WindowManager(12036): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:267)
06-24 05:28:36.257: E/WindowManager(12036): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215)
06-24 05:28:36.257: E/WindowManager(12036): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140)
06-24 05:28:36.257: E/WindowManager(12036): at android.view.Window$LocalWindowManager.addView(Window.java:537)
06-24 05:28:36.257: E/WindowManager(12036): at android.app.Dialog.show(Dialog.java:278)
06-24 05:28:36.257: E/WindowManager(12036): at com.iteadstudio.Login$LoginProses.onPreExecute(Login.java:122)
06-24 05:28:36.257: E/WindowManager(12036): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:561)
06-24 05:28:36.257: E/WindowManager(12036): at android.os.AsyncTask.execute(AsyncTask.java:511)
06-24 05:28:36.257: E/WindowManager(12036): at com.iteadstudio.Login$1.onClick(Login.java:67)
06-24 05:28:36.257: E/WindowManager(12036): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
06-24 05:28:36.257: E/WindowManager(12036): at android.os.Handler.dispatchMessage(Handler.java:99)
06-24 05:28:36.257: E/WindowManager(12036): at android.os.Looper.loop(Looper.java:137)
06-24 05:28:36.257: E/WindowManager(12036): at android.app.ActivityThread.main(ActivityThread.java:4441)
06-24 05:28:36.257: E/WindowManager(12036): at java.lang.reflect.Method.invokeNative(Native Method)
06-24 05:28:36.257: E/WindowManager(12036): at java.lang.reflect.Method.invoke(Method.java:511)
06-24 05:28:36.257: E/WindowManager(12036): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
06-24 05:28:36.257: E/WindowManager(12036): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
06-24 05:28:36.257: E/WindowManager(12036): at dalvik.system.NativeStart.main(Native Method)
06-24 05:28:36.257: D/AndroidRuntime(12036): Shutting down VM
06-24 05:28:36.257: W/dalvikvm(12036): threadid=1: thread exiting with uncaught exception (group=0x40aae210)
06-24 05:28:36.267: E/AndroidRuntime(12036): FATAL EXCEPTION: main
06-24 05:28:36.267: E/AndroidRuntime(12036): java.lang.IllegalArgumentException: View not attached to window manager
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:587)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:324)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.view.WindowManagerImpl$CompatModeWrapper.removeView(WindowManagerImpl.java:151)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.app.Dialog.dismissDialog(Dialog.java:321)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.app.Dialog$1.run(Dialog.java:119)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.app.Dialog.dismiss(Dialog.java:306)
06-24 05:28:36.267: E/AndroidRuntime(12036): at com.iteadstudio.Login$LoginProses.onPostExecute(Login.java:177)
06-24 05:28:36.267: E/AndroidRuntime(12036): at com.iteadstudio.Login$LoginProses.onPostExecute(Login.java:1)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.os.AsyncTask.finish(AsyncTask.java:602)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.os.AsyncTask.access$600(AsyncTask.java:156)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.os.Handler.dispatchMessage(Handler.java:99)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.os.Looper.loop(Looper.java:137)
06-24 05:28:36.267: E/AndroidRuntime(12036): at android.app.ActivityThread.main(ActivityThread.java:4441)
06-24 05:28:36.267: E/AndroidRuntime(12036): at java.lang.reflect.Method.invokeNative(Native Method)
06-24 05:28:36.267: E/AndroidRuntime(12036): at
java.lang.reflect.Method.invoke(Method.java:511)
06-24 05:28:36.267: E/AndroidRuntime(12036): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
06-24 05:28:36.267: E/AndroidRuntime(12036): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
06-24 05:28:36.267: E/AndroidRuntime(12036): at dalvik.system.NativeStart.main(Native Method)
登录.java
class LoginProses extends AsyncTask<String, String, String> { //line 110
protected void onPreExecute() {..} //line 117
protected String doInBackground(String... args) {...} //line 128
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss(); // line 177
}