Question

我不知道错误在哪里...
我试着调试它，但错误不断出现。

 public class ActivityOwner extends Activity implements OnClickListener {

        private ProgressDialog progressDialog;
        private Button btnLogin;
        private EditText username, password;
        private TextView tvLinkToRegister;

        JSONParser jsonParser = new JSONParser(); //---JSON parser class

        //---Testing on android device:
        private static final String OWNER_LOGIN_URL = "http://192.168.2.5/idot/owner_login.php";

        //---Testing on Emulator:
        //private static final String REGISTER_URL = "http://10.0.2.2:1234/idot/register.php";
        //---Testing from a real server:
        //Private static final String REGISTER_URL = "http://domain name/sub folder/register.php";

        private static final String TAG_SUCCESS = "success";
        private static final String TAG_MESSAGE = "message";

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

            username = (EditText) findViewById(R.id.etOwnerUsername);
            password = (EditText) findViewById(R.id.etOwnerPassword);

            tvLinkToRegister = (TextView) findViewById(R.id.link_to_register);
            btnLogin = (Button) findViewById(R.id.btnOwnerLogin);

            tvLinkToRegister.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View view) {
                    // TODO Auto-generated method stub
   Intent registrationForm = new Intent(ActivityOwner.this, ActivityOwnerRegister.class);
                    startActivity(registrationForm);
                }
            });

            btnLogin.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            new AttemptLogin().execute();
        }

        class AttemptLogin extends AsyncTask<String, String, String> {

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                progressDialog = new ProgressDialog(ActivityOwner.this);
                progressDialog.setMessage("Attempting login...");
                progressDialog.setIndeterminate(false);
                progressDialog.setCancelable(true);
                progressDialog.show();
            }

            @Override
            protected String doInBackground(String... args) {
                // TODO Auto-generated method stub
                // Check for success tag
                int success;
                String stringUsername = username.getText().toString();
                String stringPassword = password.getText().toString();
                try {
                    // Building Parameters
                    List<NameValuePair> params = new ArrayList<NameValuePair>();
                    params.add(new BasicNameValuePair("owner_username", stringUsername));
                    params.add(new BasicNameValuePair("owner_password", stringPassword));

                    Log.d("request!", "starting");
                    // getting product details by making HTTP request
                    JSONObject json = jsonParser.makeHttpRequest(OWNER_LOGIN_URL, "POST", params);

                    // check your log for json response
                    Log.d("Login attempt", json.toString());

                    // json success tag
                    success = json.getInt(TAG_SUCCESS);
                    if (success == 1) {
                        Log.d("Login Successful!", json.toString());
                        // save user data
                        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(ActivityOwner.this);
                        Editor edit = sp.edit();
                        edit.putString("owner_username", stringUsername);
                        edit.commit();

                        Intent i = new Intent(ActivityOwner.this, ActivityOwnerSuccessLogin.class);
                        //progressDialog.dismiss();
                        finish();
                        startActivity(i);

                        return json.getString(TAG_MESSAGE);

                    } else {
                        Log.d("Login Failure!", json.getString(TAG_MESSAGE));
                        return json.getString(TAG_MESSAGE);
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }

                return null;

            }

            @Override
            protected void onPostExecute(String file_url) {
                // dismiss the dialog once product deleted
                progressDialog.dismiss();
                if (file_url != null) {
                    Toast.makeText(ActivityOwner.this, file_url, Toast.LENGTH_LONG).show();
                }

            }

        }

-LOGCAT -------

11-14 14:37:14.460: E/WindowManager(11609): Activity ph.idot.sp.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4101cf78 that was originally added here
11-14 14:37:14.460: E/WindowManager(11609): android.view.WindowLeaked: Activity ph.idot.sp.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4101cf78 that was originally added here
11-14 14:37:14.460: E/WindowManager(11609):     at android.view.ViewRootImpl.<init>(ViewRootImpl.java:349)
11-14 14:37:14.460: E/WindowManager(11609):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:267)
11-14 14:37:14.460: E/WindowManager(11609):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215)
11-14 14:37:14.460: E/WindowManager(11609):     at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140)
11-14 14:37:14.460: E/WindowManager(11609):     at android.view.Window$LocalWindowManager.addView(Window.java:537)
11-14 14:37:14.460: E/WindowManager(11609):     at android.app.Dialog.show(Dialog.java:285)
11-14 14:37:14.460: E/WindowManager(11609):     at ph.idot.owner.ActivityOwner$AttemptLogin.onPreExecute(ActivityOwner.java:88)
11-14 14:37:14.460: E/WindowManager(11609):     at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:561)
11-14 14:37:14.460: E/WindowManager(11609):     at android.os.AsyncTask.execute(AsyncTask.java:511)
11-14 14:37:14.460: E/WindowManager(11609):     at ph.idot.owner.ActivityOwner.onClick(ActivityOwner.java:76)
11-14 14:37:14.460: E/WindowManager(11609):     at android.view.View.performClick(View.java:3511)
11-14 14:37:14.460: E/WindowManager(11609):     at android.view.View$PerformClick.run(View.java:14109)
11-14 14:37:14.460: E/WindowManager(11609):     at android.os.Handler.handleCallback(Handler.java:605)
11-14 14:37:14.460: E/WindowManager(11609):     at android.os.Handler.dispatchMessage(Handler.java:92)
11-14 14:37:14.460: E/WindowManager(11609):     at android.os.Looper.loop(Looper.java:137)
11-14 14:37:14.460: E/WindowManager(11609):     at android.app.ActivityThread.main(ActivityThread.java:4424)
11-14 14:37:14.460: E/WindowManager(11609):     at java.lang.reflect.Method.invokeNative(Native Method)
11-14 14:37:14.460: E/WindowManager(11609):     at java.lang.reflect.Method.invoke(Method.java:511)
11-14 14:37:14.460: E/WindowManager(11609):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
11-14 14:37:14.460: E/WindowManager(11609):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
11-14 14:37:14.460: E/WindowManager(11609):     at dalvik.system.NativeStart.main(Native Method)

这里有什么问题？请帮帮我。

Answer 1

泄漏窗口当视图无法找到启动或初始化的上下文时，通常会出现错误。

在开始新活动之前首先关闭进度对话框。当您的新活动开始时，您的上一个活动对话框未找到相同的上下文。因此，请在onpause方法或destroy方法中编写对话框dismiss代码。

在这里您正在使用doinbackground方法启动活动并在postexecute中完成对话框，这会导致泄漏窗口错误。

试试这个：

@Override
        protected void onPostExecute(String file_url) {
            // dismiss the dialog once product deleted
             if(success==1){     
                      if (progressDialog != null) {
                          if (progressDialog.isShowing()) {
                                 progressDialog.dismiss();
                          }
                            //Start your activity here . . . .  

                          }
                     }
                if (file_url != null) {
                Toast.makeText(ActivityOwner.this, file_url, Toast.LENGTH_LONG).show();
            }

        }

Answer 2

您要在关闭对话框之前完成活动。试试这个。

@Override
protected void onDestroy() {
   if (progressDialog != null) {
      if (progressDialog.isShowing()) {
          progressDialog.dismiss();
      }
   }
  super.onDestroy();
}

Answer 3

你正在doInBackground中开始新的意图在开始新活动之前，您需要关闭ProgressDialog

我更喜欢这段代码来解雇ProgressDialog。 pd是以下代码中的ProgressDialog

    @Override
public void startActivity(Intent intent) {
    if(pd!=null && pd.isShowing()){
        pd.dismiss();
    }
    super.startActivity(intent);
}

Answer 4

public class ActivityOwner extends Activity implements OnClickListener {

    private ProgressDialog progressDialog;
    private Button btnLogin;
    private EditText username, password;
    private TextView tvLinkToRegister;

    JSONParser jsonParser = new JSONParser(); //---JSON parser class

    //---Testing on android device:
    private static final String OWNER_LOGIN_URL = "http://192.168.2.5/idot/owner_login.php";

    //---Testing on Emulator:
    //private static final String REGISTER_URL = "http://10.0.2.2:1234/idot/register.php";
    //---Testing from a real server:
    //Private static final String REGISTER_URL = "http://domain name/sub folder/register.php";

    private static final String TAG_SUCCESS = "success";
    private static final String TAG_MESSAGE = "message";

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

        username = (EditText) findViewById(R.id.etOwnerUsername);
        password = (EditText) findViewById(R.id.etOwnerPassword);

        tvLinkToRegister = (TextView) findViewById(R.id.link_to_register);
        btnLogin = (Button) findViewById(R.id.btnOwnerLogin);

        tvLinkToRegister.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                // TODO Auto-generated method stub
   Intent registrationForm = new Intent(ActivityOwner.this, ActivityOwnerRegister.class);
                startActivity(registrationForm);
            }
        });

        btnLogin.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        new AttemptLogin().execute();
    }

    class AttemptLogin extends AsyncTask<String, String, String> {

     int success;
            String stringUsername = username.getText().toString();
            String stringPassword = password.getText().toString();

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressDialog = new ProgressDialog(ActivityOwner.this);
            progressDialog.setMessage("Attempting login...");
            progressDialog.setIndeterminate(false);
            progressDialog.setCancelable(true);
            progressDialog.show();
        }

        @Override
        protected String doInBackground(String... args) {
            // TODO Auto-generated method stub
            // Check for success tag

            try {
                // Building Parameters
                List<NameValuePair> params = new ArrayList<NameValuePair>();
                params.add(new BasicNameValuePair("owner_username", stringUsername));
                params.add(new BasicNameValuePair("owner_password", stringPassword));

                Log.d("request!", "starting");
                // getting product details by making HTTP request
                JSONObject json = jsonParser.makeHttpRequest(OWNER_LOGIN_URL, "POST", params);

                // check your log for json response
                Log.d("Login attempt", json.toString());

                // json success tag
                success = json.getInt(TAG_SUCCESS);

                    return json.getString(TAG_MESSAGE);

                } else {
                    Log.d("Login Failure!", json.getString(TAG_MESSAGE));
                    return json.getString(TAG_MESSAGE);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;

        }

        @Override
        protected void onPostExecute(String file_url) {
            // dismiss the dialog once product deleted
            progressDialog.dismiss();
            if (file_url != null) {
                Toast.makeText(ActivityOwner.this, file_url, Toast.LENGTH_LONG).show();


    if (success == 1) {
                    Log.d("Login Successful!", json.toString());
                    // save user data
                    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(ActivityOwner.this);
                    Editor edit = sp.edit();
                    edit.putString("owner_username", stringUsername);
                    edit.commit();

                    Intent i = new Intent(ActivityOwner.this, ActivityOwnerSuccessLogin.class);
                    startActivity(i);
                    finish();


            }

        }

    }

泄露的窗口com.internal.policy.impl.PhoneWindow $ DecorView

4 个答案: