Question

我有两个Activities名为LoginActivity和RegistrationActivity。我使用RegistrationActivity点击按钮，从LoginActivity开始Intent。但问题是加载RegistrationActivity的延迟2到3秒。可能是什么问题？

LoginActivity：

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_login);
        setup();
    }

    private void setup() {
        layout = (RelativeLayout) findViewById(R.id.loginLayout);
        register = (Button) findViewById(R.id.registerText);
        email = (AppCompatEditText) findViewById(R.id.loginEmail);
        password = (AppCompatEditText) findViewById(R.id.loginPassword);
        submit = (Button) findViewById(R.id.loginSubmit);
        submit.setOnClickListener(listener);

        register.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(LoginActivity.this, RegistrationActivity.class);
                ActivityOptionsCompat options = ActivityOptionsCompat.makeScaleUpAnimation(view, 0, 0, view.getWidth(), view.getHeight());
                ActivityCompat.startActivity(LoginActivity.this,
                        intent, options.toBundle());
            }
        });
    }

RegistrationActivity：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_registration);
}

@Override
protected void onStart() {
    super.onStart();
    setup();
    new getLatLongAsync().execute();
}

private class getLatLongAsync extends AsyncTask<String, Void, String> {

    @Override
    protected void onPreExecute() {

    }

    @Override
    protected String doInBackground(String... args) {


        mGoogleApiClient = new GoogleApiClient.Builder(RegistrationActivity.this)
                // The next two lines tell the new client that “this” current class will handle connection stuff
                .addConnectionCallbacks(RegistrationActivity.this)
                .addOnConnectionFailedListener(RegistrationActivity.this)
                //fourth line adds the LocationServices API endpoint from GooglePlayServices
                .addApi(LocationServices.API)
                .build();

        mLocationRequest = LocationRequest.create()
                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
                .setInterval(10 * 1000)        // 10 seconds, in milliseconds
                .setFastestInterval(1000); // 1 second, in milliseconds

        return null;
    }

    protected void onPostExecute(String args) {
        mGoogleApiClient.connect();
    }
}

getLatLong()获取纬度和经度：

private void getLatLong() {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                // The next two lines tell the new client that “this” current class will handle connection stuff
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                //fourth line adds the LocationServices API endpoint from GooglePlayServices
                .addApi(LocationServices.API)
                .build();

        mLocationRequest = LocationRequest.create()
                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
                .setInterval(10 * 1000)        // 10 seconds, in milliseconds
                .setFastestInterval(1000); // 1 second, in milliseconds
    }

Answer 1

实际上你正试图在onCreate方法上加载很多东西。由于您的活动需要时间来创作。

关注activity life cycle

对于你的案例，将所有setup()和你的asyntask放在onStart或任何其他适当的方法上。

非常感谢你。

Answer 2

RegistrationActivity：更新代码

    @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
            setContentView(R.layout.activity_registration);
            setup();
            //calling asynctask..
            new getLatLongAsync().execute();
        }

        private void setup() {
            layout = (RelativeLayout) findViewById(R.id.registerLayout);
            language = (Spinner) findViewById(R.id.lang);
            email = (EditText) findViewById(R.id.regEmail);
            password = (EditText) findViewById(R.id.regPassword);
            nickname = (EditText) findViewById(R.id.regNickname);
            username = (EditText) findViewById(R.id.regUsername);
            dob = (EditText) findViewById(R.id.regDOB);
            submit = (Button) findViewById(R.id.regSubmit);
            prefs = new SecurePreferences(this);
            progressDialog = new ProgressDialog(this);
            progressDialog.setMessage("Loading....");
            language.setOnItemSelectedListener(listener);
            submit.setOnClickListener(onClickListener);

            languages = new ArrayList<>();
            languages.add("Select Language");
            languages.add("English");
            languages.add("Tamil");
            languages.add("Malayalam");

            adapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, languages);
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            language.setAdapter(adapter);
        }


     class getLatLongAsync extends AsyncTask<String, Void, String> {

            @Override
            protected void onPreExecute() {

            }

            @Override
            protected String doInBackground(String... args) {


              getLatLong();


                return null;
            }

            protected void onPostExecute(String args) {
            }
        }

private void getLatLong() {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                // The next two lines tell the new client that “this” current class will handle connection stuff
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                //fourth line adds the LocationServices API endpoint from GooglePlayServices
                .addApi(LocationServices.API)
                .build();

        mLocationRequest = LocationRequest.create()
                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
                .setInterval(10 * 1000)        // 10 seconds, in milliseconds
                .setFastestInterval(1000); // 1 second, in milliseconds
    }

从另一个开始一个活动时延迟

2 个答案: