Android app slow at startup time

Question

When the app starts the first time, it's slow. It takes about 5 seconds staring at a white screen before the main screen shows. After that the app works fine and quick. I don't know why my app is slow at startup I try to clean the onCreate() and put most code in onStart() this my code:

public class MainActivity extends AppCompatActivity {
private WebView webView;
private  ImageView image ;
private ProgressBar loading;
private TextView textView;
private AdView mAdView;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    image = (ImageView) findViewById(R.id.image);
    webView = (WebView) findViewById(R.id.webview);
    loading = (ProgressBar) findViewById(R.id.progressBar);
    textView = (TextView) findViewById(R.id.textView);
    mAdView = (AdView) findViewById(R.id.adView);




    AdRequest request = new AdRequest.Builder()
            .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)        // All emulators
            .addTestDevice("00927A7823BCD302CE6574744C8B07DB")  // An example device ID
            .build();

    mAdView.loadAd(request);




    loading.setMax(100);


    //loading.setVisibility(View.VISIBLE);
}

@Override
protected void onStart() {
    super.onStart();

    if(isNetworkAvailable() == false){

        Toast.makeText(MainActivity.this,"no internet connection",Toast.LENGTH_LONG).show();

    }else {

        webView.setWebViewClient(new HelpClient());

        webView.setWebChromeClient(new WebChromeClient() {

            public void onProgressChanged(WebView view, int progress) {

                loading.setVisibility(View.VISIBLE);

                textView.setText(progress + "%");
                loading.setProgress(progress);

                if (progress == 100) {

                   // ++++++++++++++++++++++++++++++++++++++++

                    //gone the progressBar
                    loading.setVisibility(View.GONE);
                    //gone the first logo
                    image.setVisibility(View.GONE);




                    //show webview
                    webView.setVisibility(View.VISIBLE);
                }
                super.onProgressChanged(view, progress);


            }


        });


        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)

        {
            // chromium, enable hardware acceleration
            webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
        } else

        {
            // older android version, disable hardware acceleration
            webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
        }
        webView.getSettings().setCacheMode(webSettings.LOAD_CACHE_ELSE_NETWORK);
        webView.getSettings().setAppCacheEnabled(true);
        webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        //webView.getSettings().setLoadWithOverviewMode(true);
        //webView.getSettings().setUseWideViewPort(true);
        //webView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);
        webSettings.setDomStorageEnabled(true);
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
        webSettings.setUseWideViewPort(true);
        webSettings.setSaveFormData(true);
        webSettings.setEnableSmoothTransition(true);







        webView.loadUrl("********");


        loading.setProgress(0);


    }


}




@Override
public void onBackPressed() {
    if (webView.canGoBack()) {
        webView.goBack();
    } else {
        super.onBackPressed();
    }
}

private class HelpClient extends WebViewClient {

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        loading.setVisibility(View.VISIBLE);
        image.setVisibility(View.VISIBLE);
        return true;
    }
}
private boolean isNetworkAvailable() {
    ConnectivityManager connectivityManager
            = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}

}

You're loading a web page and ads. Why do you think it should be faster? — OneCricketeer, May 20 '17 at 06:57
@cricket_007 yeah but before i put the ads it take time to load — hackour, May 20 '17 at 07:01
Hi hackout, I suggest adding some log in onStart() field and check witch code coat so much time :) — Rust Fisher, May 20 '17 at 07:19
@hackour Em... Like this: add `Log.d(TAG, "onStart: " + System.currentTimeMillis());` before and below `webView.setWebChromeClient(..)` or other code — Rust Fisher, May 20 '17 at 07:25
@RustFisher onStart:: 1495265557410 onStart:: 1495265574030 above chromeclient:: 1495265557618 above chromeclient:: 1495265574053 below chromeclient:: 1495265557638 below chromeclient:: 1495265574088 — hackour, May 20 '17 at 07:36
Hi @hackour I sort the log by time and see the first network request cost too much time. So I suggest doing the network asynchronously. Try thread or AsyncTask. — Rust Fisher, May 20 '17 at 15:08

score 0 · Answer 1 · answered May 20 '17 at 08:20

0

Actually you are loading a url in webview. So it will be always slow in your mobile application.

If you want to fast execution of your app, the only way to design your own layout and handle your data through JSON.

answered May 20 '17 at 08:20

the problem is the website not for me – hackour May 20 '17 at 09:01
mean i don't have JSON – hackour May 20 '17 at 12:38
You have already tried to possible ways to make it fast.here is a ref.,may be it helpful to you. http://stackoverflow.com/questions/7422427/android-webview-slow – May 20 '17 at 12:58

Android app slow at startup time

1 Answers1