Android app for a responsive web site crashes on load up on real phone

Question

This is my first attempt at Android coding. We have a responsive web site and I call myself writing the code for an android app so that people and simply click on the icon after downloading the app and hit our website. On the Simulator, the app works fine on the various test phone, but when I upload APK for distribution and someone downloads and tries to run it, it crashes even before the splash screen is seen. Can some one please look at my code and tell me what's wrong. It seems to only crash on Android software version 6.0 or higher. On the old phones and tablets it run fine. Here are copies of my "SplashScreenActivity.java, my MainActivity.java, and my AndroidManifest.xml from Android Studios version 3.2.1. Any help would be appreciated.

SplashScreenActivity.java

    package com.wastefreemail.wfmconnect;
    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.Window;
    import android.view.WindowManager;
    public class SplashScreenActivity extends AppCompatActivity {

    private int SLEEP_TIMER = 3;

    @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_splash_screen);
        getSupportActionBar().hide();


        LogoLauncher logoLauncher = new LogoLauncher();
        logoLauncher.start();


    }

    private class LogoLauncher extends Thread{
      public void run(){
          try{
              sleep(1000 * SLEEP_TIMER);
          }catch(InterruptedException e){
              e.printStackTrace();

          }

          Intent intent = new Intent(SplashScreenActivity.this,         MainActivity.class);
          startActivity(intent);
          SplashScreenActivity.this.finish();
      }
    }
}

MainActivit.java

    package com.wastefreemail.wfmconnect;


    import android.app.Activity;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.Window;
    import android.view.WindowManager;
    import android.webkit.WebSettings;
    import android.webkit.WebView;
    import android.webkit.WebViewClient;



    public class MainActivity extends Activity {

    public WebView web1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);

        WebView web1 = (WebView)findViewById(R.id.web1);
        WebSettings webSettings = web1.getSettings();
        webSettings.setJavaScriptEnabled(true);
        web1.loadUrl("https://www.wastefreemail.com");
        web1.setWebViewClient(new WebViewClient());
    }
 }

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wastefreemail.wfmconnect">

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">

    </activity>
    <activity android:name=".SplashScreenActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

Answer 1

try this,

manifest file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.chetan.testapp">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

MainActivity.java

package com.wastefreemail.wfmconnect;



   import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;



public class MainActivity extends Activity {

    public WebView web1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       // requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);

        web1 = (WebView)findViewById(R.id.webView);
        WebSettings webSettings = web1.getSettings();
        webSettings.setJavaScriptEnabled(true);
        web1.loadUrl("http://www.wastefreemail.com/");
        web1.setWebViewClient(new WebViewClient());
    }
}

xml

<WebView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/webView"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

Hope it's help full.

Answer 2

Looks like there may be a problem in your splashscreen activity. Try below code and let me know for further updates.

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

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {

            Intent intent = new Intent(SplashScreenActivity.this,MainActivity.class);
            startActivity(intent);
            finish();
        }
    },5000); //here 5000 represents 5 seconds. Change this according to your need.
}

Edit

If even that doesn't work then make a new style in your styles.xml file.

<style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>

And apply this style to your activity in your manifest.xml file.

<activity
    android:name=".SplashScreenActivity"
    android:theme="@style/AppTheme.NoActionBar" />

EDIT

That SupportActionBar method is throwing a Null Pointer exception. Use this code in your splash activity. It will resolve the issue.

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_splash_screen);
    try{
        getSupportActionBar().hide();
    } catch (NullPointerException e){
        e.printStackTrace();
    }