Develop Reference

Android custom browser open twice activity everytime

I tried to create this small custom browser, but I have a small problem, when I click on a link, it opens it quietly, but first I open a blank page, as if it were a new instance of the activity. In fact when I try to go back from the open link, I go about the activity with the blank page. It does not change page, but the activity. What am I doing wrong?
ACTIVITY:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String url = "";
if (getIntent().getData() != null) {
setContentView(R.layout.activity_main);
url = getIntent().getData().toString();
WebView wv = (WebView) findViewById(R.id.webView);
WebSettings settings = wv.getSettings();
settings.setDomStorageEnabled(true);
wv.clearCache(true);
wv.clearHistory();
settings.setJavaScriptEnabled(true);
settings.setLoadsImagesAutomatically(true);
settings.setJavaScriptCanOpenWindowsAutomatically(true);
wv.setWebChromeClient(new WebChromeClient());
wv.loadUrl(url);
}
}
}
LAYOUT:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.andrea.webviewsample.MainActivity">
<WebView
android:id="#+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
MANIFEST:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.andrea.webviewsample">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<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"
android:launchMode="singleTask">
<activity
android:name=".MainActivity"
android:theme="#style/Theme.AppCompat.NoActionBar">
<intent-filter>
<data android:scheme="http" />
<data android:scheme="https" />
<data android:host="*" />
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.APP_BROWSER" />
<action android:name="android.intent.action.VIEW" />
</intent-filter>
</activity>
</application>
</manifest>
THIS IS THE RESULT:

Solution found!
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String url = "";
if (getIntent().getData() != null) {
WebView wv = new WebView(this);
url = getIntent().getData().toString();
WebSettings settings = wv.getSettings();
settings.setDomStorageEnabled(true);
wv.clearCache(true);
wv.clearHistory();
settings.setJavaScriptEnabled(true);
settings.setLoadsImagesAutomatically(true);
settings.setJavaScriptCanOpenWindowsAutomatically(true);
wv.setWebViewClient(new WebViewClient(){
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return false;
}
});
wv.loadUrl(url);
setContentView(wv);
}
}

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

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>

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.

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();
}

Android layout can not display in device

My Android Studio version is 1.5.1
I have created an XML and it can show well in the AndroidStudio,
but when i run it in genymotion or my phone,it can not show the layout.
I am annoyed at this.I do not know what is wrong.
hope someone could help me.
code image
code:
SplashActivity
import android.content.Intent;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class SplashActivity extends AppCompatActivity {
private Button mEnterButton;
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.enter_button:
Intent intent = new Intent(SplashActivity.this, MainActivity.class);
startActivity(intent);
break;
}
}
};
#Override
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
setContentView(R.layout.activity_splash);
mEnterButton = (Button) findViewById(R.id.enter_button);
mEnterButton.setOnClickListener(mOnClickListener);
}
}
MainActivity
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.button_first).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent=new Intent(MainActivity.this,SplashActivity.class);
startActivity(intent);
}
});
}
}
avtivity_splash_layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:background="#color/splashBackground">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/splash_tv_text"
android:textSize="28sp"
android:id="#+id/text_splash"
android:textColor="#color/white"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/splash_click_to_inter"
android:id="#+id/enter_button"/>
</LinearLayout>
Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="com.geekband.geekbandprojects">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme" >
<activity android:name=".MainActivity" >
</activity>
<activity android:name=".SplashActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

Why you need a PersistableBundle ?
make your OnCreateMethod like:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//anything here
}

i'm considering that you haven't already set the SplashActivity as the startup activity.So add the following code(or change it) on Manifest:
<activity
android:name=".Splash"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity"/>
And let us know your MainActivity code and of course your Manifest with the logcat.
I will updated my answer after that.
And of course, i think you should use onClick on Oncreate method.

How do they load a url inside a webview instead of androids internal browser?

I'm trying to achieve this: MKyong - WebView.
To get a hint at what exactly, then take a look at the last picture before "Download Source Code".
My applications code is:
bookingView = (WebView) findViewById(R.id.fullscreen_content);
bookingView.getSettings().setJavaScriptEnabled(true);
bookingView.loadUrl("http://www.google.com");
But what that code does is opening the url(in this case Google) inside the default browser/internal browser in android and it's not meant to be that in the android application I am making.
Any ideas?

Add this line before the loadUrl() call
bookingView.setWebViewClient(new WebViewClient());

This is the answer:
Features
Load a URL on WebView
Open another page in the website on Webview dont on local Browser.
If you press on backbutton will go to the before page dont out of app.
MainActivity.java
public class MainActivity extends AppCompatActivity {
WebView webview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webview = (WebView)findViewById(R.id.webview);
webView();
}
//Metodo llamar el webview
private void webView(){
//Habilitar JavaScript (Videos youtube)
webview.getSettings().setJavaScriptEnabled(true);
//Handling Page Navigation
webview.setWebViewClient(new MyWebViewClient());
//Load a URL on WebView
webview.loadUrl("http://stackoverflow.com/");
}
// Metodo Navigating web page history
#Override public void onBackPressed() {
if(webview.canGoBack()) {
webview.goBack();
} else {
super.onBackPressed();
}
}
// Subclase WebViewClient() para Handling Page Navigation
private class MyWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("stackoverflow.com")) { //Force to open the url in WEBVIEW
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<WebView android:id="#+id/webview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
Include this in AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.webview" >
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
RESULT
START PAGE
ANOTHER PAGE IN THE WEBSITE ON WEBVIEW

how to mopub ads add in application

i want to add ads banner in my application i have integrate mopub sdk with my project and import and add library to the my project now my question is how to add banner disply and where code i have to write in my application java code and xml code about ads so please help enyone
my java code and mainifest file code is given below
mainactivity.java
package com.example.ration;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class MainActivity extends Activity {
private WebView web;
int k;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
web=(WebView)findViewById(R.id.web);
web.getSettings().setJavaScriptEnabled(true);
web.setWebViewClient(new WebViewClient());
web.getSettings().setBuiltInZoomControls(true);
web.loadUrl("http://dcs-dof.gujarat.gov.in/live-info.htm");
// web.getProgress();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0,1,menu.NONE,"About");
menu.add(0,2,menu.NONE,"Feedback");
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id=item.getItemId();
if(id == 1)
{
Toast.makeText(MainActivity.this,"About",Toast.LENGTH_LONG).show();
Intent i=new Intent(MainActivity.this,about.class);
startActivity(i);
}
else {
Toast.makeText(MainActivity.this,"Feedback",Toast.LENGTH_LONG).show();
Intent i2 =new Intent(MainActivity.this,feedback.class);
startActivity(i2);
}
return super.onOptionsItemSelected(item);
}
private boolean doubleBackToExitPressedOnce = false;
#Override
protected void onResume() {
super.onResume();
// .... other stuff in my onResume ....
this.doubleBackToExitPressedOnce = false;
}
#Override
public void onBackPressed() {
if (doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
this.doubleBackToExitPressedOnce = true;
Toast.makeText(this,"Press Again to Exit", Toast.LENGTH_SHORT).show();
}
}
and my manifest file is
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ration"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="#drawable/icon"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.ration.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.example.ration.about"></activity>
<activity android:name="com.example.ration.feedback"></activity>
<activity android:name="com.mopub.mobileads.MoPubActivity" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.mopub.mobileads.MraidActivity" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.mopub.mobileads.MraidBrowser" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.mopub.mobileads.MraidVideoPlayerActivity" android:configChanges="keyboardHidden|orientation"/>
<activity android:name="com.google.ads.AdActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
<activity android:name="com.millennialmedia.android.MMActivity" android:theme="#android:style/Theme.Translucent.NoTitleBar" android:configChanges="keyboardHidden|orientation|keyboard" />
<activity android:name="com.millennialmedia.android.VideoPlayer" android:configChanges="keyboardHidden|orientation|keyboard" />
</application>
</manifest>

I think you should better go through the guide for Mopub Banner Ads Integration which explains you the steps of banner ads integration.
Hope this will help you.

Use view in XML file
<com.mopub.mobileads.MoPubView
android:id="#+id/mrect_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_weight="1" />
in activity Load code
pass id of view in below function ,unit id of ur app,and keywords of cataogry of ads
public void loadMoPubView(MoPubView moPubView, String adUnitId, String keywords) {
if (moPubView == null) {
Utils.logToast(LockScreenActivity.this, "Unable to inflate MoPubView from xml.");
//Toast.makeText(this, "Unable to inflate MoPubView from xml.", Toast.LENGTH_SHORT).show();
return;
}
try {
Utils.validateAdUnitId(adUnitId);
} catch (IllegalArgumentException exception) {
Utils.logToast(LockScreenActivity.this, exception.getMessage());
return;
}
moPubView.setBannerAdListener(this);
moPubView.setAdUnitId(adUnitId);
moPubView.setKeywords(keywords);
moPubView.setAutorefreshEnabled(true);
moPubView.loadAd();
}