Develop Reference

adjusting dimensions of alert in android

I am making a basic app which has got an alert which would show up at the time the app is started. This alert has got a WebView in it and it covers almost the whole screen. Following are the questions I have in mind.
Now is it possible to adjust the dimensions of this alert ?
The url in the WebView in alert is set to 'http://www.google.com' let's say if some users are using my app and now I want them(users) to see a different webpage in the alert so how do I change the url without having them(users) update the app, how can I do it ?
MainActivity.java
package com.example.android.two;
import android.app.Dialog;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import com.example.android.two.R;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Dialog dialog = new Dialog(this);
WebView wv = new WebView(this);
wv.loadUrl("http:\\www.google.com");
wv.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Notification");
alert.setView(wv);
alert.setNegativeButton("Close", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
dialog.dismiss();
}
});
alert.show();
}
}

Yes, you can set dimensions for this alert dialog, by using custom layout for the Alert Dialog.
Please elaborate your second point.

You can use Custom Dialog Layout like this:
<?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="wrap_content"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal">
<Button
android:layout_width="60dp"
android:layout_height="match_parent"
android:text="GO"
android:id="#+id/go"/>
<EditText
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/urlText"/>
</LinearLayout>
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<WebView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/web">
</WebView>
</ScrollView>
</LinearLayout>
We will use WindowManager.LayoutParams to adjust the dimension or we can set the height and width for the linearLayout above.
The Activity Code will be:
import android.app.Dialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
WebView wv;
EditText url;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Dialog dialog = new Dialog(this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.custom_alert_dialog);
WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
lp.copyFrom(dialog.getWindow().getAttributes());
lp.width = WindowManager.LayoutParams.MATCH_PARENT;
lp.height = WindowManager.LayoutParams.MATCH_PARENT;
lp.gravity = Gravity.CENTER;
url=(EditText) dialog.findViewById(R.id.urlText);
wv=(WebView) dialog.findViewById(R.id.web);
wv.setWebViewClient(new MyBrowser());
wv.getSettings().setLoadsImagesAutomatically(true);
wv.getSettings().setJavaScriptEnabled(true);
wv.loadUrl("http://www.google.com");
Button go=(Button)dialog.findViewById(R.id.go);
go.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
wv.loadUrl("http://"+url.getText().toString());
}
});
dialog.getWindow().setAttributes(lp);
dialog.show();
}
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}
Hope it Helps.
Cheers!

Webview back button won't go back

Please Help
When you press the Back Button to get out of the application
I tried a lot of solutions, but did not succeed
I will put you code
MainActivity
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.app.Activity;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.TextView;
import android.view.View;
public class MainActivity extends Activity{
WebView webview;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.activity_main);
webview = (WebView) findViewById(R.id.webView);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setBuiltInZoomControls(false);
webview.getSettings().setLoadWithOverviewMode(true);
webview.getSettings().setUseWideViewPort(true);
webview.loadUrl("http://www.alrofaiy.com/");
webview.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
setProgress(progress * 100);
}
});
webview.setWebViewClient(new InsideWebViewClient());
}
#Override
public void onBackPressed() {
super.onBackPressed();
if(webview.canGoBack()){
webview.goBack();
}
}
private class InsideWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
switch (item.getItemId()){
case R.id.item1:
try {
Intent abb = new Intent(Intent.ACTION_SEND);
abb.setType("text/palin");
abb.putExtra(Intent.EXTRA_SUBJECT , "APP");
String aliwi = "/n /n/n";
aliwi = aliwi + "https:// /n/n";
abb.putExtra(Intent.EXTRA_TEXT, aliwi);
startActivity(Intent.createChooser(abb,""));
}
catch (Exception o)
{o.toString();}
return true;
case R.id.item2:
Intent AAA = new Intent(Intent.ACTION_VIEW, Uri.parse("mailto:info#alrofaiy.com?subhect= "));
startActivity(AAA);
return true;
case R.id.link1:
webview.loadUrl("http://www.alrofaiy.com/login_in");
return true;
}
return super.onOptionsItemSelected(item);
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity"
android:padding="0dp">
<WebView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:id="#+id/webView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:focusableInTouchMode="false"
android:padding="0dp"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="30dp"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="#string/text_call"
android:id="#+id/textView"
android:layout_alignParentBottom="true"
android:gravity="center"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignRight="#+id/webView"
android:layout_alignEnd="#+id/webView"
android:autoLink="phone"
android:clickable="true"
android:linksClickable="false"
android:textColor="#fff"
android:background="#000"
android:paddingTop="2dp" />
</RelativeLayout>
What's the solution?
When you run the application and view the site does go out when you press the back button

#Override
public void onBackPressed() {
super.onBackPressed();
if(webview.canGoBack()){
webview.goBack();
}
}
Should be
#Override
public void onBackPressed() {
if(webview.canGoBack()){
webview.goBack();
} else {
super.onBackPressed();
}
}

Android RuntimeException on setContentView

I am building an app for android, and while setting up my settingActivity and i get this error:
This happens when I start the activity. Before I moved the setContentView(R.layout.activity_setting); to the start of the onCreate() function, the application threw a NullPointerException at b.setOnCLickListener().
Now it throws a RuntimeException at the setContentView(); How do I resolve this?
01-18 14:28:59.116: E/AndroidRuntime(9463): java.lang.RuntimeException: Unable to start activity ComponentInfo{tk.yteditors.london2013/tk.yteditors.london2013.SettingActivity}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
01-18 14:28:59.116: E/AndroidRuntime(9463):
at tk.yteditors.london2013.SettingActivity.onCreate(SettingActivity.java:27)
Java code:
package tk.yteditors.london2013;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Random;
import android.annotation.TargetApi;
import android.app.Dialog;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class SettingActivity extends PreferenceActivity{
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setupActionBar();
setContentView(R.layout.activity_setting);
Button b = (Button) findViewById(R.id.sendAnswers);
b.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View pView) {
sendAnswers();
}
});
}
/**
* Set up the {#link android.app.ActionBar}, if the API is available.
*/
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void setupActionBar() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case R.id.MenuSettings:
//boo
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void sendAnswers(){
final Dialog dialog = new Dialog(this);
dialog.setContentView(R.layout.activity_confirm_dialog);
dialog.setTitle("Antwoorden verzenden?");
((Button) dialog.findViewById(R.id.dialogNo)).setOnClickListener(new OnClickListener(){
#Override
public void onClick(View arg0) {
dialog.dismiss();
}
});
((Button) dialog.findViewById(R.id.dialogYes)).setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
EditText edit = (EditText) dialog.findViewById(R.id.sendAnswers);
packHTML(edit.getText().toString());
}
});
}
public void packHTML(String name){
try {
String fileDir = "/sdcard/LondonAnswers";
File dir = new File(fileDir);
dir.mkdirs();
String fileName = name +new Random().nextLong() +".html";
File file = new File(dir, fileName);
FileWriter fw = new FileWriter(file, false);
fw.append("<html>\n");
fw.append("<head><title>" +name +"'s antwoorden</title></head>\n");
fw.append("<body>\n");
fw.append("<h1>" +name +"'s antwoorden</h1>\n");
fw.append("</body>\n");
fw.append("</html>");
fw.close();
Intent intent = new Intent(this, MainActivity.class);
intent.putExtra("webAdress", "file://" +fileDir +fileName);
startActivity(intent);
} catch (IOException e) {
Toast t = new Toast(this);
t.setText("Er is iets mis gegaan tijdens het maken van het bestand");
t.setDuration(Toast.LENGTH_SHORT);
t.show();
e.printStackTrace();
}
}
}
xml:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Antwoorden"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="#+id/sendAnswers"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Verzend antwoorden" />
<Button
android:id="#+id/removeAnswers"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Verwijder antwoorden" />
<Button
android:id="#+id/answersNYI"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="NYI" />
</LinearLayout>
</ScrollView>

PreferenceActivity is-a ListActivity, and a ListActivity requires a layout which has a ListView with id #android:id/list. This is also shown in the exception you posted:
Your content must have a ListView whose id attribute is 'android.R.id.list'
Now, it seems that your code doesn't appear to be that of a regular Android preferences activity. Therefore you should change the extends PreferencesActivity to just extends Activity.

Save state of edittext

I am making a simple app.
Here are the codes:
Main xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="#+id/goButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#drawable/layout1"
android:text="#string/go" />
<EditText
android:id="#+id/urlField"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_toLeftOf="#+id/goButton"
android:background="#drawable/layout1"
android:ems="10" android:inputType="textUri"
android:hint="#string/enter_school_name">
<requestFocus />
</EditText>
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="#+id/urlField" />
<WebView
android:id="#+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_below="#+id/progressBar" />
Main Java:
package com.nextgenintl.plusportals;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
#SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {
private WebView webView;
private EditText urlEditText;
private ProgressBar progress;
#Override
public void onBackPressed() {
if (webView.copyBackForwardList().getCurrentIndex() > 0) {
webView.goBack();
}
else {
// Your exit alert code, or alternatively line below to finish
super.onBackPressed(); // finishes activity
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
urlEditText = (EditText) findViewById(R.id.urlField);
webView = (WebView) findViewById(R.id.webView);
webView.setWebChromeClient(new MyWebViewClient());
progress = (ProgressBar) findViewById(R.id.progressBar);
progress.setMax(100);
Button openUrl = (Button) findViewById(R.id.goButton);
openUrl.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
String url = urlEditText.getText().toString();
String urlSchool = "https://www.plusportals.com/"+url;
urlSchool = urlSchool.replace(" ", "");
if (validateUrl(url)) {
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl(urlSchool);
MainActivity.this.progress.setProgress(0);
}
}
private boolean validateUrl(String url) {
return true;
}
});
}
private class MyWebViewClient extends WebChromeClient {
#Override
public void onProgressChanged(WebView view, int newProgress) {
MainActivity.this.setValue(newProgress);
super.onProgressChanged(view, newProgress);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void setValue(int progress) {
this.progress.setProgress(progress);
}
}
So, I want to save the user input - the school name, so you don't have to type it every single time. But I can't really figure it out - can you please help me??? Thanks if you post me the full java file.

You can use the following:
SharedPreferences sp = getSharedPreferences("your_prefs", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putString("clever_title", urlEditText.getText().toString());
editor.commit();
Then when you open your app the next time you can get:
SharedPreferences sp = getSharedPreferences("your_prefs", Activity.MODE_PRIVATE);
urlEditText.text(sp.getString("clever_title", null);

Android app in eclipse

i've searched for days but cant find an answer, perhaps you guys can help.
I'm creating an android app in eclipse, it all works just one thing is bugging me.
this is my main.java:
package com.test;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
public class Main extends Activity implements OnClickListener {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Add Click listeners for all buttons
View firstButton = findViewById(R.id.btn_rassen);
firstButton.setOnClickListener(this);
View secondButton = findViewById(R.id.button2);
secondButton.setOnClickListener(this);
}
// Process the button click events
#Override
public void onClick(View v) {
switch(v.getId()){
case R.id.btn_rassen:
Intent j = new Intent(this, Webscreen.class);
j.putExtra(com.test.Webscreen.URL,
"http://www.google.com/");
startActivity(j);
break;
case R.id.button2:
Intent k = new Intent(this, Webscreen.class);
k.putExtra(com.test.Webscreen.URL,
"http://notworkingurltotest.com");
startActivity(k);
break;
}
}
}
now when it calls the webview.java the page called shows up but not the buttons i created in the layout xml page. does anybody have any idea why this is?
your help is much appreciated!
ohw this is my webscreen.java
package com.test;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class Webscreen extends Activity {
public static final String URL = "";
private static final String TAG = "WebscreenClass";
private WebView webview;
private ProgressDialog progressDialog;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.webscreen);
this.getIntent().getExtras();
this.webview = (WebView) findViewById(R.string.webview);
String turl = getIntent().getStringExtra(URL);
Log.i(TAG, " URL = "+turl);
WebView webview = new WebView(this);
setContentView(webview);
final Activity activity = this;
webview.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
public void onLoadResource (WebView view, String url) {
if (progressDialog == null) {
progressDialog = new ProgressDialog(activity);
progressDialog.setMessage("Bezig met laden...");
progressDialog.show();
}
}
public void onPageFinished(WebView view, String url) {
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Intent myIntent = new Intent();
myIntent.setClassName("com.test", "com.test.Main");
startActivity(myIntent);
Toast.makeText(activity, "Laden van onderdeel mislukt, probeer het later nog eens! ", Toast.LENGTH_LONG).show();
progressDialog.show();
}
});
webview.loadUrl(turl);
}
}
webscreen.xml layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- <1> -->
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content">
<EditText android:id="#+id/url" android:layout_height="wrap_content"
android:layout_width="wrap_content" android:lines="1"
android:layout_weight="1.0" android:hint="http://"
android:visibility="visible" />
<Button android:id="#+id/go_button" android:layout_height="wrap_content"
android:layout_width="wrap_content" android:text="go_button" />
</LinearLayout>
<!-- <2> -->
<WebView
android:id="#string/webview"
android:layout_width="fill_parent"
android:layout_height="0dip"
/>
</LinearLayout>

Looks like you're creating a second webview and then setting that as the content view, so your R.layout.webscreen is replaced.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.webscreen);
this.getIntent().getExtras();
this.webview = (WebView) findViewById(R.string.webview);
String turl = getIntent().getStringExtra(URL);
Log.i(TAG, " URL = "+turl);
**WebView webview = new WebView(this);
setContentView(webview);**
.....
Edit:
I've just noticed something in your code, should the line that reads:
this.webview = (WebView) findViewById(R.string.webview);
Acutally be:
this.webview = (WebView) findViewById(R.**id**.webview);
Edit 2:
Just noticed another thing while I was making the project. The following in webscreen.xml:
android:id="#string/webview"
Should be:
android:id="#+id/webview"
Edit 3:
And another thing noticed in webscreen.xml:
android:layout_height="0dip"
Sure you want a 0 height?? ;-)