users have an activity with an edittext and a button.
in the edittext they have to insert their login ID. and press go to display a other activity with webview loading the right site.
an example. this is the link i want users to visit . www.example.com/time/id=1/type=student
if sombody enters a 2 in the edittext it wil open the times for student id 2 and so on.
this is what i have.
LOGIN
package com.beter;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.app.Activity;
import android.content.Intent;
public class LoginActivity extends Activity {
Button go_btn;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
go_btn = (Button) findViewById(R.id.go_btn);
go_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myIntent = new Intent(LoginActivity.this, WebActivity.class);
LoginActivity.this.startActivity(myIntent);
}
});
}
and the layout
<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" >
<EditText
android:id="#+id/idfield"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:ems="10"
android:hint="#string/id"
android:inputType="number" >
<requestFocus />
</EditText>
<Button
android:id="#+id/go_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/idfield"
android:text="#string/login" />
The Webview Activity
package com.beter;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
public class WebActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
WebView webview = new WebView(this);
setContentView(webview);
webview.loadUrl("http://roosters.gepro-osi.nl/roosters/rooster.php?wijzigingen=1&leerling=116277&type=Leerlingrooster&afdeling=12-13_OVERIG&school=905");
}
}
and again the layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<WebView
android:id="#+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
How do i make the user input. display the good webview. ?
First of all get a reference to your edittext in your Login Activity as
go_btn = (Button) findViewById(R.id.go_btn);
ed_txt = (EditText)findViewById(R.id.youredittextid);
The change your onClick to
public void onClick(View v) {
Intent myIntent = new Intent(LoginActivity.this, WebActivity.class);
myIntent.putExtra("id", ed_txt.getText());
LoginActivity.this.startActivity(myIntent);
}
Then retrive this id in your WebActivity onCreate as
String id = getIntent().getExtras().getString("id");
Then your url will be
String myURL = "www.example.com/time/id="+id+"/type=student";
Related
I created the simple application App, the user enters his name in EditText and click on "Enter here" button and store his name in String variable that is instance variable then will move to another activity "activity_welcome" and will display his name in TextView
My problem:
when I create an object from Main Class to get the variable name in welcome Class when running this app, the name do not store in TextView that means that
the object main refers to null
My question:
why object main refer to null?
When I make the variable name as a static variable the app will display the name in TextView that mean that object main store the value of name variable
Note:
Main class
package code.app;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class Main extends AppCompatActivity {
EditText editText ;
String name ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText=findViewById(R.id.et) ;
}
public void Go (View v){
name=editText.getText().toString() ;
Intent intent= new Intent(this,Welcome.class);
startActivity(intent);
}
}
activity_main
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/ba"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#ffffff"
>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="50dp"
android:hint="Enter Your Name"
android:textColorHint="#000"
android:id="#+id/tv1"
android:textColor="#000"
android:background="#ffffff"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="50dp"
android:text="Enter Here"
android:background="#645353"
android:onClick="Go"/>
</LinearLayout>
Welcome Class
package code.app;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
import android.widget.Toast;
public class Welcome extends AppCompatActivity {
TextView textView ;
#Override
protected void onCreate( Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
textView =findViewById(R.id.tv);
Main main =new Main () ;
Toast.makeText(this,main.name, Toast.LENGTH_SHORT).show(); // this Toast donot display any thing
textView.setText(main.name);
}
}
activity_welcome
<?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"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/tv"
android:layout_margin="50dp"
/>
</LinearLayout>
Just keep it simple and put string inside your intent when you go to another activity, obtain intent, and then string from the intent.
public void Go (View v){
name=editText.getText().toString() ;
Intent intent= new Intent(this,Welcome.class);
intent.putExtra("name", name);
startActivity(intent);
}
Obtain it in your welcome activity like this.
#Override
protected void onCreate( Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
textView =findViewById(R.id.tv);
Intent intent = getIntent();
if(intent!=null) {
String name = intent.getStringExtra("name");
Toast.makeText(this, name, Toast.LENGTH_SHORT).show();
textView.setText(name);
}
}
This is my main class that will be forwarding the username to my GoalActivity class. I cannot figure out where the issue is. It keeps crashing for an unknown reason to me. I've followed various tutorials, and I cannot figure out the issue. It seems that I retrieve the username correctly, and then convert it into a string. Then create an Intent and pass the username value with a key.
MainActivity.java
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.example.agray.carpediem.LoginDataBaseAdapter;
import com.example.agray.carpediem.R;
import com.example.agray.carpediem.SignUPActivity;
public class MainActivity extends Activity
{
Button btnSignIn,btnSignUp;
LoginDataBaseAdapter loginDataBaseAdapter;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//create instance of SQLite Database
loginDataBaseAdapter=new LoginDataBaseAdapter(this);
loginDataBaseAdapter=loginDataBaseAdapter.open();
//create reference to the buttons used
btnSignIn=(Button)findViewById(R.id.buttonSignIN);
btnSignUp=(Button)findViewById(R.id.buttonSignUP);
// Signup button w/onclick listener
btnSignUp.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
// TODO Auto-generated method stub
/// Create Intent for SignUpActivity
Intent intentSignUP=new Intent(getApplicationContext(),SignUPActivity.class);
//start the activity w/intent
startActivity(intentSignUP);
}
});
}
// Methods to handleClick Event of Sign In Button
public void signIn(View View)
{
final Dialog dialog = new Dialog(MainActivity.this);
dialog.setContentView(R.layout.login);
dialog.setTitle("Login");
//get the References of views
final EditText editTextUserName=
(EditText)dialog.findViewById(R.id.editTextUserNameToLogin);
final EditText editTextPassword=
(EditText)dialog.findViewById(R.id.editTextPasswordToLogin);
Button btnSignIn=(Button)dialog.findViewById(R.id.buttonSignIn);
//Signin Button w/ onClickListener
btnSignIn.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
//store username and password as strings
String userName=editTextUserName.getText().toString();
String password=editTextPassword.getText().toString();
//fetch the Password from the DB for respective username
String storedPassword=loginDataBaseAdapter.getSingleEntry(userName);
// check if the Stored password matches with Password entered by user
if(password.equals(storedPassword))
{
Toast.makeText(MainActivity.this, "Congrats: Login is Successful " + userName,
Toast.LENGTH_LONG).show();
dialog.dismiss();
// final EditText editTextUserName=
// (EditText)dialog.findViewById(R.id.editTextUserNameToLogin);
// String userName=editTextUserName.getText().toString();
//create intent that will start the goals activity w/some data
Intent intro = new Intent(getApplicationContext(), GoalActivity.class);
//put the username into intent
intro.putExtra("USER_NAME", userName);
startActivity(intro);
}
else
{
Toast.makeText(MainActivity.this, "Access Denied: User Name or Password " +
"does not match",
Toast.LENGTH_LONG).show();
}
}
});
dialog.show();
}
#Override
protected void onDestroy() {
super.onDestroy();
// Close The Database
loginDataBaseAdapter.close();
}
}
Here is my GoalActivity class that receives info from the MainActivity class.
GoalActivity.java
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class GoalActivity extends Activity{
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.goals_page);
//get the username from the intent
String enteredUserName = getIntent().getStringExtra("USER_NAME");
final TextView tv = (TextView)findViewById(R.id.user_name_forwarded);
tv.setText(enteredUserName);
}
}
login.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" >
<EditText
android:id="#+id/editTextUserNameToLogin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="User Name"
android:ems="10" >
<requestFocus />
</EditText>
<EditText
android:id="#+id/editTextPasswordToLogin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword"
android:hint="Password" />
<Button
android:id="#+id/buttonSignIn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Sign In" />
</LinearLayout>
goals_page.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"
android:weightSum="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/welcome_goals"
android:textSize="50sp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/user_name_forwarded"
android:text="#string/emptyString"
android:layout_weight="0.09"/>
</LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.agray.carpediem" >
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="CarpeD"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.agray.carpediem.MainActivity"
android:label="CarpeD" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SignUPActivity"/>
<activity android:name=".GoalActivity"/>
</application>
</manifest>
Try this, e.g. in ActivityA:
Intent i = new Intent(ActivityA.this, ActivityB.class);
i.putExtra("USER_NAME", userNameString);
startActivity(i);
In ActivityB:
Bundle extras = getIntent().getExtras();
if (extras == null) {
return;
}
String USERNAME = extras.getString("USER_NAME");
Solved. It was a very careless mistake. I had updated all the other activities in the Manifest but the activity tag for the GoalActivity.java. Thanks guys for all your help!
I'm beginner in Android. I'm trying to make an app where when user tap on button he should go to another activity let say if user tap on button 1 he see new activity with information-A and if he press button 2 he see information-B in same activity he saw information A.
How can I set that.
If I am understanding your question correctly, here's a solution.
You can use the putExtras method of Intent to pass data in key/value pairs to the next activity.
Add the following to activity 1 layout:
<Button
android:id="#+id/btnA"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button A"
android:onClick="goToActivityFromButtonA" />
<Button
android:id="#+id/btnB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/btnA"
android:text="Button B"
android:onClick="goToActivityFromButtonB" />
Add the following methods to Activity 1:
public void goToActivityFromButtonA(View view) {
Intent intent = new Intent(this, ActivityTwo.class);
intent.putExtra("buttonData", "You clicked button A");
startActivity(intent);
}
public void goToActivityFromButtonB(View view) {
Intent intent = new Intent(this, ActivityTwo.class);
intent.putExtra("buttonData", "You clicked button B");
startActivity(intent);
}
Add the following to Activity 2 layout:
<TextView
android:id="#+id/txtText"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
Add the following to the onCreate method of activity 2:
TextView txtText = (TextView)findViewById(R.id.txtText);
txtText.setText(getIntent().getExtras().getString("buttonData"));
I just created a sample project for you:
https://drive.google.com/file/d/0B0S6sddMC_rMSUNieUxkR2lFRzQ/view?usp=sharing
you have first create ui for first activity like this
<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=".FirstActivity" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="15dp"
android:layout_marginTop="77dp"
android:text="Button 1" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="110dp"
android:layout_marginLeft="38dp"
android:layout_toRightOf="#+id/button1"
android:text="Button 2" />
</RelativeLayout>
ui of second activity like this
<?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" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="second actvity" />
</LinearLayout>
activity first code where i set index with intent for both button click(you also put string double ling and message with intent)
package com.example.teststart;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class FirstActivity extends Activity implements OnClickListener{
Button b1,b2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
b1=(Button)findViewById(R.id.button1);
b2=(Button)findViewById(R.id.button2);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
int id=v.getId();
switch(id){
case R.id.button1:
Intent i1=new Intent(FirstActivity.this,secondactivity.class);
i1.putExtra("one", 1);
startActivity(i1);
break;
case R.id.button2:
Intent i2=new Intent(FirstActivity.this,secondactivity.class);
i2.putExtra("one", 2);
startActivity(i2);
break;
}
}
}
and second activity i get that integer value to identify which button is clicked and fire operation on that condition
package com.example.teststart;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class secondactivity extends Activity{
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.secondactvity);
tv=(TextView)findViewById(R.id.textView1);
Bundle extras = getIntent().getExtras();
int index = extras.getInt("one");
if(index==1){
tv.setText("nformation-A "+index);
}else if(index==2){
tv.setText("nformation-B "+index);
}
}
}
I am creating an Android application to work as a simple browser. The user enters a web address and then clicks a button. After this, the application should the website in the WebView. However, after the button is clicked, a notification pops up asking me to choose a browser to complete my action. [The options in the pop up are my default browser, mozilla, etc.]
However, I do not want to use any of them. What should I do ?
This is my .java file:
package com.example.all_in_one;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;
public class SimpleBrowser extends Activity implements OnClickListener{
WebView myBrowser;
EditText URLaddress;
Button Go;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.simple_browser);
myBrowser = (WebView) findViewById(R.id.WV);
URLaddress = (EditText) findViewById(R.id.webaddress);
Go = (Button) findViewById(R.id.go);
Go.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.go:
String address = URLaddress.getText().toString();
myBrowser.loadUrl("http://" + address);
break;
}
}
}
This is my .xml file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="#+id/LL1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="5" >
<EditText
android:id="#+id/webaddress"
android:inputType="textNoSuggestions"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
/>
<Button
android:id="#+id/go"
android:text="Go"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="4"
/>
</LinearLayout>
<WebView
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="#+id/WV"
android:layout_below="#+id/LL1" />
</RelativeLayout>
I have added the Internet permission in my Manifest file.
Please help. Thank you in advance.
You have to pass the WebViewClient class object to browser.setWebViewClient(new BrowserClient()) to open the links in the webview.
private class BrowserClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.d(tag, "shouldOverrideUrlLoading");
view.loadUrl(url);
return true;
}
}
and in your onCreate() call like this
myBrowser.setWebViewClient(new BrowserClient());
when i click on button add debug error
and opens confirm perspective switch dialog box
shows error in dis line " EditText add = (EditText) d1.findViewById(R.id.add); "
what is the mistake in my code??
xml page
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Question1" >
</TextView>
<EditText
android:id="#+id/question"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="" >
</EditText>
<EditText
android:id="#+id/answer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="" >
</EditText>
<Button
android:id="#+id/registerques"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="registerques" >
</Button>
</LinearLayout>
java class
showing error in editext line
package quesansw.the1;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
public class Memo extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Dialog d1 = new Dialog(this);
Window window = d1.getWindow();
window.setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND,
WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
d1.setTitle("Register Questions");
d1.setContentView(R.layout.memo);
d1.show();
Button view1 = (Button) d1.findViewById(R.id.view);
Button add = (Button) d1.findViewById(R.id.add);
add.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText add = (EditText) d1.findViewById(R.id.add);
EditText view = (EditText) d1.findViewById(R.id.view);
System.out.println(add.toString());
System.out.println(view.toString());
}
});
view1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(getBaseContext(), View.class);
startActivity(intent);
}
});
}
}
Probably da error in the code is that you never defined an id "add" - you have #+id/TextView01 in the xml "page" (you mean file - and you must tell us which file) but no #+id/add