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TextView goes out of screen up and down

So I'm creating the custom dialog box which should appear after the required button is pressed. However, when the text is too long, the textView goes out of screen. I tried to find a solution for this, however unsuccessfully.
I hope you will help me, guys. Thanks.
Here is the xml code for the dialog box:
<?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="wrap_content"
android:orientation="vertical"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/txt_dia"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:textSize="16sp"
android:layout_gravity="center"
android:textColor="#color/black"/>
</ScrollView>
<Button
android:id="#+id/btn_back"
android:layout_height="40dp"
android:layout_width="100dp"
android:clickable="true"
android:text="#string/bck"
android:textStyle="bold"
android:layout_gravity="left"/>
</LinearLayout>
Dialog class:
import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.TextView;
public class CustomDialogClass extends Dialog implements android.view.View.OnClickListener {
public Activity c;
public Dialog d;
public Button back;
private TextView strongHeads;
private String text = "";
public CustomDialogClass(Activity a) {
super(a);
this.c = a;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.custom_dialog);
strongHeads = (TextView) findViewById(R.id.txt_dia);
//strongHeads.setMovementMethod(new ScrollingMovementMethod());
if(text.equalsIgnoreCase("")){
strongHeads.setText(text);
}
strongHeads.setText(text);
back = (Button) findViewById(R.id.btn_back);
back.setOnClickListener(this);
}
#Override
public void onClick(View v) {
dismiss();
}
public void changeText(String txt){
this.text= txt;
}
}

Cannot find symbol id in button

Hello i am making a simple push button in android and this is my mainactivity file
package dk.troll.android;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
Button button;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
addListenerOnButton();
}
public void addListenerOnButton() {
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent browserIntent =
new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.troll.dk"));
startActivity(browserIntent);
}
});
}
}
and this is my xml file
<?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"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Lorem Ipsum and so much other stuff"
/>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button - Go To Troll" />
</LinearLayout>
On this line button = (Button) findViewById(R.id.button1); i get the error
cannot find symbol:variable id location:class R
Since the contents of class
r
are auto-generated,how can i fix the error?

fist restart eclipse
then doing this :
1.import R class to your activity, Import dk.troll.android.R;
2.be sure the all recurse file have not any error then try to clean project from Project then Clean.
3.build your project

image cannot be resolved or is not a field

I am doing an android project to create an animation using eclipse.
On MainActivity.java
it compiler shows 5 lint errors as follows
-image cannot be resolved or is not a field
-activity_main cannot be resolved or is not a field
-translate cannot be resolved or is not a field
-rotate cannot be resolved or is not a field
-shape cannot be resolved or is not a field
Here is doing there my code in MainActivity.java
package ahmed103.appdemo;
import android.R;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.*;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity implements AnimationListener {
ImageView image;
Animation animation1;
Animation animation2;
Button rotate, translate;
Context context = this;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image = (ImageView) findViewById(R.id.image);
rotate = (Button) findViewById(R.id.rotate);
translate = (Button) findViewById(R.id.translate);
image.setImageResource(R.drawable.shape);
animation1 = AnimationUtils.loadAnimation(this, R.anim.rotate);
animation2 = AnimationUtils.loadAnimation(this, R.anim.translate);
userInputHandler();
}
private void userInputHandler() {
rotate.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
image.startAnimation(animation1);
}
});
translate.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
image.startAnimation(animation2);
}
});
}
#Override
public void onAnimationEnd(Animation animation) {
image.setVisibility(View.VISIBLE);
}
#Override
public void onAnimationRepeat(Animation animation) {
image.setVisibility(View.VISIBLE);
}
#Override
public void onAnimationStart(Animation animation) {
image.setVisibility(View.VISIBLE);
}
}
Here is down there my activity_main.xml file
<html>
<LinearLayout 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:background="#DCDCDC"
android:orientation="vertical"
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" >
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="70dp"
android:minHeight="150dp"
android:minWidth="150dp" />
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</TableRow>
<Button
android:id="#+id/rotate"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:layout_weight="1"
android:text="#string/rotate_text" />
<Button
android:id="#+id/translate"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:layout_weight="1"
android:text="#string/translate_text" />
</LinearLayout>
</html>

Remove the below import
import android.R;
Also you have
<html> and </html>// should be removed from xml
Imnport
import ahmed103.appdemo.R;
And use
<?xml version="1.0" encoding="utf-8"?>
as the first statement in your activity_main.xml

why do i get an error if I use more than 2 different backgrounds for my xml files in eclipse?

I have 3 activities which I want to use different backgrounds with. but when i do this i get this i get this error however if i only use different backgrounds on 2 activities then the app works
In the logcat:-
11-20 13:40:25.855: E/AndroidRuntime(849): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.medepad.community_virtual_ward/com.medepad.community_virtual_ward.Temperature}: android.view.InflateException: Binary XML file line #2: Error inflating class <unknown>
the activities are called main welcome and temperature.
code for 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"
android:background="#drawable/main" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="400dp"
android:layout_marginTop="115dp"
android:text="TextView"
android:textColor="#000000"
android:textSize="40dp" />
</RelativeLayout>
java code
package com.medepad.community_virtual_ward;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener {
int a;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView start = (TextView)findViewById(R.id.textView1);
start.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent welcome= new Intent (this,Welcome.class);
startActivity(welcome);
}
}
code for temperature
<?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:background="#drawable/temperature" >
</LinearLayout>
java code
package com.medepad.community_virtual_ward;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class Temperature extends Activity implements OnClickListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.temperature);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
welcome xml code
<?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"
android:orientation="vertical"
android:background="#drawable/welcome" >
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="400dp"
android:layout_marginTop="115dp"
android:text="TextView"
android:textColor="#000000"
android:textSize="40dp" />
</RelativeLayout>
java code
package com.medepad.community_virtual_ward;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
public class Welcome extends Activity implements OnClickListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.welcome);
TextView next= (TextView)findViewById(R.id.textView2);
next.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent temperature= new Intent(this, Temperature.class);
startActivity(temperature);
}
}
why am i getting this error and what can i do to use the amount of backgrounds i want?

Problem with simple onClick action

Simple code which is copied from web doesnt seem to be working. There is no action when i click button but text of it is correctly changed. What's wrong?
package android.test;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class main extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button closeButton = (Button)this.findViewById(R.id.button1);
closeButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Klik!", Toast.LENGTH_LONG);
}
});
closeButton.setText("dupa");
}
}
main.xml
<?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"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello"
/>
<Button android:layout_width="wrap_content" android:id="#+id/button1" android:layout_height="wrap_content" android:text="#string/button"></Button>
</LinearLayout>
Thanks for any help,
Chris

You need to call .show() on your Toast.
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Klik!", Toast.LENGTH_LONG).show();
}