Develop Reference

How to add values by holding button in countdowntimer

I am making boxing countdown timer and to set how long round supposed to last I am using two button first "+" and second "-" my time add every 5 seconds ex "5,10,15,20,25..." but I always I have to click to add 5 second. I would like to hold button and my value will add automatically what should I do?
I hope I add every important information in my question
my code from buttons and display
public void dodawanie1(View view) {
iloscrund=iloscrund+1;
display(iloscrund);
public void odejmowanie1(View view) {
if(iloscrund>1){
iloscrund=iloscrund-1;
display(iloscrund);
}
}
private void display(int numer) {
TextView displayInteger=(TextView) findViewById(R.id.textView16);
displayInteger.setText("" + numer);
}
odejmowanie means decrease value
dodawanie means increase value

If you mean to determine between click and hold, use onTouchListener to determine hold button event.
onTouchListener

I think you should use Runnable and Handler class for do it.
this link should be useful.
Android: Implement a 1 second interval timer before calling a function
activity_auto_inc.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".AutoIncActivity">
<TextView
android:id="#+id/num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:gravity="center"
android:text="1"
android:textSize="26sp"
android:textColor="#color/black"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/add"
android:text="add"
android:textColor="#color/white"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/num" />
</androidx.constraintlayout.widget.ConstraintLayout>
AutoIncActivity.java
import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class AutoIncActivity extends AppCompatActivity implements
View.OnLongClickListener, View.OnTouchListener {
Button add;
TextView txt;
boolean isAddPressed = false;
Handler handler;
final int TIME_INTERVAL = 100;
final int STEP = 1;
#SuppressLint("ClickableViewAccessibility")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_auto_inc);
handler = new Handler();
add = findViewById(R.id.add);
txt = findViewById(R.id.num);
add.setOnLongClickListener(this);
add.setOnTouchListener(this);
}
#Override
public boolean onLongClick(View view) {
if (view.getId() == R.id.add) {
isAddPressed = true;
handler.postDelayed(new AutoInc(), TIME_INTERVAL);
}
return false;
}
#SuppressLint("ClickableViewAccessibility")
#Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_UP ||
motionEvent.getAction() == MotionEvent.ACTION_CANCEL) {
isAddPressed = false;
}
return false;
}
private class AutoInc implements Runnable {
#Override
public void run() {
if (isAddPressed) {
txt.setText(String.valueOf(Integer.parseInt(txt.getText().toString()) +
STEP));
handler.postDelayed(this, TIME_INTERVAL);
}
}
}
}

Drawing Circles using Canvas and Framelayout android

I am trying to create an app that displays a circle everytime I click a button. I have the layout looking great but when i click the button(circle) to display a circle on the screen nothing happens. I'm not confident that my draw circle class is being called correctly in my main activity. Here is my code below.
package com.example.randomcircles;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
public class DisplayRandomCircles extends Activity
{
DrawCircle c;
Canvas d;
#Override
public void onCreate(Bundle b)
{
super.onCreate(b);
setContentView(R.layout.activity_display_random_circles);
Button btn1 = (Button) findViewById(R.id.btn1);
Button btn2 = (Button) findViewById(R.id.btn2);
c = new DrawCircle(getApplicationContext());
d = new Canvas();
FrameLayout f1 = (FrameLayout) findViewById(R.id.frame);
}
#SuppressLint("WrongCall")
public void doit(View v)
{
switch (v.getId())
{
case (R.id.btn1):
c.onDraw(d);
break;
case (R.id.btn2):
break;
}
}
}
Here is my DrawCircle class
package com.example.randomcircles;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class DrawCircle extends View
{
public DrawCircle(Context con)
{
super(con);
}
#Override
protected void onDraw(Canvas c)
{
super.onDraw(c);
Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
p.setAntiAlias(true);
p.setStyle(Paint.Style.STROKE);
p.setStrokeWidth(100);
p.setColor(Color.RED);
p.setStyle(Paint.Style.FILL);
c.drawCircle(75, 75, 100, p);
}
}
And my layout xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:id="#+id/frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight=".75"
android:orientation="vertical" >
</FrameLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight=".25"
android:gravity="bottom|center"
android:orientation="horizontal" >
<Button
android:id="#+id/btn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="start|bottom"
android:layout_weight=".50"
android:onClick="doit"
android:text="#string/Circle" />
<Button
android:id="#+id/btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight=".50"
android:layout_gravity="end|bottom"
android:onClick="doit"
android:text="#string/Clear" />
</LinearLayout>
</LinearLayout>

Ok, here are some changes I'd make for this. I'm not exactly sure what you're trying to do, but this should make things easier.
First, change your class "DrawCircle" like this:
public class DrawCircle extends View
{
final Paint circlePaint;
{
circlePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
circlePaint.setAntiAlias(true);
circlePaint.setStyle(Paint.Style.STROKE);
circlePaint.setStrokeWidth(100);
circlePaint.setColor(Color.RED);
circlePaint.setStyle(Paint.Style.FILL);
}
public DrawCircle(Context con)
{
super(con);
}
public DrawCircle(Context con, AttributeSet set)
{
super(con, set);
}
public DrawCircle(Context con, AttributeSet set, int style)
{
super(con, set, style);
}
#Override
protected void onDraw(Canvas c)
{
super.onDraw(c);
c.drawCircle(75, 75, 100, circlePaint);
}
}
This will allow you to reuse the same Paint object with each draw because the onDraw() method can be called hundreds of times and there's no need to slow down your program for this.
Second, adding the other constructors allows you to add the View to your FrameLayouts by xml.
<FrameLayout
android:id="#+id/frame"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.example.randomCircles.DrawCircle
android:id="#+id/circleFrame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
Next, to fill your screen, you need to loop in your onDraw method. Think about drawing on the canvas as a stamp. Every time you draw, you stamp your image at the location you specify on top of the previous draw.
So
protected void onDraw(Canvas c)
{
super.onDraw(c);
for(int i = 0; i < 10; i++)
{
c.drawCircle(i*100, 75, 100, circlePaint);
}
}
This should draw 10 circles of radius 100 pixels across the top of your screen.

How can I draw with canvas over an xml background?

I'm working on a simple project for my studies and I’m stuck with this problem.
I'm building Snakes And Ladders app and I’m trying to make my player (PNG image) to move around the board an animate.
I want the animation to happen over the game’s board background which I defined in an xml file and I just can’t do it.
The program that I will attach is not working, I have no idea why. In addition I need to add the part that takes the xml background in consideration, that part is missing and I will greatly appreciate if someone can help me solve this problem.
Thanks in advanced.
The board xml file(game.xml):
<?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:background="#drawable/easymap"
android:orientation="vertical" >
<TextView
android:id="#+id/whitePlayer"
android:layout_width="32dp"
android:layout_height="32dp"
android:background="#drawable/white"
android:visibility="gone" />
<TextView
android:id="#+id/blackPlayer"
android:layout_width="32dp"
android:layout_height="32dp"
android:background="#drawable/black"
android:visibility="gone" />
<Button
android:id="#+id/btRoll"
android:layout_width="160dp"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_alignTop="#+id/cubePic"
android:background="#drawable/buttonshape"
android:text="Roll"
android:textColor="#FFFFFF" />
<TextView
android:id="#+id/cubePic"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="42dp"
android:layout_marginRight="22dp"
android:background="#drawable/cube" />
<TextView
android:id="#+id/tvTurn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/cubePic"
android:layout_alignRight="#+id/btRoll"
android:text="Your turn!"
android:textColor="#color/green"
android:textSize="32dp"
android:textStyle="italic" />
</RelativeLayout>
The java class:
package com.example.snakesnladders;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class GFX_Game extends Activity implements OnClickListener {
TextView whitePlayer, blackPlayer;
Button roll;
TextView cube, map1, map2, map3, label;
boolean yourTurn = true;
MyBringBack ourView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ourView = new MyBringBack(this);
setContentView(ourView);
init();
}
private void init() {
cube = (TextView) findViewById(R.id.cubePic);
roll = (Button) findViewById(R.id.btRoll);
label = (TextView) findViewById(R.id.tvTurn);
roll.setOnClickListener(this);
}
#Override
protected void onDestroy() {
super.onDestroy();
}
#Override
public void onClick(View view) {
int rand = (int) (Math.random() * 6) + 1;
}
class MyBringBack extends SurfaceView implements Runnable {
SurfaceHolder ourHolder;
Thread ourThread = null;
Bitmap backGround, playerB, playerW;
boolean isRunning = true;
public MyBringBack(Context context) {
super(context);
playerW = BitmapFactory.decodeResource(getResources(),
R.id.whitePlayer);
ourHolder = getHolder();
ourThread = new Thread(this);
ourThread.start();
}
#Override
public void run() {
while (isRunning) {
if (!ourHolder.getSurface().isValid())
continue;
Canvas canvas = ourHolder.lockCanvas();
canvas.drawBitmap(playerW, 0, 0, null);
ourHolder.unlockCanvasAndPost(canvas);
}
}
}
}
The changed inner class:( I've extended View an override the onDraw method from the Viev class, and it still not working)
In addition I wanted to draw on my existing xml layout that i created in the game.xml file.
class MyBringBack extends View {
Bitmap playerW;
public MyBringBack(Context context) {
super(context);
playerW = BitmapFactory.decodeResource(getResources(),
R.id.whitePlayer);
}
#Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
canvas.drawBitmap(playerW,0,0,null);
}
}

Create a custom View as follows. If you're root view is RelativeLayout and you need to draw on it, extend a RelativeLayout
public final class MyRelativeLayout extends RelativeLayout {
Bitmap playerW;
public MyRelativeLayout(Context context) {
super(context);
init(context);
}
public MyRelativeLayout(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public MyRelativeLayout(Context context, AttributeSet attrs, int style) {
super(context, atts, style);
init(context);
}
private void init(final Context context) {
playerW = BitmapFactory.decodeResource(context.getResources(),
R.id.whitePlayer);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawBitmap(playerW,0,0,null);
}
}
Then use it in xml as follows
<?xml version="1.0" encoding="utf-8"?>
<your.package.name.package.MyRelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
...
all the stuff here
<your.package.name.package.MyRelativeLayout>

Adding a Icon to notification area in android app

O.K i have looked around this site and others and i see something similar to what i am wanting but yet it isn't what i am wanting...let me explain
i am learning to build an android app using eclipse that has a media player linked to my shoutcast server i am running, so far the apps works great but it doesn't have an icon on the top were the notification area is and when i go to a different app (a game) to play while leaving the music playing it minimizes the app .. thats fine but when i reopen the app it doesnt stop the mediaplayer infact if i play the player i will have 2 players running i will then have to force stop it using the task manager,, i know this can be done as i have apps on my phone that has icons and it will do what i am wanting
when i searched this site i found a link to youtube that has soemthing similar to what i am wanting
http://www.youtube.com/watch?v=e74z0_Z5QWI&feature=relmfu the code that is shown is as followed
import android.app.Activity;
public class StatusBar extends Activity implements OnclickListener{
NotificationManager nm;
#Override
Protected void onCreate(bundle savedInstance){
//TODO Auto-generated method Stub
super.oncreate(savedInstaceState);
setContentView(R.layout.statusbar);
Button stat = (Button)findViewById(R.id.bStatusBar);
stat.setOnClickListener(this);
nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
}
public void onClick(View v){
//TODO Auto-generated method Stub
Intent intent = new Intent(this, StatusBar.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
}
i have add this code to my MainActivity.java but it spits several errors to me that i have tried to fix using quickfix here is the script i currently have in my MainActivity.java file
package com.myapp.mytapp;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.SeekBar;
public class MainActivity extends Activity implements OnClickListener, OnTouchListener, OnCompletionListener, OnBufferingUpdateListener{
private Button btn_play,
btn_pause,
btn_stop;
private SeekBar seekBar;
private MediaPlayer mediaPlayer;
private int lengthOfAudio;
private final String URL = "http://link to url:8002";
private final Handler handler = new Handler();
private final Runnable r = new Runnable() {
#Override
public void run() {
updateSeekProgress();
}
};
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
btn_play = (Button)findViewById(R.id.btn_play);
btn_play.setOnClickListener(this);
btn_pause = (Button)findViewById(R.id.btn_pause);
btn_pause.setOnClickListener(this);
btn_pause.setEnabled(true);
btn_stop = (Button)findViewById(R.id.btn_stop);
btn_stop.setOnClickListener(this);
btn_stop.setEnabled(true);
seekBar = (SeekBar)findViewById(R.id.seekBar);
seekBar.setOnTouchListener(this);
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnCompletionListener(this);
}
#Override
public void onBufferingUpdate(MediaPlayer mediaPlayer, int percent) {
seekBar.setSecondaryProgress(percent);
}
#Override
public void onCompletion(MediaPlayer mp) {
btn_play.setEnabled(true);
btn_pause.setEnabled(false);
btn_stop.setEnabled(false);
}
#Override
public boolean onTouch(View v, MotionEvent event) {
if (mediaPlayer.isPlaying()) {
SeekBar tmpSeekBar = (SeekBar)v;
mediaPlayer.seekTo((lengthOfAudio / 100) * tmpSeekBar.getProgress() );
}
return false;
}
#Override
public void onClick(View view) {
try {
mediaPlayer.setDataSource(URL);
mediaPlayer.prepare();
lengthOfAudio = mediaPlayer.getDuration();
} catch (Exception e) {
//Log.e("Error", e.getMessage());
}
switch (view.getId()) {
case R.id.btn_play:
playAudio();
break;
case R.id.btn_pause:
pauseAudio();
break;
case R.id.btn_stop:
stopAudio();
break;
default:
break;
}
updateSeekProgress();
}
private void updateSeekProgress() {
if (mediaPlayer.isPlaying()) {
seekBar.setProgress((int)(((float)mediaPlayer.getCurrentPosition() / lengthOfAudio) * 100));
handler.postDelayed(r, 1000);
}
}
private void stopAudio() {
mediaPlayer.stop();
btn_play.setEnabled(true);
btn_pause.setEnabled(true);
btn_stop.setEnabled(true);
seekBar.setProgress(0);
}
private void pauseAudio() {
mediaPlayer.pause();
btn_play.setEnabled(true);
btn_pause.setEnabled(true);
}
private void playAudio() {
mediaPlayer.start();
btn_play.setEnabled(true);
btn_pause.setEnabled(true);
btn_stop.setEnabled(true);
}
public void homepage (View view) {
goToUrl ( "http://myhomepage.com/");
}
private void goToUrl (String url) {
Uri uriUrl = Uri.parse(url);
Intent launchBrowser = new Intent(Intent.ACTION_VIEW, uriUrl);
startActivity(launchBrowser);
}
}
here is what is in my activity_main.xml file
<?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"
android:background="#color/black"
android:icon="#drawable/ic_launcher"
android:orientation="vertical"
startForeground()>
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/logo" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TableRow
android:id="#+id/tableRow1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Button
android:id="#+id/homepage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="web"
android:clickable="true"
android:cursorVisible="true"
android:linksClickable="true"
android:onClick="homepage"
android:text="Home Page" />
</TableRow>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<Button
android:id="#+id/btn_play"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:background="#drawable/play"
android:clickable="true"
android:cursorVisible="true"
android:src="#drawable/play" >
</Button>
<Button
android:id="#+id/btn_pause"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:background="#drawable/pause"
android:clickable="true"
android:cursorVisible="true"
android:src="#drawable/pause" >
</Button>
<Button
android:id="#+id/btn_stop"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:background="#drawable/stop"
android:clickable="true"
android:cursorVisible="true"
android:src="#drawable/stop" >
</Button>
</LinearLayout>
<SeekBar
android:id="#+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="3dp" >
</SeekBar>
<ImageView
android:id="#+id/imageView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/scast" />
<TextView
android:id="#+id/Textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:gravity="center"
android:hint="#string/version" >
</TextView>
</LinearLayout>
can someone tell me what i did wrong or can rewrite what i have and still keep everything working
Thanks in advance
Rob

Changing the position of the thumb of the SeekBar using a different Button

I'm trying to move the position of the seekbar using a button. Basically I have a seekbar from 0 to 100. and I have button presents set up at arbitrary values (40,50,60 etc). When I try to set the progress on the seekbar via button, I get a fault.. I've already initialized the seekBar in the onCreate() method.
SeekBar seekBar = (SeekBar) findViewById(R.id.seekBar1);
currentProgress = 40;
seekBar.setMax(100);
seekBar.setProgress(currentProgress);
button40.setOnClickListener(button40Listener);
But when use the below, it crashes.
private OnClickListener button40Listener = new OnClickListener() {
public void onClick(View v) {
currentProgress = 40;
seekBar.setProgress(currentProgress);
}
}
This seems straight-forward. Any ideas?

You shouldn't need to put up another Seekbar. The initial one should be fine. Without the exception message and stack trace I'm not sure what is causing the crash. However, I just coded an example and works as you would expect. Perhaps by looking at my example you can identify your issue.
SeekbarTest.java:
package com.example.seekbartest;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.SeekBar;
public class SeekbarTest extends Activity {
/** Called when the activity is first created. */
private SeekBar seekBar;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
seekBar = (SeekBar)findViewById(R.id.seekBar1);
Button fortyPctButton = (Button)findViewById(R.id.buttonFortyPct);
fortyPctButton.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
seekBar.setProgress(40);
}
});
Button sixtyPctButton = (Button)findViewById(R.id.buttonSixtyPct);
sixtyPctButton.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
seekBar.setProgress(60);
}
});
Button eightyPctButton = (Button)findViewById(R.id.buttonEightyPct);
eightyPctButton.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
seekBar.setProgress(80);
}
});
}
}
And here is the main.xml it is referencing for the layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:text="#string/hello"
android:id="#+id/textView1"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"/>
<SeekBar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/seekBar1"
android:layout_below="#+id/textView1"
android:layout_alignLeft="#+id/textView1"
android:layout_alignRight="#+id/textView1"/>
<Button
android:layout_width="wrap_content"
android:text="40%"
android:id="#+id/buttonFortyPct"
android:layout_height="wrap_content"
android:layout_below="#+id/seekBar1"
android:layout_alignLeft="#+id/seekBar1"/>
<Button
android:layout_width="wrap_content"
android:text="60%"
android:id="#+id/buttonSixtyPct"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/buttonFortyPct"
android:layout_alignTop="#+id/buttonFortyPct"
android:layout_alignBottom="#+id/buttonFortyPct"/>
<Button
android:layout_width="wrap_content"
android:text="80%"
android:id="#+id/buttonEightyPct"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/buttonSixtyPct"
android:layout_alignTop="#+id/buttonSixtyPct"
android:layout_alignBottom="#+id/buttonSixtyPct"/>
</RelativeLayout>
Just create a new android app and replace the generated code + layout with the example above. It should work for you.
Good luck,
Craig