Develop Reference

If statement depending on the random image shown

I have a imageview that randomly generate 1 out of 2 possibles images clicking on one button.
I want that when one image is showed (R.drawable.aa) and I press other button, a toast is shown.
My problem is that once a random image is shown and click on the other button, nothing happens.
package com.example.isaiasalarcon.menu;
import java.util.Random;
import java.util.jar.Attributes;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import static com.example.isaiasalarcon.menu.R.drawable.aa;
public class buho extends Activity {
// UI components
private Button drawButton;
private Button boton2;
private ImageView cardImage;
// Random object
private final static Random random = new Random();
// The card deck
private final static int[] cardDeck = new int[] {
R.drawable.aa,
R.drawable.a2,
};
private Integer q;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_buho);
drawButton = (Button)findViewById(R.id.drawButton);
boton2 = (Button)findViewById(R.id.button2);
cardImage = (ImageView)findViewById(R.id.cardImage);
drawButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0)
{
Integer q = cardDeck[random.nextInt(cardDeck.length)];
cardImage.setImageResource(q);
}
});
boton2.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
if (q.equals(R.drawable.aa)) {
Toast toast = Toast.makeText(buho.this, "si", Toast.LENGTH_LONG);
toast.show();
} else {
Toast toast = Toast.makeText(buho.this, "no", Toast.LENGTH_LONG);
toast.show();
}
}
});
}
}

two things:
1) Integer q I don't see a reason why this needs to be an Integer. You should be able to int
2) your q inside the onClick is creating a NEW variable called q. You need to update your code to the following: (note how it doesn't have the Type declaration before it, so it means to use the previously declared variable)
drawButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0)
{
q = cardDeck[random.nextInt(cardDeck.length)];
cardImage.setImageResource(q);
}
});

Factorial program in android

Hey guys I know there are many java programs for the factorial of a number...but I am facing problem with android. Following is my code....Thanks
package com.droidacid.apticalc.aptitudes;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.droidacid.apticalc.R;
public class AptiFactorial extends Activity implements android.view.View.OnClickListener{
EditText number;
TextView answer;
Button calculate;
long factorial = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.apti_factorial);
initialize();
calcFactorial();
}
private void initialize() {
number = (EditText) findViewById(R.id.et_apti_number);
answer = (TextView) findViewById(R.id.tv_apti_answer);
calculate = (Button) findViewById(R.id.b_apti_calc);
calculate.setOnClickListener(this);
}
private void calcFactorial() {
if (number.getText().toString().equals("")) number.setText("0");
int num = Integer.parseInt(number.getText().toString());
for(int i = 1; i<=num; i++){
factorial = i * factorial;
}
}
#Override
public void onClick(View v) {
calcFactorial();
answer.setText("Factorial of " + number.getText().toString() + " is : " + factorial);
}
}
This is my code and I need to know a way around for setting the hint instead of 0, but if I remove if (number.getText().toString().equals("")) number.setText("0");
then getting NullPointerException...
Also on the first go its calculating correctly but If I calculate again then getting wrong answer. I think some loop issue because I am directly using the value of factorial.
Please help thanks

Forget all that equal stuff, cover all basis and do it like this:
package com.droidacid.apticalc.aptitudes;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.droidacid.apticalc.R;
public class AptiFactorial extends Activity implements android.view.View.OnClickListener{
EditText number;
TextView answer;
Button calculate;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.apti_factorial);
initialize();
}
private void initialize() {
number = (EditText) findViewById(R.id.et_apti_number);
number.setHint("Enter number to be factorialized :P")
answer = (TextView) findViewById(R.id.tv_apti_answer);
calculate = (Button) findViewById(R.id.b_apti_calc);
calculate.setOnClickListener(this);
}
private long calcFactorial() {
long factorial = 1;
try {
factorial = Long.parseLong(number.getText().toString());
for(int i=factorial-1; i>0; i--){
factorial = i * factorial;
}
} catch (NumberFormatException e) {
Toast.makeText(this, "Incorrect Input", Toast.LENGTH_LONG).show();
} finally {}
return factorial;
}
#Override
public void onClick(View v) {
answer.setText("Factorial of " + number.getText().toString() + " is : " + calcFactorial());
}

Do something like.
private void calcFactorial() {
int num = 0;
if (!number.getText().toString().equals(""))
num = Integer.parseInt(number.getText().toString());
for(int i = 1; i<=num; i++){
factorial = i * factorial;
}
}

Rather than using
(number.getText().toString().equals("")) number.setText("0");
Use
(number.getText().length==0) number.setText("0");

** first go its calculating correctly but If I calculate again then getting wrong answer**
try like this
private void calcFactorial() {
factorial = 1;///Check out the line..
int num = 0;
if (!number.getText().toString().equals(""))
num = Integer.parseInt(number.getText().toString());
for(int i = 1; i<=num; i++){
factorial = i * factorial;
}
}
You need to make sure variable factorial is reinitialise to 1 .. for getting factorial for next number..

private void fact_isClicked(View view) {
if(textField.length()>0){
int ifac = Integer.parseInt(textField.getText().toString());
int fact = factorial(ifac);
tvsec.setText(String.valueOf(fact));
textField.setText(ifac+"!");
}}

How to make a group of clickable graphical object?

my question is how can I make a set of clickable images on Android.
I can make one clickable sphere by using ShapeDrawable, however I want to make more than one at once and still be able to get clicks in all of them.
Moreover I want to position them on screen at my will, instead of auto positioned as with layouts.
The number of spheres can change as can the places.
This is the code I use to make one:
Main.java
package com.teste;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Toast;
public class Main extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout layout = new LinearLayout(this);
CustomDrawableView mCustomDrawableView = new CustomDrawableView(this, 100, 100, 50, 50, 0xff74AC23);
CustomDrawableView mCustomDrawableView2 = new CustomDrawableView(this, 10, 10, 50, 50, 0xffffffff);
mCustomDrawableView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getBaseContext(), "Clicked green ball", Toast.LENGTH_SHORT).show();
}
});
mCustomDrawableView2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getBaseContext(), "Clicked white ball", Toast.LENGTH_SHORT).show();
}
});
layout.addView(mCustomDrawableView);
layout.addView(mCustomDrawableView2);
setContentView(layout);
}
}
CustomDrawableView.java
package com.teste;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
public class CustomDrawableView extends View {
private ShapeDrawable mDrawable;
public CustomDrawableView(Context context, int i, int j, int k, int l, int m) {
super(context);
LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
super.setLayoutParams(params);
mDrawable = new ShapeDrawable(new OvalShape());
mDrawable.getPaint().setColor(m);
mDrawable.setBounds(i, j, i + k, j + l);
}
protected void onDraw(Canvas canvas) {
mDrawable.draw(canvas);
}
}
Hope you can help :)

It should be as easy as making your clas
CustomDrawableView extends View implements OnClickListener {
// all your code here
public void onClick(View v) {
// your callback function here
}
}
Take a look at one example I wrote some time ago in this answer: Android onClick method doesn't work on a custom view

Changing Text Alignment in ProgressDialog

I have problem that how to change text inside the progressdialog (basically having STYLE_HORIZONTAL as in figure) (Using Android 1.6)
to text shown in figure.
Please help out in this case.
My code about the progressdialog refers like this:-
mProgressDialog = new ProgressDialog(PDFActivity.this);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setTitle(R.string.msgDownloadingWait);
mProgressDialog.setMessage(getResources().getString(
R.string.msgDownloading));
// User is not allowed to cancel the download operation.
mProgressDialog.setCancelable(false);
mProgressDialog.setMax(serverFileCount);
mProgressDialog.show();
Thanks in advance.

I got the answer related to this stuff some days back(but updating it today as got some free time).
Here the code that I have used for making this stuff best.I achieved above thing by Custom Dialog.Firstly here the code of activity from which I called the class of Custom Dialog.
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.widget.ProgressBar;
import android.widget.TextView;
public class ProgressThread extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyDialog dialog = new MyDialog(this);
dialog.show();
}
}
Now the code related to the Custom Dialog. Here I have used ProgressBar & TextViews in CustomDialog & made calculations on basis on download which in turn updates TextViews.The example used here updates the textviews & progressbar in dummy manner.You change that as per your need.
import android.app.Dialog;
import android.content.Context;
import android.graphics.Color;
import android.os.Handler;
import android.os.Message;
import android.widget.ProgressBar;
import android.widget.TextView;
public class MyDialog extends Dialog {
public static final int STATUS_UPDATE = 101;
public static final int STATUS_COMPLETE = 100;
ProgressBar progressBar;
TextView textView;
TextView percent;
int increment;
int progress;
public MyDialog(Context context) {
super(context);
setContentView(R.layout.progressbar);
setDialog();
}
private void setDialog() {
setTitle("Downloading Files....");
textView = (TextView) findViewById(R.id.textProgress);
progressBar = (ProgressBar) findViewById(R.id.progress_horizontal);
percent = (TextView) findViewById(R.id.textPercentage);
percent.setTextColor(Color.WHITE);
textView.setTextColor(Color.WHITE);
progressBar.setProgressDrawable(getContext().getResources()
.getDrawable(R.drawable.my_progress));
progressBar.setIndeterminate(false);
// set the maximum value
progressBar.setMax(1315);
launcherThread();
}
private void launcherThread() {
LoaderThread loaderThread = new LoaderThread();
loaderThread.start();
LauncherThread launcherThread = new LauncherThread();
launcherThread.start();
}
private class LoaderThread extends Thread {
#Override
public void run() {
try {
while (progressBar.getProgress() < progressBar.getMax()) {
// wait 500ms between each update
Thread.sleep(100);
increment++;
// active the update handler
progressHandler.sendEmptyMessage(STATUS_UPDATE);
}
progressHandler.sendEmptyMessage(STATUS_COMPLETE);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
// handler for the background updating
Handler progressHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case STATUS_UPDATE:
progressBar.setProgress(increment);
float value = increment / 1315F;
percent.setText(" " + ((int) (value * 100)) + "%");
System.out.println(value * 100);
textView.setText(String.valueOf(progressBar.getProgress())
.concat(" / " + progressBar.getMax()));
break;
case STATUS_COMPLETE:
dismiss();
}
}
};
private class LauncherThread extends Thread {
#Override
public void run() {
progressHandler.sendMessage(progressHandler.obtainMessage());
progressHandler.sendEmptyMessage(0);
}
}
}

How Do I Pass The Package To RemoteView in Android?

Me Doing "edu.sju.BlackJack" Is not causing updates that are later called to occur.
I reference the layout correctly and the calls that are supposed to update it are correct, so what do I put in for the package name?
I should add that my package name according to the manifest is the above.
This is the code I have now which currently doesn't update the screen (or i'm guessing change the value correctly).
RemoteViews name = new RemoteViews("edu.sju.BlackJack", R.layout.play_screen);
If that's not it.. would it then be this code?
name.setTextViewText(R.id.Dealer_Total, "0");
Dealer_Total is the id for the TextView that I want to change.. however again the Change is not occurring.
Thanks in advance for any and all assistance.
Here is the whole of my code that i'm talking about, first Playscreen.java
package edu.sju.BlackJack;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.widget.ImageView;
import android.widget.RemoteViews;
import android.widget.TextView;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import java.util.*;
public class PlayScreen extends Activity implements OnClickListener {
/** Called when the activity is first created. */
GameEngine Engine = new GameEngine();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.play_screen);
TextView TextDealer = (TextView)findViewById(R.id.Dealer_Total);
Engine.setView(TextDealer);
//Set up click listeners for all the buttons
View hitButton = findViewById(R.id.hit_button);
hitButton.setOnClickListener(this);
View standButton = findViewById(R.id.stand_button);
standButton.setOnClickListener(this);
//new preplay button (ML 10/24/10)
View prePlayButton = findViewById(R.id.prePlay_button);
prePlayButton.setOnClickListener(this);
Thread thread = new Thread(Engine);
thread.start();
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.prePlay_button:
v.setVisibility(View.GONE);
System.out.println("Working?");
Engine.setGameStart(1);
break;
case R.id.hit_button:
Engine.gameHit(1);
break;
case R.id.stand_button:
Engine.gameStand(1);
break;
}
// More buttons go here (if any) ...
}
}
Now here's the GameEngine Thread
Not the Whole of it, just enough so you get the idea
package edu.sju.BlackJack;
import java.util.Random;
import android.widget.RemoteViews;
import android.widget.TextView;
public class GameEngine implements Runnable {
static int playerCount = 0; //keep record of which cards to change for player when hit is selected
static int dealerCount = 0; //keep record of which cards to change for dealer when dealer hits
static int win = 0; //keeps record of wins (JV 10/01/10)
static int lose = 0; //keeps record of loss (JV 10/01/10)
static int hit = 0; //let's engine know if hit button was selected (0 means it has not)
static int stand = 0; //let's engine know if stand button was selected (0 means it has not)
static int playerTotal = 0; //tells player's total (JV 10/01/10)
static int dealerTotal = 0; //tells dealer's total (JV 10/01/10)
static int playerTurn = 0; //activates buttons so that they do actions when clicked (as it's players turn)
static int startGame = 0; //starts the game when the start game button is pressed
TextView TextDealer;
RemoteViews name = new RemoteViews("edu.sju.BlackJack", R.layout.play_screen);
public void run() {
name.setTextViewText(R.id.Dealer_Total, "0");
//main();
}
public void setView(TextView a)
{
TextDealer = a;
}
public void setGameStart(int i)
{
startGame = i;
}
public void gameHit(int i)
{
if(playerTurn == 1)
hit = 1;
}
public void gameStand(int i)
{
if(playerTurn == 1)
stand = 1;
}
public void main()
{//Start Game
Deck mainDeck = new Deck();
fillDeck(mainDeck);
//TextView TextPlayer = (TextView)findViewById(R.id.Player_Total);
//TextDealer.setText("" + dealerTotal);
//TextPlayer.setText("" + playerTotal);
while(true)
{
if(startGame == 1)
{
if(mainDeck.getList().size() < 15){
mainDeck = emptyDeck();
fillDeck(mainDeck);
}
//RESET CARD VIEWS TO DEFAULT
//RESET DEALERCARD AND PLAYERCARD TOTALS TO 0
dealerTotal = 0;
playerTotal = 0;
playerCount = 0;
dealerCount = 0;
//playHand(mainDeck);
}
}
}

Whatever your problem is, I don't think it is what you think it is. If your layout is appearing in the app widget, then the package name is being handled properly. If the update (your setTextViewText() call) is not having an effect, then either R.layout.play_screen does not have R.id.Dealer_Total or you are not sending over a RemoteViews that contains the setTextViewText() instructions.