Develop Reference

Multiple Image Buttons

I created an activity on android studio and I have put there something like 20 ImageButtons. I want to use it as on each click on an image it will move to a new activity. All of the Image Buttons are working on the same principle, my app is a game, and each image represents a level. I want to build one function that will be used on all buttons and will move the user to a new activity according to the data(the properties of the image button) and use that data on the new activity. Every level has its own activity and the main activity is the menu of the game.
Below is my code:
public ImageButton beatsCall; public void Beats(){ beatsCall=(ImageButton)findViewById(R.id.beats); beatsCall.setOnClickListener(new View.OnClickListener() { #Override public void onClick(View v) { Intent toy = new Intent(Levels.this,Beats.class); startActivity(toy); } }); }

You need to provide more information and code. However, you may want to try set a distinct onClickListener and then set all the imageButtons to that listener that will perform an action depending on the button clicked. For example, say you have 4 imageButtons and you want to perform a different action (in your case, start a new activity) for each different button click.
View.OnClickListener listener = new View.OnClickListener() {
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
//Start activity 1 here, for example
Intent intent = new Intent(this, YourNewActivity1.class);
String message = v.getId().toString;
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
break;
case R.id.textView2:
//Start activity 2 here
break;
case R.id.textView3:
//Start activity 3 here
break;
case R.id.textView4:
//Start activity 4 here
}
}
};
button1.setOnClickListener(listener);
button2.setOnClickListener(listener);
button3.setOnClickListener(listener);
button4.setOnClickListener(listener);
This is assuming you have the imageButtons set up in your layout file and you have them initialized in your activity.
In your new activity, you can get the message as such:
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
if (some condition with message){
do something
}
You may also check out this documentation for further information regarding intents.

Something like this? In your xml make your images clickable and give them ID's like this...
<ImageView
android:id="#+id/level_1_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
/>
Then call a function like this in your Activity's onCreate
private void setupButtons() {
findViewById(R.id.level_1_button).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplication(), LevelOne.class));
}
});
findViewById(R.id.level_2_button).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplication(), LevelTwo.class));
}
});
}

You could assign a tag via android:tag to each of your views and then use your single listener to switch on the view's tag to branch the behavior you want.

How to add a value to a Toast, from a Edittext (with button)

I searched the web, but couldn't find a solution. I found several codes but I have some problems to implement it in my code. Hope you guys know what I'm messing up here.
I'm creating an SMS app, where you choose from a spinner (which preloads
a txt) and you can continue the text from an edittextfield and press
the button to send the SMS. Working great but now I would like the toast to
contain what the user wrote in the field.I can create a normal Toast where I can write my own text. If you look at case 1 you can see where I wrote value_edittextfield (just so you can see where the value should be) and String nrforanvandare is the EditTextField.
I really hope there is a solution, because it would be so awesome.
spinneruse.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
switch (position) {
case 0 :
skickatelBTN.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
}
);
case 1 :
skickatelBTN.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String myMsgnruta = tele1txt.getText().toString();
String theNumberr = nyanumtxt.getText().toString();
String nrforanvandare = nrrutaforspinner.getText().toString();
sendMsg(theNumberr, myMsgnruta + nrforanvandare);
Toast.makeText(getActivity(), "value_Edittextfield. sent",
Toast.LENGTH_LONG).show();
}
}
);
break;

According to EditText you can use getText() to get the input text, which in turn returns Editable, which you can get with the default toString() method.
For example:
Toast.makeText(getApplicationContext(), myEditText.getText().toString(),
Length_LONG).show();
Here, I assumed that your EditText variable name is myEditText.
This should do it.
EDIT:
On a side note, why wouldn't using String nrforanvandare = nrrutaforspinner.getText().toString(); do the trick, given nrrutaforspinner is your EditText? If not, well, that's how you do it.

Android Studio onClick button to display ImageView in another activity

I have setup 2 activities - one and two .
For activity 1, I have a EditText and a button. When user open the app, it will show Activity One(just like the screenshot) to prompt user to key in a number. For example, 1 or 2.
What I am trying to do is that: I want to display a ImageView in activity 2 when user key in a number in EditTextfollow by a click on the button in activity 1.
If user key in 1, it will display 1.png in activity 2
If user key in 2, it will display 2.png in activity 2
If user key in 3, it will display 3.png in activity 2
etc...
the image will get from drawable folder.
Please refer to this screenshot
[![enter image description here][1]][1]
I can pass the integer value through Intent from activity 1 to 2 but I can't do it for ImageView. so that means the if else loop i have already done just that the ImageView cant display.
get_image.setBackgroundResource(R.drawable.1); // here i can only key in 01 ( it will get image from Drawable folder 1.png). i cant put int value into it.
Or i shouldn't use get_image.setBackgroundResource?? Anyone can help? I stuck here for 1 day...
thanks in advance!
please check screenshot -> http://i.stack.imgur.com/53vjy.jpg

You said that you can pass integer value from activity 1 to 2 so just use that to find your image.
ImageView imageView = (ImageView)findViewById(R.id.yourImageViewId);
if(1 == yourValue) {
//set 01.png
} else {...}
I may missing somethings because i can't understand when you said that "but i cant do it for imageview".
EDIT: after your addtional code.
So you must map your integer value with your resource file name. You could not put your integer value to get_image.setBackgroundResource(R.drawable.id).
I think in your situation you should use an array just store id of resource you need int[] drawableIds = {R.drawable.01, R.drawable.02} in your Activity2
and then use like this get_image.setBackgroundResource(drawableIds[yourIntegerValue-1]) (ofcourse you should take care array out of index when you use this method).

Try below code for your solution,
For Activity One write below code to redirect on activity 2
Intent intent = new Intent(Activity1.this, Activity2.class);
intent.putExtra("SelectedNumber", editText.getEditableText.toString());
startActivity(intent);
Now In Activity 2 write below code in onCreate method
int selectedNumber = 1;
if(getIntent().getExtras() != null)
{
selectedNumber = getIntent().getExtras().getInt("SelectedNumber");
}
switch(selectedNumber)
{
case 1: // set your 01.png Image
break;
case 2: // set your 02.png Image
break;
// And so
}

Try this way might helps you.
String mDrawableName = "1"; //editText.getText().toString();
int resID = getResources().getIdentifier(mDrawableName , "drawable", getPackageName());
then your Activity2 use,
setImageResource(resID);
(or)
setImageDrawable(getResources().getDrawable(resID));
Finally,
button.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
String mDrawableName = editText.getText().toString();
int resID = getResources().getIdentifier(mDrawableName , "drawable", getPackageName());
Intent ii=new Intent(Activity.this, Activity1.class);
ii.putExtra("resId", resID);
startActivity(ii);
}
});
Activity2
public class Activity2 extends Activity
{
private ImageView img;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.intent);
img = (ImageView)findViewById(R.id.img);
Intent iin= getIntent();
Bundle b = iin.getExtras();
if(b!=null)
{
int drawableId =(int) b.get("redId");
img.setImageResource(drawableId);
}
}
}

you can pass resource value in extras. try this way.
EditText edit = (EditText) findViewById(R.id.yourEdittext);
Button btn = (Button) findViewById(R.id.yourButton);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ActivityOne.this, ActivityTwo.class);
if(edit.getText().toString().trim().equals("1")){
i.putExtra("image", R.drawable.01);
startActivity(i);
}else if(edit.getText().toString().trim().equals("2")){
i.putExtra("image", R.drawable.02);
startActivity(i);
}else{
Toast.makeText(getApplicationContext(), "Please Enter Valid Value.",
Toast.LENGTH_SHORT).show();
}
}
});
and in your ActivityTwo.java
ImageView imageView = (ImageView)findViewById(R.id.yourImageViewId);
imageView.setImageResource(getIntent().getIntExtra("image",0));
Happy Coding.

In activity 2's on create
get_image= (ImageView)findViewById(R.id.imageView);
then use switch case for values from intent then
switch(intentValues){
case 1:
get_images.setImageDrawable(getResources().getDrawable(R.drawable.1));
break;
case 2:
get_images.setImageDrawable(getResources().getDrawable(R.drawable.2));
break;
}

TableLayout, Different Button actions depending on data in TableRow

I have the following problem:
I have a TableLayout along with several TableRows, which are dynamically created.
On the right side of every row I create a button, which should call another activity.
Now I want to pass some information with intent.putExtra(). In this case I want so pass the row number, which is also the first information in the row.
Here is a picture of the current state:
This is how I create the buttons during run-time (in a loop):
Button b1 = new Button (this, null, android.R.attr.buttonStyleSmall);
b1.setId(1000+grButtonId);
b1.setText("Request GR");
b1.setLayoutParams(params);
b1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
// Some code, taken out for clarity
// See next code snippet
}
});
grButtonId++;
tr.addView(b1);
My idea so far is to use the id of the button (of course), and get the line number by the value of grButtonId.
Now comes my problem, let's have a detailed look at my onClickmethod:
#Override
public void onClick(View view) {
// finished is true, as soon as GRRequest has recieved the data
if(!finished & !dataRequested){
new GRRequest().execute(getIntent().getLongExtra("poNr", 0),(long)view.getId());
b1.setText("Show GR");
Log.d("DataList", detailList.toString());
dataRequested=true;
}
else{
if (dataRequested){
b1.setText("Show GR");
}
Intent intent = new Intent(DataTableCreater.this, GRTableCreater.class);
intent.putExtra("lineNr",view.getId());
intent.putExtra("dataList", detailList);
startActivity(intent);
}
}
When I request my data, the button I clicked on gets set to "Show GR" , as intended. The other buttons stay on "Request GR", this is also fine. But now I want these Buttons to Change to "Show GR" when tapped first and on second tap start the activity.
By now, the buttons change to "Show GR" and directly start the activity.
What would be a solution, to make this work?

Create a boolean Array clickedOnce[] = new boolean[grButtonId+1] one field for every Button.
Then have this
public void onClick(View view) {
if(!finished){
new GRRequest().execute(getIntent().getLongExtra("poNr", 0),(long)view.getId());
b1.setText("Show GR");
Log.d("DataList", detailList.toString());
clickedOnce[Integer.parseInt(String.valueOf(view.getId()).substring(1,4))]=true; //sets the clickedOnce for this button to true, substring(1,4) is needed to cancle the leading 1 from the id
}
else{
//Checks, if the button was clicked once
if (!clickedOnce[Integer.parseInt(String.valueOf(view.getId()).substring(1,4))]){
b1.setText("Show GR");
clickedOnce[Integer.parseInt(String.valueOf(view.getId()).substring(1,4))]=true;
}
else{
Intent intent = new Intent(DataTableCreater.this, GRTableCreater.class);
intent.putExtra("lineNr",view.getId());
intent.putExtra("dataList", detailList);
startActivity(intent);
}
}
}

Null Pointer on an attempt to call a button

I have a null pointer on a button that I need to take me to a new layout when pushed. I have the code set as:
((Button) findViewById(R.id.analyzee)).setOnClickListener(btnClick);
inside a method that uses conditional statements.
It is a basic face detect app. If faces are not found, I do this:
if (facesFound < 1) {
mFlipper.setDisplayedChild(2);
mTheMessage = (TextView) findViewById(R.id.falsemessage);
mThePicture = (ImageView) findViewById(R.id.false_view);
mTheMessage.setText(R.string.noFaceOne);
mThePicture.setImageBitmap(bitmap565);
return;
if faces are found, I draw a box on the face, and do this:
mFlipper.setDisplayedChild(1);
mTheMessage.setText(R.string.noFaceFive);
mThePicture.setImageBitmap(bitmap565);
My issue lies here though, I use this method to run when buttons are clocked:
private final View.OnClickListener btnClick = new View.OnClickListener() {
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.scan_box:
openCamera();
break;
case R.id.crop_face:
final ProgressDialog dialog = ProgressDialog.show(Main.this, "",
"Cropping photo", true);
dialog.show();
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
dialog.dismiss();
}
}, 3000);
cropFace();
break;
So, my issue lies in this:
In one of my layouts in the flipper, the button that rests on the layout will need to give the user the option to snap a new picture if there are no faces found. The other layout will need the button (upon click) to have the faces cropped and the results to be sent to another layout.
The issue I am facing is where the code:
((Button) findViewById(R.id.crop_face)).setOnClickListener(btnClick);
needs to be placed in order for the program to release the button has been clicked, it calls the case in my switch statement, and runs the crop face_method.
I try putting it in the if statement where I set the image View and text View, but I get a null pointer on that line I am declaring my button on.
The buttons I have on my main menu work fine, as they are in my onCreate method, but I don't know where to play this button command, and also where I need to place my reopen Camera command.
Thanks!

I simply was using the wrong button ID...sorry for the confusion =x