Can I use one layout with 2 activities?
I have an activity called "download.java" and one called "upload.java) and ONE layout called "main_site.xml".
"download.java" is the MainActivity
It shows 2 buttons and an empty listview--> "Download", "Upload", "lv"
When I click on upload the second activity "upload" would start up which starts "main_site.xml" for second time and the listview would be filled with data.
Now I have 2 times "main_site.xml" one above the other...
How can I just fill the listiview and not opening a "new" layout?
OnCreate in download.java
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_site);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
Button download = (Button)findViewById(R.id.cmd_download);
download.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
connectFTP("176.28.25.46");
listItems();
}
});
Button upload = (Button)findViewById(R.id.cmd_upload);
upload.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
Intent myIntent = new Intent(MainSite.this, upload.class);
MainSite.this.startActivity(myIntent);
}
});
}
OnCreate in upload.java
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_site);
myPath = (TextView)findViewById(R.id.path);
root = Environment.getExternalStorageDirectory().getPath();
getDir(root);
}
You should just update the ListView's contents, with the code in the same activity.
Yes , you can do. There is no reason why you can't do that. If your activity design layout is same in both these activity (or as many as you have in the app) you can use the same layout.xml file in different activity.
Use Static array list to pass data from Upload to Download activity and just finish the Upload activity and based on conditions use the static arraylist in onResume() of Download activity
Yes you can, you just have to use <include> as your tag, and again give an #+id/YOUR_NAME to reuse the same layout.
Related
I have two Activities. Activity 1 is designed to take in user input (EditText), and has a button that (if clicked) will go to activity 2. In activity 2, there is a LinearLayout and a button that will take you back to activity 1. I can currently add one textView (containing the user input from activity 1) to the LinearLayout in activity 2, but I would like to add several textView objects to the LinearLayout. When I try to add user input any time after the first, it simply replaces the textView object that held the information from the user input that was entered the first time.
From Activity 1 (AddExercise):
public class AddExercise extends AppCompatActivity {
private EditText name;
private EditText weight;
private EditText sets;
private EditText reps;
private String deets;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_exercise);
Button button = (Button) findViewById(R.id.button5);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
goToAddWorkout();
}
});
}
private void goToAddWorkout() {
Intent intent = new Intent(this, AddWorkout.class);
name = (EditText) findViewById(R.id.name);
weight = (EditText) findViewById(R.id.weight);
sets = (EditText) findViewById(R.id.sets);
reps = (EditText) findViewById(R.id.reps);
deets = name.getText().toString() + "\n\t\tWeight: " + weight.getText().toString() + "\n\t\tSets: " + sets.getText().toString() + "\n\t\tReps: " + reps.getText().toString();
intent.putExtra("details", deets);
startActivity(intent);
}
}
From Activity 2 (AddWorkout):
public class AddWorkout extends AppCompactActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_workout);
LinearLayout vBox = (LinearLayout) findViewById(R.id.vBox);
Bundle extras = getIntent().getExtras();
if (extras != null) {
TextView tv = new TextView(this);
tv.setText(extras.getString("details").toString());
vBox.addView(tv);
}
Button button = (Button) findViewById(R.id.button3);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
goToAddExercise();
}
});
}
}
You can try a public static List of String each time you can add your text to list and then On your second activity create text-view as per your list count. And add to your linear-layout.
For more click here....
So you want to be able to add multiple entries in your second activity, for every time you add one in the first. I would recommend a different and easier approach.
In your second activity, use a listview/recyclerview, instead of adding new textview. This has the added advantage that once you have added enough entries, scrolling won't be an issue.
Maintain a global list of entries, which you add the entries to. And populate the listview using this list.
you should try something like that as said by roshan-
((ArrayAdapter)listView.getAdapter()).insert(data_object, index);
((ArrayAdapter)listView.getAdapter()).notifyDataSetChanged();
use a shared preference for index... every time you come to second activity increment the index... on exit of app just clear the shared pref index variable.
Also you can add textview in your each list view item
There can be several ways to do it according to me, pick the one that suits your relevant application.
have a single activity and host two fragments. So you can share the data between the fragments using single activity. (Recommended way, I guess Fragments will ease the job for you.). Also you can store a local variable in Activity so that each time you start your application you can start it afresh, if its intended!
If not, you can use SharedPreferences. For each button click, add a string to the preference. When you add one more click, append the new data with a separator like ("|", "||").. So in Activity one write to the preference, in activity 2 read from the preference and display it as list view of dynamically create the linear layout and append it to the root layout.
Declare a static ArrayList in your Activity 1 and access it in activity 2. (Really bad way)
new to android development and run into a hurdle,im making an app that will have a lot of pictures, what i want to achieve is after i have pressed a button in the main activity to take me to another activity, i would like a page full of buttons on this new activity that once pressed each button will show a image and have some text i would like to add, i would like to do this without having to create a new activity for each photo so i am hoping somebody could kindly help me with this! think of it like a sounbank app that plays a sound when the buttons from each row is pressed! in my case it will show an image for each button, could this be done with just the main activity and an extra activity or will i end up with an activity open in project explorer for each picture.
your help is greatly appreaciated thank you.
Ok lets assume you are using drawables from your resource folder.
In that way you deal with integer ids that represent the images.
These id can be transmitted per Intent to a second activity, that
retrieves the intent, parses the id and loads / shows the image.
In your Activity A, where you have all your buttons, I assume further that
you've added OnClicklisteners to the button like:
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//something
}
});
In your click listener you replace //something with:
Intent i = new Intent(getApplicationContext, ActivityToShowImage.class);
i.putExtra(ActivityToShowImage.IMAGE_KEY_SOME_STRING, R.drawable.oneOfYourImages);
startActivity(i);
The first argument is the key to retrieve the id later and the second is the id.
The R.drawable.oneOfYourImages depends on which button got clicked and shoud
be different for every button.
You can do this for every button, or you create a method that returns an
OnClickListener with the id as parameter.
private View.OnClickListener showImageFor(final int resIdOfImage) {
return new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getApplicationContext, ActivityToShowImage.class);
i.putExtra(ActivityToShowImage.IMAGE_KEY_SOME_STRING, resIdOfImage);
startActivity(i);
}
};
}
Now, in Your ActivityToShowImage, you override the onCreate like this:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.yourLayout);
int imageId = 0;
Bundle extras = getIntent().getExtras();
if(extras != null){
imageId = extras.getInt(IMAGE_KEY_SOME_STRING, 0);
}
if(imageId == 0){
//some log message or exception and don't forget to finish in onResume()
}else{
loadImage(imageId);
}
}
And in your loadImage method you load the image via the id into an ImageView.
I hope that is the answer to your question and sorry for the late response.
I'm changing my ContentView of the Activity at some point. (to View2).
After changing it back to View1, the listeners are not more working.
I already tried putting the Listener in the onResume() method.
Is it common anyway to use setContentView() to display e.g. a Progress screen/please wait,...(while an asyncTask is running).
Or should you only have ONE mainView for each Activity? (and replacing the content dynamically).
//EDIT: To be more specific:
I am looking for something like
LinearLayout item = (LinearLayout) findViewById(R.id.mainView);
View child = getLayoutInflater().inflate(R.layout.progress, null);
item.addView(child);
but instead of adding the "progress.xml", it should remove the current layout and ONLY show "progress.xml".
Do I need an "container" and show/hide mainView/progress?
But that doesn't seem very proper to me...
See also code below (stripped)
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
doSomething();
}
});
}
setContentView(R.layout.view2);
[...]
setContentView(R.layout.view1);
//Listener not more working
Thank you all, for your reply. You made me realize, the onClickListeners are getting lost when I remove or replace (using setContentView()) the main view. I ended up this way now:
onCreate:
setContentView(R.layout.parse);
LinearLayout container = (LinearLayout) findViewById(R.id.container);
container.addView(getLayoutInflater().inflate(R.layout.dialog, null));
container.addView(getLayoutInflater().inflate(R.layout.progress, null));
onStartDoingSomething:
findViewById(R.id.dialog).setVisibility(View.INVISIBLE);
findViewById(R.id.progress).setVisibility(View.VISIBLE);
onEndDoingSomehting:
findViewById(R.id.dialog).setVisibility(View.VISIBLE);
findViewById(R.id.progress).setVisibility(View.INVISIBLE);
I might change View.INVISIBLE to View.GONE, like nmr said, but since I have never used View.GONE, I have to check the Android doku first ;)
Assuming you use 'findViewById' to initialize 'button', you would need to do that every time that you do setContentView(R.layout.view1);
You can only have one UI for each Activity, you should create another activity and in its onCreate method set the content view
Steps:
Create Activity
Use the following code to set the content View:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view2);
}
Define the Activity in the applications manifest as such :
Create an intent in the first Activity:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view1);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
intent();
}
});
}
void intent(){
Intent intent = new Intent();intent.setClass(Activity1.this, Activity2.class);
startActivity(intent);
}
And there you go c:
I know this is a very basic question, however as a newbie i cant get to work around it.
So, I want to have multiple activities to use same the xml layout(consist for example of 1 imagebutton, and multiple textviews with different IDs). Now, for every activity, I want them to view the same layout but override the views with data unique to every activity. What is the best way to do this? And also, the imagebutton should open different URLs in a video player(youtube links).
And can somebody tell me what is the most practical way to learn android programming?
UPDATE
This is my current code:
public class TemakiActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.contentviewer);
}
}
For example I have a textview with ID "descriptionviewer", and a button with ID "videolink", now, how do you code those in?
You can share the same layout file and the set the attributes for views in the onCreate(..) method of each activity.
If you want a different URL to open for each image button you could set it at runtime as follows
public void onCreate(Bundle b) {
Button button =(Button)findViewById(R.id.button);
button.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
//different action for each activity
}
});
}
Yes you can! I had multiple activities inflate the same layout but they save different shared preferences.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.same_layout);
TextView urlDesc = (TextView)findViewById(R.id.descriptionviewer);
urlDesc.setText("url_1"); //now in other activities-- urlDesc.setText("url_2");
ImageButton aButton = (ImageButton)findViewById(R.id.videolink);
aButton.setOnClickListener(aButtonListener);
}
private OnClickListener aButtonListener = new OnClickListener() {
public void onClick(View v) {
// go open url_1 here. In other activities, open url_x, url_y, url_z
finish();
}
};
Same code just swapping the text you want to set for the TextView and url to open in OnClickListener(). No more to change.
I have read through the similar questions but do not see one like this. I have a simple calculator application there are two tabs. Each has their own activity class. I initially wrote this with a button on the first screen which onClick would take the inputs and pass them to the results screen which would do some calculation and then display the results. Now I want to do it with a TabHost. I have the two screens all set, but no idea how to take the inputs and pass them to the results activity to do the calculations and display the resulting values.
Thanks in advance
Dean-O
The most natural way to do this would be to provide your own subclass of android.app.Application and use it to store the shared data. Then the first tab would set the values in the data structure, and the second tab would read them and use them to perform whatever calculation you wanted to do. See here: How to declare global variables in Android?
Assuming you don't want to take this approach and really want to use Intent extras to pass the data between Activities within a TabHost, you could do something like the following hack where you use the TabHosts Intent (accessed via getParent().getIntent()) to pass data back and forth.
public class Tab1 extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tab_one);
Button button = (Button) findViewById(R.id.btn);
button.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
EditText x = (EditText) findViewById(R.id.x);
EditText y = (EditText) findViewById(R.id.y);
int a = Integer.parseInt(x.getText().toString());
int b = Integer.parseInt(y.getText().toString());
Intent i = getParent().getIntent();
i.putExtra("a", a);
i.putExtra("b", b);
i.putExtra("tab", 1);
TabActivity ta = (TabActivity) Tab1.this.getParent();
ta.getTabHost().setCurrentTab(1);
}
});
}
}
public class Tab2 extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView result = new TextView(this);
Intent i = getParent().getIntent();
int a = i.getIntExtra("a", 0);
int b = i.getIntExtra("b", 0);
int sum = a + b;
result.setText(Integer.toString(sum));
setContentView(result);
}
}