[Q] Changing a textview in a seperate Activity? - Android Q&A, Help & Troubleshooting

Hey guys,
I am trying to change textview properties of a textview that looks like this:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
In a seperate Activity that looks like this:
I tried to do this with bundles but I can't get it to work.
This is how my BookActivity looks like:
Code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.book_activity);
//this is where the size property comes in
Integer size = getIntent().getExtras().getInt("SGRkey");
TextView test2 = (TextView) findViewById(R.id.booktext);
test2.setTextSize(size);
Spinner spinner = (Spinner) findViewById(R.id.kapitelspinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.kapitel_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new MyOnItemSelectedListener());
}
public class MyOnItemSelectedListener implements OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
Toast.makeText(parent.getContext(),
parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
final String[] theporn = getResources().getStringArray(R.array.allkapitel);
TextView text = (TextView) findViewById(R.id.booktext);
text.setText(theporn[pos]);
}
public void onNothingSelected(AdapterView parent) {
// Do nothing.
}
(i pick the chapter string in the spinner and that works just fine.)
And this is how my SettingsActivity looks like:
Code:
public class SettingsActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_view);
Spinner SGRspinner = (Spinner) findViewById(R.id.schriftgroeße_spinner);
ArrayAdapter<CharSequence> SGRadapter = ArrayAdapter.createFromResource(
this, R.array.schriftgroesse_list, android.R.layout.simple_spinner_item);
SGRadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
SGRspinner.setAdapter(SGRadapter);
}
public class SGROnItemSelectedListener implements OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
Intent answer = new Intent();
Toast.makeText(parent.getContext(),
parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
final String[] SGRstring = getResources().getStringArray(R.array.schriftgroesse_list);
int SGRint = Integer.parseInt(SGRstring[pos]);
Bundle size = new Bundle();
size.putInt("SGRkey", SGRint);
Intent nextActivity = new Intent(com.asm.reader.SettingsActivity.this, com.asm.reader.BookActivity.class);
nextActivity.putExtras(size);
com.asm.reader.SettingsActivity.this.startActivity(nextActivity);
}
public void onNothingSelected(AdapterView parent) {
// Do nothing.
}
}
I get an error when I try this. All activities are declared in the manifest. I really don't know how to go on. I'm pretty new to this, so sorry if this is something simple, but any help would be greatly appreciated!!

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What is the error and where does it occur? Have you tried stepping through with the debugger?

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I think it would be better if you'd do your layout on xml.
Sent from my SGH-T959 using XDA App

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Try using a PreferenceActivity instead of an Activity for your settings. Then tie in SharedPreferences so that a value there can be edited and displayed by two activities. One will write the value and the other will read it
also... your code seems to have a bunch of useless stuff. in your SGROnItemSelectedListener you have an Intent you never use Intent answer = new Intent();
I don't see an onRecieve() to do anything with the intent you sent
From something awesome

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first of all, thanks for the replies!
when I run the application, it says it has stopped unexpectedly.
the debugger says this:
@iynfynity
I have my layout in xml. im trying to change it with the settings activity
@killersnowman
the google dev guide says that prior to honeycomb, the class only allows a single preference. do you think that would interfere with what i wanna do? (since i wanna make the app available for API level 4 or so. thanks for the advice!

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I'm trying to figure out the flow of things here.
So I'm assuming that your app launches and you get the tab bar shown and "Home" is the default activity (and its code is the first code block) and it starts normally. Now you hit the "Settings" tab and its activity (and its code is in the second block) starts OK, then you "Select Max Size" (assuming my rusty German is correct), set it to 8, and you want this "size" to be used to change the font size (guessing here) of the textview in the "Home" activity?
If so, then I don't think you are doing this right. The code in the settings tab's activity should not try to relaunch the home activity. You should save the settings value somewhere (like a preference class) then when the Home activity is reactivated (by the user clicking back to that tab) you should read the preferences and adjust your textview using the saved value.

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Gene Poole said:
If so, then I don't think you are doing this right. The code in the settings tab's activity should not try to relaunch the home activity. You should save the settings value somewhere (like a preference class) then when the Home activity is reactivated (by the user clicking back to that tab) you should read the preferences and adjust your textview using the saved value.
Click to expand...
Click to collapse
yep. thats what i was trying to say so inelegantly on my mobile

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Gene Poole said:
I'm trying to figure out the flow of things here.
So I'm assuming that your app launches and you get the tab bar shown and "Home" is the default activity (and its code is the first code block) and it starts normally. Now you hit the "Settings" tab and its activity (and its code is in the second block) starts OK, then you "Select Max Size" (assuming my rusty German is correct), set it to 8, and you want this "size" to be used to change the font size (guessing here) of the textview in the "Home" activity?
thats exactly how i want it
If so, then I don't think you are doing this right. The code in the settings tab's activity should not try to relaunch the home activity. You should save the settings value somewhere (like a preference class) then when the Home activity is reactivated (by the user clicking back to that tab) you should read the preferences and adjust your textview using the saved value.
thank you very much!
Click to expand...
Click to collapse
I will try it out as soon as i get home from work tonight

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I am really puzzled by the coding part of this.
The dev reference looks convoluted and it gets me really confused. I'm sorry that I am such a newbie at this but I couldn't find any good guides out there that helped me. All I got so far is the XML part of it:
Code:
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="Einstellungen am Text">
<ListPreference
android:title="Schriftgröße"
android:summary="Passen Sie die Schriftgröße ihres Textes an"
android:key="schriftgroesse"
android:defaultValue="8"
android:entries="@array/schriftgroesse_list"
android:entryValues="@array/schriftgroesse_values" />
<ListPreference
android:title="Schriftfarbe"
android:summary="Passen Sie die Farbe ihres Textes an"
android:key="schriftfarbe"
android:defaultValue="#ffffff"
android:entries="@array/schriftfarbe_list"
android:entryValues="@array/schriftfarbe_values" />
<ListPreference
android:title="Hintergrundfarbe"
android:summary="Passen Sie den Hintergrund an"
android:key="schriftfarbe"
android:defaultValue="#000000"
android:entries="@array/hintergrundfarbe_list"
android:entryValues="@array/hintergrundfarbe_values" />
</PreferenceCategory>
</PreferenceScreen>
(I know, nothing really..)
It would be very much appreciated if someone could help me !

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I am stuck on the color setting
Code:
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
TextView text = (TextView) findViewById(R.id.booktext);
SharedPreferences PRFSize=PreferenceManager.getDefaultSharedPreferences(this);
String Size = PRFSize.getString("schriftgroesse", "8");
SharedPreferences PRFColor=PreferenceManager.getDefaultSharedPreferences(this);
String Color = PRFColor.getString("schriftfarbe", "#ffffff");
Integer SizeInt = Integer.parseInt(Size);
text.setTextSize(SizeInt);
//now what?
text.setTextColor();
Context context = getApplicationContext();
CharSequence hello = Size;
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, hello, duration);
toast.show();
}
How do I convert the String (Color) to an interger/float to get it to work for the method setTextColor?? I always get an error when I try to do
Code:
Integer.parseInt( string );
..
I am puzzled

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Why not load/save to SharedPreferences as an integer (use Editor.putInt() and getInt() )?

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Okay, sorry for the quadriple post, but I got it all now. Thanks for all the help!