Develop Reference

React-native Android Splashscreen - Custom fonts

I created a splashscreen for my react-native app and have to implement TextView with custom fonts.
I created an Android layout specifically for the splashscreen with res/layout/launch_screen.xml and the TextViews appears but without custom fonts then i launch that on splashActivity file.
But it's strange because when i inject the layout directly on the mainActivity file the fonts seems be loaded.
So i think it's due to the fonts path in SplashActivity file but the code seems be ok.
Here are the files :
SplashActivity.js :
package com.app;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
import android.graphics.Typeface;
import android.content.res.AssetManager;
public class SplashActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.launch_screen);
TextView txt_1 = (TextView) findViewById(R.id.din_bold);
Typeface font_1 = Typeface.createFromAsset(getAssets(), "fonts/DinCondBold.otf");
txt_1.setTypeface(font_1);
TextView txt_2 = (TextView) findViewById(R.id.din_light);
Typeface font_2 = Typeface.createFromAsset(getAssets(), "fonts/DinCondLight.otf");
txt_2.setTypeface(font_2);
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
finish();
}
}
MainActivity.js
package com.app;
import android.app.Activity;
import com.facebook.react.ReactActivity;
import android.os.Bundle;
import org.devio.rn.splashscreen.SplashScreen;
public class MainActivity extends ReactActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SplashScreen.show(this, R.style.SplashScreenTheme);
}
/**
* Returns the name of the main component registered from JavaScript.
* This is used to schedule rendering of the component.
*/
#Override
protected String getMainComponentName() {
return "app";
}
}
And launch_screen.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/background"
android:gravity="center"
android:orientation="vertical"
tools:context="com.mitsu.MainActivity">
<TextView
android:id="#+id/din_bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SCAN PRODUITS"
android:textColor="#eb212e"
android:textSize="36sp"
android:textStyle="bold" />
<TextView
android:id="#+id/din_light"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="BIENVENUE"
android:textColor="#717171"
android:textSize="36sp" />
<ImageView
android:layout_width="180dp"
android:layout_height="180dp"
android:layout_marginTop="14dp"
android:src="#drawable/splash_logo" />
</LinearLayout>
Does anyone know what's going on?

Call an activity from a listViewItem Without losing the tabNavigation

I'm noob on android development, and im trying to do a simple app, for details about certain products and stuff.
i have the the following layout:
<android.support.v4.app.FragmentTabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"/>
<FrameLayout
android:id="#+android:id/realtabcontent"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<TabWidget
android:id="#android:id/tabs"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
/>
</LinearLayout>
</android.support.v4.app.FragmentTabHost>
There are 2 tabs on that tabHost navigation, each one extends fragment like this
package co.com.smartmedia.vademecumtg;
import co.com.smartmedia.vademecumtg.R;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class LineasTab extends Fragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.tab2, container, false);
}
}
In the first tab of that navigation i have a listView, and each item of that list, must call another activity that will show details about it.
im calling a new activity by calling this method from an itemClickListener:
public void intentForMedView(int pos){
Log.w("debbuging", "start");
Intent intent = new Intent(getActivity().getApplicationContext(), MedViewActivity.class);
intent.putExtra(EXTRA_MEDTITLE, array_sort.get(pos).getNombre());
intent.putExtra(EXTRA_MEDCONTENT, array_sort.get(pos).getLinea());
Log.w("debbuging", "send intent"+intent);
startActivity(intent);
}
and the activity that i'm calling is the following:
package co.com.smartmedia.vademecumtg;
import co.com.smartmedia.vademecumtg.R;
import android.app.Activity;
import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MedViewActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_med_view);
Intent intent = getIntent();
String title = intent.getStringExtra(MedicamentosTab.EXTRA_MEDTITLE);
setTitle(title);
TextView text = (TextView) findViewById(R.id.text);
String lineName = intent.getStringExtra(MedicamentosTab.EXTRA_MEDCONTENT);
text.setText(lineName);
}
}
My problem is:
When the detail activity is shown, my navigation Disappears (the tabHost navigation), and i don't want it....
some tips or ways to do it ?
thaks...

I got the answer now, The way to accomplish this architecture, is to use FragmentTransaction
http://developer.android.com/guide/components/fragments.html
Cause it isn't necessary another activity... just play with the fragments of the UI.
FragmentManager fragmentManager = getFragmentManager()
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
And take care with the android version cause android.support.v4.app.FragmentManager cannot cast to the android.app.FragmentManager
Hope this be usefull

How to make android buttons switch different XML layouts?

I just started some android programming recently and I am creating a small project app.
I have a few different XML Layout files and want my button to go to that layout. However, when I press the button on the emulator I get this message "Unfortunately "MyApp" Has stopped".
Here is my Main Activity Class:
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Shows the Activities screen.
Button Button1=(Button)findViewById(R.id.Button1);
Button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(MainActivity.this,ActivityList.class);
startActivity(i);
}
});
}
This is my XML CODE for the Button:
android:id="#+id/Button1"
android:layout_width="300dp"
android:layout_height="55dp"
android:layout_alignLeft="#+id/Menutxt"
android:layout_below="#+id/Menutxt"
android:layout_marginTop="20dp"
android:gravity="center"
android:text="#string/Choose_Activity"
android:textColor="#ffffffff"
android:textSize="25sp"
android:typeface="serif"
I was wondering if anyone could help me out here, been trying to do this for a few hours and cannot get past it. Thanks.

add this to the layout of the activity that you wish to open. it should go at the top: tools:context=".activity" >
e.g.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context=".activity" >
replace "activity" with the name of your activity

You did not show us your ActivityList.class , maybe you have created and extends Activity, but make sure that in your AndroidManifest.xml has this code:
activity android:name=".ActivityList"

Getting a False return from listview

I am getting a false return when implementing a listview within a framelayout/tab layout. For the life of me I can't seem to figure out why I am getting a false return on my app when implementing a listview. The code works on a external project but I cant seem to intergrate it into this one. I will list the main activity groups used within the project and the xml file for the page that the string is meant to appear on. Sorry its alot of code but this has been driving me insane over the last few days cause it should be relatively simple.
The xml layout files are held in framelayout coding within the main.xml(which is not shown) so have I got the ID wrong when referencing? Any help to solve this problem would be amazing as I know its a really simple solution that Im just missing. Thanks guys.
If I havnt explained it well a picturee of the error is below
View the page here http://i41.tinypic.com/do04ee.png
Their are no log errors.
Main Activity
(Please note I have removed code to make it more relavant and clear and to show the links from activity to activity)
package workout.fitty;
import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.widget.TabHost;
public class WorkoutFittyActivity extends TabActivity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Resources res = getResources(); // Resource object to get Drawables
TabHost tabHost = getTabHost(); // The activity TabHost
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// More
**intent = new Intent().setClass(this, MoreActivity.class);
spec = tabHost.newTabSpec("songs").setIndicator("More",
res.getDrawable(R.drawable.tab_more))
.setContent(intent);
tabHost.addTab(spec);**
tabHost.setCurrentTab(1);
}
}
MoreActivity
package workout.fitty;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class MoreActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.more_layout);
Intent Intent = new Intent(this, MyListActivity.class);
}
}
MyListActivity
package workout.fitty;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MyListActivity extends ListActivity {
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
String[] values = new String[] { "BMI", "Body Measurements", "Logs",
"Feedback", "How To Use", "About" };
// Use your own layout
**ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.more_layout, R.id.label, values);
setListAdapter(adapter);**
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
String item = (String) getListAdapter().getItem(position);
Toast.makeText(this, item + " selected", Toast.LENGTH_LONG).show();
}
}
And the XML file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/icon"
android:layout_width="22px"
android:layout_height="22px"
android:layout_marginLeft="4px"
android:layout_marginRight="10px"
android:layout_marginTop="4px"
android:src="#drawable/ic_launcher" >
</ImageView>
<TextView
android:id="#+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#+id/label"
android:textSize="20px" >
</TextView>
</LinearLayout>
Main XML File with container and framelayout
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp" />
</LinearLayout>
</TabHost>

change your:
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.more_layout, R.id.label, values);
in
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.more_layout, values);

Runtime Android exception after pressing a button to go to next Activity

I have this code:
package com.problemio;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class ProblemioActivity extends Activity
{
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button addProblemButton = (Button)findViewById(R.id.add_problem_button);
Button browseProblemsButton = (Button)findViewById(R.id.browse_problems_button);
Button searchProblemsButton = (Button)findViewById(R.id.search_problems_button);
Button myProblemsButton = (Button)findViewById(R.id.my_problems_button);
addProblemButton.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v) {
Intent myIntent = new Intent(ProblemioActivity.this, AddProblemActivity.class);
ProblemioActivity.this.startActivity(myIntent);
}
});
}
}
It compiles fine and displays the addProblemButton button, but when that button is clicked, the system gives a runtime exception.
Here is the AddProblemActivity class:
package com.problemio;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class AddProblemActivity extends Activity
{
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//TextView text = (TextView) dialog.findViewById(R.id.addProblemText);
//text.setText(R.string.addProblemText);
TextView tv = new TextView(this);
tv.setText("Please Add a Problem");
setContentView(tv);
}
}
and here is the layout main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_height="wrap_content"
android:text="First, add the problem you want to solve!"
/>
<TextView
android:id="#+id/add_problem_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Add a Problem You Want To See Solved"
/>
<Button
android:id="#+id/add_problem_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Add a Problem"
/>
<Button
android:id="#+id/browse_problems_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Browse Problems"
/>
<Button
android:id="#+id/search_problems_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Search Problems"
/>
<Button
android:id="#+id/my_problems_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="View My Problems"
/>
</LinearLayout>
any idea what might be going wrong? By the way, I can't seem to locate the stack trace of the exception. Where should I look for that in Eclipse? All it currently shows me is AndroidRuntimeException - dalvik.system.NativeStart.main
Thanks!!

The only problem I can think of is that your Activity "AddProblemActivity" is not register in the manifest.
See the logs under LogCat...you will find it in Window >Show View >Android > LogCat