im creating an app for reading and writing a nfc tag, for that I created a tab menu, with 4 tabs.
this app hava a custom title bar, and a image on the background.
im trying to run this app in an api 16.
when tab3 is pressed everything appear correctly , my custom title bar, my background and the 4 tabs below. Inside this tab I have a textbox, and a button, on button click the text in the textbox should be passed to the nfc tag, and if not it should read the tag data.
what happens is that when I click in the buttom instead of writing to the tag, its reading, and when it reads the tag, the activity that is started is the tags activity, but the layout is wrong, it only appears the activity title defined in the manifest, a black blackground and the textbox and button. then if I click in the button to write to the tag , it works, and and reads the tags if button is not clicked.
Now ive created a fourth tab that has a button inside, and if the button is clicked it starts a new activity, and this tagsactivity works well.
Is the problem related to the use of tagsactivity in a api16, when this class is deprecated after api13?
Or is it another thing that a im missing.
here is tabs2
import android.app.LocalActivityManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TabHost;
public class Tabs2 extends android.app.TabActivity{
public TabHost tabHost;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.activity_tabs);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.mytitle);
// Get the tabHost
this.tabHost = getTabHost();
Button btentrar= (Button) findViewById(R.id.titlebarRefreshBtn);
btentrar.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
setResult(2);
finish();
}
});
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// Create an Intent to launch the first Activity for the tab (to be reused)
intent = new Intent().setClass(this, FirstGroup.class);
// Initialize a TabSpec for the first tab and add it to the TabHost
spec = tabHost.newTabSpec("Opcções").setIndicator("FirstGroup",
getResources().getDrawable(R.drawable.settingsicon)) // Replace null with R.drawable.your_icon to set tab icon
.setContent(intent);
tabHost.addTab(spec);
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, SecondActivityGroup.class);
// Initialize a TabSpec for the second tab and add it to the TabHost
spec = tabHost.newTabSpec("Tags passadas").setIndicator("Tags Passadas",
getResources().getDrawable(R.drawable.writedocumenticon)) // Replace null with R.drawable.your_icon to set tab icon
.setContent(intent);
tabHost.addTab(spec);
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, ThirdActivityGroup.class);
// Initialize a TabSpec for the second tab and add it to the TabHost
spec = tabHost.newTabSpec("Read and write").setIndicator("Ler e escrever",
getResources().getDrawable(R.drawable.checkiconm)) // Replace null with R.drawable.your_icon to set tab icon
.setContent(intent);
tabHost.addTab(spec);
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, FourthActivityGroup.class);
// Initialize a TabSpec for the second tab and add it to the TabHost
spec = tabHost.newTabSpec("Read and write v2").setIndicator("Ler e escrever v2",
getResources().getDrawable(R.drawable.checkiconm)) // Replace null with R.drawable.your_icon to set tab icon
.setContent(intent);
tabHost.addTab(spec);
tabHost.setCurrentTab(0);
}
}
here is thirdactivitygroup that extends activitygroup
import java.util.ArrayList;
import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class ThirdActivityGroup extends ActivityGroup {
// Keep this in a static variable to make it accessible for all the nested activities, lets them manipulate the view
public static ThirdActivityGroup group;
// Need to keep track of the history if you want the back-button to work properly, don't use this if your activities requires a lot of memory.
private ArrayList<View> history;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.history = new ArrayList<View>();
group = this;
// Start the root activity withing the group and get its view
View view = getLocalActivityManager().startActivity("TagsActivity", new
Intent(this,TagsActivity.class)
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
.getDecorView();
// Replace the view of this ActivityGroup
replaceView(view);
}
public void replaceView(View v) {
// Adds the old one to history
history.add(v);
// Changes this Groups View to the new View.
setContentView(v);
}
public void back() {
if(history.size() > 0) {
history.remove(history.size()-1);
setContentView(history.get(history.size()-1));
}else {
finish();
}
}
public void onBackPressed() {
ThirdActivityGroup.group.back();
return;
}
}
and here is fourthactivitygroup
import java.util.ArrayList;
import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class FourthActivityGroup extends ActivityGroup {
// Keep this in a static variable to make it accessible for all the nested activities, lets them manipulate the view
public static FourthActivityGroup group;
// Need to keep track of the history if you want the back-button to work properly, don't use this if your activities requires a lot of memory.
private ArrayList<View> history;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.history = new ArrayList<View>();
group = this;
// Start the root activity withing the group and get its view
View view = getLocalActivityManager().startActivity("Teste", new
Intent(this,Teste.class)
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
.getDecorView();
// Replace the view of this ActivityGroup
replaceView(view);
}
public void replaceView(View v) {
// Adds the old one to history
history.add(v);
// Changes this Groups View to the new View.
setContentView(v);
}
public void back() {
if(history.size() > 0) {
history.remove(history.size()-1);
setContentView(history.get(history.size()-1));
}else {
finish();
}
}
public void onBackPressed() {
FourthActivityGroup.group.back();
return;
}
}
here is teste
import java.util.ArrayList;
import android.app.Activity;
import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.Button;
public class Teste extends Activity {
// Keep this in a static variable to make it accessible for all the nested activities, lets them manipulate the view
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_teste);
Button btnfc= (Button) findViewById(R.id.button1);
btnfc.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(Teste.this, TagsActivity.class));
}
});
}
}
and here is the tagsactivity
public class TagsActivity extends Activity {
private NfcAdapter mNfcAdapter;
private Button mEnableWriteButton;
private EditText mTextField;
private ProgressBar mProgressBar;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tags);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.mytitle);
mTextField = (EditText) findViewById(R.id.text_field);
mProgressBar = (ProgressBar) findViewById(R.id.progress_bar);
mProgressBar.setVisibility(View.GONE);
mEnableWriteButton = (Button) findViewById(R.id.enable_write_button);
mEnableWriteButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
setTagWriteReady(!isWriteReady);
mProgressBar.setVisibility(isWriteReady ? View.VISIBLE : View.GONE);
}
});
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter == null) {
Toast.makeText(this, "Sorry, NFC is not available on this device", Toast.LENGTH_SHORT).show();
finish();
}
}
private boolean isWriteReady = false;
/**
* Enable this activity to write to a tag
*
* @param isWriteReady
*/
public void setTagWriteReady(boolean isWriteReady) {
this.isWriteReady = isWriteReady;
if (isWriteReady) {
IntentFilter[] writeTagFilters = new IntentFilter[] { new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED) };
mNfcAdapter.enableForegroundDispatch(TagsActivity.this, NfcUtils.getPendingIntent(TagsActivity.this),
writeTagFilters, null);
} else {
// Disable dispatch if not writing tags
mNfcAdapter.disableForegroundDispatch(TagsActivity.this);
}
mProgressBar.setVisibility(isWriteReady ? View.VISIBLE : View.GONE);
}
@Override
public void onNewIntent(Intent intent) {
// onResume gets called after this to handle the intent
setIntent(intent);
}
@Override
public void onResume() {
super.onResume();
if (isWriteReady && NfcAdapter.ACTION_TAG_DISCOVERED.equals(getIntent().getAction())) {
processWriteIntent(getIntent());
} else if (!isWriteReady
&& (NfcAdapter.ACTION_TAG_DISCOVERED.equals(getIntent().getAction()) || NfcAdapter.ACTION_NDEF_DISCOVERED
.equals(getIntent().getAction()))) {
processReadIntent(getIntent());
}
}
private static final String MIME_TYPE = "application/com.smartcom.onetagv4";
/**
* Write to an NFC tag; reacting to an intent generated from foreground
* dispatch requesting a write
*
* @param intent
*/
public void processWriteIntent(Intent intent) {
if (isWriteReady && NfcAdapter.ACTION_TAG_DISCOVERED.equals(getIntent().getAction())) {
Tag detectedTag = getIntent().getParcelableExtra(NfcAdapter.EXTRA_TAG);
String tagWriteMessage = mTextField.getText().toString();
byte[] payload = new String(tagWriteMessage).getBytes();
if (detectedTag != null && NfcUtils.writeTag(
NfcUtils.createMessage(MIME_TYPE, payload), detectedTag)) {
Toast.makeText(this, "Wrote '" + tagWriteMessage + "' to a tag!",
Toast.LENGTH_LONG).show();
setTagWriteReady(false);
} else {
Toast.makeText(this, "Write failed. Please try again.", Toast.LENGTH_LONG).show();
}
}
}
public void processReadIntent(Intent intent) {
List<NdefMessage> intentMessages = NfcUtils.getMessagesFromIntent(intent);
List<String> payloadStrings = new ArrayList<String>(intentMessages.size());
for (NdefMessage message : intentMessages) {
for (NdefRecord record : message.getRecords()) {
byte[] payload = record.getPayload();
String payloadString = new String(payload);
if (!TextUtils.isEmpty(payloadString))
payloadStrings.add(payloadString);
}
}
if (!payloadStrings.isEmpty()) {
String content = TextUtils.join(",", payloadStrings);
Toast.makeText(TagsActivity.this, "Read from tag: " + content,
Toast.LENGTH_LONG).show();
}
}
}
