Android Open Source - nfcunlocker Add Activity

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Back to project page nfcunlocker.
License

The source code is released under:
Apache License
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Java Source Code

package com.steelrat.nfcunlocker;
//from   w  w w .  j  a  v a 2s  .c  om
import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import com.steelrat.nfcunlocker.helpers.TagsStorage;

import android.app.PendingIntent;
import android.content.Intent;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
import android.widget.TextView;

public class AddActivity extends SherlockActivity {
  NfcAdapter mAdapter;
  PendingIntent mPendingIntent;
  byte[] mId;
  TagsStorage mTags;
  EditText mTagNameEdit;
  TextView mTagIdText;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.activity_add);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    mAdapter = NfcAdapter.getDefaultAdapter(this);
    mTags = new TagsStorage(this);
    mTagNameEdit = (EditText) findViewById(R.id.tagNameEdit);
    mTagIdText = (TextView) findViewById(R.id.tagIdText);
    
    mTagNameEdit.addTextChangedListener(new TextWatcher(){
          public void afterTextChanged(Editable s) {}
          public void beforeTextChanged(CharSequence s, int start, int count, int after){}
          public void onTextChanged(CharSequence s, int start, int before, int count){
            if (s.length() > 0 && mTagNameEdit.getError() != null) {
                mTagNameEdit.setError(null);
              }
          }
      });
    
    // Create a generic PendingIntent that will be deliver to this activity.
    // The NFC stack
    // will fill in the intent with the details of the discovered tag before
    // delivering to
    // this activity.
    mPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
        getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
  }

  @Override
  public void onResume() {
    super.onResume();
    if (mAdapter != null)
      mAdapter.enableForegroundDispatch(this, mPendingIntent, null, null);
  }

  @Override
  public void onNewIntent(Intent intent) {
    mId = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
    mTagIdText.setText(TagsStorage.bytesToHex(mId));
    mTagIdText.setError(null);
  }

  @Override
  public void onPause() {
    super.onPause();
    if (mAdapter != null)
      mAdapter.disableForegroundDispatch(this);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getSupportMenuInflater().inflate(R.menu.add, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
      case android.R.id.home:
        NavUtils.navigateUpFromSameTask(this);
        return true;
      case R.id.action_save:
        if (saveTag()) {
          NavUtils.navigateUpFromSameTask(this);
        }
        break;
      default:
        return super.onOptionsItemSelected(item);
    }

    return true;
  }
  
  private boolean saveTag() {
    String text = mTagNameEdit.getText().toString();
    if (text.isEmpty()) {
      mTagNameEdit.setError(getString(R.string.error_empty_tag_name));
      return false;
    } else if (mId == null) {
      mTagIdText.requestFocus();
      mTagIdText.setError(getString(R.string.error_no_tag_scanned));
      return false;
    }
    
    mTags.addTag(mTagNameEdit.getText().toString(), mId);
    
    return true;
  }
}
Java Source Code List
