Android Open Source - LearningAndroid2edYamba2 Status Fragment

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License

The source code is released under:

Apache License

Java Source Code

package com.marakana.android.yamba;
/*w w  w .jav  a 2s. co m*/
import java.util.Locale;

import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.marakana.android.yamba.clientlib.YambaClient;

public class StatusFragment extends Fragment implements OnInitListener {
  private static final String TAG = StatusFragment.class.getSimpleName();
  private static final String PROVIDER = LocationManager.GPS_PROVIDER;
  private Button mButtonTweet;
  private EditText mTextStatus;
  private TextView mTextCount;
  private int mDefaultColor;
  private LocationManager locationManager;
  private static Location location;

  private TextToSpeech mTts; // clk: TextToSpeech to say status-text

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    locationManager = (LocationManager) getActivity().getSystemService(
        Context.LOCATION_SERVICE);
    location = locationManager.getLastKnownLocation(PROVIDER);
  }

  @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        // clk: TTS needs a Context (or Activity) in constructor, so do this in onActivityCreated()
        mTts = new TextToSpeech(getActivity(), this);
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        // clk: release TTS resources here rather than in onDestroy(), since from here fragment
        //  can be returned to layout from the back stack and does not go through onDestroy()
        if (mTts != null) mTts.shutdown();
    }

    @Override
  public void onResume() {
    super.onResume();
    locationManager.requestLocationUpdates(PROVIDER, 60000, 1000,
        LOCATION_LISTENER);
  }

  @Override
  public void onPause() {
    super.onPause();
    locationManager.removeUpdates(LOCATION_LISTENER);
  }

  private static final LocationListener LOCATION_LISTENER = new LocationListener() {
    @Override
    public void onLocationChanged(Location l) {
      location = l;
    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }
  };

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_status, container, false);
    // clk: fix to pass in container instead of null, following
    //  http://developer.android.com/guide/components/fragments.html

    mButtonTweet = (Button) v.findViewById(R.id.status_button_tweet);
    mTextStatus = (EditText) v.findViewById(R.id.status_text);
    mTextCount = (TextView) v.findViewById(R.id.status_text_count);
    mTextCount.setText(Integer.toString(140));
    mDefaultColor = mTextCount.getTextColors().getDefaultColor();

    mButtonTweet.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        String status = mTextStatus.getText().toString();
        PostTask postTask = new PostTask();
        postTask.execute(status);
        Log.d(TAG, "onClicked");
      }

    });

    mTextStatus.addTextChangedListener(new TextWatcher() {

      @Override
      public void afterTextChanged(Editable s) {
        int count = 140 - s.length();
        mTextCount.setText(Integer.toString(count));

        if (count < 50) {
          mTextCount.setTextColor(Color.RED);
        } else {
          mTextCount.setTextColor(mDefaultColor);
        }
      }

      @Override
      public void beforeTextChanged(CharSequence s, int start, int count,
          int after) {
      }

      @Override
      public void onTextChanged(CharSequence s, int start, int before,
          int count) {
      }

    });

    Log.d(TAG, "onCreated");

    return v;
  }

    // clk: TextToSpeech initialization callback
    @Override
    public void onInit(int status) {
        if (status==TextToSpeech.SUCCESS) {
            int retCode = mTts.setLanguage(Locale.getDefault());
            if (retCode == TextToSpeech.LANG_COUNTRY_AVAILABLE) {
                // good to go
                return;
            } else {
                // missing data for language, so install it
                Intent install = new Intent(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
                startActivity(install);
            }
        } else {
            Toast.makeText(getActivity(), "TTS initialization Failed", Toast.LENGTH_LONG).show();
            Log.e(TAG, "onInit() status code " + status + " was Not Success");
        }
    }

    class PostTask extends AsyncTask<String, Void, String> {
    private ProgressDialog progress;

    @Override
    protected void onPreExecute() {
      progress = ProgressDialog.show(getActivity(), "Posting",
          "Please wait...");
      progress.setCancelable(true);
    }

    // Executes on a non-UI thread
    @Override
    protected String doInBackground(String... params) {
      try {
        SharedPreferences prefs = PreferenceManager
            .getDefaultSharedPreferences(getActivity());
        String username = prefs.getString("username", "");
        String password = prefs.getString("password", "");

        // Check that username and password are not empty
        // If empty, Toast a message to set login info and bounce to
        // SettingActivity
        // Hint: TextUtils.
        if (TextUtils.isEmpty(username) || TextUtils.isEmpty(password)) {
          getActivity().startActivity(
              new Intent(getActivity(), SettingsActivity.class));
          return "Please update your username and password";
        }

        YambaClient cloud = new YambaClient(username, password,
                RefreshService.YAMBA_API_ROOT); // clk: instead of always using built-in default api-root
        if (location != null) {
          cloud.postStatus(params[0], location.getLatitude(),
              location.getLongitude());
        } else {
          cloud.postStatus(params[0]);
        }

        Log.d(TAG, "Successfully posted to the cloud: " + params[0]);
        return params[0]; // clk: return the status-text so that we can say it

      } catch (Exception e) {
        Log.e(TAG, "Failed to post to the cloud", e);
        e.printStackTrace();
        return "Failed to post";
      }
    }

    // Called after doInBackground() on UI thread
    @Override
    protected void onPostExecute(String result) {
      progress.dismiss();

            if (mTts != null)
                mTts.speak(result, TextToSpeech.QUEUE_FLUSH, null); // clk: say the status-text posted
            if (getActivity() != null && result != null)
                Toast.makeText(getActivity(), "Successfully posted", Toast.LENGTH_LONG).show();
    }

  }
}

Java Source Code List

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