Android Open Source - android.app.niuz.io Main Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package io.niuz;
//from   w w  w.  j a  va  2 s  .c  o  m
import io.niuz.model.APIRetrievalStatus;
import io.niuz.model.InitUserStatus;
import io.niuz.services.CategoriesSubcategoriesService;
import io.niuz.services.UserService;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends Activity {
  private final String textInitializingPhone = "Initializing phone...";
  private final String textInitializingCategories = "Syncing categories...";
  private final String textInitializingSubcategories = "Syncing subcategories...";
  private final String failedInitializingUser = "Failed to initialize new user!";
  private final String failedInitializingCategories = "Failed to download categories!";
  private final String failedInitializingSubcategories = "Failed to download subcategories!";
  private final String welcomeBack = "Welcome back...";
  private final String syncComplete = "Syncing has been completed!";
  
  private TextView loadingText;
  private ProgressBar progressBar;
  
  private Context context;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    this.context = this;
    
    // Setting up the text
    this.loadingText = (TextView)findViewById(R.id.maLoadingText);
    this.loadingText.setText(this.textInitializingPhone);
    
    // Setting up the loader
    this.progressBar = (ProgressBar)findViewById(R.id.maProgressBar);
    this.progressBar.setVisibility(View.VISIBLE);
    
    // Check if user exists and inform in UI
    this.checkUserAndInform();
  }
  
  private void checkUserAndInform() {
    new InitUserTask().execute();
  }
  
  private void transferToInitCategoriesActivity() {
    startActivity(new Intent(this, CategoriesSelectionActivity.class));
  }
  
  private void transferToNewsHeadersActivity() {
    startActivity(new Intent(this, NewsHeadersActivity.class));
  }
  
  private class RetrieveSubcategoriesTask extends AsyncTask<String, Integer, APIRetrievalStatus> {

    @Override
    protected APIRetrievalStatus doInBackground(String... params) {
      try {
        CategoriesSubcategoriesService.initSubcategories();
        return APIRetrievalStatus.SUCCESS;
        
      } catch (Exception e) {
        e.printStackTrace();
        Log.d("error", e.getMessage());
        return APIRetrievalStatus.ERROR;
        
      }
    }
    
    @Override
    protected void onPostExecute(APIRetrievalStatus result) {
      switch (result) {
      case SUCCESS:
        loadingText.setText(syncComplete);
        transferToInitCategoriesActivity();
        break;

      case ERROR:
        progressBar.setVisibility(View.GONE);
        loadingText.setText(failedInitializingSubcategories);
      }
    }
  }
  
  private class RetrieveCategoriesTask extends AsyncTask<String, Integer, APIRetrievalStatus> {
    @Override
    protected APIRetrievalStatus doInBackground(String... arg0) {
      try {
        CategoriesSubcategoriesService.initCategories();
        return APIRetrievalStatus.SUCCESS;
        
      } catch (Exception e) {
        e.printStackTrace();
        Log.d("error", e.getMessage());
        return APIRetrievalStatus.ERROR;
      }
    }
    
    @Override
    protected void onPostExecute(APIRetrievalStatus result) {
      switch (result) {
      case SUCCESS:
        loadingText.setText(textInitializingSubcategories);
        new RetrieveSubcategoriesTask().execute();
        break;

      case ERROR:
        progressBar.setVisibility(View.GONE);
        loadingText.setText(failedInitializingCategories);
      }
    }
  }
  
  private class InitUserTask extends AsyncTask<Object, Integer, InitUserStatus> {
    @Override
    protected InitUserStatus doInBackground(Object... params) {
      try {
        return UserService.initUser(context)
          ? InitUserStatus.NEW
          : InitUserStatus.OLD;
        
      } catch (Exception e) {
        e.printStackTrace();
        Log.d("error", e.getMessage());
        return InitUserStatus.ERROR;
      }
    }

    @Override
    protected void onPostExecute(InitUserStatus result) {
      switch (result) {
      case NEW:
        loadingText.setText(textInitializingCategories);
        new RetrieveCategoriesTask().execute();
        break;
        
      case OLD:
        loadingText.setText(welcomeBack);
        transferToNewsHeadersActivity();
        break;
        
      case ERROR:
        progressBar.setVisibility(View.GONE);
        loadingText.setText(failedInitializingUser);
      }
    }
  }
  
  @Override
  public void onBackPressed() {
    startActivity(new Intent(context, PreMainActivity.class));
  }
}

Java Source Code List

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