Android Open Source - Give-Me-Ltc-Android-App Main Activity

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License

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

package com.hpritch5.give_me_ltc;
/*www . jav  a  2  s  .  com*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.DecimalFormat;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.google.cloud.backend.android.R;

public class MainActivity extends Activity {
  
  TextView mUsername, mConfirmedRewards, mRoundEstimate, mTotalHashrate, mPayoutHistory, mRoundShares;
  HttpClient client;
  
  final static String URL_STRING = "https://give-me-ltc.com/api?api_key=";
  String st_apiKey = "";
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    mUsername = (TextView)findViewById(R.id.mUsername);
    mPayoutHistory = (TextView)findViewById(R.id.mPayoutHistory);
    mConfirmedRewards = (TextView)findViewById(R.id.mConfirmedRewards);
    mRoundShares = (TextView)findViewById(R.id.mRoundShares);
    mRoundEstimate = (TextView)findViewById(R.id.mRoundEstimate);
    mTotalHashrate = (TextView)findViewById(R.id.mTotalHashrate);
    
    
    Button refreshButton = (Button)findViewById(R.id.btRefresh);
    refreshButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        refreshView();
      }
    });
    
    // Initialize
    refreshView();

  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
          case R.id.action_options:
              apiKeyDialog();
              return true;
          case R.id.action_about:
              aboutDialog();
              return true;
          case R.id.action_chat:
            Intent intent = new Intent(MainActivity.this, ChatActivity.class);
            startActivity(intent);
          default:
              return super.onOptionsItemSelected(item);
      }
  }
  
  public void aboutDialog() {
    AlertDialog.Builder alert = new AlertDialog.Builder(this);
    
    alert.setTitle("Give-Me-Ltc  Alpha");
    alert.setMessage("An app that allows GMLTC miners to monitor their account and " +
        "chat with other users.\n\nCreated by: Harry Pritchett" +
        "\nBarcode Scanner: Zxing" +
        "\nApp Base: nninchuu & Simran" + 
        "\n\nwww.give-me-ltc.com");
    
    alert.show();  
  }
  
  public void apiKeyDialog() {
    AlertDialog.Builder alert = new AlertDialog.Builder(this);
    
    alert.setTitle("API Key Required");
    alert.setMessage("Please enter your give-me-ltc API Key:");
    
    final EditText input = new EditText(this);
    alert.setView(input);
    
    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int whichButton) {
          st_apiKey = input.getText().toString().replaceAll(" ", "");
          
          if (!st_apiKey.equals("")) {
            PrefManager.setApiKey(getApplicationContext(), st_apiKey);
            refreshView();
          }
      }
    });
    
    alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
      @Override
        public void onClick(DialogInterface dialog, int whichButton) {
          // Cancelled.
        }
    });
    
    alert.show();
  }
  
  // Get JSON data
  public class GetMinerData extends AsyncTask<String, Void, JSONObject> {

    @Override
    protected JSONObject doInBackground(String... url) {
      
      String JSONString = "";
      JSONObject result = new JSONObject();
      InputStream is = null;
      
      try {
        String mURL = URL_STRING + st_apiKey;
        Log.v("GMLTC", "Url is: " + mURL);

        HttpGet get = new HttpGet(mURL);
        client = new DefaultHttpClient();
        HttpResponse httpResponse = client.execute(get);
        HttpEntity httpEntity = httpResponse.getEntity();
        is = httpEntity.getContent();
      
      } catch (ClientProtocolException e) {
        setError("Error: No internet connection!!");
        e.printStackTrace();
      } catch (IOException e) {
        setError("Error: No internet connection!!");
        e.printStackTrace();
      } catch (Exception e) {
        e.printStackTrace();
      }

      try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
          sb.append(line + "\n");
        }
        is.close();
        JSONString = sb.toString();
        Log.v("GMLTC", "JSONString is:\n" + JSONString);
        
        if (!JSONString.equals("Invalid Key.\n")){
          result = new JSONObject(JSONString);
        }
      } catch (Exception e) {
        setError("Error: Invalid API Key!");
        e.printStackTrace();
      }

      Log.v("GMLTC", "Result:\n" + result);
      return result;
    }
    
    @Override
    protected void onPostExecute(JSONObject result) {
      super.onPostExecute(result);
      
      try {
        mUsername.setText(result.get("username").toString());
        String payoutHistory = new DecimalFormat("#.##").format(result.getDouble("payout_history"));
        mPayoutHistory.setText(payoutHistory + " LTC");
        String rewards = new DecimalFormat("#.####").format(result.getDouble("confirmed_rewards"));
        mConfirmedRewards.setText(rewards + " LTC");
        String roundEstimate = new DecimalFormat("#.####").format(result.getDouble("round_estimate"));
        mRoundShares.setText(result.get("round_shares").toString());
        mRoundEstimate.setText(roundEstimate + " LTC");
        
        int totalHashrate = result.getInt("total_hashrate");
        if (totalHashrate == 0) {
          mTotalHashrate.setTextColor(Color.RED);
        } else {
          mTotalHashrate.setTextColor(Color.WHITE);
        }
        
        mTotalHashrate.setText(totalHashrate + " kH/s");
        
      } catch (JSONException e) {
        setError("Error: Invalid API Key");
        e.printStackTrace();
      }
    }
    
    private void setError(String error) {
      Toast toast = Toast.makeText(getApplicationContext(), error, Toast.LENGTH_LONG);
      toast.setGravity(Gravity.CENTER, 0, 0);
      toast.show();
    }
    
  }
  
  public void refreshView() {
    
    st_apiKey = PrefManager.getApiKey(getApplicationContext());
    Log.v("GMLTC", "apiKey: " + st_apiKey);
    
    if (st_apiKey.equals("")) {
      Toast.makeText(getApplicationContext(), "No API Key is saved.", Toast.LENGTH_LONG).show();
      apiKeyDialog();
      return;
    }
    
    GetMinerData  data = new GetMinerData();
    data.execute();
    
  }
}
Java Source Code List
