ServiceConsumerActivity.java Source code

Introduction

Here is the source code for ServiceConsumerActivity.java

Source

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class ServiceConsumerActivity extends Activity {

    Messenger messengerToService = null;

    MyIncomingHandler myIncomingHandler = new MyIncomingHandler();
    Messenger messengerFromService = new Messenger(myIncomingHandler);

    ServiceConnection connection = new MyServiceConnection();
    SharedPreferences prefs;
    boolean isBound = false;

    EditText editText;

    void bind() {
        Intent intent = new Intent();
        intent.setClassName("com.allyourcode.p03_03_13", "com.allyourcode.p03_03_13.MyWeatherService");
        isBound = bindService(intent, connection, Context.BIND_AUTO_CREATE);
    }

    public void queryService() {
        if (isBound) {
            Bundle bundle = new Bundle();
            bundle.putString("location", editText.getText().toString().trim());

            Message message = Message.obtain();
            message.replyTo = messengerFromService;
            message.setData(bundle);
            try {
                messengerToService.send(message);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        } else {
            textView.setText(R.string.report_appears_here);
            doToast(R.string.service_not_bound);
        }
    }

    class MyIncomingHandler extends Handler {
        @Override
        public void handleMessage(Message msg) {
            Bundle bundle = msg.getData();
            textView.setText(bundle.getString("weather"));
        }
    }

    void unbind() {
        if (isBound) {
            unbindService(connection);
            isBound = false;
        }
    }

    class MyServiceConnection implements ServiceConnection {
        public void onServiceConnected(ComponentName className, IBinder binder) {
            messengerToService = new Messenger(binder);
            doToast(R.string.service_connected);
        }

        public void onServiceDisconnected(ComponentName n) {
            messengerToService = null;
            doToast(R.string.service_crashed);
        }
    }

    void doToast(int resource) {
        Toast.makeText(this, resource, Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        prefs = getSharedPreferences("PREFS", MODE_PRIVATE);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putBoolean("isBound", isBound);
        editor.putString("report", textView.getText().toString());
        editor.commit();

        unbind();
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_service_consumer);
        editText = (EditText) findViewById(R.id.editText);
        prefs = getSharedPreferences("PREFS", MODE_PRIVATE);
        if (prefs != null) {
            textView = (TextView) findViewById(R.id.textView);

            textView.setText(prefs.getString("report", getString(R.string.report_appears_here)));
            if (prefs.getBoolean("isBound", false)) {
                bind();
            }
        }

        bindButton = (Button) findViewById(R.id.buttonBind);
        locationText = (EditText) findViewById(R.id.editText);
        queryButton = (Button) findViewById(R.id.buttonQuery);
        unbindButton = (Button) findViewById(R.id.buttonUnbind);
    }

    public static TextView textView;
    Button bindButton, queryButton, unbindButton;
    EditText locationText;

    public void onButtonClick(View view) {
        if (view == bindButton) {
            bind();
        } else if (view == queryButton) {
            queryService();
        } else if (view == unbindButton) {
            unbind();
        }
    }
}