工具App for C2DM.

Google PUSH Service: Clould to Device（C2DM）来实现PUSH消息。 必须申请reg——id然后可以使用PUSH. 用来测试，服务器是否deploy完善。接受 “text", "title", "url" 作为消息体，这些是最常用的3个内容。

Client 必须知道一个senderID。 一般由服务器端的负责人来申请。http://code.google.com/android/c2dm/signup.html 可以做到。

在values/c2dm.xml中定义好senderID。 App在运行时提取。一般reg－id，从主界面获取。 

User也可以在option menu(options.xml)中输入一个reg——id。界面是一个。

PreferenceActivity

c2dm.xml:

<?xml version="1.0" encoding="utf-8"?>
       <resources><string name="c2dm_sender_id">xxxxxx@gmail.com</string>
 </resources>

strings.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="hello">Hello World, C2DM_dummyActivity!</string>
    <string name="app_name">C2DM Tester</string>
    <string name="txt_settings_cat_title_push">Push (C2DM)</string>
    <string name="txt_settings_registrationId">Registration ID</string>
    <string name="menu_caption_preferences">Preferences</string>
    <string name="menu_caption_preferences_condensed">Pref</string>
    <string name="menu_caption_exit">Exit</string>
    <string name="pref_registration_id_key">registrationId</string>

</resources>

options.xml(menu)

    <menu xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:id="@+id/menuItemPreferences" android:title="@string/menu_caption_preferences" android:titleCondensed="@string/menu_caption_preferences_condensed" android:enabled="true" android:visible="true" android:icon="@android:drawable/ic_menu_preferences"></item>
        <item android:id="@+id/menuItemExit" android:title="@string/menu_caption_exit" android:titleCondensed="@string/menu_caption_exit" android:enabled="true" android:visible="true" android:icon="@android:drawable/ic_menu_close_clear_cancel"></item>
    </menu>

settings.xml 作为人工输入reg－id：

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
	<PreferenceCategory android:title="@string/txt_settings_cat_title_push">
		<EditTextPreference
			android:key="@string/pref_registration_id_key"
			android:title="@string/txt_settings_registrationId"/>
	</PreferenceCategory>
</PreferenceScreen>

入口Activty:

package com.google.code.c2dmtester;

import android.app.Activity;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import android.widget.ToggleButton;

public class MainActivity extends Activity
{
    public final static String REGISTRATION_ID = "regid";
    public final static String URL             = "url";

    /** Called when the activity is first created. */
    @Override
    public void onCreate( Bundle savedInstanceState )
    {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.main );

        String registrationId = this.readRegistrationId();
        this.setRegistrationId( registrationId );

        EditText et = (EditText) findViewById( R.id.editTextPackageName );
        et.setText( this.getClass().getPackage().getName() );
    }

    private String readRegistrationId()
    {
        SharedPreferences sharedPreferences = PreferencesActivity.getSharedPreferences( this );
        final String registrationId = sharedPreferences.getString( PreferencesActivity.PREF_REGISTRATION_ID, "" );

        return registrationId;
    }

    @Override
    public boolean onCreateOptionsMenu( Menu menu )
    {
        getMenuInflater().inflate( R.menu.options, menu );
        return super.onCreateOptionsMenu( menu );
    }

    @Override
    public boolean onOptionsItemSelected( MenuItem item )
    {
        switch( item.getItemId() )
        {
            case R.id.menuItemPreferences:
                Intent prefsIntent = new Intent( this, PreferencesActivity.class );
                startActivity( prefsIntent );
                return true;
            case R.id.menuItemExit:
                finish();
                return true;
        }
        return super.onOptionsItemSelected( item );
    }

    @Override
    protected void onResume()
    {
        // TODO Auto-generated method stub
        super.onResume();

        Intent intent = getIntent();
        this.onNewIntent( intent );
    }

    private void setRegistrationId( String registrationId )
    {
        EditText editReg = (EditText) findViewById( R.id.editRegistrationID );
        editReg.setText( (CharSequence) registrationId );

        ToggleButton tb = (ToggleButton) findViewById( R.id.toggleButton1 );
        tb.setChecked( null != registrationId && registrationId.length() > 0 );
    }

    @Override
    protected void onNewIntent( Intent intent )
    {
        // TODO Auto-generated method stub
        super.onNewIntent( intent );

        // clear notification (if set)
        final NotificationManager nm = (NotificationManager) getSystemService( Context.NOTIFICATION_SERVICE );
        nm.cancel( C2dmReceiver.NOTIFICATION_ID );

        intent = getIntent();

        final Bundle extras = intent.getExtras();
        String url = intent.getDataString();
        if( extras != null )
        {
            String registrationId = extras.getString( REGISTRATION_ID );
            // String url = extras.getString(URL);

            if( null != registrationId )
            {
                this.setRegistrationId( registrationId );

                saveRegistrationId( registrationId );

                Log.i( "regid", registrationId );
            }
        }
        if( null != url )
        {
            Toast.makeText( getBaseContext(), "url: " + url, Toast.LENGTH_LONG ).show();
            Log.i( "url", url );
        }

    }

    private void saveRegistrationId( String registrationId )
    {
        SharedPreferences sharedPreferences = PreferencesActivity.getSharedPreferences( this );
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putString( PreferencesActivity.PREF_REGISTRATION_ID, registrationId );
        boolean success = editor.commit();
        // Toast.makeText(this, success ? "saved" : "error", Toast.LENGTH_SHORT).show();
    }

    public void onClickShare( View view )
    {
        Log.i( "event", "share" );
        EditText editReg = (EditText) findViewById( R.id.editRegistrationID );
        String regid = editReg.getText().toString();

        EditText editPackage = (EditText) findViewById( R.id.editTextPackageName );
        String packageName = editPackage.getText().toString();

        String message = "package name: " + packageName + "\nregistration ID: " + regid;

        Intent sharingIntent = new Intent( Intent.ACTION_SEND );
        sharingIntent.setType( "text/plain" );
        sharingIntent.putExtra( android.content.Intent.EXTRA_TEXT, message );
        startActivity( Intent.createChooser( sharingIntent, "Share Registration ID Using" ) );
    }

    public void onClickToggle( View view )
    {
        Log.i( "event", "click" );
        // Toast.makeText(context, "toogle", 1000);
        ToggleButton tb = (ToggleButton) findViewById( R.id.toggleButton1 );
        boolean b = tb.isChecked();
        Log.i( "status", b ? "checked" : "unchecked" );

        if( b )
        {
            this.register();
        }
        else
        {
            this.unregister();
        }

    }

    private void register()
    {
        Toast.makeText( getBaseContext(),
                "registering...",
                Toast.LENGTH_LONG ).show();

        Intent registrationIntent = new Intent( "com.google.android.c2dm.intent.REGISTER" );
        registrationIntent.putExtra( "app", PendingIntent.getBroadcast( this, 0, new Intent(), 0 ) ); // boilerplate
        registrationIntent.putExtra( "sender", getString( R.string.c2dm_sender_id ) );
        startService( registrationIntent );
    }

    private void unregister()
    {
        Toast.makeText( getBaseContext(),
                "unregistering",
                Toast.LENGTH_SHORT ).show();

        Intent unregIntent = new Intent( "com.google.android.c2dm.intent.UNREGISTER" );
        unregIntent.putExtra( "app", PendingIntent.getBroadcast( this, 0, new Intent(), 0 ) );
        startService( unregIntent );

        setRegistrationId( "" );
        saveRegistrationId( "" );
        // nothing to do in this demo
    }

}

消息处理的BroadcastReceiver:

package com.google.code.c2dmtester;

import android.R;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.util.Log;

public class C2dmReceiver extends BroadcastReceiver
{
    public final static int NOTIFICATION_ID = 123; // any number will do

    @Override
    public void onReceive( Context context, Intent intent )
    {
        if( intent.getAction().equals(
                "com.google.android.c2dm.intent.REGISTRATION" ) )
        {
            String registration = intent.getStringExtra( "registration_id" );
            Log.i( "regid", (null == registration) ? "(null)" : registration );

            if( intent.getStringExtra( "error" ) != null )
            {
                // handle an error for registration
                String title = "error receiving registration ID";
                String message = registration;
                Intent myIntent = new Intent( context, MainActivity.class );
                createNotification( context, title, message, myIntent );
            }
            else if( intent.getStringExtra( "unregistered" ) != null )
            {
                // call service to handle unregistration
                String title = "unregistering event received";
                String message = registration;
                Intent myIntent = new Intent( context, MainActivity.class );
                createNotification( context, title, message, myIntent );
            }
            else if( registration != null )
            {
                // call service to handle registration
                Intent myIntent = new Intent( context, MainActivity.class );
                myIntent.putExtra( MainActivity.REGISTRATION_ID,
                        registration );
                // String title = "registration ID received";
                // String message = registration;
                // createNotification(context, title, message, myIntent);

                // open activity as new task (and close older running instance
                // this needs to be done, if a Broadcast Receiver wants to start
                // an activity
                myIntent.addFlags( Intent.FLAG_ACTIVITY_NEW_TASK );
                myIntent.addFlags( Intent.FLAG_ACTIVITY_CLEAR_TOP );
                context.startActivity( myIntent );
                Log.i( "C2D RegID:", registration );

            }
        }
        else if( intent.getAction().equals(
                "com.google.android.c2dm.intent.RECEIVE" ) )
        {
            // we are just going to say a few fields already exist here, but
            // this is based
            // on what you may be sending from above in your data fields
            String title = intent.getExtras().getString( "title" );
            String message = intent.getExtras().getString( "text" );
            String url = intent.getExtras().getString( "url" );

            Intent myIntent = new Intent( context, MainActivity.class );
            myIntent.putExtra( MainActivity.URL, url );
            myIntent.setData( Uri.parse( url ) );
            createNotification( context, title, message, myIntent );
        }
    }

    private void createNotification( Context context, String title,
            String message, Intent myIntent )
    {
        PendingIntent contentIntent = PendingIntent.getActivity( context, 0,
                myIntent, PendingIntent.FLAG_UPDATE_CURRENT );

        // create the notification!
        int icon = R.drawable.stat_notify_chat;
        long when = System.currentTimeMillis();
        CharSequence contentTitle, contentMessage = null;
        contentTitle = (CharSequence) title;

        contentMessage = (CharSequence) message;

        NotificationManager nm = (NotificationManager) context
                .getSystemService( Context.NOTIFICATION_SERVICE );
        Notification n = new Notification( icon, contentTitle, when );
        n.setLatestEventInfo( context, contentTitle, contentMessage,
                contentIntent );
        nm.notify( C2dmReceiver.NOTIFICATION_ID, n ); // 0 can be replaced with a
                                                      // number for separate style
                                                      // of messages
    }
}

reg_id存储：

package com.google.code.c2dmtester;

import android.content.ContextWrapper;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceActivity;

public class PreferencesActivity extends PreferenceActivity
{
    public final static String PREF_REGISTRATION_ID = "registrationId";

    @Override
    protected void onCreate( Bundle savedInstanceState )
    {
        super.onCreate( savedInstanceState );

        this.addPreferencesFromResource( R.xml.settings );
    }

    public static final SharedPreferences getSharedPreferences( final ContextWrapper ctx )
    {
        return ctx.getSharedPreferences( ctx.getPackageName() + "_preferences", MODE_PRIVATE );
    }
}

manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.google.code.c2dmtester"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15"/>
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <permission      android:name="com.google.code.c2dmtester.permission.C2D_MESSAGE" android:protectionLevel="signature" /> 
    <uses-permission android:name="com.google.code.c2dmtester.permission.C2D_MESSAGE" />
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
    
    <application
        android:debuggable="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".PreferencesActivity" >
        </activity>

        <service android:name=".C2dmReceiver" />

        <receiver
            android:name=".C2dmReceiver"
            android:permission="com.google.android.c2dm.permission.SEND" >
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />

                <category android:name="com.google.code.c2dmtester" />
            </intent-filter>
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />

                <category android:name="com.google.code.c2dmtester" />
            </intent-filter>
        </receiver>
    </application>
 


</manifest>