But how can main Activity know the status of IntentService before end of job? It's another exercise to send additional Broadcast with another IntentFilter while running, to update main Activity, from IntentService. Such that we can implement additional BroadcastReceiver in main Activity to receive the additional Broadcast , and then update a ProgressBar.
MyIntentService.java
package com.example.androidintentservice;
import android.app.IntentService;
import android.content.Intent;
public class MyIntentService extends IntentService {
public static final String ACTION_MyIntentService = "com.example.androidintentservice.RESPONSE";
public static final String ACTION_MyUpdate = "com.example.androidintentservice.UPDATE";
public static final String EXTRA_KEY_IN = "EXTRA_IN";
public static final String EXTRA_KEY_OUT = "EXTRA_OUT";
public static final String EXTRA_KEY_UPDATE = "EXTRA_UPDATE";
String msgFromActivity;
String extraOut;
public MyIntentService() {
super("com.example.androidintentservice.MyIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
//get input
msgFromActivity = intent.getStringExtra(EXTRA_KEY_IN);
extraOut = "Hello: " + msgFromActivity;
for(int i = 0; i <=10; i++){
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//send update
Intent intentUpdate = new Intent();
intentUpdate.setAction(ACTION_MyUpdate);
intentUpdate.addCategory(Intent.CATEGORY_DEFAULT);
intentUpdate.putExtra(EXTRA_KEY_UPDATE, i);
sendBroadcast(intentUpdate);
}
//return result
Intent intentResponse = new Intent();
intentResponse.setAction(ACTION_MyIntentService);
intentResponse.addCategory(Intent.CATEGORY_DEFAULT);
intentResponse.putExtra(EXTRA_KEY_OUT, extraOut);
sendBroadcast(intentResponse);
}
}
MainActivity.java
package com.example.androidintentservice;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.widget.ProgressBar;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView textResult;
ProgressBar progressBar;
private MyBroadcastReceiver myBroadcastReceiver;
private MyBroadcastReceiver_Update myBroadcastReceiver_Update;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textResult = (TextView)findViewById(R.id.result);
progressBar = (ProgressBar)findViewById(R.id.progressbar);
//prepare MyParcelable passing to intentMyIntentService
String msgToIntentService = "Android-er";
//Start MyIntentService
Intent intentMyIntentService = new Intent(this, MyIntentService.class);
intentMyIntentService.putExtra(MyIntentService.EXTRA_KEY_IN, msgToIntentService);
startService(intentMyIntentService);
myBroadcastReceiver = new MyBroadcastReceiver();
myBroadcastReceiver_Update = new MyBroadcastReceiver_Update();
//register BroadcastReceiver
IntentFilter intentFilter = new IntentFilter(MyIntentService.ACTION_MyIntentService);
intentFilter.addCategory(Intent.CATEGORY_DEFAULT);
registerReceiver(myBroadcastReceiver, intentFilter);
IntentFilter intentFilter_update = new IntentFilter(MyIntentService.ACTION_MyUpdate);
intentFilter_update.addCategory(Intent.CATEGORY_DEFAULT);
registerReceiver(myBroadcastReceiver_Update, intentFilter_update);
}
@Override
protected void onDestroy() {
super.onDestroy();
//un-register BroadcastReceiver
unregisterReceiver(myBroadcastReceiver);
unregisterReceiver(myBroadcastReceiver_Update);
}
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String result = intent.getStringExtra(MyIntentService.EXTRA_KEY_OUT);
textResult.setText(result);
}
}
public class MyBroadcastReceiver_Update extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
int update = intent.getIntExtra(MyIntentService.EXTRA_KEY_UPDATE, 0);
progressBar.setProgress(update);
}
}
}
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<TextView
android:id="@+id/result"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ProgressBar
android:id="@+id/progressbar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
style="?android:attr/progressBarStyleHorizontal"
android:max="10"
android:progress="0"/>
</LinearLayout>
Need to include <service> of "MyIntentService" in AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidintentservice"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.androidintentservice.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>
<service android:name="com.example.androidintentservice.MyIntentService"></service>
</application>
</manifest>
Download the files.Related:
- Generate Notification in IntentService
