I am new to android, i am trying a broadcast demo, I gave my best effort by reading the documentation but its not working. Please have a look at my code:
BroadcastDemoActivity.java
package com.broadcastdemo;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class BroadcastDemoActivity extends Activity {
/** Called when the activity is first created. */
public static final String PUBLIC_HOLIDAYS = "com.paad.action.PUBLIC_HOLIDAYS";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent intent = new Intent(PUBLIC_HOLIDAYS);
intent.putExtra("Holiday", "8th April is a holiday");
sendBroadcast(getIntent());
}
}
Receive.java
package com.broadcastdemo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class Receive extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String message = intent.getStringExtra("Holiday");
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
}
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.broadcastdemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".BroadcastDemoActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".Receive">
<intent-filter>
<action android:name="com.paad.action.PUBLIC_HOLIDAYS"/>
</intent-filter>
</receiver>
</application>
</manifest>
I know that i am missing something which i am not aware of, please help.
I believe your problem is in the call to sendBroadcast.
Intent intent = new Intent(PUBLIC_HOLIDAYS);
intent.putExtra("Holiday", "8th April is a holiday");
sendBroadcast(getIntent());
You are not sending the intent that you construct, you're sending the intent returned from getIntent(), which will be the intent that the activity was started with.
It should be
Intent intent = new Intent(PUBLIC_HOLIDAYS);
intent.putExtra("Holiday", "8th April is a holiday");
sendBroadcast(intent);
Related
I just want to launch activity via Secret Code .
Although , there are many solutions available for this problem but none of them worked for me. It seems like BroadcastReceiver is not listening .
I am using Mi4i MIUI 7.
Here's my code. Please Help!!
MainActivity.java
package com.example.jatin.myapplication2;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
I have even tried the below commented code , but that didn't work.
MySecretCodeReceiver.java
package com.example.jatin.myapplication2;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
/**
* Created by Jatin on 05-Aug-16.
*/
public class MySecretCodeReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals("android.provider.Telephony.SECRET_CODE")) {
String uri = intent.getDataString();
String sep[] = uri.split("://");
if (sep[1].equalsIgnoreCase("1234"))
{
Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage("com.example.jatin.myapplication2.MainActivity");
context.startActivity(launchIntent);
}
else if (sep[1].equalsIgnoreCase("5678")) {
Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage("net.one97.paytm");
context.startActivity(launchIntent);
}
// Intent i = new Intent(context, MainActivity.class);
// i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// setResultData(null);
// context.startActivity(i);
}
}
}
I have also tried putting android:host="1234" in manifest ,still not getting desired results
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"></uses-permission>
<receiver android:name="receivers.MySecretCodeReceiver"
android:enabled="true"
android:exported="true"
android:permission="android.permission.PROCESS_OUTGOING_CALLS">
<intent-filter>
<action android:name="android.provider.Telephony.SECRET_CODE" />
<data android:scheme="android_secret_code" />
</intent-filter>
</receiver>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Got it ....
We have to register our MySecretCodeReceiver as a <receiver> within the <application> element in the AndroidManifest.xml file.
And , Its Done. :)
I know that when I define a Broadcast receiver from manifest in bellow of intent filter I can define category that it's optional.
<receiver android:name=".PushMessageReceiver" >
<intent-filter>
<!-- Receives the actual messages. -->
<category android:name="com.test.myAppname" />
<action android:name="com.test.client.MSGRECEIVE" />
</intent-filter>
</receiver>
I googled but cant get it what is the exact point of adding category or how I can use it. I appreciate to give me some examples.
MainActivity.java
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
/**
* send
*
*/
public class MainActivity extends Activity {
private static final String MY_ACTION = "com.chaowen.action.MY_ACTION";
private Button btn;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btn = (Button)findViewById(R.id.Button01);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent= new Intent();
intent.setAction(MY_ACTION);
//Intent message
intent.putExtra("msg", "ha ha");
//send
sendBroadcast(intent);
}
});
}
}
MyReceiver.java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
/**
* receive
*
*/
public class MyReceive extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
//get Intent message
String msg = intent.getStringExtra("msg");
Toast.makeText(context, msg, Toast.LENGTH_LONG).show();
}
}
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:text="send..."
android:id="#+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.chaowen"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="4" />
<application android:icon="#drawable/icon" 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>
<receiver
android:name="MyReceive"
>
<intent-filter>
<action
android:name="com.chaowen.action.MY_ACTION" />
</intent-filter>
</receiver>
</application>
I've tried:
This which doesn't work on my phone:
Trying to start a service on boot on Android
This which also fails to work properly:
http://www.compiletimeerror.com/2014/12/android-autostart-app-after-boot-with.html#.VpL6sxWLTIU
And a few others which I couldn't find again. Could someone please post a working example of code which will start a MainActivity with the default HelloWorld xml layout?
Code:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<receiver android:name=".MyBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<activity
android:name=".MyService"
android:label="#string/title_activity_my_service" >
</activity>
</application>
</manifest>
package com.example;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class MyBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Intent startServiceIntent = new Intent(context, MyService.class);
context.startService(startServiceIntent);
}
}
package com.example;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MyService extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_service);
}
}
First：create a BroadcastReceiver, onReceive(Context context, Intent intent)，start the app you want to startup in this method
public class BootBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
xxx.class is the app you want to start
Intent service = new Intent(context,XXXclass);
context.startService(service);
Log.v("TAG", "you want to startup this app.....");
Intent intent = getPackageManager().getLaunchIntentForPackage(packageName);
context.startActivity(intent );
} }
Secondly:configure receiver and intent-filter
<receiver android:name="BootBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"></action>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</receiver>
THirdly,add permission
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
I want my application to launch browser when boot my tablet but its crashing on boot time. If someone please let me know my mistake? I write nothing in my activity_main.xmle. Its showing me message "unfortunately the application crashed".
mainfest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.autostartmyapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<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>
<receiver android:name=".BootReciever" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
</manifest>
mainActivitc class
package com.example.autostartmyapp;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://google.com/"));
startActivity(browserIntent);
}
public class BootReciever extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Intent myIntent = new Intent(context, MainActivity.class);
myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(myIntent);
}
}
}
separate both classes and fix mainfest like below
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.autostartmyapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<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>
<receiver
android:name="com.example.autostartmyapp.BootReciever"
android:enabled="true" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
</application>
</manifest>
write MainActiity
MainActivity {
...}
BootReceiver class
package com.example.BootReciever;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class BootReciever extends BroadcastReceiver {
#Override
public void onReceive(Context ctx, Intent arg1) {
Intent iMainActivity = new Intent(ctx, yourMainActivityClass);
iMainStartActivity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
ctx.startActivity(iMainActivity);
}
}
At a guess, I'd say it's probably because your manifest specifies .BootReceiver as the receiver, but based on your code the BootReceiver class is nested inside MainActivity. So you either need to move BootReceiver to a top-level class, or change your manifest to specify .MainActivity.BootReceiver as the receiver.
If that doesn't resolve it, please post your logcat so we can see what error is causing the crash.
Use this in the Manifest as receiver section:
<receiver
android:name=".BootReciever"
android:enabled="true"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
And take care of Broadcast Receiver class that should be not inner:
package com.example.BootReciever;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class BootReciever extends BroadcastReceiver {
#Override
public void onReceive(Context ctx, Intent arg1) {
Intent iMainActivity = new Intent(ctx, MainActivity.class);
iMainStartActivity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
ctx.startActivity(iMainActivity);
}
}
Your app starts so quick and doesn't let other important apps to start first I think you should add some delay in your app to start up. like this:
public class BootUpReceiver extends BroadcastReceiver {
#Override
public void onReceive(final Context context, Intent intent) {
// We can't wait on the main thread as it would be blocked if we wait for too long
new Thread(new Runnable() {
#Override
public void run() {
try {
// Lets wait some time before starting the service to be fair to other processes on startup
Thread.sleep(5000);
} catch (InterruptedException e) {
}
Intent myIntent = new Intent(context, MainActivity.class);
myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(myIntent);
}
}).start();
}
Main Activity Code. BroadcastExample.java
package com.example.broadcast;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class BroadcastExaple extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("PHONE", "Main Activity...Called");
setContentView(R.layout.main);
Log.d("PHONE", "After Mainf Activity...");
}
}
MyBroadCastReceiver.java
package com.example.broadcast;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
public class MyBroadcastReceiver extends BroadcastReceiver {
#Override
/*public void onReceive(Context context, Intent intent) {
try{
Log.d("Call BroadCAST","Calling Broad CAST");
MyPhoneStateListener phoneListener = new MyPhoneStateListener();
TelephonyManager telephony = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
telephony.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE);
}
catch(Exception e)
{
}
}*/
public void onReceive(Context context, Intent intent) {
Log.d("Message", "Message Received");
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.broadcast" android:versionCode="1"
android:versionName="1.0">
<uses-prmission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.CALL_PHONE"/>
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".BroadcastExaple" android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".MyBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
</receiver>
</application>
<uses-sdk android:minSdkVersion="7" />
</manifest>
Program doesn't enter into the onReceive Mathod of MyBroadCastReceiver class.
First, i suggest you to format your code here. So that people here will be glad to read your problem code.
Your code list above does NOT register any BroadcastReceiver to the system. You'd better to check out ApiDemo for more details.