note 20- BroadcastReceiver and Intent

1. if I want my application activity to catch broadcast. I must register the receiver and

set an intent filter which indicates the intent actions to be interested .

2. if I want my application activity to send a broadcast . No need to indicate the receiver.

It will run on the system level once some other apps registered the interested intent action

in their manifest .

Super crazy decouple system !

just set the action in the intent intent.setAction(Intent.ACTION_XXX);

and send the Broadcast with this intent Context.sendBroadcast(intent);

3. the receiver must extends BroadcastReceiver, and override the onReceive(Context context , Intent intent);

manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.broadcast_test"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:label="@string/app_name" >
        
        <activity android:name="BroadcastTest"
                  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="TestReceiver">
            <intent-filter>
                <action android:name="android.intent.action.EDIT"/>
            </intent-filter>
        </receiver>
            
        
    </application>
    
    <uses-sdk android:minSdkVersion="4"/>
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>
    
    
</manifest>

package com.broadcast_test;

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;
import android.widget.LinearLayout;

public class BroadcastTest extends Activity
{
    
    LinearLayout.LayoutParams params;
    LinearLayout layout;
    Button sendButt;
    
    
    private OnClickListener sendListener=new OnClickListener(){

        public void onClick(View arg0) {
//            throw new UnsupportedOperationException("Not supported yet.");
            Intent intent=new Intent();
            intent.setAction(Intent.ACTION_EDIT);
            
            Bundle b=new Bundle();
            
            BroadcastTest.this.sendBroadcast(intent);
        }
        
    };
    
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        params=new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.FILL_PARENT,
                LinearLayout.LayoutParams.WRAP_CONTENT);
        
        layout=new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        
        sendButt=new Button(this);
        sendButt.setText("Send");
        sendButt.setOnClickListener(sendListener);
        
        layout.addView(sendButt,params);
        
        this.setContentView(layout);

        
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.broadcast_test;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

/**
 *
 * @author Administrator
 */
public  class TestReceiver extends BroadcastReceiver{
    
    
    public TestReceiver(){
        Log.i("log_filter","receiver start");
    }

    @Override
    public void onReceive(Context arg0, Intent arg1) {
//        throw new UnsupportedOperationException("Not supported yet.");
        Log.i("log_filter","received broadcast");
    }
    
    
    
}

Intent action list:

http://developer.android.com/reference/android/content/Intent.html

Usual Actions :

http://blog.csdn.net/iamkila/article/details/8096635

1 Intent.ACTION_MAIN

String: android.intent.action.MAIN

标识Activity为一个程序的开始。比较常用。

Input:nothing

Output:nothing

<activity android:name=".Main" android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

2 Intent.Action_CALL

Stirng: android.intent.action.CALL

呼叫指定的电话号码。

Input:电话号码。数据格式为：tel:+phone number

Output:Nothing

Intent intent=new Intent();

intent.setAction(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:1320010001");
startActivity(intent);

3 Intent.Action.DIAL

String: action.intent.action.DIAL

调用拨号面板

Intent intent=new Intent();
intent.setAction(Intent.ACTION_DIAL); //android.intent.action.DIAL
intent.setData(Uri.parse("tel:1320010001");
startActivity(intent);

Input:电话号码。数据格式为：tel:+phone number

Output:Nothing

说明：打开Android的拨号UI。如果没有设置数据，则打开一个空的UI，如果设置数据，action.DIAL则通过调用getData()获取电话号码。

但设置电话号码的数据格式为 tel:+phone number.

4 Intent.Action.ALL_APPS

String: andriod.intent.action.ALL_APPS

列出所有的应用。

Input：Nothing.

Output:Nothing.

5 Intent.ACTION_ANSWER

Stirng:android.intent.action.ANSWER

处理呼入的电话。

Input:Nothing.

Output:Nothing.

6 Intent.ACTION_ATTACH_DATA

String: android.action.ATTCH_DATA

别用于指定一些数据应该附属于一些其他的地方，例如，图片数据应该附属于联系人

Input: Data

Output:nothing

7 Intent.ACTION_BUG_REPORT

String: android.intent.action.BUG_REPORT

显示Dug报告。

Input:nothing

output:nothing

8 Intent.Action_CALL_BUTTON

String: android.action.intent.CALL_BUTTON.

相当于用户按下“拨号”键。经测试显示的是“通话记录”

Input:nothing

Output:nothing

Intent intent = new Intent(Intent.ACTION_CALL_BUTTON);
startActivity(intent);

9 Intent.ACTION_CHOOSER

String: android.intent.action.CHOOSER

显示一个activity选择器，允许用户在进程之前选择他们想要的,与之对应的是Intent.ACTION_GET_CONTENT.

10. Intent.ACTION_GET_CONTENT

String: android.intent.action.GET_CONTENT

允许用户选择特殊种类的数据，并返回（特殊种类的数据：照一张相片或录一段音）

Input: Type

Output:URI

int requestCode = 1001;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"
intent.setType("image/*"); // 查看类型，如果是其他类型，比如视频则替换成 video/*，或 */*
Intent wrapperIntent = Intent.createChooser(intent, null);

startActivityForResult(wrapperIntent, requestCode);

11 Intent.ACTION_VIEW

String android.intent.action.VIEW

用于显示用户的数据。

比较通用，会根据用户的数据类型打开相应的Activity。

比如 tel:13400010001打开拨号程序，http://www.g.cn则会打开浏览器等。

Uri uri = Uri.parse("http://www.google.com"); //浏览器
Uri uri =Uri.parse("tel:1232333"); //拨号程序
Uri uri=Uri.parse("geo:39.899533,116.036476"); //打开地图定位
Intent it = new Intent(Intent.ACTION_VIEW,uri);
startActivity(it);

//播放视频
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.parse("file:///sdcard/media.mp4");
intent.setDataAndType(uri, "video/*");
startActivity(intent);

//调用发送短信的程序
Intent it = new Intent(Intent.ACTION_VIEW);
it.putExtra("sms_body", "信息内容...");
it.setType("vnd.android-dir/mms-sms");
startActivity(it);

12 Intent.ACTION_SENDTO
String: android.intent.action.SENDTO
说明：发送短信息

//发送短信息
Uri uri = Uri.parse("smsto:13200100001");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
it.putExtra("sms_body", "信息内容...");
startActivity(it);

//发送彩信,设备会提示选择合适的程序发送
Uri uri = Uri.parse("content://media/external/images/media/23");
//设备中的资源（图像或其他资源）
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra("sms_body", "内容");
intent.putExtra(Intent.EXTRA_STREAM, uri);
intent.setType("image/png");
startActivity(it);

//Email
Intent intent=new Intent(Intent.ACTION_SEND);
String[] tos={"[email protected]"};
String[] ccs={"[email protected]"};
intent.putExtra(Intent.EXTRA_EMAIL, tos);
intent.putExtra(Intent.EXTRA_CC, ccs);
intent.putExtra(Intent.EXTRA_TEXT, "The email body text");
intent.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
intent.setType("message/rfc822");
startActivity(Intent.createChooser(intent, "Choose Email Client"));

13 Intent.ACTION_GET_CONTENT

//选择图片 requestCode 返回的标识
Intent intent = new Intent(Intent.ACTION_GET_CONTENT); //"android.intent.action.GET_CONTENT"
intent.setType(contentType); //查看类型 String IMAGE_UNSPECIFIED = "image/*";
Intent wrapperIntent = Intent.createChooser(intent, null);
((Activity) context).startActivityForResult(wrapperIntent, requestCode);

//添加音频
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(contentType); //String VIDEO_UNSPECIFIED = "video/*";
Intent wrapperIntent = Intent.createChooser(intent, null);
((Activity) context).startActivityForResult(wrapperIntent, requestCode);

//拍摄视频
int durationLimit = getVideoCaptureDurationLimit(); //SystemProperties.getInt("ro.media.enc.lprof.duration", 60);
Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
intent.putExtra(MediaStore.EXTRA_SIZE_LIMIT, sizeLimit);
intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, durationLimit);
startActivityForResult(intent, REQUEST_CODE_TAKE_VIDEO);

//视频
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(contentType); //String VIDEO_UNSPECIFIED = "video/*";
Intent wrapperIntent = Intent.createChooser(intent, null);
((Activity) context).startActivityForResult(wrapperIntent, requestCode);

//录音
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(ContentType.AUDIO_AMR); //String AUDIO_AMR = "audio/amr";
intent.setClassName("com.android.soundrecorder",
"com.android.soundrecorder.SoundRecorder");
((Activity) context).startActivityForResult(intent, requestCode);

//拍照 REQUEST_CODE_TAKE_PICTURE 为返回的标识
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //"android.media.action.IMAGE_CAPTURE";
intent.putExtra(MediaStore.EXTRA_OUTPUT, Mms.ScrapSpace.CONTENT_URI); // output,Uri.parse("content://mms/scrapSpace");
startActivityForResult(intent, REQUEST_CODE_TAKE_PICTURE);

1. instance an IntentFilter: IntentFilter filter=new IntentFilter();

2. register the action in intent filter : filter.addAction("android.provider.Telephony.SMS_RECEIVED");

3. instance my Receiver ,which extends BroadcastReceiver :

smsreceiver=new SMSReceiver();

4. register the receiver in the context:

Context.registerReceiver(smsreceiver,filter);

5. unregister: Context.unregisterReceiver(smsreceiver);

6. remember to add the neccessery permision in manifest file

package com.broadcast_test_02;

import android.app.Activity;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;

public class BroadcastTest02 extends Activity
{
    
    private static final String SMS_ACTION="android.provider.Telephony.SMS_RECEIVED";
    
    
    private LinearLayout layout;
    private Button registerButt;
    private Button unregisterButt;
    
    private LinearLayout.LayoutParams params;
    
    private SMSReceiver smsreceiver;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        
        params=new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.FILL_PARENT,
                LinearLayout.LayoutParams.WRAP_CONTENT);
        
        layout=new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        
        registerButt=new Button(this);
        registerButt.setText("register broadcast receiver");
        registerButt.setOnClickListener(registerListener);
        layout.addView(registerButt,params);
        
        unregisterButt=new Button(this);
        unregisterButt.setText("unregister broadcast receiver");
        unregisterButt.setOnClickListener(unregisterListener);
        layout.addView(unregisterButt,params);
        
        this.setContentView(layout);
        
    }
    
    
    private OnClickListener registerListener=new OnClickListener(){

        public void onClick(View arg0) {
//            throw new UnsupportedOperationException("Not supported yet.");
            smsreceiver=new SMSReceiver();
            
            IntentFilter filter=new IntentFilter();
            filter.addAction(SMS_ACTION);
            BroadcastTest02.this.registerReceiver(smsreceiver, filter);
            
        }
        
    };
    
    private OnClickListener unregisterListener=new OnClickListener(){

        public void onClick(View arg0) {
//            throw new UnsupportedOperationException("Not supported yet.");
            BroadcastTest02.this.unregisterReceiver(smsreceiver);
            Log.i("log_filter", "unregister receiver");
        }
        
    };

}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.broadcast_test_02;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.util.Log;

/**
 *
 * @author Administrator
 */
public class SMSReceiver extends BroadcastReceiver{
    
    public SMSReceiver(){
        Log.i("log_filter","create sms receiver");
    }

    @Override
    public void onReceive(Context arg0, Intent intent) {
//        throw new UnsupportedOperationException("Not supported yet.");
        Log.i("log_filter","received sms:"+intent.getExtras().get("pdus"));
        
        Bundle bundle=intent.getExtras();
        Object[] myObjPdus=(Object[])bundle.get("pdus");
        
        SmsMessage[] messages=new SmsMessage[myObjPdus.length];
        
        for(int i=0;i<myObjPdus.length;i++){
            messages[i]=SmsMessage.createFromPdu((byte[])myObjPdus[i]);
            Log.i("log_filter", "sms:"+messages[i].getDisplayMessageBody());
        }
        
        
    }
    
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.broadcast_test_02"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:label="@string/app_name" >
        <activity android:name="BroadcastTest02"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        
    </application>
    
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>
</manifest>

note 20- BroadcastReceiver and Intent

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