廣播接收器注冊一共有兩種形式 : 靜態注冊和動態注冊.
兩者及其接收廣播的區別:
1.動態注冊的廣播 永遠要快于 靜態注冊的廣播,不管靜態注冊的優先級設置的多高,不管動態注冊的優先級有多低。
2.動態注冊廣播不是 常駐型廣播 ，也就是說廣播跟隨activity的生命周期。注意: 在activity結束前，移除廣播接收器。
靜態注冊是常駐型 ，也就是說當應用程序關閉后，如果有信息廣播來，程序也會被系統調用自動運行。
3.在同一個優先級下,誰先啟動的快,誰將先接收到廣播。
下面這個Demo，界面如下，注冊兩個動態接收器（接收自定義廣播和系統廣播）和注冊靜態廣播（接收自定義靜態和廣播、手機USB的插拔事件、接收短信并讀取短信息）
工程目錄如下：注意看代碼中的注釋
xml布局文件（activity_main.xml）
<?xml version="1.0" encoding="utf-8"?> <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:id="@+id/send_static" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="發送自定義靜態注冊廣播"/> <Button android:id="@+id/send_dynamic" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="發送自定義動態注冊廣播"/> <Button android:id="@+id/send_system" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="發送系統動態注冊廣播"/> </LinearLayout>
Manifest.xml如下，這里面定義的權限信息和注冊的廣播
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.nii.receiver" > <!--監聽短信息--> <uses-permission android:name="android.permission.RECEIVE_SMS" /> <uses-permission android:name="android.permission.READ_SMS" /> <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" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <!-- 注冊自定義靜態廣播接收器 --> <receiver android:name=".StaticReceiver"> <intent-filter> <action android:name="com.byread.static" /> </intent-filter> </receiver> <!-- 注冊系統靜態廣播接收器 --> <receiver android:name=".SystemReceiver"> <intent-filter> <action android:name="android.intent.action.BATTERY_LOW" /> <action android:name="android.provider.Telephony.SMS_RECEIVED"/> <action android:name="android.hardware.usb.action.USB_STATE"/> </intent-filter> </receiver> </application> </manifest>
MainActivity.Java
package com.nii.receiver; import android.Manifest; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.Toast; import com.nii.receiver.type.RequestPermissionType; import com.nii.receiver.util.PermissionUtil; public class MainActivity extends AppCompatActivity { /** * 發送靜態廣播按鈕 */ private Button sendStaticBtn; /** * 發送動態廣播按鈕 */ private Button sendDynamicBtn; /** * 發送系統廣播按鈕 */ private Button sendSystemBtn; /** * 靜態action */ private static final String STATICACTION = "com.byread.static"; /** * 動態action */ private static final String DYNAMICACTION = "com.byread.dynamic"; /** * USB設備連接 */ private static final String SYSTEMACTION = Intent.ACTION_POWER_CONNECTED; private Context mContext; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); this.mContext = this; sendStaticBtn = (Button) findViewById(R.id.send_static); sendDynamicBtn = (Button) findViewById(R.id.send_dynamic); sendSystemBtn = (Button) findViewById(R.id.send_system); sendStaticBtn.setOnClickListener(new MyOnClickListener()); sendDynamicBtn.setOnClickListener(new MyOnClickListener()); sendSystemBtn.setOnClickListener(new MyOnClickListener()); //申請讀取短信的權限 PermissionUtil.requestPermission(mContext, Manifest.permission.READ_SMS, RequestPermissionType.REQUEST_CODE_ASK_READ_SMS); PermissionUtil.requestPermission(mContext, Manifest.permission.RECEIVE_SMS, RequestPermissionType.REQUEST_CODE_ASK_RECEIVE_SMS); } class MyOnClickListener implements View.OnClickListener { @Override public void onClick(View v) { // 發送自定義靜態注冊廣播消息 if (v.getId() == R.id.send_static) { Log.e("MainActivity", "發送自定義靜態注冊廣播消息"); Intent intent = new Intent(); intent.setAction(STATICACTION); intent.putExtra("msg", "接收靜態注冊廣播成功！"); sendBroadcast(intent); } // 發送自定義動態注冊廣播消息 else if (v.getId() == R.id.send_dynamic) { Log.e("MainActivity", "發送自定義動態注冊廣播消息"); Intent intent = new Intent(); intent.setAction(DYNAMICACTION); intent.putExtra("msg", "接收動態注冊廣播成功！"); sendBroadcast(intent); } // 發送系統動態注冊廣播消息。當手機連接充電設備時會由系統自己發送廣播消息。 else if (v.getId() == R.id.send_system) { Log.e("MainActivity", "發送系統動態注冊廣播消息"); Intent intent = new Intent(); intent.setAction(SYSTEMACTION); intent.putExtra("msg", "正在充電。。。。"); } } } @Override protected void onStart() { super.onStart(); Log.e("MainActivity", "注冊廣播事件"); // 注冊自定義動態廣播消息 IntentFilter filter_dynamic = new IntentFilter(); filter_dynamic.addAction(DYNAMICACTION); registerReceiver(dynamicReceiver, filter_dynamic); // 注冊系統動態廣播消息 IntentFilter filter_system = new IntentFilter(); filter_system.addAction(SYSTEMACTION); registerReceiver(systemReceiver, filter_system); } private BroadcastReceiver dynamicReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.e("MainActivity", "接收自定義動態注冊廣播消息"); if (intent.getAction().equals(DYNAMICACTION)) { String msg = intent.getStringExtra("msg"); Toast.makeText(context, msg, Toast.LENGTH_SHORT).show(); } } }; private BroadcastReceiver systemReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.e("MainActivity", "接收系統動態注冊廣播消息"); if (intent.getAction().equals(SYSTEMACTION)) { String msg = intent.getStringExtra("msg"); Toast.makeText(context, msg, Toast.LENGTH_SHORT).show(); } } }; } StaticReceiver.java
package com.nii.receiver; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Handler; import android.widget.Toast; /** * Created by wzj on 2017/2/19. */ public class StaticReceiver extends BroadcastReceiver { /** * 接收廣播 * @param context context * @param intent intent */ @Override public void onReceive(Context context, Intent intent) { String msg = intent.getStringExtra("msg"); Toast.makeText(context, msg, Toast.LENGTH_SHORT).show(); } } SystemReceiver.java這里面處理一些系統的事件
package com.nii.receiver; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.telephony.SmsMessage; import android.text.format.DateFormat; import android.util.Log; import android.widget.Toast; import com.nii.receiver.util.DialogUtil; import java.util.Date; /** * Created by wzj on 2017/2/19. */ public class SystemReceiver extends BroadcastReceiver { /** * 接收系統靜態廣播 * * @param context context * @param intent intent */ @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(Intent.ACTION_BATTERY_LOW)) { Log.e("SystemReceiver", "電量低提示"); Toast.makeText(context, "您的手機電量偏低，請及時充電", Toast.LENGTH_SHORT).show(); } else if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")) { if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")) { Bundle bundle = intent.getExtras(); if (bundle != null) {//如果數據不為空 //獲得收到的短信數據 Object[] objArray = (Object[]) bundle.get("pdus"); //根據objArray的大小創建一個SmsMessage數組，用于封裝短信內容 SmsMessage[] smsMessage = new SmsMessage[objArray.length]; StringBuffer sb = new StringBuffer(); sb.append("時間：" + new DateFormat().format("yyyy - MM - dd hh.mm.ss", new Date())); //遍歷smsMessage數組取出所有短信 for (int i = 0; i < smsMessage.length; i++) { //將每條字節類型的短信數據轉換成SmsMessage對象 smsMessage[i] = SmsMessage.createFromPdu((byte[]) objArray[i]); //獲取短信發送地址 sb.append("發送者：" + smsMessage[i].getOriginatingAddress()); //獲取短信內容 sb.append("短信內容：" + smsMessage[i].getDisplayMessageBody() + "/n"); } DialogUtil.showPrompt(context,sb.toString()); Toast.makeText(context, sb.toString(), Toast.LENGTH_LONG).show(); } } } else if(intent.getAction().equals("android.hardware.usb.action.USB_STATE")) { if (intent.getExtras().getBoolean("connected")) { Toast.makeText(context, "USB插入", Toast.LENGTH_LONG).show(); } else { Toast.makeText(context, "USB拔出", Toast.LENGTH_LONG).show(); } } } } RequestPermissionType.java是權限請求的時候，Qequest Code（請求碼）
package com.nii.receiver.type; /** * Created by wzj on 2017/2/19. */ public interface RequestPermissionType { /** * 請求打電話的權限碼 */ int REQUEST_CODE_ASK_CALL_PHONE = 100; /** * 請求接收短信息 */ int REQUEST_CODE_ASK_RECEIVE_SMS = 101; /** * 請求讀短信 */ int REQUEST_CODE_ASK_READ_SMS = 102; } DialogUtil.java是界面彈窗工具類
package com.nii.receiver.util; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.view.WindowManager; /** * 對話框工具箱 * * @author xiaopan */ public class DialogUtil { /** * 顯示一個對話框 * * @param context 上下文對象，最好給Activity，否則需要android.permission.SYSTEM_ALERT_WINDOW * @param title 標題 * @param message 消息 * @param confirmButton 確認按鈕 * @param confirmButtonClickListener 確認按鈕點擊監聽器 * @param centerButton 中間按鈕 * @param centerButtonClickListener 中間按鈕點擊監聽器 * @param cancelButton 取消按鈕 * @param cancelButtonClickListener 取消按鈕點擊監聽器 * @param onShowListener 顯示監聽器 * @param cancelable 是否允許通過點擊返回按鈕或者點擊對話框之外的位置關閉對話框 * @param onCancelListener 取消監聽器 * @param onDismissListener 銷毀監聽器 * @return 對話框 */ public static AlertDialog showAlert(Context context, String title, String message, String confirmButton, DialogInterface.OnClickListener confirmButtonClickListener, String centerButton, DialogInterface.OnClickListener centerButtonClickListener, String cancelButton, DialogInterface.OnClickListener cancelButtonClickListener, DialogInterface.OnShowListener onShowListener, boolean cancelable, DialogInterface.OnCancelListener onCancelListener, DialogInterface.OnDismissListener onDismissListener) { AlertDialog.Builder promptBuilder = new AlertDialog.Builder(context); if (title != null) { promptBuilder.setTitle(title); } if (message != null) { promptBuilder.setMessage(message); } if (confirmButton != null) { promptBuilder.setPositiveButton(confirmButton, confirmButtonClickListener); } if (centerButton != null) { promptBuilder.setNeutralButton(centerButton, centerButtonClickListener); } if (cancelButton != null) { promptBuilder.setNegativeButton(cancelButton, cancelButtonClickListener); } promptBuilder.setCancelable(true); if (cancelable) { promptBuilder.setOnCancelListener(onCancelListener); } AlertDialog alertDialog = promptBuilder.create(); if (!(context instanceof Activity)) { alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); } alertDialog.setOnDismissListener(onDismissListener); alertDialog.setOnShowListener(onShowListener); alertDialog.show(); return alertDialog; } /** * 顯示一個對話框 * * @param context 上下文對象，最好給Activity，否則需要android.permission.SYSTEM_ALERT_WINDOW * @param title 標題 * @param message 消息 * @param confirmButtonClickListener 確認按鈕點擊監聽器 * @param cancelButtonClickListener 取消按鈕點擊監聽器 * @return 對話框 */ public static AlertDialog showConfirm(Context context, String title, String message, DialogInterface.OnClickListener confirmButtonClickListener, DialogInterface.OnClickListener cancelButtonClickListener) { return showAlert(context, title, message, "Yes", confirmButtonClickListener, null, null, "No", cancelButtonClickListener, null, true, null, null); } /** * 顯示一個提示框 * * @param context 上下文對象，最好給Activity，否則需要android.permission.SYSTEM_ALERT_WINDOW * @param message 提示的消息 * @param confirmButton 確定按鈕的名字 */ public static AlertDialog showPrompt(Context context, String message, String confirmButton) { return showAlert(context, null, message, confirmButton, null, null, null, null, null, null, true, null, null); } /** * 顯示一個提示框 * * @param context 上下文對象，最好給Activity，否則需要android.permission.SYSTEM_ALERT_WINDOW * @param message 提示的消息 */ public static AlertDialog showPrompt(Context context, String message) { return showAlert(context, null, message, "OK", null, null, null, null, null, null, true, null, null); } } PermissionUtil.java是權限申請工具類
package com.nii.receiver.util; import android.Manifest; import android.app.Activity; import android.content.Context; import android.content.pm.PackageManager; import android.os.Build; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; /** * Created by wzj on 2017/2/19. */ public abstract class PermissionUtil { /** * 請求權限 * @param mContext mContext * @param permission permission * @param requestCode requestCode */ public static void requestPermission(Context mContext,String permission,int requestCode) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) { return; } int checkCallPhonePermission = ContextCompat.checkSelfPermission(mContext,permission); if (checkCallPhonePermission != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions((Activity) mContext, new String[]{permission},requestCode); } } } 以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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