BaseActivity
/**所有Activity的基类*/
public class BaseActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActivityCollector.addActivity(this);
}
@Override
protected void onDestroy() {
super.onDestroy();
ActivityCollector.removeActivity(this);
}
}
MainActivity
public class MainActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i("MainActivity", "++++++onCreate");
TextView textView = new TextView(this);
textView.setGravity(Gravity.CENTER);
textView.setText("请登录");
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, SecondActivity.class));
}
});
setContentView(textView);
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("MainActivity", "++++++onDestroy");
}
@Override
public void finish() {
super.finish();
Log.i("MainActivity", "++++++finish");
}
}
SecondActivity
public class SecondActivity extends BaseActivity {
private MyLocalReceiver localReceiver;
//本地广播的管理器，该机制发出的广播只会在APP内部传播，且广播接收者也只能收到本APP发出的广播！本地广播无法通过静态方式注册，相比起系统全局广播更加高效
private LocalBroadcastManager localBroadcastManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView textView = new TextView(this);
textView.setText("发送本地广播");
textView.setGravity(Gravity.CENTER);
setContentView(textView);
localReceiver = new MyLocalReceiver();
IntentFilter intentFilter = new IntentFilter(MyActions.MY_BROADCAST_ACTION_LOGIN_OTHER);
//可以通过addAction()方法添加多个Action
localBroadcastManager = LocalBroadcastManager.getInstance(this);
localBroadcastManager.registerReceiver(localReceiver, intentFilter);//注册广播接收者，设置过滤器
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
localBroadcastManager.sendBroadcast(new Intent(MyActions.MY_BROADCAST_ACTION_LOGIN_OTHER));
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
localBroadcastManager.unregisterReceiver(localReceiver);
Log.i("SecondActivity", "++++++onDestroy");
}
@Override
public void finish() {
super.finish();
Log.i("SecondActivity", "++++++finish");
}
}
Activity管理类
/** 一个用于在应用退出时关闭所有Activity的容器管理类 */
public class ActivityCollector {
private static List<Activity> activities = new ArrayList<Activity>();
public static void addActivity(Activity activity) {
activities.add(activity);
}
public static void removeActivity(Activity activity) {
activities.remove(activity);
}
public static void finishAll() {
for (Activity activity : activities) {
if (!activity.isFinishing()) {
activity.finish();
}
}
}
}
自定义的Action
public class MyActions {
public static final String MY_BROADCAST_ACTION_UNORDERED = "com.bqt.broadcast.songwennuan_unordered";
public static final String MY_BROADCAST_ACTION_ORDERED = "com.bqt.broadcast.songwennuan_ordered";
public static final String MY_BROADCAST_ACTION_LOGIN_OTHER = "com.bqt.broadcast.local_login_other";
}
一级广播接收者
public class Level1Receiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(MyActions.MY_BROADCAST_ACTION_ORDERED)) {//如果是无序广播，执行setResultData、abortBroadcast会报错！
System.out.println("Level1消息：" + getResultData());
setResultData("给农民兄弟发5000块钱");//更改接收到的广播内容，发给低优先级的应用
abortBroadcast();//阻止广播，但是不能阻止FinalReceiver接收广播，但能更改广播内容之后再发给他。放在setResultData前后都可以。
} else if (intent.getAction().equals(MyActions.MY_BROADCAST_ACTION_UNORDERED)) {
System.out.println("Level1消息：" + intent.getStringExtra("msg"));
}
}
}
二级广播接收者
public class Level2Receiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(MyActions.MY_BROADCAST_ACTION_ORDERED)) {
System.out.println("Level2消息：" + getResultData());
setResultData("给农民兄弟发2000块钱");//更改接收到的广播内容，发给低优先级的应用
} else if (intent.getAction().equals(MyActions.MY_BROADCAST_ACTION_UNORDERED)) {
System.out.println("Level2消息：" + intent.getStringExtra("msg"));
}
}
}
最终广播接收者
public class FinalReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(MyActions.MY_BROADCAST_ACTION_ORDERED)) {
System.out.println("Final消息：" + getResultData());
} else if (intent.getAction().equals(MyActions.MY_BROADCAST_ACTION_UNORDERED)) {
System.out.println("Final消息：" + intent.getStringExtra("msg"));
}
}
}
本地广播
/** 接收到本地广播后弹出对话框，关闭所有Activity，并调到MainActivity */
public class MyLocalReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, Intent intent) {
AlertDialog alertDialog = new AlertDialog.Builder(context).setTitle("警告：").setMessage("您的账号在别处登录，请重新登陆~").setCancelable(false)
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityCollector.finishAll();
Intent intent = new Intent(context, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//广播中启动Activity需要设置此flag，因为Activity需要一个栈
context.startActivity(intent);
}
}).create();
alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); //系统对话框权限：SYSTEM_ALERT_WINDOW
alertDialog.show();
}
}
清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.bqt.broadcast"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="21" />
<!-- 系统对话框权限 -->
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<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>
<activity android:name=".SecondActivity" />
<!-- —————————————————————自定义广播————————————————————— -->
<!-- 本地广播 -->
<receiver android:name=".myreceiver.MyLocalReceiver" >
<intent-filter>
<action android:name="com.bqt.broadcast.local_login_other" />
</intent-filter>
</receiver>
<!-- 无序广播和有序广播 -->
<receiver android:name=".myreceiver.Level1Receiver" >
<intent-filter android:priority="1000" >
<action android:name="com.bqt.broadcast.songwennuan_unordered" />
<action android:name="com.bqt.broadcast.songwennuan_ordered" />
</intent-filter>
</receiver>
<receiver android:name=".myreceiver.Level2Receiver" >
<intent-filter android:priority="500" >
<action android:name="com.bqt.broadcast.songwennuan_unordered" />
<action android:name="com.bqt.broadcast.songwennuan_ordered" />
</intent-filter>
</receiver>
<receiver android:name=".myreceiver.FinalReceiver" >
<intent-filter android:priority="10" >
<action android:name="com.bqt.broadcast.songwennuan_unordered" />
<action android:name="com.bqt.broadcast.songwennuan_ordered" />
</intent-filter>
</receiver>
</application>
</manifest>