标签:Toast content Broadcast intent import android Intent
Broadcast
静态注册
- 在清单文件中静态注册
<!-- 静态注册广播接收者-->
<receiver android:name=".CustomReceiver">
<!--设置有序广播的优先级,越大优先级越高-->
<intent-filter android:priority="100">
<action android:name="com.example.receiver_flag" />
</intent-filter>
</receiver>
- 静态发送
// 静态发送广播
public void sendAction1(View view) {
Intent intent = new Intent();
intent.setAction(ActionUtils.ACTION_FLAG);
// 必须指定包名
intent.setPackage("com.example.myactivity1");
sendBroadcast(intent);
// 发送有序广播
// sendOrderedBroadcast(intent, null);
}
- CustomReceiver.java
package com.example.myactivity1.receiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class CustomReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "静态接收者", Toast.LENGTH_SHORT).show();
// abortBroadcast(); // 在发送有序广播时,可以截断广播
}
}
动态注册
- 在代码中动态注册
// 动态注册自定义广播2
CustomReceiver2 customReceiver2 = new CustomReceiver2();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(ActionUtils.ACTION_FLAG2);
registerReceiver(customReceiver2, intentFilter);
// 注册网络状态变化接受者
// 要在注册清单中申请权限<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
intentFilter = new IntentFilter(); intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
registerReceiver(networkChangeReceiver, intentFilter);
- 动态发送
// 动态发送自定义广播2
public void sendAction2(View view) {
Intent intent = new Intent();
intent.setAction(ActionUtils.ACTION_FLAG2);
sendBroadcast(intent);
}
- CustomReveiver2.java
package com.example.myactivity1.receiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class CustomReceiver2 extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "动态接收者", Toast.LENGTH_SHORT).show();
}
}
- NetworkChangeReceiver.java
package com.example.myactivity1.receiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.widget.Toast;
public class NetworkChangeReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isAvailable()) {
Toast.makeText(context, "network is working", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(context, "network is unavailable", Toast.LENGTH_SHORT).show();
}
}
}
标签:Toast,content,Broadcast,intent,import,android,Intent 来源: https://www.cnblogs.com/sprinining/p/15248576.html
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