如何在android 收到广播后进行弹窗处理
时间: 2023-06-11 14:06:20 浏览: 103
在Android中,可以通过注册广播接收器来接收广播,并在接收到广播时弹出一个对话框。具体步骤如下:
1. 在AndroidManifest.xml文件中添加以下权限:
```xml
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
```
2. 创建一个广播接收器类,并在其中实现onReceive()方法:
```java
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// 接收到广播后弹出对话框
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("提示");
builder.setMessage("收到广播了!");
builder.setPositiveButton("确定", null);
builder.show();
}
}
```
3. 在需要接收广播的Activity中注册广播接收器:
```java
MyBroadcastReceiver receiver = new MyBroadcastReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction("com.example.broadcast.MY_BROADCAST");
registerReceiver(receiver, filter);
```
4. 发送广播:
```java
Intent intent = new Intent("com.example.broadcast.MY_BROADCAST");
sendBroadcast(intent);
```
当发送广播时,接收器的onReceive()方法会被调用,弹出一个对话框提示用户收到了广播。需要注意的是,在Android 6.0及以上版本中,需要动态请求SYSTEM_ALERT_WINDOW权限才能显示对话框,可以通过以下代码实现:
```java
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !Settings.canDrawOverlays(context)) {
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
intent.setData(Uri.parse("package:" + context.getPackageName()));
context.startActivity(intent);
} else {
// 显示对话框
}
```
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