一、 广播机制
广播类：
public class MyReveiver extends BroadcastReceiver {
//等待接收广播
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String str=intent.getStringExtra("gb");
Toast.makeText(context, str, Toast.LENGTH_LONG).show();
}
}
Activity类：
//发送一个广播
Intent intent=new Intent();
intent.setAction(Intent.ACTION_EDIT);
intent.putExtra("gb", "hi,我收到了消息！");
BroadcastDemo.this.sendBroadcast(intent);
Manifest代码清单：
<receiverandroid:name=".MyReveiver">
<intent-filter>
<actionandroid:name="android.intent.action.EDIT"/>
</intent-filter>
</receiver>
二、 广播机制
使用代码注册广播：
广播类：
public class SmsReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Bundle bundle=intent.getExtras();
Object[] objs=(Object[])bundle.get("pdus");
SmsMessage[] msgs=new SmsMessage[objs.length];
for(int i=0;i<msgs.length;i++){
msgs[i]=SmsMessage.createFromPdu((byte[])objs[i]);
String str=msgs[i].getDisplayMessageBody();
//System.out.println(new String(str.getBytes("unicode"),"gbk"));
Toast.makeText(context,str , Toast.LENGTH_LONG).show();
}
}
}
Activity类代码：
class Btn1 implements OnClickListener{
//注册广播，并声明通过类型
public void onClick(View v) {
// TODO Auto-generated method stub
rece=new SmsReceiver();
IntentFilter filter=new IntentFilter();
filter.addAction("android.provider.Telephony.SMS_RECEIVED");
BroadcastDemo2.this.registerReceiver(rece, filter);
}
}
class Btn2 implements OnClickListener{
public void onClick(View v) {
//取消注册
// TODO Auto-generated method stub
BroadcastDemo2.this.unregisterReceiver(rece);
}
}