android 广播的使用
在Activity中，注册广播的一个Demo。
总共分3步
第一步：定义一个BroadcastReceiver广播接收类：
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver(){?
??????? @Override?
??????? public void onReceive(Context context, Intent intent) {?
??????????? String action = intent.getAction();?
??????????? if(action.equals(ACTION_NAME)){?
??????????????? Toast.makeText(Test.this, "处理action名字相对应的广播", 200);?
??????????? }?
??????? }?
?????????
??? };?
?
第二步：注册该广播：
public void registerBoradcastReceiver(){?
??????? IntentFilter myIntentFilter = new IntentFilter();?
??????? myIntentFilter.addAction(ACTION_NAME);?
??????? //注册广播???????
??????? registerReceiver(mBroadcastReceiver, myIntentFilter);?
??? }?
?
第三步：触发响应
mBtnMsgEvent = new Button(this);?
??????? mBtnMsgEvent.setText("发送广播");?
??????? mBtnMsgEvent.setOnClickListener(new OnClickListener() {?
??????????? @Override?
??????????? public void onClick(View v) {?
??????????????? Intent mIntent = new Intent(ACTION_NAME);?
??????????????? mIntent.putExtra("yaner", "发送广播，相当于在这里传送数据");?
?????????????????
??????????????? //发送广播?
??????????????? sendBroadcast(mIntent);?
??????????? }?
??????? });?
?????
?
?
-----最后附上完整代码：
package my.yaner;?
import android.app.Activity;?
import android.content.BroadcastReceiver;?
import android.content.Context;?
import android.content.Intent;?
import android.content.IntentFilter;?
import android.os.Bundle;?
import android.view.View;?
import android.view.View.OnClickListener;?
import android.widget.Button;?
import android.widget.LinearLayout;?
import android.widget.Toast;?
?
public class Test extends Activity{?
??? private final String ACTION_NAME = "发送广播";?
??? private Button mBtnMsgEvent = null;?
?????
??? protected void onCreate(Bundle savedInstanceState){?
??????? super.onCreate(savedInstanceState);?
?????????
??????? //注册广播?
??????? registerBoradcastReceiver();?
?????????
??????? LinearLayout mLinearLayout = new LinearLayout(this);?
??????? mBtnMsgEvent = new Button(this);?
??????? mBtnMsgEvent.setText("发送广播");?
??????? mLinearLayout.addView(mBtnMsgEvent);?
??????? setContentView(mLinearLayout);?
?????????
??????? mBtnMsgEvent.setOnClickListener(new OnClickListener() {?
??????????? @Override?
??????????? public void onClick(View v) {?
??????????????? Intent mIntent = new Intent(ACTION_NAME);?
??????????????? mIntent.putExtra("yaner", "发送广播，相当于在这里传送数据");?
?????????????????
??????????????? //发送广播?
??????????????? sendBroadcast(mIntent);?
??????????? }?
??????? });?
??? }?
?????
??? private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver(){?
??????? @Override?
??????? public void onReceive(Context context, Intent intent) {?
??????????? String action = intent.getAction();?
??????????? if(action.equals(ACTION_NAME)){?
??????????????? Toast.makeText(Test.this, "处理action名字相对应的广播", 200);?
??????????? }?
??????? }?
?????????
??? };?
?????
??? public void registerBoradcastReceiver(){?
??????? IntentFilter myIntentFilter = new IntentFilter();?
??????? myIntentFilter.addAction(ACTION_NAME);?
??????? //注册广播???????
??????? registerReceiver(mBroadcastReceiver, myIntentFilter);?
??? }?
}?
