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", );
}
} };

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", );
}
} }; public void registerBoradcastReceiver(){
IntentFilter myIntentFilter = new IntentFilter();
myIntentFilter.addAction(ACTION_NAME);
//注册广播
registerReceiver(mBroadcastReceiver, myIntentFilter);
}
}
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