android 廣播的使用

標籤：

在Activity中，註冊廣播的一個Demo。

總共分3步

第一步：定義一個BroadcastReceiver廣播接收類：

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, "處理action名字相對應的廣播", 200);            }        }            };

第二步：註冊該廣播：

public void registerBoradcastReceiver(){        IntentFilter myIntentFilter = new IntentFilter();        myIntentFilter.addAction(ACTION_NAME);        //註冊廣播              registerReceiver(mBroadcastReceiver, myIntentFilter);    }

第三步：觸發響應

mBtnMsgEvent = new Button(this);        mBtnMsgEvent.setText("發送廣播");        mBtnMsgEvent.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Intent mIntent = new Intent(ACTION_NAME);                mIntent.putExtra("yaner", "發送廣播，相當於在這裡傳送資料");                                //發送廣播                sendBroadcast(mIntent);            }        });    

最後附上完整代碼：

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 = "發送廣播";    private Button mBtnMsgEvent = null;        protected void onCreate(Bundle savedInstanceState){        super.onCreate(savedInstanceState);                //註冊廣播        registerBoradcastReceiver();                LinearLayout mLinearLayout = new LinearLayout(this);        mBtnMsgEvent = new Button(this);        mBtnMsgEvent.setText("發送廣播");        mLinearLayout.addView(mBtnMsgEvent);        setContentView(mLinearLayout);                mBtnMsgEvent.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Intent mIntent = new Intent(ACTION_NAME);                mIntent.putExtra("yaner", "發送廣播，相當於在這裡傳送資料");                                //發送廣播                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, "處理action名字相對應的廣播", 200);            }        }            };        public void registerBoradcastReceiver(){        IntentFilter myIntentFilter = new IntentFilter();        myIntentFilter.addAction(ACTION_NAME);        //註冊廣播              registerReceiver(mBroadcastReceiver, myIntentFilter);    }}

 

android 廣播的使用