android實現耳機插入和拔出狀態檢測

標籤：android開發   耳機   

在Android下實現檢測耳機插入和拔出，需要建立一個BroadcastReceiver，用來監聽"android.intent.action.HEADSET_PLUG"廣播。

實現步驟：

1.建立一個BroadcastReceiver的子類，並重寫onReceive()方法，在該方法中編寫接收到廣播後的處理邏輯；

2.建立一個Activity類，在onCreate()方法中使用registerReceiver()方法進行註冊監聽廣播；

3.在Activity中重寫onDestory()方法，使用unregisterReceiver()登出監聽廣播。

具體實現代碼如下：

廣播接收器類

package com.leigo.demo.receiver;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;/** * Created by Administrator on 2014/8/27. */public class HeadsetDetectReceiver extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        String action = intent.getAction();        if (Intent.ACTION_HEADSET_PLUG.equals(action)) {            if (intent.hasExtra("state")) {                int state = intent.getIntExtra("state", 0);                if (state == 1) {                    Toast.makeText(context, "插入耳機", Toast.LENGTH_SHORT).show();                } else if(state == 0){                    Toast.makeText(context, "拔出耳機", Toast.LENGTH_SHORT).show();                }            }        }    }}

package com.leigo.demo;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import com.leigo.demo.receiver.HeadsetDetectReceiver;public class MainActivity extends Activity {    private BroadcastReceiver receiver;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        /**         *  Broadcast Action: Wired Headset plugged in or unplugged         *  The intent will have the following extra values:         *  state - 0 for unplugged, 1 for plugged.         *  name - Headset type, human readable string         *  microphone - 1 if headset has a microphone, 0 otherwise         */        receiver = new HeadsetDetectReceiver();        IntentFilter intentFilter = new IntentFilter();        intentFilter.addAction(Intent.ACTION_HEADSET_PLUG);        registerReceiver(receiver, intentFilter);    }    @Override    protected void onDestroy() {        super.onDestroy();        unregisterReceiver(receiver);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

android實現耳機插入和拔出狀態檢測