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Android -- 检测耳机插入状态

2024-07-18 02:14:37   221人阅读

原理                                                                                   

其实android系统在耳机插入和拔出的时候都会发送广播，所以我们要想检测耳机的状态只需要注册响应的BroadCastReceiver，对状态进行响应的判断就ok了。

这个广播的名字叫做：android.intent.action.HEADSET_PLUG

Code                                                                                   

package com.yydcdut.ear;import android.os.Bundle;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.view.Menu;import android.widget.Toast;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                //给广播绑定响应的过滤器          IntentFilter intentFilter = new IntentFilter();          intentFilter.addAction("android.intent.action.HEADSET_PLUG");          HeadsetReceiver headsetReceiver = new HeadsetReceiver();          registerReceiver(headsetReceiver, intentFilter);      }    //自己定义的广播接收器      public class HeadsetReceiver extends BroadcastReceiver {            @Override          public void onReceive(Context context, Intent intent) {              if (intent.hasExtra("state")) {                  if (0 == intent.getIntExtra("state", 0)) {                      Toast.makeText(context, "耳机未插入", Toast.LENGTH_SHORT).show();                  } else if (1 == intent.getIntExtra("state", 0)) {                      Toast.makeText(context, "耳机已插入", Toast.LENGTH_SHORT).show();                  }              }          }    }  }


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