Android -- 检测耳机插入状态

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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();
}
}
}
}
}