android_47_BroadcastReceiver_SD卡状态监测

效果:

清单:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.sg31.mediastatusreceiver"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
// 注册广播接收者
<receiver android:name=".MediaStatusReceiver">
<intent-filter >
<action android:name="android.intent.action.MEDIA_MOUNTED"/>
<action android:name="android.intent.action.MEDIA_REMOVED"/>
<action android:name="android.intent.action.MEDIA_UNMOUNTED"/>
<data android:scheme="file"/>
</intent-filter>
</receiver>
</application>

</manifest>


布局:

广播接收者:

package com.sg31.mediastatusreceiver;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class MediaStatusReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//判断收到的到底是什么广播
String action = intent.getAction();
if("android.intent.action.MEDIA_MOUNTED".equals(action)){
Toast.makeText(context, "SD卡可用", 0).show();
}
else if("android.intent.action.MEDIA_REMOVED".equals(action)){
Toast.makeText(context, "SD卡拔出", 0).show();
}
else if("android.intent.action.MEDIA_UNMOUNTED".equals(action)){
Toast.makeText(context, "SD卡不可用", 0).show();
}
}
}


控制器: