MainActivity如下:
package cn.testhomekey;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.IntentFilter;
/**
* Demo描述:
* 利用广播监听设备的HOME和RECENT_APPS键被按下
*
* 参考资料:
* http://blog.csdn.net/imyfriend/article/details/8293399
* Thank you very much
*/
public class MainActivity extends Activity {
private HomeKeyBroadcastReceiver mHomeKeyBroadcastReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
protected void onStart() {
super.onStart();
mHomeKeyBroadcastReceiver=new HomeKeyBroadcastReceiver();
IntentFilter intentFilter=new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
this.registerReceiver(mHomeKeyBroadcastReceiver,intentFilter);
}
@Override
protected void onDestroy() {
if (mHomeKeyBroadcastReceiver!=null) {
this.unregisterReceiver(mHomeKeyBroadcastReceiver);
}
super.onDestroy();
}
}
HomeKeyBroadcastReceiver如下:
package cn.testhomekey;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class HomeKeyBroadcastReceiver extends BroadcastReceiver {
private final String SYSTEM_REASON = "reason";
//Home键
private final String SYSTEM_HOME_KEY = "homekey";
//最近使用的应用键
private final String SYSTEM_RECENT_APPS = "recentapps";
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
String systemReason = intent.getStringExtra(SYSTEM_REASON);
if (systemReason != null) {
if (systemReason.equals(SYSTEM_HOME_KEY)) {
System.out.println("按下HOME键");
} else if (systemReason.equals(SYSTEM_RECENT_APPS)) {
System.out.println("按下RECENT_APPS键");
}
}
}
}
}
Manifest.xml如下:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cn.testhomekey"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="8" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="cn.testhomekey.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 -->
<receiver android:name="cn.testhomekey.HomeKeyBroadcastReceiver">
</receiver>
</application>
</manifest>
main.xml如下:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="监听HOME和RECENT_APPS键"
android:layout_centerInParent="true"
/>
</RelativeLayout>
