Android 通过广播接听Home键

Android 通过广播接听Home键,这个方式是比较好用的一种方式

1.自定义广播

public class BroadcastReceiverEx extends BroadcastReceiver{

	String SYSTEM_REASON = "reason";
    String SYSTEM_HOME_KEY = "homekey";
    String SYSTEM_HOME_KEY_LONG = "recentapps";  

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
            String reason = intent.getStringExtra(SYSTEM_REASON);
            if (TextUtils.equals(reason, SYSTEM_HOME_KEY)) {
                 //按了home键
            	Constants.isHome = true;
                //ToastUtil.showToast(context, "按了home键" + isHome);
            }else if(TextUtils.equals(reason, SYSTEM_HOME_KEY_LONG)){
                //长按home键,显示最近使用的程序列表  

            }
        }
    }  

}

2.注册广播

		//HOME键监听注册
		registerReceiver(new BroadcastReceiverEx(), new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));

3.按了Home键之后你想进行的操作

	@Override
	protected void onRestart() {
		super.onRestart();
		if (Constants.isHome) {
			// ToastUtil.showToast(context, ""+Constants.isHome);
			Constants.isHome = false;
			//按了HOME键重启的操作

		}
	}

4，判断是否是按了Home键

	/** 监听HOME键 */
	public static boolean isHome = false;

5.解除注册 （我是在Application中注册的所以我到onLowMemory中解除注解）

	@Override
	public void onLowMemory() {
		// TODO Auto-generated method stub
		super.onLowMemory();
		unregisterReceiver(broadcastReceiverEx);
	}

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