android Home键监听封装

最新推荐文章于 2021-12-27 10:53:07 发布

原创最新推荐文章于 2021-12-27 10:53:07 发布 · 421 阅读

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本文介绍了一个用于监听Android设备Home键的实用类HomeWatcher。通过该类可以捕获Home键的短按和长按事件，并执行相应的回调操作。

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public class HomeWatcher {

static final String TAG = "HomeWatcher";
private Context mContext;
private IntentFilter mFilter;
private OnHomePressedListener mListener;
private InnerRecevier mRecevier;

// 回调接口
public interface OnHomePressedListener {
public void onHomePressed();

public void onHomeLongPressed();
}

public HomeWatcher(Context context) {
mContext = context;
mFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
}

/**
* 设置监听
*
* @param listener
*/
public void setOnHomePressedListener(OnHomePressedListener listener) {
mListener = listener;
mRecevier = new InnerRecevier();
}

/**
* 开始监听，注册广播
*/
public void startWatch() {
if (mRecevier != null) {
mContext.registerReceiver(mRecevier, mFilter);
}
}

/**
* 停止监听，注销广播
*/
public void stopWatch() {
if (mRecevier != null) {
mContext.unregisterReceiver(mRecevier);
}
}

/**
* 广播接收者
*/
class InnerRecevier extends BroadcastReceiver {
final String SYSTEM_DIALOG_REASON_KEY = "reason";
final String SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS = "globalactions";
final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";
final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";

@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_DIALOG_REASON_KEY);
if (reason != null) {
Log.e(TAG, "action:" + action + ",reason:" + reason);
if (mListener != null) {
if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
// 短按home键
mListener.onHomePressed();
} else if (reason
.equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {
// 长按home键
mListener.onHomeLongPressed();
}
}
}
}
}
}
}

实用范例：

HomeWatcher homeWatcher = new HomeWatcher(this);
homeWatcher.setOnHomePressedListener(new OnHomePressedListener()
{
@Override
public void onHomePressed()
{
ActivityManager.getInstance().exitAll();
}

@Override
public void onHomeLongPressed()
{
ActivityManager.getInstance().exitAll();
}
});
homeWatcher.startWatch();