我正在开发应用程序，当用户将耳机从手机上移除时显示警报 对话框，当用户按下确定按钮然后启动新活动。我的代码活动代码`
package com.gabriel.activity;
import java.util.HashMap;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore.Audio;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.RemoteViews;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;
import com.gabriel.database.AlarmCore;
import com.gabriel.database.ContactObject;
import com.gabriel.database.FBFriendObject;
import com.gabriel.utility.GBAlarmManager;
import com.gabriel.utility.GBConstants;
public class HomeActivity extends Activity implements OnClickListener {
private TextView _SecurityLevel, _AlarmType, _Trigger;
static TextView ActiveText;
private HashMap<String, String> _SettingMap;
private SharedPreferences _Preferences;
private ToggleButton _AlarmButton;
private ImageView _GabrielIconView;
private Resources _Resources;
private String _TriggerBy;
private Context context;
private GBAlarmManager alarmManager;
private AlarmCore alarmCore;
private boolean isTriggered = false;
private boolean isHeadPhoneAttached = false;
private Intent serviceIntent;
private GabrielApplication application;
private LocationManager locationManager;
private GpsLocationListener gpsLocationListener;
private NetworkLocationListener networkLocationListener;
private ContactObject contactObject;
private FBFriendObject fBFriendObject;
/*private static final CharSequence Gabriel = "Gabriel";
private static final CharSequence HeadphoneDeatched = "Headphone Deattached";
*/
/*
* registerObject = new RegisterObject(this); countryObject = new
* CountryObject(context); registerCore =
* registerObject.getRegistrationInfo();
*/
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 0; // in
// Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 0; // in
// Milliseconds
private static final int SUCCESS_DIALOG = 200;
private static final int Headphone_DIALOG = 250;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
context = this;
application = (GabrielApplication) getApplication();
contactObject = new ContactObject(this);
contactObject.getActiveContacts();
fBFriendObject = new FBFriendObject(this);
fBFriendObject.getActiveFriends();
ActiveText = (TextView) findViewById(R.id.ActiveText);
_SecurityLevel = (TextView) findViewById(R.id.securityLevelText);
_AlarmType = (TextView) findViewById(R.id.AlarmTypeText);
_Trigger = (TextView) findViewById(R.id.TriggerText);
_AlarmButton = (ToggleButton) findViewById(R.id.AlarmTrigger);
_GabrielIconView = (ImageView) findViewById(R.id.gabrielIcon);
_Resources = getResources();
alarmManager = new GBAlarmManager(context);
_AlarmButton.setOnClickListener(this);
_GabrielIconView.setOnClickListener(this);
// ContactList = (ListView) findViewById(R.id.contactList);
if (!application.isServiceStarted()) {
serviceIntent = new Intent(GBConstants.GABRIEL_SERVICE);
startService(serviceIntent);
}
initHeadPhone();
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
gpsLocationListener = new GpsLocationListener();
networkLocationListener = new NetworkLocationListener();
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, MINIMUM_TIME_BETWEEN_UPDATES,
MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, networkLocationListener);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
MINIMUM_TIME_BETWEEN_UPDATES,
MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, gpsLocationListener);
application.setCurrentLocation(getBestLocation());
}
@Override
protected void onResume() {
super.onResume();
if (application.isMessageSent()) {
application.setMessageSent(false);
showDialog(SUCCESS_DIALOG);
}
initSettings();
}
private void initSettings() {
_SettingMap = GBConstants.getSettingsMap();
_Preferences = getSharedPreferences(GBConstants.GABRIEL_PREF,
Context.MODE_PRIVATE);
_SecurityLevel.setText(_Preferences.getString(
GBConstants.SECURITY_LEVEL,
_SettingMap.get(GBConstants.SECURITY_LEVEL)));
_AlarmType.setText(_Preferences.getString(GBConstants.ALARM,
_SettingMap.get(GBConstants.ALARM)));
_Trigger.setText(_Preferences.getString(GBConstants.TRIGGER_OPTIONS,
_SettingMap.get(GBConstants.TRIGGER_OPTIONS)));
_TriggerBy = _Trigger.getText().toString().trim();
if (!isTriggered) {
setGabrielIconRed();
}
}
@Override
public void onBackPressed() {
return;
}
private void setGabrielIconRed() {
if (_TriggerBy.equals(GBConstants.PANIC_BUTTON)) {
_GabrielIconView.setImageDrawable(_Resources
.getDrawable(R.drawable.panic_button_black));
} else {
_GabrielIconView.setImageDrawable(_Resources
.getDrawable(R.drawable.black));
}
isTriggered = false;
_AlarmButton.setChecked(false);
}
private void setGabrielIconGreen() {
if (_TriggerBy.equals(GBConstants.PANIC_BUTTON)) {
_GabrielIconView.setImageDrawable(_Resources
.getDrawable(R.drawable.panic_button_green));
} else {
_GabrielIconView.setImageDrawable(_Resources
.getDrawable(R.drawable.green));
}
isTriggered = true;
}
@Override
public void onClick(View v) {
ToggleButton triggerBtn;
switch (v.getId()) {
case R.id.AlarmTrigger:
triggerBtn = (ToggleButton) v;
if (triggerBtn.isChecked()) {
ActiveText.setText("Activate");
if (_TriggerBy.equals(GBConstants.HEADPHONE_BUTTON)) {
if (contactObject.getActiveContacts().isEmpty() && (fBFriendObject.getActiveFriends().isEmpty())) {
ActiveText.setText("Deactivate");
_AlarmButton.setChecked(false);
Toast.makeText(this, "PLEASE ADD CONTACT/FRIEND",
Toast.LENGTH_LONG).show();
return;
}
if (!isHeadPhoneAttached) {
ActiveText.setText("Deactivate");
_AlarmButton.setChecked(false);
Toast.makeText(context, "Please Attached Your Headphones.",
Toast.LENGTH_SHORT).show();
return;
}
}
setGabrielIconGreen();
/*startService(new Intent(this, MyService.class));*/
} else {
ActiveText.setText("Deactivate");
setGabrielIconRed();
}
break;
case R.id.gabrielIcon:
if (isTriggered && _TriggerBy.equals(GBConstants.PANIC_BUTTON)) {
if (contactObject.getActiveContacts().isEmpty() && (fBFriendObject.getActiveFriends().isEmpty())) {
Toast.makeText(this, "PLEASE ADD CONTACT/FRIEND",
Toast.LENGTH_LONG).show();
return;
/*}
if(aactvity.toggleFacebook.isChecked()){
core.isFacebookOn();
}
else{
Toast.makeText(this, "FACEBOOK IS NOT CONNECTED",Toast.LENGTH_LONG).show();
return;
}
*/
}
callTriggerActivity();
}
default:
break;
}
}
@Override
protected void onPause() {
super.onPause();
}
@Override
public void finish() {
super.finish();
locationManager.removeUpdates(gpsLocationListener);
locationManager.removeUpdates(networkLocationListener);
}
private void callTriggerActivity() {
Intent intent = new Intent(context, TriggerActivity.class);
alarmCore = alarmManager.loadAlarmSettings(_AlarmType.getText()
.toString().trim());
intent.putExtra(getString(R.string.alarmObj), alarmCore);
startActivity(intent);
isTriggered = false;
}
public void initHeadPhone() {
registerReceiver(new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.hasExtra("state")) {
int state = intent.getIntExtra("state", 0);
if (isHeadPhoneAttached && state == 0) {
isHeadPhoneAttached = false;
if (isTriggered) {
if (contactObject.getActiveContacts().isEmpty()) {
Toast.makeText(context,
"PLEASE ADD CONTACT/FRIEND",
Toast.LENGTH_LONG).show();
} else {
/* createNotification();*/
/*callTriggerActivity();*/
showDialog(Headphone_DIALOG);
}
}
} else if (!isHeadPhoneAttached && state == 1) {
isHeadPhoneAttached = true;
}
}
}
}, new IntentFilter(Intent.ACTION_HEADSET_PLUG));
}
/*public void createNotification() {
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
for (int i = 0; i <= 10; i++) {
Notification notification = new Notification(R.drawable.app_icon,
HeadphoneDeatched, System.currentTimeMillis());
Intent notifyIntent = new Intent(Intent.ACTION_MAIN);
notifyIntent.setClass(getApplicationContext(), Main.class);
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setClass(this,TriggerActivity.class);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
PendingIntent pendingIntent=PendingIntent.getActivity(this, 0, intent, 0);
notification.setLatestEventInfo(this, Gabriel, HeadphoneDeatched, pendingIntent);
PendingIntent activity = PendingIntent.getActivity(this, 0, intent,
0);
notification.defaults |= Notification.DEFAULT_SOUND;
notification.sound = Uri.withAppendedPath(Audio.Media.INTERNAL_CONTENT_URI, "6");
notification.contentIntent = activity;
notificationManager.notify(0, notification);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
}
}*/
private class GpsLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
application.setCurrentLocation(location);
}
public void onStatusChanged(String s, int i, Bundle b) {
}
public void onProviderDisabled(String s) {
}
public void onProviderEnabled(String s) {
}
}
private class NetworkLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
application.setCurrentLocation(location);
}
public void onStatusChanged(String s, int i, Bundle b) {
}
public void onProviderDisabled(String s) {
}
public void onProviderEnabled(String s) {
}
}
private Location getBestLocation() {
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
String strLocationProvider = locationManager.getBestProvider(criteria,
true);
if (strLocationProvider == null) {
strLocationProvider = LocationManager.GPS_PROVIDER;
}
return locationManager.getLastKnownLocation(strLocationProvider);
}
@Override
protected Dialog onCreateDialog(int id) {
Dialog dialog = null;
AlertDialog.Builder builder = new Builder(context);
switch (id) {
case SUCCESS_DIALOG:
builder.setTitle(getString(R.string.app_name));
builder.setMessage("Panic messages have been sent with your position.");
builder.setPositiveButton("Continue", null);
builder.setCancelable(false);
dialog = builder.create();
break;
case Headphone_DIALOG:
/* dialog.setContentView(R.layout.home); */
builder.setTitle(getString(R.string.app_name));
builder.setMessage("Headphone Is Deattached The Press Ok To Sent Panic Message.");
builder.setPositiveButton("Ok",new positiveButtonListener());
builder.setCancelable(false);
dialog = builder.create();
break;
default:
break;
}
return dialog;
}
private class positiveButtonListener implements
android.content.DialogInterface.OnClickListener {
@Override
public void onClick(DialogInterface dialog, int which) {
callTriggerActivity();
}
}
}
我改变了我的manifest.xml文件。
<activity
android:name="HomeActivity"
android:screenOrientation="portrait"
android:launchMode="singleInstance"
android:taskAffinity=""
android:theme="@android:style/Theme.Dialog"
>
</activity>
` 在Android手机的原生屏幕上显示警告对话框。但它不起作用。当我脱离时 主屏幕上没有对话框。当我按应用程序图标然后在应用程序中显示对话框。请任何机构给我一些想法。 提前致谢
答案 0 :(得分：1)
对于您的问题，您必须为 ACTION_HEADSET_PLUG intent 注册一个接收器并从中创建一个receiver class to catch that broadcast，您可以实现自己的逻辑。
Check this answer以获取更多参考资料。
答案 1 :(得分：1)
我想在使用耳机时，您正在寻找广播接收器。它们可以帮助您处理已注册事件的实时事件。看看this post。