情况简述
- app正在运行
- app已退出
方案和思路
SplashActivity 用于显示app大图，同时进行用户登录等操作，服务器返回数据后跳转到MainActivity。
MainActivity app的主Activity。
DetailActivity MainActivity中点击Button进入的Activity，用于显示某件商品详情。
点击通知栏通知，假如app正在运行，则直接跳转到DetailActivity显示具体内容，在DetailActivity中按Back键返回MainActivity
点击通知栏通知，假如app已经退出，先从SplashActivity进入，显示app启动界面，初始化操作完成后进入MainActivity再跳转到DetailActivity显示具体内容，在DetailActivity中按Back键返回MainActivity。
代码实现
- PushService，在新进程中启动的Service，负责监听服务器，收到服务器的信息后将消息广播出去，在本demo中，为了简化，只是简单的广播一个消息
- ShowNotificationReceiver,在新进程中注册的BroadcastReceiver，收到PushService发的消息后，会在通知栏弹出通知
- NotificationReceiver, 在新进程中注册的BroadcastReceiver，用来设置点击通知栏通知的动作，打开app中的某个Activity
- SplashActivity, app启动页面，先是启动图片，3s后进入MainActivity
- MainActivity，app的主Activity
- DetailActivity，app中显示详情的Activity
PushService.java
PushService的工作很简单，启动后发一个广播在通知栏显示通知，然后常驻在后台
public class PushService extends Service{
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Log.i("PushService", "PushService onCreate");
//用AlarmManager定时发送广播
AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, ShowNotificationReceiver.class);
PendingIntent pendingIntent =
PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
am.set(AlarmManager.ELAPSED_REALTIME, SystemClock.currentThreadTimeMillis(), pendingIntent);
}
}
ShowNotificationReceiver.java
这个广播类用来在通知栏弹出通知
public class ShowNotificationReceiver extends BroadcastReceiver{
private static final String TAG = "RepeatReceiver";
@Override
public void onReceive(Context context, Intent intent) {
Log.d(TAG, "ShowNotificationReceiver onReceive");
//设置点击通知栏的动作为启动另外一个广播
Intent broadcastIntent = new Intent(context, NotificationReceiver.class);
PendingIntent pendingIntent = PendingIntent.
getBroadcast(context, 0, broadcastIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
builder.setContentTitle("这就是通知的头")
.setTicker("这是通知的ticker")
.setContentIntent(pendingIntent)
.setSmallIcon(android.R.drawable.ic_lock_idle_charging);
Log.i("repeat", "showNotification");
NotificationManager manager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(2, builder.build());
}
}
NotificationReceiver.java
点击通知栏后，会发送一个广播，NotificationReceiver收到该广播后，就会判断，app进程是否仍然存活，根据app进程的不同状态，定义不同的app启动方式
public class NotificationReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
int isAppRuning = isAppAlive(context, "com.rangeidc.android.alarm");
if (isAppRuning != 0) {
Log.i("NotificationReceiver", "the app process is alive");
int noType = pushNotifyBean.getNoType();
Bundle bundle = new Bundle();
if (noType == 1) {
long day = pushNotifyBean.getDay();
int reportType = pushNotifyBean.getReportType();
String building = pushNotifyBean.getBuilding();
Intent intent = new Intent(context, DailyShowActivity.class);
bundle.putLong("time", day);
bundle.putInt("type", reportType);
bundle.putString("address", building);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent, bundle);
} else if (noType == 0) {
String evtLogId = pushNotifyBean.getEvtLogId();
Intent intent = new Intent(context, NewIncidentDetailsActivity.class);
bundle.putString("evtLogId", evtLogId);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent, bundle);
}
return;
}
// 如果app进程已经被杀死，先重新启动app，将DetailActivity的启动参数传入Intent中，参数经过
// SplashActivity传入MainActivity，此时app的初始化已经完成，在MainActivity中就可以根据传入
// 参数跳转到DetailActivity中去了
Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage("com.rangeidc.android.alarm");
// 设置flag
launchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
Bundle bundle = new Bundle();
// 传递的数据
bundle.putSerializable("pushNotifyDate", pushNotifyBean);
// 设置跳转标志符
launchIntent.putExtra(Constants.PREF_EXTRA, bundle);
context.startActivity(launchIntent, bundle);
}
/**
* 返回app运行状态
*
* @param context 一个context
* @param packageName 要判断应用的包名
* @return int 1:前台 2:后台 0:不存在
*/
public static int isAppAlive(Context context, String packageName) {
ActivityManager activityManager = (ActivityManager) context
.getSystemService(Context.ACTIVITY_SERVICE);
List listInfos = activityManager
.getRunningTasks(20);
// 判断程序是否在栈顶
if (listInfos.get(0).topActivity.getPackageName().equals(packageName)) {
return 1;
} else {
// 判断程序是否在栈里
for (ActivityManager.RunningTaskInfo info : listInfos) {
if (info.topActivity.getPackageName().equals(packageName)) {
return 2;
}
}
return 0;// 栈里找不到，返回3
}
}
}
SplashActivity.java
SplashActivity.java先是app启动的图片，3s后进入MainActivity, 如果启动SplashActivity的Intent中带有参数，就将参数取出，放入启动MainActivity的Intent中
public class SplashActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
//隐藏ActionBar
getSupportActionBar().hide();
//使用handler倒数3秒后进入MainActivity
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent intent = new Intent(SplashActivity.this, MainActivity.class);
//如果启动app的Intent中带有额外的参数，表明app是从点击通知栏的动作中启动的
//将参数取出，传递到MainActivity中
if(getIntent().getBundleExtra(Constants.PREF_EXTRA) != null){
intent.putExtra(Constants.PREF_EXTRA,
getIntent().getBundleExtra(Constants.PREF_EXTRA));
}
startActivity(intent);
finish();
}
}, 3000);
}
}
MainActivity.java
MainActivity中，如果有参数传入，就在初始化结束后，根据参数启动DetailActivity，如果没有参数传入，就此结束自己的任务
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bundle extras = getIntent().getBundleExtra(Constants.PREF_EXTRA);
// 点击通知栏传过来的启动页-->mainActivity-->指定跳转页
if (extras != null) {
PushNotifyBean pushNotifyBean = (PushNotifyBean) extras.getSerializable("pushNotifyDate");
int noType = pushNotifyBean.getNoType();
Log.i("Notification：点击通知栏进入主页", pushNotifyBean.toString() + noType);
if (noType == 1) {
long day = pushNotifyBean.getDay();
int reportType = pushNotifyBean.getReportType();
String building = pushNotifyBean.getBuilding();
Intent intent = new Intent(mContext, DailyShowActivity.class);
intent.putExtra("time", day);
intent.putExtra("type", reportType);
intent.putExtra("address", building);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
} else if (noType == 0) {
String evtLogId = pushNotifyBean.getEvtLogId();
Intent intent = new Intent(mContext, NewIncidentDetailsActivity.class);
intent.putExtra("evtLogId", evtLogId);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
}
}
}
DetailActivity.java
比较简单，显示传入的参数即可:-D
public class DetailActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
Bundle bundle = getIntent().getExtras();
String address = bundle.getString("address");
Int type = bundle.getInt("type");
long time = bundle.getLong("time");
...
}
}