Question

我想在手机充电时通知用户，例如DUBattery saver应用程序在手机充电时通过屏幕覆盖通知

 public void onReceive(Context context, Intent intent) {
    try {

        IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
        Intent batteryStatus = context.registerReceiver(null, ifilter);

        int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
        boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
                status == BatteryManager.BATTERY_STATUS_FULL;

        if (isCharging == true) {
            Toast.makeText(context, "PLEASE UNPLUG", Toast.LENGTH_LONG).show();
        }
    }

我已经在broadcastreceiver中实现了这个代码，我该如何通知用户，或者在手机充电时打开应用程序

Answer 1

在广播接收器中收到回叫时，使用意图启动应用程序。

Answer 2

如果您的广播接收器被正确调用，则可以使用startactivity（）方法打开您的活动或应用程序。

这样的事情：

startActivity(new Intent(getApplicationContext(), youractivityname.class).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));

Answer 3

如果您想要打开活动，您只需为活动生成intent。

Intent intent = new Intent(Context, YourActivityClass.class);
startActivity(intent);

如果您想要通知用户某些通知，您可以如果您想了解有关意图以及如何开始活动的更多信息，您应该创建一个通知：

NotificationCompat.Builder mBuilder =
    new NotificationCompat.Builder(context)
    .setSmallIcon(R.drawable.notification_icon)
    .setContentTitle("My notification")
    .setContentText("Hello World!");
// Sets an ID for the notification
int mNotificationId = 001;
// Gets an instance of the NotificationManager service
NotificationManager mNotifyMgr = 
        (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// Builds the notification and issues it.
mNotifyMgr.notify(mNotificationId, mBuilder.build());

查看有关intents或有关通知[2]的Android文档。

Answer 4

检查电池的状态（充电与否）..使用此代码..

public static boolean isConnected(Context context) {
    Intent intent = context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
    int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
    return plugged == BatteryManager.BATTERY_PLUGGED_AC || plugged == BatteryManager.BATTERY_PLUGGED_USB;
}

然后，如果此函数返回true ..显示此代码的通知..

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
    .setSmallIcon(R.drawable.ic_launcher)
    .setContentTitle("Charging State")
    .setContentText("Your phone is charging");
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(1, builder.build());

Answer 5

首先准备广播接收器以侦听对ACTION_POWER_CONNECTED的更改，然后标记屏幕以保持开启状态。然后在onReceive of Broadcast Receiver-

public void onReceive { public static boolean isConnected（Context context）{ Intent intent = context.registerReceiver（null，new IntentFilter（Intent.ACTION_BATTERY_CHANGED））; int plugged = intent.getIntExtra（BatteryManager.EXTRA_PLUGGED，-1）; return plugged == BatteryManager.BATTERY_PLUGGED_AC ||插入== BatteryManager.BATTERY_PLUGGED_USB; }}

之后只需通知用户

NotificationCompat.Builder builder =       新NotificationCompat.Builder（上下文）       .setSmallIcon（R.drawable.notification_icon）       .setContentTitle（＆＃34;电话状态＆＃34;）       .setContentText（＆＃34;充电＆＃34）;

int notificationId = 12345;

NotificationManager notificationManager =           （NotificationManager）getSystemService（NOTIFICATION_SERVICE）;

notificationManager.notify（notificationId，builder.build（））;

我想在手机充电时通知用户，例如DUBattery saver应用程序在手机充电时通过屏幕覆盖进行通知

5 个答案: