[英]How can I make C# Xamarin.Android app run at phone start-up?
我一直試圖讓應用程序在手機啟動時運行,並最終在我按下KeyCode.CameraButton
時運行應用程序。 我正在使用一個名為BootReceiver
的類,它是從BroadcastReceiver
繼承的。 這是我的課:
namespace ColorPoint.Xamarin.XAndroid
{
[BroadcastReceiver]
[IntentFilter(new[] { Intent.ActionBootCompleted }, Priority = (int)IntentFilterPriority.LowPriority)]
public class BootReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Intent serviceStart = new Intent(context, typeof(MainActivity));
context.StartActivity(serviceStart);
}
}
}
目前,應用程序在收到廣播時重新啟動。 我從adb
命令提示符運行它來模擬啟動和手機重啟!
adb -s device-or-emulator-id shell am broadcast -a android.intent.action.BOOT_COMPLETED
這是我的清單文件,不確定它是否正確!
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="ColorPoint.Xamarin.XAndroid" android:installLocation="auto" android:versionCode="1" android:versionName="1.0">
<uses-sdk android:minSdkVersion="19" android:targetSdkVersion="19" />
<application android:label="Rexson Barcode Scanner" android:icon="@drawable/icon">
<receiver android:name=".BootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_INPUT_STATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<activity android:name="MainActivity" />
<activity android:name="com.google.zxing.client.android.CaptureActivity" android:exported="false" android:windowSoftInputMode="stateAlwaysHidden">
<intent-filter>
<action android:name="com.phonegap.plugins.barcodescanner.SCAN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</manifest>
需要一步一步來,但不能很好地調試它,當我模擬啟動時手機如何重置真是太奇怪了!
我只是嘗試手動重啟,應用程序嘗試啟動,但unfortunately [myapp] has stopped working
然后手機再次重啟。
似乎它試圖打開但立即崩潰,然后重新啟動手機。
從另一個例子中找到了這個,但同樣的事情,只是重新啟動手機..
public override void OnReceive(Context context, Intent intent)
{
if (intent.Action == Intent.ActionBootCompleted)
{
bool autoRestart = false;
var sp = context.GetSharedPreferences("preferences", FileCreationMode.Private);
autoRestart = sp.GetBoolean("autoRestart", false);
if (autoRestart)
{
Intent serviceStart = new Intent(context, typeof(MainActivity));
serviceStart.AddFlags(ActivityFlags.NewTask);
context.StartActivity(serviceStart);
}
}
}
您需要將ActivityFlags.NewTask
標志添加到意圖中,因為您要在活動上下文之外啟動活動。
崩潰是因為啟動接收器生成了Android.Util.AndroidRuntimeException
。
解決方案:
[BroadcastReceiver]
[IntentFilter(new[] { Intent.ActionBootCompleted }, Priority = (int)IntentFilterPriority.LowPriority)]
public class BootReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
Intent serviceStart = new Intent(context, typeof(MainActivity));
serviceStart.AddFlags (ActivityFlags.NewTask);
context.StartActivity(serviceStart);
}
}
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