Question

我有一个空白的HelloWorld应用程序：

package tutorials.TestReceivers;

import android.app.Activity;
import android.os.Bundle;

public class TestReceiversActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

使用此BootReceiver.Java：

package tutorials.TestReceivers;

import android.content.BroadcastReceiver;

public class BootReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent arg1) {
    Intent intent = new Intent(context, TestReceiversActivity.class);
        context.startActivity(intent);    
    }
}

并且这个清单：

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".TestReceiversActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver
            android-permission="android.permission.RECEIVE_BOOT_COMPLETED"
            android:name="development.TestReceiversActivity.BootReceiver" >
            <intent-filter >
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.intent.action.SCREEN_ON" />
            </intent-filter>
        </receiver>
    </application>
</manifest>

运行应用程序并关闭它之后。

当我解锁屏幕（SCREEN_ON）时，没有任何事情发生。

当我启动决定时，我正在接下来的消息如下：

“应用程序TestReceiversActivity（tutorials.TestReceivers进程）意外停止。再试一次”

Answer 1

经过长时间的挫折，我解决了上面的问题。

注册引导广播接收器（以及根据它开放活动）的正确方法是：

空白的HelloWorld应用程序（TestReceiversActivity.java）：

package tutorials.TestReceivers;

import android.app.Activity;
public class TestReceiversActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

另一个Boot Receiver类（BootReceiver.java）

package tutorials.TestReceivers;

import android.content.BroadcastReceiver;
public class BootReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
         Log.d("DAVID", "Hi, Boot reciver was catch!");
         Intent i = new Intent(context, TestReceiversActivity.class);
         i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         context.startActivity(i);
       }
}

注意：您必须设置标志才能使其正常工作！

将清单设置为：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="tutorials.TestReceivers"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <application android:icon="@drawable/icon" android:label="@string/app_name">
            <receiver android:name=".BootReceiver" >
            <intent-filter >
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>
        <activity android:name=".TestReceiversActivity"
                  android:label="@string/app_name">
                <intent-filter >
                    <action android:name="android.intent.action.MAIN" />
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
        </activity>
    </application>
 </manifest>

享受！

Answer 2

删除android-permission="android.permission.RECEIVE_BOOT_COMPLETED"。为此权限添加<uses-permission>元素作为<manifest>元素的子元素。

如果问题仍然存在，请在Eclipse中使用adb logcat，DDMS或DDMS透视图来查看LogCat并检查与崩溃关联的堆栈跟踪。

Here is a sample project显示如何在启动时获得控制权。

SCREEN_ON无法在清单中使用。

Boot / ScreenOn广播接收器无法正常工作

2 个答案: