嗨,这是我在stackoverflow上的第一个问题,我是Android编程的初学者。我浏览了大量的网页,但似乎无法找到我的解决方案。我想要做的是在用BroadcastReceiver 5秒后按下按钮时启动一项新的活动。这个活动将有一个新的用户界面与图形和声音(最终)。我得到了BroadcastReceiver的工作,但当它试图启动新的意图时程序崩溃。我究竟做错了什么?从BroadcastReceiver启动一个意图?
在我的MainActivity类别的方法:
public void setAlarm(){
Intent intent = new Intent(MainActivity.this, MyBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis() + 5 * 1000, pendingIntent);
}
我的广播接收器类:
public class MyBroadcastReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent){
Intent intent1 = new Intent(context, ShakeActivity.class);
context.startActivity(intent1);
Toast.makeText(context, "Broadcast works", Toast.LENGTH_LONG).show();
}
}
清单文件:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.shakecounter"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.shakecounter.MainActivity"
android:label="@string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.shakecounter.ShakeActivity"
android:label="@string/title_activity_shake" >
</activity>
<receiver android:name="com.example.shakecounter.MyBroadcastReceiver">
</receiver>
</application>
</manifest>
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); – 2014-10-07 07:42:08