安卓学者请教各位大哥们:我的代码出现了哪里的问题 当我需要系统弹出一个系统对话框的时候老是报错
代码如下:这是我在Mainfest中注册的内容
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.wangsj.broadcastbestpractice"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="19"/>
<uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".LoginActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".MainActivity">
</activity>
<receiver android:name=".ForceOfflineReceiver">
<intent-filter>
<action android:name="com.example.broadcastbestpractice.FORCE_OFFLINE"/>
</intent-filter>
</receiver>
</application>
</manifest>
这是我在函数中调用系统对话框的的代码
public class ForceOfflineReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, Intent intent) {
AlertDialog.Builder dialogBulider = new AlertDialog.Builder(context);
dialogBulider.setTitle("Warning");
dialogBulider.setMessage("You are forced to be offline . Please try login again");
dialogBulider.setCancelable(false);
dialogBulider.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityCollector.finishAll();
Intent intent = new Intent(context, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
});
AlertDialog alertDialog = dialogBulider.create();
alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
alertDialog.show();
}
}
我的模拟器用的是android6.0 api用的是23 我已经仔细核对了代码与《第一行代码》中的代码完全相同,为什么我的不能运行成功求解释。新人c币不多,请个各位大侠行行好