context.startActivity時報錯startActivity() from outside of an Activity context require the FLAG_ACTIVITY_NEW_TASK flag

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原始碼如下：

 

 1 public class ReceiveHandler extends BroadcastReceiver{ 2  3     private final String ACTION_RECE_LinkReply="com.hutao.linkRequestReceive"; 4     private Context context; 5     private int ReceiveNumber; 6     private byte businessType; 7     @Override 8     public void onReceive(Context context, Intent intent) { 9         // TODO Auto-generated method stub10         this.context=context;11         if (intent.getAction().equals(ACTION_RECE_LinkReply)) {12             ReceiveNumber=intent.getIntExtra("number", 0);13             businessType=intent.getByteExtra("businessType", (byte) 0);14             switch (businessType) {15                 case DataReceive.AUDIO_CONNECT:16                     audioHandle();                    17                     break;18     19                 default:20                     break;21             }22             23         }24         25     }26     private void audioHandle() {27         // TODO Auto-generated method stub28         AlertDialog builder=new AlertDialog.Builder(context).setTitle("注意：")29                 .setIcon(R.drawable.dailog_icon)30                 .setMessage("MS0"+ReceiveNumber+"請求建立語音連線,是否同意？")31                 .setPositiveButton("同意", new DialogInterface.OnClickListener() {32                     33                     @Override34                     public void onClick(DialogInterface arg0, int arg1) {35                         // TODO Auto-generated method stub36                         /*發送語音連線請求，同意接收*/37                         System.out.println("進入語音連線請求中……………………");38                         new Thread(new DataSend(CreateSignal.LinkReply(businessType))).start();/*發送串連請求同意信令，businessType業務類型*/39                         new Thread(new DataSend(CreateSignal.AudioReceive())).start();/*發送音頻接收操作命令*/40                         Intent audioIntent=new Intent(context,PhoneInterface.class);41                         audioIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);42                         context.startActivity(audioIntent);43                     }44                 })45                 .setNegativeButton("取消", new DialogInterface.OnClickListener() {46                     47                     @Override48                     public void onClick(DialogInterface arg0, int arg1) {49                         // TODO Auto-generated method stub50                         51                     }52                 }).create();53         builder.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);54         builder.show();55     }56 57 }

 

在沒有audioIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);這句時候程式會報錯，報錯內容如下：

 1 06-28 11:24:40.359: E/AndroidRuntime(7397): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want? 2 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.app.ContextImpl.startActivity(ContextImpl.java:617) 3 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.content.ContextWrapper.startActivity(ContextWrapper.java:258) 4 06-28 11:24:40.359: E/AndroidRuntime(7397):     at com.hotalk.ui.homepage.favorites.FavoritesListAdapter$7.onClick(FavoritesListAdapter.java:1509) 5 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.view.View.performClick(View.java:2408) 6 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.view.View$PerformClick.run(View.java:8816) 7 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.os.Handler.handleCallback(Handler.java:587) 8 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.os.Handler.dispatchMessage(Handler.java:92) 9 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.os.Looper.loop(Looper.java:123)10 06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.app.ActivityThread.main(ActivityThread.java:4627)11 06-28 11:24:40.359: E/AndroidRuntime(7397):     at java.lang.reflect.Method.invokeNative(Native Method)12 06-28 11:24:40.359: E/AndroidRuntime(7397):     at java.lang.reflect.Method.invoke(Method.java:521)13 06-28 11:24:40.359: E/AndroidRuntime(7397):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)14 06-28 11:24:40.359: E/AndroidRuntime(7397):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)15 06-28 11:24:40.359: E/AndroidRuntime(7397):     at dalvik.system.NativeStart.main(Native Method)

報錯的原因：

Caused by: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

Context中有一個startActivity方法，Activity繼承Context，重載了startActivity方法。如果使用的startActivity方法，不會有任何限制，而如果使用Context的startActivity方法的話，就需要開啟一個新的task,遇到上面那個異常的，都是因為使用了Context的startActivity方法。解決辦法是：加一個flag，audioIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);