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我的应用程序中有一个活动,它正在访问来自其他应用程序的活动以完成某些任务(这可能是从 Play 商店应用程序下载的应用程序),我在按钮单击侦听器中使用以下代码启动活动,

Intent i=new Intent();
i.setComponent(new ComponentName("com.myapp.package", "com.myapp.package.className"));
i.setAction(Intent.ACTION_MAIN);
startActivity(i);

如果另一个应用程序有一些崩溃,并且做错了什么并且它崩溃了。

结果我的应用程序被活动管理器静默杀死,请在日志下方找到,

02-26 17:39:31.469   281   532 I ActivityManager: START {act=android.intent.action.MAIN flg=0x14000000 cmp=com.example.dummy.mydummyapp2.DummyApp2 (has extras) u=0} from pid 8487
02-26 17:39:31.469   281   532 W WindowManager: Failure taking screenshot for (230x143) to layer 22000
02-26 17:39:31.541 16816 16816 E AndroidRuntime: FATAL EXCEPTION: main
02-26 17:39:31.541 16816 16816 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.dummy.mydummyapp2/com.example.dummy.mydummyapp2.DummyApp2}: java.lang.NullPointerException
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.app.ActivityThread.access$600(ActivityThread.java:130)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.os.Handler.dispatchMessage(Handler.java:99)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.os.Looper.loop(Looper.java:137)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.app.ActivityThread.main(ActivityThread.java:4745)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at java.lang.reflect.Method.invokeNative(Native Method)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at java.lang.reflect.Method.invoke(Method.java:511)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at dalvik.system.NativeStart.main(Native Method)
02-26 17:39:31.541 16816 16816 E AndroidRuntime: Caused by: java.lang.NullPointerException
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at com.example.dummy.mydummyapp2.DummyProvider.search(DummyProvider.java:136)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at com.example.dummy.mydummyapp2.DummyApp2.onCreate(DummyApp2.java:115)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.app.Activity.performCreate(Activity.java:5008)
02-26 17:39:31.541 16816 16816 E AndroidRuntime:    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
.
.
02-26 17:39:31.553   281 24382 W ActivityManager:   Force finishing activity com.example.dummy.mydummyapp2/.DummyApp2
02-26 17:39:31.553   281 24382 W WindowManager: Failure taking screenshot for (230x143) to layer 22015
*****02-26 17:39:31.553   281 24382 W ActivityManager:   Force finishing activity com.example.dummy.mydummyapp1/.activities.DummyApp1*****
02-26 17:39:32.053   281   294 W ActivityManager: Activity pause timeout for ActivityRecord{a7082df0 com.example.dummy.mydummyapp2/.DummyApp2}
02-26 17:39:32.437   281   281 I ActivityManager: No longer want com.google.android.partnersetup (pid 31498): hidden #16
*02-26 17:39:42.437   281   294 W ActivityManager: Activity destroy timeout for ActivityRecord{a7082df0 com.example.dummy.mydummyapp2/.DummyApp2}*
02-26 17:40:16.265   281 24383 I ActivityManager: Process com.example.dummy.mydummyapp2 (pid 16816) has died.
02-26 17:44:10.305   281   444 W ThrottleService: unable to find stats for iface rmnet0

我不担心 dummyapp2 的崩溃,我只担心我的应用程序为什么会因为其他应用程序的崩溃而崩溃。

我在意图中尝试了不同的标志,如下所示,

i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

但没有结果。

这是android的正常行为吗,如果我的应用程序从其他应用程序启动一个活动并且其他应用程序崩溃了我的应用程序也崩溃了??????

请有人澄清一下,我被卡住了。

问候,

4

2 回答 2

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如果其他活动是特定的(例如,我使用了类似的条形码阅读器活动),您可以使用 startActivityForResult,

我用过类似的东西并为我工作,我希望它也对你有用,

Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "QR_CODE");
startActivityForResult(intent, 23);

在 ActivityResult 上,

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == 23) {
       if (resultCode == RESULT_OK) {
             // use result values
         final String contents = intent.getStringExtra("SCAN_RESULT");
         final String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
             //dosmthng
       }
    }
}

以返回的意图做某事。

在我的应用程序中,如果条形码阅读器应用程序崩溃了,我的应用程序仍然可以工作。

于 2013-02-26T14:53:54.133 回答
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请尝试在块中包围对其他活动/应用程序的调用try{} catch{},错误日志显示为NullPointerException,您可以通过这种方式控制崩溃。

于 2013-02-26T18:04:59.943 回答