意圖選擇器無法找到應用程序

Question

這是一個非常基本的問題，但我無法弄清楚。我想製作一個自定義意向選擇器。當我運行選擇器意圖時，它崩潰。當我用ACTION_VIEW運行intent時，它完美地工作。它向我展示了仿真器選擇器中的系統構建，當我選擇瀏覽器時，它開啓了Uri。

的ErrorMessage：

09-11 11:06:30.057 6070-6070/? D/dalvikvm﹕ Not late-enabling CheckJNI (already on) 
09-11 11:06:30.088 6070-6070/course.labs.intentslab D/dalvikvm﹕  GC_FOR_ALLOC freed 164K, 18% free 2795K/3404K, paused 1ms, total 3ms 
09-11 11:06:30.138 6070-6070/course.labs.intentslab D/libEGL﹕ loaded /system/lib/egl/libEGL_emulation.so 
09-11 11:06:30.138 6070-6070/course.labs.intentslab D/libEGL﹕ loaded /system/lib/egl/libGLESv1_CM_emulation.so 
09-11 11:06:30.138 6070-6070/course.labs.intentslab D/libEGL﹕ loaded /system/lib/egl/libGLESv2_emulation.so 
09-11 11:06:30.138 6070-6070/course.labs.intentslab D/﹕ HostConnection::get() New Host Connection established 0xb9579ef0, tid 6070 
09-11 11:06:30.189 6070-6070/course.labs.intentslab W/EGL_emulation﹕ eglSurfaceAttrib not implemented 
09-11 11:06:30.189 6070-6070/course.labs.intentslab D/OpenGLRenderer﹕ Enabling debug mode 0 
09-11 11:06:31.807 6070-6070/course.labs.intentslab I/Lab-Intents﹕ Entered startImplicitActivation() 
09-11 11:06:31.807 6070-6070/course.labs.intentslab I/Lab-Intents﹕ Chooser Intent Action:android.intent.action.CHOOSER 
09-11 11:06:31.988 6070-6070/course.labs.intentslab W/ChooseActivity﹕ Target is not an intent: null 
09-11 11:06:31.988 6070-6070/course.labs.intentslab D/AndroidRuntime﹕ Shutting down VM 
09-11 11:06:31.988 6070-6070/course.labs.intentslab W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xb181c678) 
09-11 11:06:31.988 6070-6070/course.labs.intentslab E/AndroidRuntime﹕ FATAL EXCEPTION: main 
android.app.SuperNotCalledException: Activity {android/com.android.internal.app.ChooserActivity} did not call through to super.onCreate() 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2177) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
     at android.app.ActivityThread.access$600(ActivityThread.java:141) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
     at android.os.Handler.dispatchMessage(Handler.java:99) 
     at android.os.Looper.loop(Looper.java:137) 
     at android.app.ActivityThread.main(ActivityThread.java:5103) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:525) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
     at dalvik.system.NativeStart.main(Native Method) 

的Java功能：

private void startImplicitActivation() { 

    Intent baseIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(URL)); 

    Intent chooserIntent = new Intent(); 
    chooserIntent.createChooser(baseIntent, "Open Browser..."); 

    startActivity(chooserIntent); 
} 

ChooserActivity.java（這是我ChooserActivity.java在SDK路徑發現我無法弄清楚如何我發現，文件在Android Studio中。

package com.android.internal.app; 

import android.content.Intent; 
import android.os.Bundle; 
import android.os.Parcelable; 
import android.util.Log; 

public class ChooserActivity extends ResolverActivity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     Intent intent = getIntent(); 
     Parcelable targetParcelable = intent.getParcelableExtra(Intent.EXTRA_INTENT); 
     if (!(targetParcelable instanceof Intent)) { 
      Log.w("ChooseActivity", "Target is not an intent: " + targetParcelable); 
      finish(); 
      return; 
     } 
     Intent target = (Intent)targetParcelable; 
     CharSequence title = intent.getCharSequenceExtra(Intent.EXTRA_TITLE); 
     if (title == null) { 
      title = getResources().getText(com.android.internal.R.string.chooseActivity); 
     } 
     Parcelable[] pa = intent.getParcelableArrayExtra(Intent.EXTRA_INITIAL_INTENTS); 
     Intent[] initialIntents = null; 
     if (pa != null) { 
      initialIntents = new Intent[pa.length]; 
      for (int i=0; i<pa.length; i++) { 
       if (!(pa[i] instanceof Intent)) { 
        Log.w("ChooseActivity", "Initial intent #" + i 
          + " not an Intent: " + pa[i]); 
        finish(); 
        return; 
       } 
       initialIntents[i] = (Intent)pa[i]; 
      } 
     } 
     super.onCreate(savedInstanceState, target, title, initialIntents, null, false); 
    } 
} 

更新：再次嘗試後，它顯示了我不同的錯誤我ssage。也許這有幫助。

09-11 13:07:00.900 21068-21068/course.labs.intentslab D/﹕ HostConnection::get() New Host Connection established 0xb8064840, tid 21068 
09-11 13:07:00.970 21068-21068/course.labs.intentslab W/EGL_emulation﹕ eglSurfaceAttrib not implemented 
09-11 13:07:00.970 21068-21068/course.labs.intentslab D/OpenGLRenderer﹕ Enabling debug mode 0 
09-11 13:07:03.120 21068-21068/course.labs.intentslab I/Lab-Intents﹕ Entered startImplicitActivation() 
09-11 13:07:03.120 21068-21068/course.labs.intentslab I/Lab-Intents﹕ Chooser Intent Action:null 
09-11 13:07:03.120 21068-21068/course.labs.intentslab D/AndroidRuntime﹕ Shutting down VM 
09-11 13:07:03.120 21068-21068/course.labs.intentslab W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xb17b5678) 
09-11 13:07:03.120 21068-21068/course.labs.intentslab E/AndroidRuntime﹕ FATAL EXCEPTION: main 
android.content.ActivityNotFoundException: No Activity found to handle Intent { } 

Answer 1

首先Intent.createChooser(Intent, CharSequence)是一種靜態方法。開始意圖就像

private void startImplicitActivation() { 
    Intent baseIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(URL)); 
    startActivity(Intent.createChooser(baseIntent, "Open Browser...")); 
} 

這就是更新錯誤信息的原因。您通過使用new Intent(Intent.ACTION_CHOOSER)創建您的選擇器最有可能獲得第一個。