android使用内置库打开特定文件夹

Question

我正在尝试使用gallery打开特定文件夹，并参考了gallery中的其他类似问题open image form Build\u，并实现了以下代码，但仍然失败并报告错误（如以下logcat所示）：

选择特定文件夹：

private void selectSpecificFolder()
{
    File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/MyFolder");
    Log.d("File path ", dir.getPath());
    String dirPath=dir.getAbsolutePath();
    if(dir.exists() && dir.isDirectory()) {
        Intent intent = new Intent(Intent.ACTION_VIEW, null);
        intent.setType("image/*");
        intent.setData(Uri.fromFile(dir));

        Log.d("b4performSpecificCrop_startActivityForResult::", Integer.toString(3));
        startActivityForResult(intent, 3);
        Log.d("afterperformSpecificCrop_startActivityForResult::", Integer.toString(3));
    }
    else
    {
        Toast.makeText(this, "No file exist to show", Toast.LENGTH_LONG).show();
    }  
}

活动结果：

protected void onActivityResult(int requestCode, int resultCode, Intent data) 
{
    super.onActivityResult(requestCode, resultCode, data);      
    if (requestCode == 3)
    {
        Log.d("INSIDE_ONACTIVITY_REQUEST3", Integer.toString(3));
        if (data==null) 
        {
            Toast.makeText(this,"No image selected",Toast.LENGTH_LONG).show();
        }
        else
        {
            Uri selectedImageUri = data.getData();
            String selectedImagePath = selectedImageUri.getPath();

            if(selectedImagePath!=null)
            {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_VIEW);
                intent.setData(selectedImageUri);
                startActivity(intent);
            }
        }   
    }

03-02 23:56:09.910: D/b4performSpecificCrop_startActivityForResult::(18133): 3
03-02 23:56:09.940: D/Instrumentation(18133): checkStartActivityResult  :Intent { act=android.intent.action.VIEW dat=file:xxxxx }
03-02 23:56:09.940: D/Instrumentation(18133): checkStartActivityResult  inent is instance of inent:
03-02 23:56:09.950: D/AndroidRuntime(18133): Shutting down VM
03-02 23:56:09.950: W/dalvikvm(18133): threadid=1: thread exiting with uncaught exception (group=0x40c6e1f8)
03-02 23:56:09.965: E/AndroidRuntime(18133): FATAL EXCEPTION: main
03-02 23:56:09.965: E/AndroidRuntime(18133): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file:xxxxx }
03-02 23:56:09.965: E/AndroidRuntime(18133):    at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1535)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at android.app.Instrumentation.execStartActivity(Instrumentation.java:1387)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at android.app.Activity.startActivityForResult(Activity.java:3195)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at com.abc.drawing.Doodlz.performSpecificCrop(Doodlz.java:1712)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at com.abc.drawing.Doodlz.access$20(Doodlz.java:1701)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at com.abc.drawing.Doodlz$43.onClick(Doodlz.java:1184)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:167)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at android.os.Looper.loop(Looper.java:137)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at android.app.ActivityThread.main(ActivityThread.java:4511)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at java.lang.reflect.Method.invokeNative(Native Method)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at java.lang.reflect.Method.invoke(Method.java:511)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
03-02 23:56:09.965: E/AndroidRuntime(18133):    at dalvik.system.NativeStart.main(Native Method)

在Logcat中，它报告android。所容纳之物ActivityNotFoundException：找不到可处理意图的活动{act=android.Intent.action.VIEW dat=file:xxxxx}这意味着什么，如何解决？谢谢

PS：对于该html" target="_blank">应用程序，它没有显示该特定文件夹中所有图像的单独布局。取而代之的是一个“打开文件夹”按钮，以便当用户按下按钮时。它只需使用内置库直接显示特定文件夹中的图像。

Answer 1

我想问题出在AndroidManifest中。xml

这是此问题的主要来源，请检查Mark Murphy的回答：https://groups.google.com/forum/?fromgroups#!主题/android初学者/nYFBeAgmkMU

这是一个次要但基本相同的问题Android：找不到处理意图错误的活动？它将如何解决