意图不启动

Question

我想从厨房中选择一个图像，然后处理它，我通过按下主活动上的一个按钮，然后开始一个新的活动，您可以选择一个建立图像或选择你自己的图像，当我想选择自己的图像时，应该打开图库，让我选择一个图像，怎么这不起作用（虽然它以前工作，我想我只是打破了一些东西，但不知道是什么）

我的代码：

package il.popov.ecptest; 

import android.app.ListActivity; 
import android.content.Intent; 
import android.database.Cursor; 
import android.graphics.BitmapFactory; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 

public class select_activity extends ListActivity { 

ListView listView; 
Intent intent; 


@ 
Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 


    String[] StringArray = { 
     "Select your own", "image1", "image2", "image3", "image4", "None" 
    }; 
    setListAdapter(new ArrayAdapter <String> (this, R.layout.support_simple_spinner_dropdown_item, StringArray)); 
    intent = new Intent(this.getApplicationContext(), main_activity.class); 
    listView = getListView(); 
    listView.setTextFilterEnabled(true); 
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@ 
     Override 
     public void onItemClick(AdapterView <? > arg0, View arg1, int position, long arg3) { 
      processClick(position); 
     } 
    }); 
} 



public void processClick(int position) { 
    switch (position) { 
     case 0: 
      //Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI); 
      //startActivity(i); 

      Intent photoPickerIntent = new Intent(Intent.ACTION_PICK); 
      photoPickerIntent.setType("image/*"); 
      startActivityForResult(photoPickerIntent, 237); 

      //Returns to main activity , DO NOT CHANGE 
      startActivity(intent); 
      break; 
     case 1: 
      midClass.img = BitmapFactory.decodeResource(getResources(), R.drawable.image1); 
      midClass.isImageSelected = true; 
      startActivity(intent); 
      break; 
     case 2: 
      midClass.img = BitmapFactory.decodeResource(getResources(), R.drawable.image2); 
      midClass.isImageSelected = true; 
      startActivity(intent); 
      break; 
     case 3: 
      midClass.img = BitmapFactory.decodeResource(getResources(), R.drawable.image3); 
      midClass.isImageSelected = true; 
      startActivity(intent); 
      break; 
     case 4: 
      midClass.img = BitmapFactory.decodeResource(getResources(), R.drawable.image4); 
      midClass.isImageSelected = true; 
      startActivity(intent); 
      break; 
     case 5: 
      midClass.img = null; 
      midClass.isImageSelected = false; 
      startActivity(intent); 
      break; 
     default: 
      midClass.toastificate("Error in selection process"); 
      midClass.isImageSelected = false; 
      midClass.img = null; 
      break; 

    } 
} 



@ 
Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    midClass.toastificate("checking result"); 
    if (requestCode == 237 && resultCode == RESULT_OK && null != data) { 
     midClass.toastificate("Processing image"); 
     Uri selectedImage = data.getData(); 
     String[] filePathColumn = { 
      MediaStore.Images.Media.DATA 
     }; 

     Cursor cursor = getContentResolver().query(selectedImage, 
      filePathColumn, null, null, null); 
     cursor.moveToFirst(); 

     int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
     String picturePath = cursor.getString(columnIndex); 
     cursor.close(); 

     BitmapFactory.Options opt = new BitmapFactory.Options(); 
     opt.inMutable = true; 
     midClass.img = BitmapFactory.decodeFile(picturePath, opt); 
     if (midClass.img != null) { 
      midClass.isImageSelected = true; 
     } else { 
      midClass.isImageSelected = false; 
     } 

    } 
} 
} 

我用下面的权限：

<uses-permission android:name="android.permission.MANAGE_DOCUMENTS" /> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.BLUETOOTH" /> 

Answer 1

case 0: 
     //Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI); 
     //startActivity(i); 

     Intent photoPickerIntent = new Intent(Intent.ACTION_PICK); 
     photoPickerIntent.setType("image/*"); 
     startActivityForResult(photoPickerIntent, 237); 

     //Returns to main activity , DO NOT CHANGE 
     startActivity(intent);// Remove this line in your case 0