如何将字符串转换为文件路径（SD卡路径）？ android

Question

我使用sax parser.my解析了我的xml文件，我的疑问是如何将字符串转换为文件路径。我有3个微调第一个微调显示我的父节点字符串值和第二个微调显示子节点名称标记值和第三个微调显示路径标记值。这是我的xml文件链接请参阅此链接= http://paste.org/42924

我希望你现在清楚我正试图将我的路径标记字符串值转换为SD卡文件路径。我将路径标记字符串值存储在path_List数组列表中。现在我得到了这个数组列表中的所有路径字符串值。如何将这个sting值转换为文件路径？我希望以同样的屏幕底部以网格视图格式显示图像。现在我将路径标记字符串值存储在我的数组列表中，数组列表名称是path_List。如何转换我的文件路径？

这是我的源代码：

public class ParxmlActivity extends Activity { 

    private String array_spinner[]; 
    private Cursor cursor; 
    private int columnIndex; 

    ParsedExampleDataSet parsedExampleDataSet= null; 


    ArrayList<String> hltag_List=new ArrayList<String>(); 

ArrayList<Subchild> sltag_List=new ArrayList<Subchild>(); 

    ArrayList<String> name_List = new ArrayList<String>(); 

    ArrayList<String> path_List =new ArrayList<String>(); 

    Spinner spinner_hltag,spinner_sltag, spinner_path; 

    ArrayAdapter<String> adapter_hltag; 
    ArrayAdapter<String> adapter_sltag; 
    ArrayAdapter<String> adapter_path; 
    int hltagPos = 0; 
    int sltagPos = 0; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     GridView sdcardImages = (GridView) findViewById(R.id.sdcard); 

      spinner_hltag= (Spinner) findViewById(R.id.spinner1); 
     spinner_sltag = (Spinner) findViewById(R.id.spinner2); 
     spinner_path =(Spinner) findViewById(R.id.spinner3); 

     try { 
      /* Get a SAXParser from the SAXPArserFactory. */ 
      SAXParserFactory spf = SAXParserFactory.newInstance(); 
      SAXParser sp = spf.newSAXParser(); 

      /* Get the XMLReader of the SAXParser we created. */ 
      XMLReader xr = sp.getXMLReader(); 

      /* Create a new ContentHandler and apply it to the XML-Reader */ 
      ExampleHandler myExampleHandler = new ExampleHandler(); 
      xr.setContentHandler(myExampleHandler); 

      /* Parse the xml-data from our file. */ 
      xr.parse(new InputSource(getAssets().open("neevee.xml"))); 
      /* Parsing has finished. */ 

      parsedExampleDataSet =myExampleHandler. myParsedExampleDataSet; 

      for (int i = 0; i < parsedExampleDataSet.gethltag().size(); i++) { 
       Log.v("gethltag SIZE ", ""+parsedExampleDataSet.gethltag().size()); 
       hltag_List.add(parsedExampleDataSet.getHLTag().get(i)); 
      } 


      sltag_List = parsedExampleDataSet.getSLTag(hltag_List.get(hltagPos)); 

      for(int i = 0; i < sltag_List.size(); i++) { 
       name_List.add(sltag_List.get(i).name); 
       path_List.add(sltag_List.get(i).path); 
      } 

      adapter_hltag = new ArrayAdapter<String>(ParxmlActivity.this,android.R.layout.simple_spinner_item, hltag_List); 
      spinner_hltag.setAdapter(adapter_hltag); 


      adapter_sltag = new ArrayAdapter<String>(ParxmlActivity.this,android.R.layout.simple_spinner_item, name_List); 
      spinner_sltag.setAdapter(adapter_sltag); 


      adapter_path = new ArrayAdapter<String>(ParxmlActivity.this,android.R.layout.simple_spinner_item, path_List); 
      spinner_path.setAdapter(adapter_path); 

     } catch (Exception e) { 

     } 
    } 
} 

Answer 1

GridView sdcardImages = (GridView) findViewById(R.id.sdcard); 
sdcardImages.setAdapter(new ImageAdapter(this)); 

//创建一个扩展BaseAdapter一个新的类名为ImageAdapter：

public class ImageAdapter extends BaseAdapter { 
    private Context mContext; 

    public ImageAdapter(Context c) { 
     mContext = c; 
    } 

    public int getCount() { 
     return path_List.length; 
    } 

    public Object getItem(int position) { 
      return null; 
    } 

    public long getItemId(int position) { 
     return 0; 
    } 

//创建供参考的每个项目一个新的ImageView适配器

public View getView(int position, View convertView, ViewGroup parent) { 
     ImageView imageView; 
     if (convertView == null) { // if it's not recycled, initialize some attributes 
      imageView = new ImageView(mContext); 
      imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); 
      imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
      imageView.setPadding(8, 8, 8, 8); 
     } else { 
      imageView = (ImageView) convertView; 
     } 
for (int i=0;i<path_List.size();i++){ 
Bitmap bitmap = BitmapFactory.decodeFile(path_List); 

     imageView.setImageBitmap(bitmap); 
     return imageView; 
} 


    }