Question

如何将图像路径存储到array.as我正在动态检索图像。列出它们。在点击图像之后我想将它发送到上一个活动。我该如何存储图像路径？请帮帮我

below is code-

第1次活动 - public void importFile（View v）{

    Intent intent=new Intent(this,ImportFile.class);

    startActivityForResult(intent, 1);

}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);

    if(requestCode==1)
    {
        String path=data.getDataString();
        System.out.println(";;;;;;;;;;;;"+path);
    }
}

第二项活动 -

in oncreat-
 int j=0;
File[] imagefile;
 File f = new File("/sdcard");
        File[] files = f.listFiles();

        for(int i = 0; i < files.length; i++,j++) {
            File file1 = files[i];
             if(myfile.endsWith(".jpeg")){
                image[j]=file1;//here i'm getting nullpointer exception
            }
           }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        int j;
        // TODO Auto-generated method stub
        for(j=1;j<idcount;j++){
            if(ch[j].isChecked())
            {
                imagesPaths.add(image[++j].getAbsolutePath());

                i=new Intent();
                i.putExtra("files",imagesPaths);
                setResult(RESULT_OK, i);
                finish();
            }       
        }
    }

Answer 1

使用GSON库

http://www.mkyong.com/java/how-do-convert-java-object-to-from-json-format-gson-api/

您可以创建图像路径数组的json 字符串，然后将json字符串存储到首选项

http://www.javacodegeeks.com/2011/01/android-quick-preferences-tutorial.html

所有活动都可以访问优先存储的价值。从另一个活动转换json字符串到数组，你可以使用该数组。

或

您可以在活动中创建静态数组，并可以在活动中静态使用它。

Answer 2

尝试这样：

您的被叫活动：

File f = new File("/sdcard");
File[] files = f.listFiles();
ArrayList<String> imagesPaths = new ArrayList<String>(); // Array to store the images paths



@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

    // TODO Auto-generated method stub
    i=new Intent();
    for(int j=0; j< ch.lenght; j++){
        if(ch[j].isChecked())
        {
             imagePaths.add(f[j].getAbsolutePath());
        }       
    }
    i.putStringArrayListExtra("files", imagePaths);
    setResult(RESULT_OK, i);
    finish();
}

您的来电活动：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
   super.onActivityResult(requestCode, resultCode, data);

   if(requestCode==1)
   {
       ArrayList<String> paths= data.getStringArrayListExtra("files");
       System.out.println(paths.toString());
  }

}

Answer 3

case 1:
            if(resultCode == RESULT_OK){  
                Uri selectedImage = imageReturnedIntent.getData();
                String path = getRealPathFromURI( selectedImage );
                LogMsg.d("PAth "+path);
                Bitmap b = getBitmap(path);
                bitmapList.add(b);
                adapter.notifyDataSetChanged();
            }
        break;

然后;

private String getRealPathFromURI(Uri contentUri) {
           ContentResolver resolver = getContentResolver();
           String[] proj = { MediaStore.Video.Media.DATA };
           Cursor cursor = resolver.query(contentUri, proj, null, null, null);
           int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
           cursor.moveToFirst();
           return cursor.getString(column_index);
        }

在android中存储来自sdcard的图像路径

3 个答案: