在Android应用程序中附加任何类型的文件? [英] Attaching a file of any type in Android application?

问题描述

我正在构建一个应用程序，其中当用户按下应用程序上的浏览"按钮时，我想显示手机中的文件夹，用户可以在其中选择文件/图像.选择附件后，应用程序将在附件中显示文件名.我正在寻找的是文件附件机制在android中的工作方式，因此非常感谢任何代码示例或摘要.

I am building an application in which when a user press "Browse" button on the application I want to show folders from phone where user will select the file/image. Once the attachment is selected, application will show the file name in the attachments. What I am looking for is how the file attachment mechanism work in android so any code example or snippet in much appreciated.

谢谢.

推荐答案

您实际要做的是执行Intent.ACTION_GET_CONTENT.如果将类型指定为"file/*"，则文件选择器将允许您从文件系统中选择任何类型的文件.

What you actually want to do is execute Intent.ACTION_GET_CONTENT. If you specify type to be "file/*" then the file picker will allow you to select file of any type from the file system.

以下是一些读物:

• 有关ACTION_GET_CONTENT的Android文档
• 有效示例

• Android documentation on ACTION_GET_CONTENT
• A working example

这是从博客中提取的信息(由Android-er提供):

This is the extracted source from the blog (courtesy of Android-er):

public class AndroidPick_a_File extends Activity {

 TextView textFile;

 private static final int PICKFILE_RESULT_CODE = 1;

   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);

       Button buttonPick = (Button)findViewById(R.id.buttonpick);
       textFile = (TextView)findViewById(R.id.textfile);

       buttonPick.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub

    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
             intent.setType("file/*");
       startActivityForResult(intent,PICKFILE_RESULT_CODE);

   }});
   }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub
  switch(requestCode){
  case PICKFILE_RESULT_CODE:
   if(resultCode==RESULT_OK){
    String FilePath = data.getData().getPath();
    textFile.setText(FilePath);
   }
   break;

  }
 }
}

在获取选定文件的路径之后，就由您决定如何处理它:将路径存储在数据库中，在屏幕上显示等等.

After acquiring path to the selected file it is up to you on how are you going to handle it: store path in a database, display it on screen, etc.

如果要使用默认应用程序打开文件，请遵循此博客.再次，我提取了代码(由Hello World Codes提供):

If you want to open the file with a default application, follow advices in this blog. Again, I extracted the code (courtesy of Hello World Codes):

第一种方式:

String path="File Path";
Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
File file = new File(path);

intent.setData(Uri.fromFile(file));

startActivity(intent);

第二种方式:

String path="File Path";   
Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
File file = new File(path);

MimeTypeMap mime = MimeTypeMap.getSingleton();
String ext=file.getName().substring(file.getName().indexOf(".")+1);
String type = mime.getMimeTypeFromExtension(ext);

intent.setDataAndType(Uri.fromFile(file),type);

startActivity(intent);

请记住感谢那些应得的人(-.

Please remember to leave thanks to the guys who deserve it (-.

• http://android-er. blogspot.co.uk/2011/03/pick-file-using-intentactiongetcontent.html
• http://helloworldcodes.blogspot. co.uk/2011/10/android-open-folder-with-default.html

• http://android-er.blogspot.co.uk/2011/03/pick-file-using-intentactiongetcontent.html
• http://helloworldcodes.blogspot.co.uk/2011/10/android-open-folder-with-default.html

这篇关于在Android应用程序中附加任何类型的文件?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！